Digital Equipment TU58 DECtape II User Manual

EK-OTU58-UG-004

TUS8

DECtape

II

User

Guide

,

EK·OTU58·UG·004

TUS8

DECtape

User

II

Guide

Prepared

Digital Equipment Corporation

by

Educational Services

of

Copyright () 1978, 1981, 1982. 1983

by Digital Equipment Corporation

1st Edition, October 1978

2nd Edition, June 1981

3rd Edition, October 1982

4th Edition, December 1983

The reproduction strictly prohibited. For copy information, contact the Educational Services Department. Digital Equipment Corporation, Maynard, Massachusetts 01754.

The information in this document without notice. Digital Equipment Corporation assumes responsibility for any errors that may appear document.

This equipment generates, ml.($, and may emit radio quency. The equipment has been type tested and found to comply with the limits for a Class A computing device pursuant to Subpart J designed to provide reasonable protection against such radio frequency interference. Operation in a residential area may cause interference the user whatever measures may .interference.

The following are trademarks poration, Maynard, Massachusetts.

at

of

this material, in part or whole,

Printed in U.S.A.

of

Part

his own expense

be

is

subject to change

in

15

of

FCC rules, which are

of

this equipment

in

which

case

will

be required to take

required to correct the

of

Digital Equipment Cor-

is

no

this

fre~

DEC DECUS

DIGITAL

RIIID

UNIBUS DECtape DECtape

II

DECnet DECsystem-l0 DECSYSTEM-20 DECwriter

DIooL

EduSystem VAX

MASSBUS

OMNIBUS

OS/8

PDT RSTS

RSX

VMS lAS VT

CHAPTER 1 INTRODUCTION

CONTENTS

1.1

1.2 General Description

1.3 Block Diagram

1.3.1 Drive Control

1.3.2 Processor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scope

...

"'

...

........

"'

......

..............................•..........•.......

..........................

...

, ,

...

" . "

......

" . . . . .

" "

......

" "

......

.. . .. . .......

" "

"'

..

"'

.........

" .

"'

........... " ..

. . . . . . . . . . . . . . . . . . . . . . . . . . .

.

........

,

.... " .......

,.

1-1

1-1 1-3 1-

1-3

1.4 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . 1-4

1.4.1 Performance . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.2 Electrical

1.4.3

Mechanical"

1.4.4 Environmental

1.S

Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . .

1.6 Hardware Documentation Ordering Information '

1.

7 Digital Repair Service

...........................................•...........

..........

.................

" .......

"'"."

""

.... " ..

".,,"'

"'"'."

. . . . . . . . . . . • . . • . . • . • . . • . . . . . . . . . . .

........

........•.......•.......................•.•...

"""

..

"'''''"."'

"

........

..

,,"'

, ,

"'.,,"'

........

""'.

'"

'

" 1-10

1-5

1-6

1-7 1-9

CHAPTER 2 OPERATION

2.1 TU58-DA,

2.1.1

Front

2.1.2 Run

2.1.3 Application and Removal

2.2 TU58·EA,

2.2.1 Front

2.2.2

Run

2.2.3 Application and Removal

2.3

2.3.1

TU58-VA Controls and Indicators

Front

2.3.2 Run

2.3.3 Application and Removal

2.4

TU58 Components Controls and Indicators

2.4.1 Application and Removal

2.5

Cartridge

2.5.1 Cartridge Loading. . . . . . . . . . . . . . . . . . . • • . . . . . . . • • . . . . • • . . . . . . . . . . . . .

2.5.2 Cartridge Unloading • . . • . • . • • • • . . . . • . • • . . . . . . . • . . . . . . . . . . . . . . . . . . . .

2.5.3 Keeping Track

2.5.4 Write Protect

2.5.5 Cartridge Storage and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.Maintenance

2.6.1 Head and Puck Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6.2 Operator Trouble Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6.3 Cartridge Wear

-CA

Rackmount Controls and Indicators

Panel

.•..............................................•....

Indicator.

-EB

Controls and Indicators

Panel

".""""""1O"""""

Indicator"

Panel

Indicator.

•........................................•...........

.

it

'"

Tab.

.. , ,.

........•....•.....•....

. . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . • . . • . . . . . . . . . .

of

Power

...................................

...........................•......

..

""

..

.,,,,,,,,,,,,,,,

" " " " " " " " " " " " " " " " " " "

of

Power

...................................

..

...

,,,,,,,,,,

'"

" " " " "

..

" • "

,.

..

" " " "

,.

" "

" " " " . " " " " " " " " " " " " " ... " " " " " " " " " "

..

~

...............•......•..•.••.....•.•.

• . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • • . • . • • • • . . . . . . . . . . 2-2

of

Power

of

Power

•••••••

of

it

Ii

•

it

••••

Cartridges. . . • . . . . . . • . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

..•.......•.•..•..•................

...•.........

.........•.........................

it

•

Ii

it

•••••

it • it

••

it

••••

'

...•... , ........

"

it

••••

it

...

it

••

.

it • ,. • it

. . • . . . • . • . . . . . • . . . . . . . . . . . . . . . . . . . . . . . • . . • . • . . . .

.......

•..

,.

........

,.

•.....

,. , ............

, . , . , . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1 2-1 2-1

2-1

2-2

2",,2

2-2 2-2 2-2

2-3 2-3

2-3

2-3 2-3

2-3 2-S

2-5

2-S 2-S 2-S

3

iii

· CHAPTER 3 PROGRAMMING

3.1

3.1.1

3.1.2

3.2

3.2.1

3.2.1.1

3.2.2

3.2.3

3.2.3.1

3.2.3.2

3.2.4

3.2.4.1

3.2.4.2

3.2.5

3.3

3.4

General

Radial Serial Protocol (RSP) and Modified

Instruction Set

PASCAL

Principles

.......................•.............•.............

Block Number, Byte Count, and Drive Number Special Handler Functions

Packets

Break

Command

.......

Packet

Usage

and

Initialization

Packets

Maintenance

" " " " " " "

""."""""

..

Mode

Special Address Mode

Data

Packets" " ..

" "

..

Radial Serial Protocol

Modified Radial Serial Protocol

End

Packets

..

" ... "

.... " ..

.. " .. " ....

" "

....•...••.•.••.•...........•.............

RSP

(MRSP)

..

" " " " " " "

"."""."

"""".,,,.,,,,,,,,"

... " ..

..

" " " " " " " " " " " " " " " " "

""""

..

""".".""""""".,.""

..

".""

....

""".,,,

...

,,.,,,,,,

...........•............•.•...................

...•.•.•..........•••.....•••...........•...

" " " ,

.. " ....

" " " "

.... " .. " ......

.......................••..•......•......•..

...........•......•...••...•..•.•.••

to

...... " ... " .....................

.. " ....

" ....... " ......... " . " ...

TU58 Handler Algorithm Definitions

............••.•..•......•

......•.•...••..•..•.

.. " ..

" , " "

...

... ,,.,,

..

,,

..

,,.,,,,,,,,,,,,,

..

,,

..

,,.,,,,,,,,,,,,,,,,.,,

" " " "

...

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..

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.,

" ....... " ..... "

.. " .. " ....

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..

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....

,,,,,,,,.

...

,,

....

,,,,,,.,, ...

....

" "

..

" " " . " ,

" • " "

" ........ " ... " "

...

..

CHAPTER4 INSTALLATION

4.1 Introduction"

4.2 Rack Installation

4.2.1

Rackrnount

4.2.2 Unpacking

4.2.3

Power

4.2.4 Removing Bottom Plates for Controller Board Configuration

..

" , " " " " " , " " , , " " " " " " " " , " " " " "

..

"""""""""""""""

..

"""

Selection

..

(-DA

Version) . . . . . . . . . . . • • • . • . . . • . . . . . • .

....

,,

111

, , " , , , "

..

"""""".""."

""

..

""""""""

•. " ..

..

"."""

"""""""."" ..

".".".""""

" " " " " " " " " " " " " " "

..

, , , , " , " , " , , , , " , " , , , • " , " • ,

..

,,

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....

..

,,""",,.,,"""",,

............•.•

.. " ""

•.

,,"",,

" " " " " " "

•• . • . . • . . . .

...

,,""""""

..

,,"",,.,,"

4.2.5 Rackmounting Procedure. . . . . . . . . . • . • . . . • . • • • • • • • . • • • . • • . . . . • . . . • • •

4.3 Rack Installation

4.3.1 Rackmount """."

4.3.2 Power Selection for the Rack Version

4.3.3 Removing Module from Chassis. • • . • . • . .

4.3.4 Reinstalling the Module

4.4 Installation

4.4.1 Tabletop Installation

4.4.2

Solid Mounting Installation

4.5 Installation

4.5.1 Tabletop Installation

4.5.2

Solid Mounting Installation

4.5.3 Mounting the

4.6 Components" ... , " " " " " " " , " " " " " " " " " " " " " "

4.7 Interface Standards Selection and Setup

4.7.1 Selecting Interface

4.7.2 Connecting Standards Jumpers

4.8 Operational Checkout

4.8.1 Checkout

4.8.2 Configuring Interface Modules

4.8.3 Checkout

(-EA

(-VA

of

Interface

of

Drive

(-CA

Version) . . • . . . . . . . . . . . . . . • . . • . . • . . • • • . . . • . • • • • • .

.. " ..

""."""""""".""."."""""""""" ... ""."""

.....•.....•••••.••.••..•.••..•..

..

. • • • •• • • . . • . • • . .

..••..•.............••••.•.•••••.••••.•••.•.

and

-EB

Versions)

.....................................

.....••..•.............•.•••.....•.••.••..••.•

.........................................

Version)

.•••..•.•....•.••..•...•......•••.••••.••.•.

.•........•••.•••••••....•.••••..•.••........•

.......•.•.•...............•...•...•..••.

TU58-VA

to

the

SBll

(or BAll-VA)

......................

e."

....

" .. " " " " " .. " " " " " " " " • " "

...•••..•.•..•.....•..•..........

Standards..

• . • . . • •• • . • . • . . . . • • . . • .

...

• • . •

..•..•.•......•..•••..••..•.•.....•....

.....••••.•......•......•.••..•..........••••.•

•.•......•••••••.•..•••.••...•••...•....•....

•• • • . • . . . . . . . . . . . . • . • • . • • . • . . • • . . . . • .

Command Function

...••...........••....••........

....

",,

..

. . .

.. . •. . •.

... ,,,,.... 4-7

..

. •

•.

......

.. " 4-13

.•

"

..

3-1 3-1 3-1 3-1 3-1 3-2 3-3 3-3 3-4 3-4 3-4 3-4 3-4 3-5 3-6

3-11

4-1

4-1 4-1

4-2 4-2 4-7

4-8 4-10 4-10 4-12 4-12 4-12 4-13 4-13 4-13 4-13

4-16 4-17 4-19 4-19 4-19 4-21 4-31

iv

CHAPTER S OPTIONS

5.1 Run Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.1 Installation . .

..

.. .. ..

..

.. .. .. .. .. .. ..

..

.. .. .. .. .. .. ..

..

.. .. .. ..

..

.. ..

..

.. .. ..

..

.. .. ..

..

.. ..

..

.. .. .. ..

..

5.2 Boot Switch.......................................... .....................................................................

5.2.1

5.2.2 S.2.3

General..............

................

Operation ......................................................

Installation~

.. . .. .. .. .. .. ..

.. .. . .. ..

..

.. .. .. . .. ..

..

.. ..

..........

e"

..................................

.. ..

..

.. .. .. . ..

...........•.....

.. .. .. . .. ..

.. ..

if

................

.. .. ..

.. .. . .. ..

..

. . 5-2

5-1

5-2

-2

5

APPENDIX A TUS8/pDP-ll TOGGLE-IN BOOT APPENDIX APPENDIX APPENDIX APPENDIX

B RSP SEQUENCE C SAMPLE DEVICE HANDLERS D CARTRIDGE REPAIR E FffiLD REPLACEABLE UNIT SPARES LIST

FIGURES

I-I Tape Cartridge Partially Inserted into Drive (Top View) 1-2 1-3 1-4 2-1 2-2 TU58-EA, -EB, and -VA 2-3

2-4 Write

2-5 3-1

An Exchange in Radial Serial

Protocol.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TU58 Block Diagram .........................................................................................

Block Locations TU58-DA and

on

Tape

...........•........................•..•.....

-CA

Rackmount Front

Front

Panel

Panel.

• • • . . . . . . . . . . . . . . . . . . . . . . . . . . .

.............

Cartridge Loading. . . . . . • • . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . 2-4

Protect Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . 2-4

View Into Tape Drive Cartridge Slot Read Command Packet Exchange

....................................

......................................

•.......•............

. . . . . . . . . . . . . . . . . . . . . . .

1-2 1-3 1-4 1-5 2-1 2-2

2-5

3-8

3-2 RSP Write Transaction . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . 3-9

3-3

4-1 4-2 Installing Support Brackets 4-3 Installing Mounting Brackets

MRSP

Write Transaction

TU58-DA Rear Panel

............................................•

................................................................................

..................................•...•....

••......•.......•.........................

3·10

4-2

4-3

4-4

4-4 Front Vertical Rail U-Nut Retainers. . . . . . . . . • . . . . . . . . . . . . . . . . . . • . • . . . . . . 4-4

4-5

4-6 Rear Vertical Support U-Nut Retainers 4-7 Fastening Support Bracket Extenders 4-8 Installing the Bezel . 4-9 Bezel and Ball Stud 4·10 Rackmounting the TU58-CA 4-11 4-12 Installing 4-13 Mounting the TU58-EA and 4-14 Mounting Choices for the 4-15 Interfacing the TU58-VA 4-16 Drive Outline Drawings . . . 4-17 Board 4-18 4-19 Data Rate and Cable Length for 4-20 Interface Selection Jumper Pin Locations

Rackmounting the TU58·DA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . .

..•.....•..........•...•..........

...•......................•........

• . • . . • . . . . . . • . . . • . • • • . • • • . . . . . . . • . • .

....................

'"

. • . . • • . • . . . • . • . . • . • • • . . . • • . • . . . . 4-8

...

• • • • .

...

• • .

...

. . 4-7

..........................................

TU58-CA Rear Panel

Cage

and Retainer

Outline Drawings

TU58 Drive Mounting Hardware

................

Bar.

• . . . . . . . . . .

-EB

.......................................

TU58· V A . • . . . .

..•...••..

• . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . .

•.

• . . .

...

. . • • . . • . • • . • . . • • • • . • . • . • • . . • . . • . . • . . .

.......................................

RS-423

".

. . . . . . . . . . . . . • • . • . . . . . . . . . . . .

..

. . . . • . . . . . . . . . . . • • . . . . . .

..

. . .

.. .. . .. ..

'.

........•...•••...•...............

. . . .

..

............••.......•.•.........

. . . . .

.. ..

.. . ...

.. ..

..•...............•.............

4-5

4-6

4-9

4-10 4-11 4-12 4-14 4·14 4-15 4-16 4-17 4-19 4-20

v

4-21

4-22 4-23 OLVII-J Factory Conftguration Summary

Factory

TUS8

Wiring

Wiring " .. " ....... " ....

(9600 Baud)

............................................

" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

...............................

4-24 MXVII-A Jumper Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1

D-l

0·2 0·3

D-4

0-5

Installation

Baseplate

Threading the Metal·Base Cartridge

of

Run Indicator

Screw

Locations

..........•...•.

.......

. . . . . . . . . . . . . . . . . . . . . . . . . .

" " . " " " " " "

...

" . "

..

" "

.......

•.•...•.....•........................

Head Gate and Spring. . . • . • . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stretch the Belt with the Floating Roller . . . . . . . . • . . . . . . . . . . . . . . . . . . . • . . . . 0-3

Threading the Plastic-Base Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . .

TABLES

4-21

4-21 4-25

• . . . . . . .

..

4-26

5-1

" . " . " . " . . . . 0-1

0-2

..

0-3

..

D-4

2-1

3-1

3-2

3-3

34

4-1

Operator Trouble Isolation. . • . . • . . . . . . . • . . . . . . . . . . . . • . • . . . . . . . . . . . . • . . 2·6

Command Packet Structure

Data

Packets"

.... " ...

" "

...

.. " ..

"."""

....

" "

... " ...... " ...... " ............

End Packet . • • . . . . . . . . . • • • . • . • . . . . . . . . . . .

Instruction

TU58 Module Connections

Set

""

" . " . " . . " " . " . " "

.....•.............................•........

..

" . "

4·2 MXVII-A Standard Factory Conftguration

""

...... " ... " ... " ...

""

..

".".,,

"

..

. • • . . . . . • • . . • . . . • . . . . . • • . 3·5

...

" . " " . " " . " . . . " . " " " . . " . " " . . . " " "

...............................

..

41

" . . .

• 3-3

3-5

3-7

4-18 4-27

vi

1.1

SCOPE

The

TU58

This

manual specific tem

manuals.)

DECtape

provides

information

II

is a low-cost,

information that a

about

using

the

mass-storage

user

needs

TU58

under

device

to

that

install,

may

be

interface,

DIGITAL operating

used

in a wide

and

systems,

CHAPTER 1

INTRODUCfION

variety of

operate the tape

refer

to

applications. system.

the

individual

(For

sys-

Chapter 1 mechanical

Chapter 2 operator's

Chapter 3 trates serial programming

Chapter 4 operational

Chapter 5 Appendix A lists

provides a general

requirements.

contains

reference

is a programming

command

protocol

sequences,

(MRSP),

example

describes

checkout

describes

a PDP-II Appendix B contains Appendix C lists

assembly

language.

sample

Appendix 0 covers

description

of the TU58

The configurations

important information

section.

guide.

explains

lists

system

for a TU58

instructions

of

the tape

the

optional

toggle-in

an

RSP

sequence

device

cartridge repair

It

contains the details of the radial instruction

device

for

jumper

system. features

bootstrap

to

handlers

procedures.

and a list

section

for

daily

describes

operation

functional

codes

and

handler.

selection;

available

for

in the

mechanical,

the TU58.

exercise a new

written

in

POP-ll FORTRAN

descriptions

serial

byte

TU58.

cartridge.

of

its

specifications,

the

available

and

routine

protocol

sequences,

electrical,

variations

maintenance.

of the

TU58

(RSP)

and

includes a general

and

IV

and

including

electrical

of the TU58.

It

is

the

command

and

the

interface

installation;

set,

modified

PDP-ll MACRO-ll

and

system

illus-

radial

purpose

and

Appendix E lists

1.2 GENERAL DESCRIPTION

The TU58 cartridges

which tracks. They disks

or

DECtape,

mented

in

an

the

field

replaceable

is

a random-access, fixed-length-block, mass-storage tape

store

262

kilobytes of data

may

be

accessed

using a new,

operating system

units

(FRUs)

in

by

a program

high-level

by

setting aside several

in a fashion

instruction set. A file-oriented structure

in

the TU58.

5I2-byte

1-1

blocks.

similar

blocks

system.

There are

to

on

the tape

that

It

uses

preformatted tape

256

blocks

employed

to

store a directory.

for

on

each of

data stored

is

easily

two

on

imple-

The TU58 iature, reel-to-reel packages containing 42.7 m (140 ft) of

is

compact and mechanically simple. The tape cartridges are DIGITAL-preformatted, min-

3.81

mm (0.150 in) wide tape. A single puck drives the tape by engaging a roller which moves an elastomer drive belt in the cartridge. This belt loops around both tape spools and provides uniform tension and spill-free winding without mechanical linkages (Figure I-I). The simple, single-point drive mechanism provides high reliability for the entire system.

The control and drive circuitry of the TU58

(p.P)

microprocessor

to reduce the tape handling and communications management load on the host

is

located

on

a single circuit board. The controller uses a system. The motor and tape head control, driver, and switching circuits that manage the two tape drives are

the printed circuit board with the operate

a time. The

p.P

at direction changes, etc. are managed by outputs from The mechanical actions of the drives are supervised by the

p.P.

The controller supports one or two drives, but only one drive can

controls all activities of the TU58. Head and motor selection, speed and

I/O

ports on a peripheral integrated circuit (IC).

p.P

in order to improve system performance.

Operational amplifiers, comparators, and logic circuits perform amplification, signal switching and ditioning, proportional control, and logic steering functions in the controller. The tape

is

protected by

on

con-

motor current limiting and an anti-runaway timer.

The

p.P

intelligence requires that requests from the host for data retrieval or storage contain only simple specifications about the transfer. The controller positions the tape and performs the transfer without vision

from the host.

The host and controller communicate in a format called either radial serial protocol

(RSP), or modified

super-

radial serial protocol (MRSP). RSP uses two kinds of byte sequences called message packets. Both command and data packets have protocol information placed in specific locations in the byte sequence. This

is

format cost. Figure

easily generated by the TU58, making host-peripheral interaction possible

1-2

illustrates a typical RSP exchange between a host computer and the TU58. See Chapter 3

for a full discussion of

RSP implementation

..

at

a high level with

low

DRIVE

PUCK

HEAD

MICROSWITCHES

SWINGOUT

WRITE PROTECT

TAB

DRIVE TAPE ROLLER

TAPE ELASTOMER CARTRIDGE

BELT

Figure I-I Tape Cartridge Partially Inserted into Drive (Top

GATE

MA·2380

View)

1-2

When, owing to the data transfer rate selected, the buffer fied serial protocol (MRSP)

See

Paragraph 3.2 for a more detailed description of MRSP implementation.

is

utilized.

MRSP

is

implemented by using the command packet switch byte.

is

unable to accept an entire transaction, modi-

The serial host interface operates on full-duplex, asynchronous, 4-wire lines

150 to 38.4K baud. Send and receive rates may

with Electronic Industries Association (EIA) standards

is

also compatible with devices complying with R8-232-C.

1.3

BLOCK

Figure passing to the host through the processor associated with the processor through the receiver-transmitter

1.3.1

The cartridge drive motors are powered by servo-regulated speed and direction circuits. These are controlled by the processor, which monitors with tachometers and with signals from the tape. The heads are selected by processor-controlled switches and either feed the automatic-gain-controlled amplifier and decoder circuits or are driven by write currents encoded by the processor.

1.3.2 Processor

The processor consists (ROM) and by scratchpad and processor communicates with the drive control circuitry through a bidirectional exchanges data between the TU58 processor bus and the host computer via the serial line drivers and receivers.

1-3

Drive

DIAGRAM

illustrates the structure of the TU58 system. The data path is along the top of the diagram,

(UART) are connected to the processor by an 8·bit-wide data/address bus.

Control

of

an 8085 processor supported by firmware in a 2-kilobyte, read only memory

data

buffer memory in a 256-byte random access memory (RAM). The

be

independently set with jumpers to operate in accordance

R8-422 or RS-423. When set to R8-423, the TU58

at

the right. The drive control is

I/O

ports. The ports, memory, and universal asynchronous

at

jumper-selectable rates of

at

the lower left, also closely

(AGe)

I/O

port. The UART

read

HOST

I COMMAND

..

DATA PACKET

..

DATA PACKET

Figure

1-2

I

CONTINUE I

I

CONTI~UE

I

An Exchange

I

END MESSAGE PACKET

TU58

• PACKET

•

MA·2384

in

Radial Serial Protocol

1-3

TO

HOST

Figure

1-3

TUS8

Block

1.4 SPEOFICATIONS

1.4.1

Performance

Capacity per cartridge

Data transfer rate

Read/write on tape Data buffer to interface

Cartridge life

Data reliability

Soft data error rate

Hard error rate

Hard

error rate with write-verify and system correction

Diagram

262,144 bytes, formatted in 512 blocks of 512 bytes each

41.7

ps/data

bit,

24

Kbits/s

150 to 38.4 kbaud, jumper selected

5000 minimum end-to-end-and-back

tape passes

1 in

107 bits read (before self-

correction)

109 bits read (unrecoverable

1 in

within 8 automatic retries) 2 in

1011

bits read/written

Error checking

Checksum with rotation

1-4

Average access

Maximmn

Read/write

Search

tape

time

access tirnc

tape

speed

Bit density

Flux

reversal density

Recording method

9.3 seconds

28

seconds

76

cm/s

(30

152

cm/s

(60

315

bits/em

945

fr/cm

Ratio

encoding

in/s)

(800

(2400

bits/in)

fr/in)

Medium

Track

format (Figure 1-4)

Drive

Drives

per

controller

1.4.2 Electrical

Power consumption

Board and drives

1

or

2

DECtape (140 Size: 6.1

X

0.5 in).

Two tracks,

II

ft)

of

3.81

X 8.1 X 1.3

Order

cartridge with 42.7 m

mm

(0.150 in) tape.

em

(2.4 X 3.2

TU58-K.

each

containing 1024 individually numbered, firmwareinterleaved manipulates four records operation

Single motor,

"records."

Firmware

at

to

form 512-byte blocks.

head

integrally cast

each

into molded chassis.

1

or

2 (only one may operate

at

a

time)

11

W typical, drive running

cor.

5 V

:t5%

at 0.75 A

+ 12 V + 10%

-5%

maximum

at

1.2

A,

peak

0.6 A average running

0.1 A idle

\

#128

JBOT

(

BOT

BOT:

BEGINNING

EDT:

END

Figure

#384

200

600

#0

#256

0

400

OF

1-4

TAPE

Block Locations on Tape

#129

201

#1

1

#385

601

#257

401

These voltages need not stabilize simultaneously

#130 #386

602

202

#2

#256

2 402

upon

~lJ

~3(

#254

376

#126

176

#

DECIMAL

OCT.AL

power-on.

#510

776

#382

576

1-5

#255

377

#127

177

#511

777

#383

577

~1\~;a37""

Rackmount

90-

128 Vac, 180 - 256 Vac,

47 -

63

Hz,

35

W maximum

Serial interface standards

1.4.3 Mechanical

Drive

Board

TU58-DA

TU58-CA cabinet

TU58-EA, -EB, -VA

Power board

rackmount

connector

to

In accordance with

RS-422 or RS-423;

compatible with RS-232-C.

8.1

H X 8.3 D X 10.6 W cm (3.2 X 3.3

X

4.1

in) with

19

cm

(7.5 in) cable;

0.23 kg (0.5Ib)

13.2 H X 26.5 D X 3.5 W

cm

(5.19 X

10.44 X 1.4 in); 0.24 kg (0.53Ib)

rackspace as -CA. See -EA for

Same chassis.

13.2 H X 38.1 D X 48.3 W

15.0 X 19.0 in); 9

kg

(20 lbs)

9.2 H X 29.5 D X 33.7 W

cm

(3.6 X

11.6 X 13.3 in); with rubber feet,

add

1.5 H cm

AMP

87159-6 with 87027-3 contacts

DIGITAL

(0.6 in)

PN

12-12202-09,

12-12203-00)

(5.19 X

Power connector to rackmount

Interface connector to board

1.4.4

When the quate cooling

Environmental

TU58-AB

if

the interior temperature is below 50° C (122° F) dry bulb, 26° C (79° F) wet bulb.

Maximum dissipation

TU58-CA, -DA, -EA, -EB

TU58-AB, -BB, -VA

Temperature

TU58 operating

TU58 nonoperating

Maximum temperature difference between ambient and

TU58 board

or

European

AMP

IEC

standard

87133-5 with 87124-1 locking clip contacts and 87179-1 index pin (PN

12-14268-02, 12-14267-00,

12-

15418-00)

-BB

is integrated in a host device such as a terminal, convection provides ade-

120

Btu/hour

34

Btu/hour

15°

C (590 F) to 42° C (1080 F) ambient

-34° C (-30°

F) to 60° C (1400 F)

18° C (32.4° F)

1-6

Relative humidity, noncondensing

TU58

TU

operating Maximum dew point Minimum dew point Relative humidity

58 nonoperating .

If

imum

a cartridge bas

or

should

This

is

1.5 CONFIGURATIONS

The

TU58

is available in the following configurations with accompanying designations.

minimum

be

rewound

done

to

23° C (73.4° 2° C (36° F) 10%

to 90%

5%

to 98%

CAUTION

been

exposed

temperature extreme,

one

complete

bring

tbe tape

to

F)

to eitber tbe max-

tbe

cycle

before

tbe proper

using.

tension.

tape

TU58·CA

TU58-DA

TU58-EA

TU58-EB

TU58-VA

Rackmount, large chassis, two drives, serial interface controller board, power supply

and

tenance agnostic kit (ZJ287-RG).

Rackmount, tabletop chassis, two drives, serial interface controller board, power

V

ROM Guide, Field Maintenance

Tabletop, two drives, serial interface controller board, power supply switch-selectable, detachable line cord hardware kit (MPOlOI4).

Tabletop, two drives, serial interface controller board,' power supply switch-selectable, detachable line cords and fuses for tridges, two accessory assembly hardware kit (70-16753-00), User Guide, Field Maintenance

Tabletop, two drives, serial interface controller board,

17569-1C), User Guide, Configuration Guide, Field Maintenance Print cessory assembly hardware kit

115/230

230 V, two cartridges, boot

Print

supply

and

230

for

Print

V switch-selectable, detachable line cords

Set

(MPOO747), two

115/230

V,

MRll-EA,

I/O

Set

I/O

V switch-selectable, detachable line cords

two cartridges, two

accessory assembly hardware kit (70-16753-00), User

(70-16753-00), User Guide, Field Maintenance

cables (BCI7A-18

(MPOlOI4).

cable (70-17568-1F), two cartridges,

ROM

I/O

Print

Sets (MPOlOI4

and

(70-16753-01).

for

MRII-EA,

cables (BC17A-18

cables (BCI7A-18

and

fuse for 115

BCI7B-18), boot

User Guide, Field Main-

and

MPOI063).

liS

MXVII-A-2

and

fuses for 115 V

and

BCI7B-18), di-

and

fuses for 115

and

BCI7B-18), boot

115/230

V,

accessory assembly

Print

115/230

V

and

230 V, two car-

ROM

for

MRll-EA,

dc

power cable (70-

boot

Set

(MPO 1 0 13), ac-

V

Set

V

ROM,

Additional

Supplies

BCllO-lO replaces BCl7A-l8

new

cable

ply

witb

8C220-lO

NOTE

and

BC17B-l8. The

has

an

improved

FCC

regulations.

Interface cable from TU58 to host.

1-7

shield

connection

to

com-

BC17A-18

Interface cable from TU58 to

pin connector).

DL-ll

and

DLV-ll,

5.4 m (18 ft) (lO-pin-to-40-

BC17B-18

BC21B-05

TU58-K TUC-OI ru58-DB TU58-EC

TU58-ED

TU58-VB

Interface cable from 100pin

connector).

Modem cable from

TU58 to

DLV-IlJ

and

MXV-ll,

TU58 to EIA connector,

1.5 m (5

5.4 m (18 ft) (to-pin-to-

ft) (lO-pin-to-DB25-P

male). Preformatted tape cartridges, available singly or in packs of

Tape Drive Cleaning Kit.

Rackmount installation kit for tabletop versions -EA, -EB, Accessory kit containing detachable line cord for 115

hardware kit

(70-16753-00), User Guide, Field Maintenance Print Set

V. (MPOI014). Accessory kit containing detachable line cords for

230

V,

two cartridges, two

MRII-EA,

for Field Maintenance

accessory assembly hardware kit (70-16753-00), User Guide,

Print Set (MPOI014).

Accessory kit containing dc power cable

I/O

cables (BCI7A-18 and BCI7B-18), boot ROM

(70-17569-1C), IF), two cartridges, MXVI1-A2 boot ROM, Field Maintenance Print

Set (MPOlO13), accessory assembly hardware kit (70-

115

V and 230 V and fuse for

I/O

User Guide, Configuration Guide,

16753-01).

five.

-VA. accessory assembly

cable (70-177568-

17-00090-00

70-16753-00

70-16753-01

23-126F3-O-O MXVI1-A-2 23-765A9-OO

Line cord

250

V.

Accessory assembly hardware kit with brackets for mounting TU58 tabletop

versions to flat surface. Accessory assembly hardware kit with brackets for mounting

TU58 tabletop

versions below a flat surface. Boot ROM for BDVl1. Boot ROM for

MXVII.

Boot ROM for MRII-EA.

1.6 HARDWARE DOCUMENTATION ORDERING INFORMATION

The

following TU58 DECtape

DIGITAL's Accessory and Supplies Group.

II

Tape Subsystem hardware manuals can be purchased from

Part

No

EK-OTU58-UG

EK-OTU58-PS

EK-OTU58-TM EK-OTU58-IP MPOO747 MPOI014-00 MPO

1 0

13-00,

MPOI063 ORDERING

You

can

order supplies and accessories from one Continental Call 800-258-1710,

Digital Equipment Corporation P.O.

Nashua, New Hampshire Call 603-884-6660, or mail order to:

USA

Box

CS2008

NH

Title TU58 TU58 DECtape TU58 DECtape TU58 DECtape TU58-C Field Maintenance Print TU58-E Field Maintenance Print TU58-V Field Maintenance Print TU58-D Field Maintenance Print

or

mail order to:

03061

DECtape

II

User Guide

II

Pocket Service Guide

II

Technical Manual (microfiche or paper)

II

Illustrated Parts Breakdown

Set

of

the

following addresses, according

to

your location.

Digital Equipment Corporation

P.O.

Box

CS2008

Nashua, Alaska Call

Canada Call

or

408-7344915, or mail order to:

Digital Equipment Corporation 632 Caribbean Drive

Sunnyvale,

800-267-6146,

Digital Equipment P.O. Kanata, Ontario, Canada K2K 2A6 Au: Telex:

NH

03061

Hawaii

CA

94086

or

mail order to:

of

Canada LTD.

Box

13000

A&SG Business Manager

610-562-8732

1-9

1.7 DIGITAL

Digital Field Service offers a range

ON

SITE

REPAIR

SERVICE

of

flexible service plans. Choose the one that

offers the convenience

of

service

at

your site and insurance against unplanned repair bills. For a small monthly fee you receive personal service from our Service the specialist

is

dispatched to your site with all the equipment and parts needed to give you fast and

dependable maintenance.

is

right for you.

Specialists. Within a

few

hours

BASIC

available to extend your coverage to 12-, 16-, or 24-hour days, and to

DECsenice maintenance. We don't leave until the problem

SERVICE

offers full coverage from 8 a.m. to 5 p.m., Monday through Friday. Options are

Saturdays, Sundays, and holidays.

offers a premium on-site service that guarantees extra-fast response and nonstop remedial

is

solved, which makes this service contract ideal for those

who need uninterrupted operations.

Under Basic Service and DECservice all parts, materials, and labor are covered in full.

CARRY

for a smaller monthly fee than Servicenters worldwide, service

Digital Servicenters are open during normal business hours, Monday through Friday. Call one

following numbers for the location

DECmailer offers expert repair

resources to troubleshoot, identify, and isolate the module causing the problem.

module to our Customer Returns Center where the module

-IN

SERVICE offers fast, personalized response and the ability to plan your maintenance costs

On-Site Service. When you bring your unit in to one

factory~trained

is

available on selected terminals and systems.

personnel repair your unit within two days (usually 24 hours). This

of

the office nearest you.

at

a per use charge. This service

is

for users who have the technical

of

You mail the faulty

is

repaired and mailed back to you within five

160 Digital

of

the

days.

PER

CALL SERVICE offers a maintenance program on a noncontractual, time-and-materials-cost basis.

is

This service

available with either On-Site or Carry-In service.

It

is

appropriate for customers who have the expertise to perform first-line maintenance, but may occasionally need in-depth support from Field Service.

Per Call Service maintenance beyond their contracted coverage hours. There

is

also offered as s supplementary program for Basic Service customers who need

is no materials charge in this case.

On-Site Per Call Service is provided on a best effort basis, with a normal response time

three days.

Carry-In Per Call Service

It

is

available 24 hours a day, seven days a week.

is

available during normal business hours, with a two to three day

turnaround.

For more information on

of

one

the following numbers for the location

Digital

Service plans, prices,

of

the Digital Field Service office nearest you.

and

special rates for volume customers, call

these

Digital International Field Service Information Numbers

U.S.A. Canada United Kingdom Belgium West Germany Italy Japan France

1-(800)-554-3333 (800)-267-5251 (0256)-57122 (02)-242-6790 (089)-9591-6644 (02)-617-5381/2 (03)-989-7161

1-6873152

Denmark Spain Finland Holland Switzerland Sweden Norway

1-10

of

two to

430-1005 91-7334370 90-423332 (01820)-34144 01-8105184 08-987350 2-256422

Z.1

TU58-DA,

-CA

RACKMOUNT

CONTROlS

AND

INDICATORS

CHAPTER 1

OPERATION

%01.1

The front drives. (six

Front Panel

panel

(Figure

2-1)

In addition, the decorative

on

the

-CA)

in

their

boxes.

has

two

bezel

%o1.ZRua .Indicator

an

Each tape drive has is

removed

Z.I.3

TUS8-DA

The able

on a system

need When

host

for

while

Application

has a power

to

be

turned

power

is

applied, the

an acknowledgement before it settles

indicator that lights

the tape

and

is

being

Removal

switch

power

controller, the TUS8

off.

Its idling

TU58

written, the cartridge

of Power

on

power

initializes itself, performs internal diagnostic tests,

description of the required exchange.

If

power

is

removed

removal.

while

a tape

is

being

slots

for

the tape cartridges and

has

a small compartment that can store

to

show

its backpanel,

may

consumption

down

written, data

tape

while

be

plugged

is

to

motion.

should

the

less

than

wait

for

may

two

tape

Since data

not

be

TUS8-CA

motion

loss

removed

does

not.

indicators

up

to

four

can

'occur

if a cartridge

if the indicator

If

an

outlet

into the controller. Otherwise, it

20

W.

and

then

instructions. See Paragraph

be

lost.

There are

no

other restrictions

for

the

cartridges

is

on.

is

avail-

does

not

asks

the

3.2.2

for

on

a

Figure

TAPE

STORAGE

AREA

2-1

TU58-DA and -CA Rackmount Front Panel

2-1

1.1 TU58-EA,

1.1.1 Front Panel

The front

panel

-ED

(Figure 2·2)

drives.

CONTROlS

has

two

AND

INDICATORS

slots

for

the tape cartridges and

two

tape

motion

indicators

for

the

1.1.1

Each tape drive

1.1.3

The

system to

When host

Run

Indicator

Application

TU58·EA and

power

be

turned

for

off.

power

is

an

acknowledgement before it settles

has

an

indicator that lights

and

Removal

-ED

versions

controller, these

Their idling

applied, the

TU58

of Power

have

versions

power

initializes itself, performs internal diagnostic tests, and then

description of the required exchange.

If

power

1.3 TU58-VA CONTROlS

1.3.1 Front Panel

The front panel (Figure

is

removed

removal.

while

2-2)

a tape

AND

has

is

INDICATORS

two

drives.

1.3.1

Each tape drive has

Run

Indicator

an

indicator that lights

to

power

may

switches

be

consumption

down

being

written, data

slots

for

the tape cartridges and

to

show

tape

on

plugged

is

less

to

show

tape

motion

their back

into

than

wait

may

motion

in

that

drive.

panels.

If

an

the controller. Otherwise, they

20

W.

for

instructions. See Paragraph 3.2.2

be

lost.

There are

two

tape

motion

in

that

drive.

outlet

is

available

do

no

other restrictions

indicators

not

asks

for

on

need

the

for

on

the

a

Figure

2-2

RUN

INDICATOR DRIVE 0

DRIVEO

TU58-EA,

-ED,

and -VA Front Panel

2-2

2.3.3 Application and Removal The

TU

58-VA requires + 5 V and +

fications in ber of

Paragraph 1.4.2 for power requirements of a controller board and two drives. The part num-

dc

power cable supplied with the

mation.

of

Power

12

V from the device to which it connects. See the electrical speciTU

58-VA

is

70-17569-1 C. See Chapter 4 for installation infor-

When power is applied, the host for an acknowledgement before it settles down to wait for instructions.

TUS8 initializes itself, performs internal diagnostic tests, and then asks the

See Paragraph 3.2.2 for a

description of the required exchange.

If

power is removed while a tape

is

being written, data may be lost. There are no other restrictions

on

power removal.

2.4 TUS8 COMPONENTS CONTROLS AND INDICATORS See Chapter 5 for installation and operation of optional features.

2.4.1 Application and Removal

of

Power

The TU58 may be supplied with power from a host system. It is ready for operation within one second of voltage stabilization. is less than 5 W.

.

'.

It does not neep to be turned off when not in use; its idling power consumption

When power is applied, the TU58 initializes itself, performs internal diagnostic tests, and then asks the host for an acknowledgment before it settles down to wait for instructions.

See Paragraph 3.2.2 for a

description of the required exchange.

If

power is removed while a tape is being written, data may be lost. There are

no

other restrictions on

power removal.

2.S CARTRIDGE

2.5.1 Cartridge Loading The

TU58 drive is designed to make correct loading easy. To load the cartridge, hold it label-up, line it

up

with the grooves in the chassis, and slide it in with a firm push. Figure

2-3

illustrates the fit of the

cartridge into the drive chassis grooves.

2.5.2 Cartridge Unloading Unloading the cartridge is as simple as loading. Just pull it straight out. stop (run indicator turns off) before removing the cartridge. The mechanism cannot be damaged by removing the cartridge while the tape message

is

sent to the host

if

a command is interrupted by removal of a cartridge. The cartridge may be

left in the drive as long as needed.

2.5.3 Keeping Track

If

the TUS8

is

used in a non-file-structured system, the cartridge does not have an identifying number

of

Cartridges

or label recorded on the tape. tridge was loaded; the operator must keep track of the contents of various cartridges.

2.5.4 Write Protect Tab Each tape cartridge has a movable tab which, when properly positioned, protects data on the tape from unintended write operations. When this write protect tab (Figure 2-4) the drive roller), it locks out the write circuitry.

When the write protect tab

is troller to write when it is commanded. The operator should be sure backed up with copies before loading them into the

It is best to wait for the tape to

is

moving, but

If

a cartridge is changed, the TUS8 does not know

in the outer position, it closes a switch in the chassis and allows the con-

if

a write is in progress, data may be lost. An error

that

a different car-

is

in the inner position (toward

that

system or program tapes are

TUS8 with their write protect tabs set to record.

2-3

....

U71

Figure

2-3

Cartridge Loading

Figure

2-4

Write Protect Tab

WRITE PROTECT

MOVE

..

TO

PROTECT

POSITION

LEFT

TO

TAB

IN

PROTECT

2-4

The write protect tab can

cartridge, use a fingernail under the protruding end to lift the protect tab. Replace its slot and pressing on it until it snaps. part way and then lift from the front. To replace it, drop it into its slot and press forward and down.

2.S.S Cartridge Storage and Care

Store cartridges in their cases, away from dust, heat, and direct sunlight. Do not touch the tape; there

no

safe way to clean the tape and permanent errors may result. Keep tools and other ferrous or magnet-

If

ic objects away.

specifications), and if the software operating system permits, wind it all the way through with a New-

(Paragraph 3.1.2) or equivalent command. or by requesting positionings to blocks

tape

the tape before attempting to store data on the cartridge.

2.6 MAINTENANCE

it is possible

be

completely removed for long-term write protection. On the metal-base

it

by dropping it into

On

the plastic-base cartridge, pry up the tab from its back edge

that

a tape has been exposed to environmental extremes (as listed in the

at

each end of

is

2.6.1

After the first 20 hours of break-in runtime on each drive. clean the head and motor puck with a longhandled cotton applicator moistened with DIGITAL cleaning fluid (from cleaning kit cent isopropyl alcohol, fluorocarbon TF, 113 or equivalent (Figure 2-5). Push the puck around with the applicator to clean its entire surface. hours errors caused by contamination. This is the only regular maintenance required by the

2.6.2 Operator Trouble Isoladon

Table applicable to components.)

2.6.3 Cartridge Wear

Cartridge tape is expected to last for 5000 end-to-end-and-back passes.

life. a read operation may require several retries to get the data in the presence error surface. This speck lifts the tape away from the head and causes signal loss and consequent read errors. A

it happens often. the tape is probably old and shedding oxide and should be copied and discarded as soon as possible.

Head and Puck Oeanlng

TUC-Ol),

'After the first cleaning, repeat the procedure after every 100

of

runtime. Regular cleaning minimizes tape and head wear and prevents tape damage and data

TU58.

2-1

lists potential problems and possible corrective actions and comments. (Some items are not

If

a cartridge is

is

a temporary data loss which

few

extra passes of the tape past the head may knock the speck away and allow error-free reading.

is

w;

~

usually caused by a speck of dirt or oxide on the tape or head

I

f£

:1

0

111

J

at

the end of its

of

soft errors. A soft

95

per-

If

MICROSWITCHES

Figure

I DRIVE

2-5

View

PUCK

Into Tape Drive Cartridge Slot

2-5

TAP~HEAD

Table 2-1 Operator Trouble Isolation

Symptom

TU58 does not respond to host

TU58

does not write

(reads okay)

Action/Comments

1.

Ensure socket (or proper dc source for -VA

2.

Check

3. Ensure

4.

Check both

If

S.

Remove the bezel

the indicator should light for a second, and then relight. This means the controller has passed its

automatic self-test and off, there is some problem within the board or in the interface.

Check serial interface is suspected interface cable. indicator from coming on.

1.

Check (Figure 2-4).

that

the

TU58-CA, -DA, -EA, or -EB is plugged into a live

or

components).

that

the

voltage selection switch is properly set.

that

the

fuse and power cord are intact

that

the

baud

rates

and

interface standards are

the

TU58

and

the

host interface board (Paragraph 4.7).

possible, observe the self-test indicator on the controller board.

on

the rackmount version. When power

half second,

is ready for operation.

that

the

that

interface cable is intact

and

An

open wire in

Other

the

write protect

tab

the

and

standards are correct, try a new

the

line from

causes require servicing.

is

set correctly on

and

go

out for another half

If

the indicator remains

properly inserted.

the

properly inserted.

the

same for

is

applied,

If

host prevents

the

cartridge

the

ac

the

Read

errors (some host operating systems may provide this or a similar message)

TU58

sends

motoNtopped

error messages

2.

The

trouble may be in a drive. Try writing on

the

problem except

1.

Clean

the

head.

The

tape

2. poor condition become a permanent format problems will produce cartridge.

3. Motor

This indicates section and should not conditions without checking is not getting near

may contain errors

or

head is reaching end

that

the

runaway timer has stopped the motor.

be

commanded

write protect

Dirt

or

if

data

a malfunction has occurred in

to

the

end where

tab

and

tape

oxide buildup

that

were written onto it.

is not verified

part

of

the

recording. A new cartridge with

the

same error message.

of

life. Replace drive.

move

tape

more than twice under these

the

cartridge. Make sure

it

might come free of

the

other drive. Any

setting requires service.

can

cause errors.

If

a

tape

at

write-time, errors may

Try

another

the

data

recovery

The

TU58

that

the tape

the

hub.

is in

2-6

3.1 GENERAL PRINCIPLES

The

TU58

such

initiate a packets. handshaking protocol mission

as

tape

complex

One

(RSP),

by

is

controlled

positioning

and

operation.

brief packet

sequences

or

the

modified

asynchronous

by a microprocessor

error retry.

The

can

contain a message

between

interfaces.

host

radial

Only

and

serial

that

one

ru58

TU58

protocol

frees

the

high-level

communicate

which

completely

as

well

as

(MRSP),

host

computer

command

via

from

to

the

strings

describes a high-level

packet format are

and

were

designed

CHAPTER 3

PROGRAMMING

device-related

microprocessor

of

one

or

more

defined

to

by

be

operations,

is

necessary bytes

command.

the

radial

suitable

for

to

called

The

serial

trans-

3.1.1

The

shows block, count, fied.

TU58

the ber the

3.1.2

Some

3.2 RADIAL SERIAL PROTOCOL (RSP) AND MODIFIED RSP (MRSP)

3.2.1

All There selected

manage

Block

TU58

the the

the

If

reads write of

the

additional

Special

Number,

uses a drive locations byte

TU58

the

host

as

many

function.

first

block

Handler

count

positions

asks

device-related

1.

A

short

complete

2.

brings A

the

losses)

the

TU58

presence

occur.

Packets

communication

are

two

types

using

the

protocol

and

Byte

number,

of

blocks

will

be

the

for a block

sequential

This

means

in a file

numbers.

Functions

functions

routine

called

wind-rewind

tape

to

handler

of

should

soft

between

of

multi-byte

command

control

Count,

block

on

the

512

or

specified

and

blocks

that

and

the

are

not

Newtape

for

proper

errors.

the

host

packet the

state of

and

Drive

number,

tape.

less.

When

drive

also

as

the

host

file's

dealt

new

operating

check

This

and

packets:

switch

Number

and

byte count

If

all

of the

the

host

(unit) at that

desired

asks

block

to

write

data

for

a particular

and

or

read data.

is

contained

transfers the

a byte count greater than that of the

are

needed

software

byte

with

(Appendix

or

environmentally

tension

the

success

enables

the

TU58

Control

byte.

the

system:

to or

count

to

directly

B)

levels.

code

action

is

accomplished

(Command)

In

addition,

INIT,

fulfill

the

an

on-tape

read

or

in

the

RSP,

should

be

(byte 3 of

to

be

there are three

Continue,

byte

file

write

all

the

included

stressed

the

taken

before

via

and

Data.

count. directory

the data

MRSP,

in a TU58

tape

RSP

sequences

Either RSP

and

XOFF.

block

The

cartridges.

or

hard errors (permanent data

single-byte

Figure

1-4

within a single

and a 512-or-Iess

number

512-byte

same

need

without

or

in

process

only

the

of boundary,

store

having

ru58

handler

This

MRSP

of

end

bytes

or

called

MRSP

packets

(Chapter

512-byte

byte

bytes

speci-

applies

the

num-

to

know

firmware.

to

provide

procedure

message)

packets.

may

used

1)

the

to

a

for

be

to

Control contains a write operation, ber, byte count

(Command)

message

for

and

- A Control packet

completely describing the operation

example, the

block

message

number.

is

sent

to

the

TU58

to

be

includes the function

3-1

to

initiate all operations. The packet

performed. In the case of a read

to

be

performed, unit (drive)

or

num-

A special case completion aborted operation.

of

an operation or on an error. The End packet includes the status

the Control packet, called an End packet,

is

sent from the TU58 to the host after

of

the completed or

Data - The Data packet holds messages

data

transferred from

than 128 bytes, the transfer is broken up and sent 128 bytes INIT

- This single-byte packet is sent to the TU58 to cause the power-up sequence. The TU58 returns Continue after completion, to indicate that the power-up sequence has occurred. When the TU5S makes a protocol error or receives an invalid command, it reinitializes and sends

tinuously to the host. When the host recognizes

protocol. Bootstrap - A flag byte saying Bootstrap (octal 10), followed by a byte containing a drive number,

causes the packaging. This simplifies bootstrap operations. Bootstrap may be sent by the host instead second

Continue Continue. This permits the

XON XOFF

host TU58 stops transmitting immediately and waits until the host sends Continue to complete the transfer when it receives XOFF.)

TU58 to read block 0

INIT

as part

- Before the host sends a Data packet to the TU58, it must wait until the TUS8 sends

- An alternate term for Continue.

- Ordinarily, the TU58 does not have to wait between messages to the host. However,

is

unable to receive all

or

to the TU58 during a read or write operation. For transmissions

of

the initialization process described below.

TU58 to control the rate that data packets are sent to it.

of

a message from the peripheral

is

ready. (Two characters may be sent

of

between 1 and 128 bytes. This message is actually the

INIT,

the selected drive.

of

larger

at

a time.

INIT

it sends Break to the TU58

It

returns the 512 bytes without radial serial

at

once, it may send XOFF. The

by

the UART to the host after the TUS8

to

restore the

con-

of

if

a

the

3.2.1.1

begin with a flag byte, which announces the type are as follows.

(Bits

Multiple-byte (Control and Data) packets also contain a byte count byte, message bytes, and two checksum bytes. The byte count byte are a 16-bit checksum. The checksum

while adding any carry back into the sum (end-around carry), The flag and byte count bytes are included in the checksum.

Packet Usage - Position within the packet determines the meaning

of

packet to follow. Flag byte numeric assignments

Flag

Byte

Value

Packet Data Control (Command) INIT Bootstrap Continue

XON

XOFF

5 - 7

Type

of

the

nag

byte are reserved.)

(See example in Appendix

Octal Binary 01 02 00010 04 00100

10 20 10000 21 23

00001

01000

10001 10011

is

the number

is

formed by summing successive byte-pairs taken as 16-bit words

of

message bytes in the packet. The two checksum bytes

8.)

of

each byte. All packets

3-2

3.2.% Break

of

the serial line, which normally switches between two logic states called mark and space,

space condition for

bit. The

If

Break and

Break and Initialization

is

a unique logic entity that can be interpreted by the TU58 and the host regardless

the protocol. This

is

the logical equivalent

at

least one character time. This causes the TU58's UART to set its framing error

of

a bus init or a master reset. Break

is

of

the state

transmitted when

is

kept in the

TU58 interprets the framing error as Break.

communications break· down, due to any transient problem, the host may restore order by sending

IN

IT

as outlined above. The faulty operations are cancelled, and the TU58 reinitializes it-

self, returns Continue, and waits for instructions.

With DIGITAL serial interfaces, the initialize sequence may be sent by the following sequence of oper-

Set

ations. transmit ready flag

The second character

discarded by the TU58. The TU58 responds to the second has been received, the initialize sequence

the Break bit in the transmit control status register, then send two null characters. When the

is

set again, remove the Break bit. This times Break to be one character time long.

is

discarded by the TU58controller. Next, send two

INIT

by sending Continue. When Continue

is

complete and any command packet may

INIT

characters. The first

follow.

3.2.3 Command Packets

The command packet format is shown in Table

bytes. Their definitions

follow.

Table 3-1 Command Packet Structure

3-1.

Bytes 0,

1,

12, and

13

are the message delivery

is

o

1

Byte

o

1 2

3 Modifier 4 Unit Number

Byte Contents Flag

= 0000 0010(028)

Message Byte Count = 0000 OpCode

101

O(

128)

5 Switches

Low

is

Flag

6 Sequence Number 7 Sequence Number - High 8 Byte Count 9 Byte Count - High

10

11

12

13

Block Number Block Number - High

Checksum Checksum - High

This byte

is

Low

set to 00000010 to indicate that the packet

Command packet.

Message Byte Count Number of bytes in the packet, excluding the four message de-

is

livery bytes. This

decimal

10

for all command packets.

a

12,13

Checksum The 16-bit checksum

of

bytes 0 through formed by treating each pair words with end-around carry.

3-3

11.

The checksum

of

bytes as a word and summing

is

The remaining bytes are defined below.

Op

2

Code

Operation being commanded. (See Table for definitions.)

34

and Paragraph 3.3

3

4·

5

6,7

8,9

Modifier Unit Number Switches Sequence Number Byte Count

Permits variations of commands. Selects drive Selects maintenance mode and specifies

Always zero for

0 or I.

TU58.

RSP

or MRSP.

Number of bytes to be transferred by a read or write command.

Ignored by other commands.

10,11

Block

Numbet

The block number to be used by commands requiring tape positioning.

3.1.3.1 Maintenance Mode - Setting bit 4 of the switches byte (byte 5) to I in a read command inhibits retries on data errors. Instead, the incorrect data The success code in the end packet indicates a hard

is

delivered to the host followed by an end packet.

dt~.ta

error. Since data is transmitted in 128-byte packets, a multiple packet read progresses normally until a checksum mismatch occurs. Then the bad data packet is transmitted, followed by the end packet, and the operation terminates.

3.1.3.1 Special Address Mode - Setting the most significant bit of the modifier byte (byte 3) to 1 selects special address mode. records

(0-2047) instead of 512-byte blocks (0-511). Zero-fill in a write operation only fills out to a 128-

In

this mode all tape positioning operations are addressed by 128-byte

byte boundary in this mode. To translate between normal addressing and special addressing, multiply the normal address by

4.

The result is the address of the first I 28-byte record of the block. Add

I,

2, or

3 to get to the next three 128-byte records.

3.1.4 Data Packets

3.1.4.1 Radial Serial is

packet

the command packet from host to the TU58. Next, the data

either direction (as required by read or write). After all data

If

the TUS8 encounters a failure before all data has been transferred, it sends the end packet as soon as the

Protocol-

A data transfer operation uses three or more message packets. The first

is

transferred in 128-byte packets in

is

transferred, the TU58 sends an end packet.

failure occurs.

The data packet

between 128

bytes

1 and

at whereas the message packets for the host has enough buffer space, the

is

shown in Table 3-2. The flag byte

128

bytes. For data transfers larger than 128 bytes, the transaction

a time. The host

TU58 only

has

TU58 to send the Continue flag 0208 before sending the next packet. Because the

is

set to 0018. The number

is

assumed to have enough buffer capacity to accept the entire transaction,

128 bytes

of

buffer space. For write commands, the host must wait between

of

data bytes may be

is

broken up and sent

TU58 does not wait for a Continue flag between message packets when it

sends back read data.

3.1.4.1 Modified Radial Serial entire transactions

at

the hardware selected data transfer rate, modified radial serial protocol (MRSP) may

be specified using the command packet switch byte. Bit 3 of the switch byte

3 remains set until intentionally cleared or cleared during power

Protocol-

When the host does not have sufficient buffer space to accept

is

set to specify the MRSP. Bit

up.

A good practice

is

to set bit 3 in every

MRSP command packet.

34

MRSP MRSP up),

the

and

including received XON

before

with

the

is

identical

for

the

ru58

from

transmitting

Continue

first will

send

the

last

the

host.

handshake.

to

time

RSP

except

(that

is,

bit 3 of

one

data

or

byte

of

the

To

prevent a protocol

any

command

If

a bootstrap

during

end

packet

end

packet,

packets.

transmission

the

switch

byte

will

error

from

If

a

is

being

to

the

byte

was

previously

(whichever

not

be

transmitted until a

occurring,

protocol

error

transmitted,

host.

When a command

cleared

occurs

first).

it

is

necessary

is

detected,

however,

or

cleared

The

subsequent

Continue

to

transmit

continuous

no

handshake

packet

during

bytes,

or

an

Continue

INITs are

is

employed.

specifies

power

up

to

XON

is

or

sent

.

3.2.5 The

end

End

packets

shown

End

packet

in

Table

Packets

is

sent

are

sent

3-3.

to

the

using

host

by

the

ru58

after

completion

RSP

or

MRSP

Table 3-1 Data Packets

Byt~

o

1

------------------

2

3

M

M+

as

specified

"

1

by

Byte Contents

Flag = 0000

Byte Count = M First Data Byte

Data

Data Last Data Byte

or

termination of

the

last

- - - -- ------ - - - --

M+2 M+3

ChecksumL ChecksumH

command

0001

..

- -

an

operation

packet.

The

or

end

an

error.

packet

is

Table 3-3 End Packet Byte

o

1

Byte Contents

Flag - 0000 00 1 0

Byte Count = 0000 1010

--------------,..---

--

10

11

12

13

3 4

5

6

7

8

9

2

-

--

Op Code - 0100 0000 Success Code Unit Not

Used

Sequence No. L

Sequence No. H

Actual Byte Count L

Actual Byte Count H Summary Summary

- - - - - - -

ChecksumL ChecksumH

3-5

Status L Status H

---,-

The definition of bytes

are defined Byte

2

Byte

3

Byte

4

as

follows.

0,

1,

12,

and

13

are the same

Op

Code

- 0100

Success Code Octal 0

1 377 376

370 367 365 357 340 337 320 311

Unit Number 0 or 1

Decimal

-11

-17

-32

-33

-48

-55

0000

0 1

-1

-2

-8

-9

for

drive number.

as

for

the

command

for

end

packet

Normal

=

Success but

=

Failed self test

==

Partial operation (end of

=

medium)

Bad

-

No cartridge

-

Write protected

==

Data check error

-

Seek error (block

==

Motor stopped

==

Bad

-

Bad

==

success

with

unit number

opcode block

number

packet. The remaining

retries

not

found)

(>

511)

bytes

ByteS Bytes

6,7

Bytes

8,9

Bytes

3.3

The op serial

Instruction

10,11

INSTRUcnON SET

operation

code

protocol

byte

set

performed

in

with

op

AlwaysO. Sequence number Actual byte count - number of bytes handled

ation, this

Summary Status

Byte

Bit

Byte

Bit

by

the

TU58

the control packet

the

code

switch

byte

byte, the

assignments

is

the same

10

0

•

7

11

0

1

2

3

4

5

6 7

when

message.

response

are

always 0 as

as

the data byte count

Reserved

Logic Motion

Transfer error

Special condition (errors)

it

receives

Note that

will

listed

in

error

a Control

while

not

be

Table

in

command packet.

(command)

any

command

MRSP if a

3-4.

in

transaction. In a

in

the command packet.

boot

packet can

operation

is

determined

specify

is

being

<good

modified

performed.

oper-

by

the

radial

To

allow

for

future

mands and

have

result

unpredictable results

in

the return of

development,

an

end

certain

and

should

packet

op

not

with

codes

be

used.

the "bad

3-6

in

the

command

Op

op

codes

code"

set

not

listed

success

have

in

code.

been the

command

reserved.

These

set

are

com-

illegal

Table 3-4 Instruction Set

OpCode OpCode

Decimal

0 0 NOP

1 1 INIT

2 2 3 3

4 4

5 5 Position

6 6

7

8 9

10

11

Octal

7

10

11

12 13

IDstruction

Read Write (Reserved)

(Reserved) Diagnose Gctstatus Set status (Reserved)

.

(Reserved)

Set

The following is a brief description and usage example

OP

CODE'O

This instruction causes the TU58 to return an end packet. There are packet is shown below.

BYTE

0

1

2 3

4

5

NOP

0000 0000

0000

0000 0000 0000

0000

0010

1010

0000

OOOX

0000

6 0000 0000

7 8 0000 0000 BYTE

9

10

11

12 13

The TUS8 returns the following end packet.

0000

0000 0000 0000 0000 0000 0000 0000

0 0000

1

2

0000

0100 0000

3 0000

4

S

6

7 8

9

10

11

12 13

0000

0000 0000

0000

XXXX

ooox

XXXX XXXX

0000

0000 00IX CHECKSUM.L

1010

0010

1010

0000

OOOX 0000 0000 0000 0000 0000 0000 XXXX XXXX

<

FLAG MESSAGE

OPCODE

MODIFIER UNIT

SWITCHES

SEQ

BYTE BLOCKNO.L BLOCKNO.H

CHECKSUMH

FLAG

MESSAGE BYTE OPCOPE SUCCESS UNIT NOT SEQ.L SEQ.H

..

ACTUAL BYTE

SUMMARY STATUS L

SUMMARY STATUS H

CHECKSUML CHECKSUMH

NUMBER

NO.

(NOT

NO.

(NOT COUNT COUNT

(IGNORED)

USED

....

of

each.

BYTE

.

CODE

CNT

(IGNORED)

(NOT

USED) USED) USED)

L H INVOLVED

CNT

L

CNT

H INVOLVED

no

modifiers to NOP. The

NO

DATA

NO

TAPE

POSITION

NO

DATA

NOP

3-7

OP

CODE 1 INIT

This instruction causes the

this operation.

from ant change to the reinitializing itself. There are

OP

CODE 2

This instruction causes the

designated by the block number bytes. reading until the byte count (command bytes 8 and 9) is satisfied. After data has been sent, the

sends an end packet. Byte 3 indicates success, success with retries, or failure

of

event

packet is recognized by the host by the flag byte. The host sees a command flag a data flag

failure, the end packet is sent

(0000 0001).

The

low

Read,

TU58 controller to reset itself to· a ready state.

command 'packet

order checksum byte. The TU58 sends the same end packet as for

no

modifiers to

and

Read

with

TU58 to position the tape in the drive selected by Unit Number to the block

is

tbe same as for

Decreased

It

reads

at

the time

IN

IT.

Sensitivity

data

of

failure without filling up the data count. The end

NOP

starting

except for the op code and the result-

at

the designated block and continues

No

tape positioning results

NOP

of

the operation. In the

(0000 0010) instead of

after

TU58

There are two modifiers to the read command. Setting the least significant bit TU58 to read the tape with decreased sensitivity in the read amplifier. This makes the read amplifier

data

miss

healthy. The read transaction between TU58 and host is shown for 510 bytes (just under a full block) in

Figure

3.2.3.1 and 3.2.3.2.

if any weak spots are present. Thus, if the TU58 can read error-free in this mode, the data

3-1.

Setting the most significant bit

COMMAND

(READ

HOST

PACKET

510

BYTESI

of

byte 3 to 1 selects special address mode. See Paragraphs

TU58

I

..

~

.

•

,I

•

128

,,I

128

12BBYTES

DATA I

BYTES

DATA

BYTES

I

DATA

I

of

byte 3 to 1 causes the

is

I I

•

..

I

126

DATA

BYTES

I

OP

CODE 3 Write, and Write

This op code causes the TU58 to position the tape in the selected

10,11

of

number in bytes

It

writes data from subsequent data packets into one or more. blocks until the byte count called out in

bytes 8, 9 of the command packet has been satisfied. The controller automatically zero-fills any remaining bytes

the command packet and write data from the first data packet into

Figure

and

3-1

Read

..

Read

Verify

II

END

I

C()mmand

3-8

I

_.378

Packet

Exchange'

driveto

ina

512-byte tape block.

.

the

block

specified by the

that

block.

There are two modifiers pennitted with the write command. Setting the least significant bit

to

1 causes the TU58

3

decreased sensitivity and test the checksum

TU58 sends an end packet with the success code set

to

data). Failure

read correct data results in a success code

error. Setting the most significant bit

to

write all

of

the

data and then back

of

each record.

of

byte 3

to

up

and read the data just written with

If

all

of

the

checksums are correct, the

to

0 (or 1

if

retries were necessary

of -17

(357

)

8

to

indicate a hard read

1 selects special address mode. See Paragraph

3.2.3.2. . .

of

byte

read the

The write operation has to cope

with

the fact that the TU58 only has 128 bytes

of

buffer space.

It

is

necessary for the host to send a data packet and wait for the TU58 to write it before sending the next data

is

packet. This

accomplished using the continue flag. The continue flag

0000 from TU58 to host. The RSP write transaction for both write and write/verify operations Figure 3·2. The

MRSP write transaction for

HOST

COMMANO

PACKET

WRITE

620,

BYTES

DATA

128

BYTES

OATA

128

BYTES

DATA

128

BYTES

DATA

128

BYTES

DATA

108

BYTES

both

write and write/verify operations

russ

..

CONTINUE

..

TAPE

POSITIONS

AND

WRITES

OATA

..

CONTINUE

..

TAPE

POSITIONS

AND

WRITES

DATA

..

CONTINUE

..

TAPE

POSITIONS

AND

WRITES

DATA

..

I

CONTINUE

..

TAPE

POSITIONS

AND

WRITES

DATA

•

CONTINUE

I

..

TAPE

POSITIONS DATA. TU58 ZERD-FILLS REMAIN· ING

404 VERIFY. B

LOCKS

CHECKSUMS.

BYTES

TAPE

JUST

ANO

OF

BLOCK.

REWINOS

WRITTEN

I

is

a single byte response of 000 1

is

shown

WRITES

IF WRITEI

AND

READS

AND

TESTS

is

shown in

in

Figure 3·3.

Figure

3-2

..

RSP

Write

I

ENb

SUCCESSIFAILUR~

I

MAo2S77

Transaction

3·9

I

HOST

CONTINUE

COMMAND

PACKET

WRITE

6108YTES

DATA

1288YTES

CONTINUE

DATA

1288YTES

..

I

•

I

..

SEND THE

IS

AFTER

CONTINUE

..

TAPE AND

CONTINUE

..

TU58

"CONTI

FOLLOWING

NOT

THE SELECTING

POSITIONS

WRITES

NUl!"

FIRST

DATA

HERE

ONLY IF

COMMAND

MRSP.

PACKET

Figure

CONTINUE

DATA

1288YTES

CONTINUE

DATA

128

BYTES

CONTINUE

3·3

MRSP

..

I I

•

II

I I

Write

I

..

SUCCESS/FAILURE

Transaction

TAPE

POSITIONS

AND

WRITES

DATA

CONTINUE

TAPE

POSITIONS

AND

WRITES

DATA

CONTINUE

WHEN

USING

END

REQUIRES

FROM

MRSP.

THE

TRANSFER "X-ON"

REMAINING 8YTE

148YTES

I

AN

HOST

END

PACKET

''CONTINUE''

BEFORE

MA·10.a3

OR

EACH

3-10

OP CODE 4 (Resened) OP

CODE 5 Position

This

command

11.

After

OP

CODE 6 (Reserved)

OP CODE 7 Diagnose

This

command

and

RAM.

Fail).

Note that if the bootstrap hardware

handshaking

OP

CODE 8

This

command

OP

CODE 9 Set Status

This command

end

an

OP OP

packet.

CODE 10 (Resened) CODE

causes

reaching

causes

Upon

even

Get

is

11

(Resened)

the

TU58

the

selected

the

TU58

completion,

if the

switch

Status

treated

as

to

block,

to

TU58

byte

position

run

specifies

tape

it

sends

its internal

sends

an

option

on

the selected

an

end

diagnostic

end

packet

is

selected,

MRSP.

a NOP. The TU58 returns

a NOP because

TU58

status cannot

packet.

with

an

end

drive

See

Paragraph

program

appropriate

boot

information

packet.

be

to

set

the

block

which

success

from

designated

3.2.3.2.

tests

will

be

the

host.

the

processor,

code

(0 = Pass,

transmitted

The

by

bytes

TU58

10,

ROM,

-1

=

without

returns

PASCAL TUS8 HANDLER ALGORITHM

3.4

The

following

collection of algorithms describes the basic functions required system. These algorithms are written illustrate the software examples

1.

logic

of operations

for

a particular

found

in

tudiagnose - Constructs and

host

Appendix

involved

computer

C.

The

built-in, self-test diagnostic. Returns the

2.

tuseek - Constructs and sends the command packet

in

tape inserted from

the TU58

3.

turead - Constructs and the tape TU58

4.

tuwrite - Constructs and from

end packet

the buffer area specified

obtained

In addition

to

the

routines are shared

in

from

above

by

the specified drive

end

packet

sends

the specified drive into a buffer area. Returns the

as

the result.

sends

the TU58

end

specific functions, algorithms

the TU58 function routines and are included

DEFINmONS

in

a pseudo-Pascal language and are therefore

in

causing the TU58

may

be

written

following

sends

is

a list of the functions described.

the command packet causing the TU58 to execute its

TU58

to

the specified

as

the result.

the command packet

to

perform the intended function. Actual

using

these algorithms

end

packet success

which

block.

which

causes the TU58

Returns the'success

causes the TU58 to.read data

success

the command packet to

the specified TU58 tape unit. Returns the

packet

as

the result.

for

which

causes the TU58

supporting routines are

for

the sake of completeness.

for

along

code

using

only

with

as

the result.

obtained

also

the TU58

designed

the program

to

position

code

obtained

from

to

write data

success

provided.

in

to

the

from

the

code

These

a

Digital Equipment Corporation assumes offers corrections should errors

by

any

system

suitable language implementation.

no

responsibility

be

present. These algorithms

3-11

for

the correctness of these algorithms,

may

be

copied

for

use

on

any

nor

computer

CONSTANTS

{

Define

(Defines

single

some

byte

interesting

packet

flags

and

}

useful

constants

)

data control

init continue xoff

{

Define

read.opcode write.opcode positlon.opcode

diagnose.opcode

end.pack.opcode

(

Define

success failure

{

Define

co~mand.flag

command.count = command.opcode =

co~mand_unit

data.count.low data.count.hiqh command.block.low = 10;

command.block.hi9h = 11;

multi-byte

initialization

some

1;

=

2;

=

4;

=

16;

=

19;

=

2;

=

3;

=

5;

=

7;

=

64;

=

0;

=

-127;

useful

=

0,

1; 21

=

4;

=

8;

=

9;

packet

sUbscript

opcodes

success

}

codes

values

)

}

(

Define

command.length data.block

GLOBAL.VARIABLES

slngle.byte.packet

( Note Its sent, message )

multl.byte.packet

CALLING.PARAMETERS { Parameters

unit.number,

no.bytes

buffer:

length

the

length

i.e.,

of

command/data

= 10;

=

128;

(Indicate

:

byte;

variable is a function

N

is

block.number

:

INTEGER; ( Number

ARRAY[l

length

the

number

:

ARRAY[O

••

no.bytes]

quantities

messaqes

of

the

of

the

type

of

bytes

••

N+31

defined

:INTEGER; {

of

bytes

OF

byte; ( Data/message

used

array

of contained

OF

byte;

by

the SpeCified

in

}

by

all

defined message

calling

message )

functions

below. to

be

in

the

routines}

unit/block}

space)

}

3-12

tudlagnose,

«

This

routine

BEGIN

«

Construct necessary to Return contained

IF

inltiallzeCdiagnose.opcode)=success

ELSE

END,

«

tudiagnose

runs

the

TU58

execute

the

and send to

cause its value

In

the

the tne

self-test

of TU58

send.packet(packet,

tudiaqnose

END

tudiagnose

:=

qet.end.packet

:=

failure

•

self-test

command TU58

diagnostic

pac~et

controller

diagnostic.

the

success

end

packet

code

••

command.length+2),

THEN

routine

BEGIN

}

tuseek

«

Coristruct TU58 block. the

TUS8

BEGIN

IF

ELSE

END,

turead

« tUleele }

(unit_number,

and send a

should

This

end

POSition

routine packet

block.number),

command. the returns

~s

its

p,cket

specified

the

result

succe~s

••

Initiallze(posltion.opcod.)=success

«

Construct/send

packet packet packet

[command.unltl [command.block.lowl [command.block.hlgh]

send.packet(packet,

« Conclude

tuseek

END;

tUleek

with

:=

get.end.packet,

:=

failure,

(unit.number,

blocle~nUmber,

a

command

:=

unit.number;

command.lenQth);

an end

packtt

which

unit

Indicates

to

the

code

THEN

specified

sent

8EGIN

paCket •

:=

10W(block.number),

:=

highCbloCk.number),

)

buffer,

no.bytes),

tne

in

«

Constuct

'no.bytes' from the

succels

the

and send

from

tape

the

into a buffer

code

the

contained

BEGIN

IF

initiallze(read.opcode)=success

(

Construct return

packet

low

[command.unitl packettcommand.block.lowl packet

[command.block.highl send.packetCpacket,

command

unit

and

comllland·

byte,

packet

block

space,

in

t~e

required specified. returning

TU58

end

THEN

packetr

high

:=

operators

byte

respectivelY.

unit.number,

:= 10W(block.numDer);

:-

hiqhCblock.number),

command.lenQth);

3-13

to

Reads

the

packet

BEGIN

'low',

read value

••

'high'

data

of

( Get If ELSE

END ELSE

turead

END; { turead

data

output

and

stutf

In

get_data_packet(buffer)=success

turead turead

:=

:= :=

failure

get.end_pac~et

failure

}

buffer

THg~

)

tuwrlte (

Construct unit the success

(unit.number,

and

block

specified

code

obtained

result.)

LOCAL.VARIABLES

count,

data.count

BEGIN

IF

lnltlallze(wrlte.opcode)=success

(

stuff

packet[comm'41nd.unltJ:= packet[command.block.lowl packet send.packet(oacket,

{

If

continue

'put.byte'are

calls data.count wHILE

count

data.count

END:

block.number,

send a command

for

writing

buffer

area

to

from

:

INTEGER;

parameters

packet

data.

t~e

the

into

bufter,

specifying

write

tape.

TUSS

end

command

no.bytes);

the Return packet

THEN

packet

tne

data

the

as

BEGIN

)

from

the

unlt.number;

:=

low(block.number);

(command.block.highl

:=

hlgh(block.number);

command.length);

Is

received,

Implementation-dependent

send

data;

'qet.byte'

function

}

:=

no.bytes

qet.byte=contlnue

{

~ake

bloCkS

:=

mlnimum(data.count,

THEN

maximum

Of

DO

128

AEGIN

bytes data.block);

eacn

put_byte(count), send_P8cKet(buffer[no_bytes-data_count+11,

count);

:=

data.count

-

count

}

{

In

any

event,

tuwrlte

:=

END

ELSE

EhD;

(

tuwrite

Initialize (

Initializes communication for

INlT transmitted or

the

first

tuwrlte

(oP.code)1

sent

:=

)

the

TUSS

llne,.followed twice.

to

the

(command)

BEGIN

(

Set

communication

try

for

get_end_packet

failure

by

sending

by

The

specified

TUSS

as

byte

line

either

of a multI-byte

control

an end

break

the

single operation

a

single

to

3-14

packet

characters

byte byte

packet.

BREAK

}

at

end }

on

pac~et

Is

then

packet

the

}

(

Delay

error

multIple

)

Character

walt(n.Character.tlmeS)I

(

Remove

BREAL

condltion

tIme

from

to

line

insure

•

framlnq

reset.brealc.bi {

Initialize

packet

[command.flaQ]

packetlcommand.oPcodeJ ( Send INIT slngle.byte.packet

Put.byte(sinqle.byte.paCket" IF

Qet.byte=eontlnue

ELSE

initialize

END, « lnitialize send.packet

( Send

LOCAL

information

...

VAR

1ndex,

(buffer,

!ABLES

check.sum,

BEGIN

( Must

begin

cneck.sum check.word

:=

1=

flag

wlth

0;

command

)

tI

packet

to

TUSe

1=

THEN

:=

fallu'Tel

nO.bytes);

contained

cheCK.word :

CheCksum

0:

:=

control;

:=

inlt;

in

area

)

op.code;

)

Initialize

'buffer'

INTEGER,

initialIzation

:=

to

success

TU58

)

( Check

1f

even1

of

TRU~

FOR

for if

index

IF

odd(lndex)

even/odd

the

operator

the

:=

1

arqument

TO

check.word

ELSE

BEGIN check.word check.sum

END;

put.bvte(buffer[lndex]) END;

IF

Odd(no.bytes)

check.sum

{

Now

output

'high'

return

THEN

:=

cheCksum

low

put_byteClowCcheCK_sum»,

Put.byte(high(check.sum)

E~D'

(

send.packet

)

bytes,

'odd'

performing

returns

15 odd )

no.bytes

DO

BEGIN

THEN

:=

bufferlindexl

1=

butfer[indexl*256

:=

check(check.sum,

cneck(check.sum,

information;

byte,

hlg~

byte

3-15

cnec~sum

a

Boolean

+

cheCk.word,

cnec~.wqrd)

check.word>; operators

respectively}

only

value

'lOW',

get.data.packet

(buffer),

( Gets

the

~buffer~

data

}

LOCAL.VARIABLES

index,

checK.sum,

BEGIN

(

Initlalize

check.word check.sum

(

LOOk

fdr

IF

(check.sum<>data)

ELSE

8EGIN

( Get

Checksum

:=

get.byte,

valid

data

checksum

data.count check.sum

FOR

Index buffer[index] IF

odd(index)

check.word':.

ELSE

check.word Check.sum

END

sent

from

0,

data

packet

al

the

:=

get.byte;

I.

check.sum +

:=

1

BEGIN

the

data.count

variables

packet

THEN

get.data.packet

from TU58, butfer

TO

data.count

:=

get.byte,

THEN

bUfter(lndex]

:=

buffer(lndexl*256

:=

check(CheCk.su~,

TU58

and

stuffs

:

INTEGE~J

)

structure

calculatlno

Is

being

data.count*256;

DO

BEGl~

it

)

:=

filled

check.word)

into

failure

)

+ checkword,

IF

odd(data.count)

Check.SUM

(

Make

sure

check.word check.word

IF check.word<>check.sum

get.data.packet

ELSE

get.data.packet

END

get.end.packet;

(

Get.

as

an end pacKet from

result)

LOCAL.VARIABLES

index,

BEGIN

check.sum

« Look

Check.sum~

.

for

:=

get.byte,

valid

IF (check.sum<>command)

OR

(get.byte<>end)

TH~N

:=

Check(Check.sum,

packet

:=

get.byte;

:=

CheCK.word +

was

the

check.word

command

check.word),

not

In

error

)

get.byte*256J

THF.N

:=

failure

:=

sut~ess

TUSS,

packet

OR

THEN

returning

I JNtEG£RJ,

structure

success

}

(get.byte<>command.length)

get.end.packet

:=

code

failure

3-16

ELSE

BEGIN

{ Get

success

co~e

from

command

packet

)

get_end.packet

{

checK.sum

FOR

END;

«

cneck.word check._ord

IF check.word<>check.sum

END

END,

check

( Computes

around

BEGIN

«

(

(argl,

The 1

if

a

carry;

Now

do

the

:=

Index

:=

check.word checK.word check.sum

MaKe

sure

:=

get.end.packet

ar92),

the

16

bit

carry

technique

function

the

sum a

'carry' of

value

:=

get.byte,

cheCKsum

calcUlatlon

checK(check.word,

1

TO 4 DO

:=

packet

check.word + get.byte*256,

check(check.sum,

BEGIN

get.byte,

was

not

get.byte, check.word

+

get.byt~*256'

THEN

,:

failure

)

checksum

Of

of

TUS8 )

argl

returns a value

the

arguments

Of 0 is

returned

)

get.end.packet*256);

check.word)

in

error

and

)

ar92,

of

results

in

otherwise

using

)

end-

END;

Check

{ check}

{

:=

argl + arg2 + carry(argl,arq2)

End

of

algorithm

definitions

•

3-17

CHAPTER 4

INSTALLATION

4.1 INTRODUCfION This chapter contains installation, configuration, and checkout procedures for all the versions of the TU58 DECtape II (-DA, -CA, -EA, -EB, -VA components).

4.2 RACK INSTALLATION (-DA Version)

4.2.1 Rackmount TU58-DA mounts in 13.2 cm (5.1 in) of standard 48.3 em (19 in) width rack.

The so

that the'2 m (6

any power outlet.

4.2.2 Unpacking

The TU58-DA shipping carton contains the following items for rackmounting.

ft)

power cord can reach a power controller outlet box such as the DIGITAL

1 TU58"EB

1 Bezel

2 Mounting brackets

Support brackets

2 2

Support bracket extenders Phillips trusshead screws 10-32 X

24 24 Internal lock washers

12

U-Nut retainers

6

Keplocknuts

1 Line cord (120

2 Fuses

(3/8

10-32 X

V)

A and

3/4

3/8

A slow-blow)

1/2

in

It

should

be

located

861

or

4.2.3 Power Selection

Detachable line cords for cord receptacle meets European lects 115 V or 230 V (Figure 4-1).

1.

Set the voltage switch to the correct value using a small screwdriver.

115 V and 230

Switch

Position Left Right

If

the TU58 is plugged into a 230 V circuit while set

for 115

V,

and two fuses are supplied with the TU58-DA. The line

IEC

standards. A switch

Voltage

115V

230 V

CAUTION

V,

it may

be

severely damaged.

4-1

on

the back of the tape drive rear panel

Range 90-128

180 - 256 Vrms

Vrms

se-

FUSE

POST

120/240V INTERFACE CABLE CABLE SHIELD

SWITCH CONNECTOR GROUND

SCREW

FUSE

POST

120/240V INTERFACE CABLE CABLE SHIELD

SWITCH

CONNECTOR GROUND

\.

SCREW

000

POWER

SWITCH

(A) NON·FCC COMPLIANT CONFIGURATION

2.

From the two fuses provided, select and

fuse post, use a 3/16-inch blade type screwdriver:

Figure

(B)

4-1

TU58-DA Rear Panel

instaH

POWER SWITCH RECEPTICAL

LINE

CORD

FCC

COMPLIANT CONFIGURATION

the proper fuse

Press in the fuse post cap and turn it

000

in

the fuse post. To open the

counterclockwise. To close the fuse post, use the screwdriver to press in the cap and turn it clockwise.

4.2.4

The TU58

Removing

is

shipped prewired for operation at 38.4K baud transmit and receive on RS-423. If a

figuration change

Voltage

115V

230V

Bottom

is

Plates

for

necessary, the bottom plates must be removed

Fuse

3/4 3/8 A slow-blow

Controller

A slow-blow

Board

Configuration

in

order to gain access to the controller board. Use the following procedure to remove the bottom plates. (See Paragraph 4.7 for figuration information.)

MA~7e3().a3

concon-

1.

Disconnect the power cord and interface cable from the rear panel of the TU58 (Figure 4-1).

2.

Place the TU5S upside-down on a flat working surface

3.

Remove the two Phillips head screws and lock washers from the front plate. Remove the

so

the rear panel faces you.

front plate, exposing the two tape drives.

4.

Remove two Phillips head screws and lock washers from the bottom of the rear plate and one

Phillips head screw from the rear panel at the left side of the interface cable connector.

flat Remove the power supply assembly by lifting it out of the housing (with internal cables still

TU5S.

4.2.5

attached) and placing it rightside-up next to the

Rackmounting

Procedure

The following procedure enables one person to install the TU58-DA in the rack using a number 2 Phillips screwdriver.

1.

With the power cord and interface cable removed (Figure 4-1), carefully place the TU58-DA upside-down on a flat working surface

2.

Remove the rubber feet if attached by removing the screws that hold them

4-2

4-1). Refer to Figure

so

they are flush with the left side. Fasten

two

screws and two lock washers.

and align the

so

the front of the device

two

support brackets on the bottom of the TU58-DA

down

the right side of each support bracket with

is

facing you.

in

place (Figure

4-2

Figure

3.

Fasten the mounting bracket to the left side of the TU58-DA with two screws and two lock washers the other mounting bracket in the same manner using lock nuts to secure it to the support brackets (Figure 4-3).

4.

Attach four U-Nut retainers (two per side) to the front vertical rails (Figure 4-4). Refer to Figure

5.

Open the back of the rack. Attach four U-Nut retainers to the rear vertical rails (Figure 4-6).

6.

If

with four screws, four lock washers, and four lock nuts. tom holes (Figure 4-7).

7.

Turn the TU58-DA rightside-llpand while supporting it with one hand, place it into position in the rack.

so

the ball stud faces forward (bend in bracket toward center of TU58-DA). Install

4-5

and position U-Nut retainers

a non-DIGITAL rack is used, fasten the support bracket extenders to the rear vertical rails

4-2

Installing Support Brackets

at

the desired height for the TU58-DA.

two

screws,

Use two per side in the top and bot-

two

lock washers, and two

NOTE

Be

sure

the

mounting

the

rear

vertical

8.

Fasten the mounting brackets to the front vertical rails with four screws and four lock washers (two per side in the top and bottom holes).

brackets are to

raus.

the

inside of

Install the

mounting

9.

For DIGITAL racks, fasten the mounting brackets to the rear vertical rails (Figure non-DIGITAL racks, fasten the mounting brackets to the support bracket extenders (Figure 4-7).

10.

Attach the power cord and interface cable and connect to the appropriate device or receptacle. Close the back of the rack.

11.

Install the bezel by pushing into place over the ball studs (Figure

the

two

bottom

earL

CAUTION

screws

first

4-3

to

avoid

bending

4-8).

4-6).

For

Figure

4-3

Installing

Mounting

Brackets

MA-1472

Figure

4-4

Front

Vertical

4-4

Rail

U-Nut

Retainers

2.22

(7/S:

1.59

(5181

8.04

2.88

(23181 (11181

1.59

(5/SI

T

13.2

(5.191

4.78

(17181

L_

VERTICAL RAILS

SALLSTUD

FRONT

L~

·SUBJECT

MEASUREMENTS ARE IN

Figure

4-5

____

1j.-·-----:r:3~51-----eoI·1

10----(17.151----01

TO

INCHES.

Rackmounting

44.6

Io----~

CHANGE

ARE IN CENTIMETERS

the

EXCEPT

TU58·DA

----4~

~~1~~1

I

c:=:::J

c:::::J

• _ 13.2

48.3

----...I

(19.01

VALUES IN

U T

(5.191

PARENTHESES

4-5

REAR

VERTICAL

SUPPORT

Figure

4-6

MOUNTING

Rear

REAR

VERTICAL

BRACKET

Vertical

SUPPORT

Support

U-Nut

MA·8417'

Retainers

Figure

MOUNTING BRACKET

4-7

Fastening

SUPPORT

EXTENDER

Support

4-6

BRACKET

Bracket

Extenders

Figure

4-8

Installing the Bezel

4.3 'RACK INSTALLATION(-CA Venion)

4.3.1 Rackmount The TVS8-CA rackmount unit mounts in 13.2 cm should be located DIGITAL

861

so

that

the 2

m(6

or any power outlet.

ft) power cord can reach a power controller outlet box such as the

(5.2

in)

of

standard 48.3 cm (19 in) width rack.

It

To get to the mounting holes, remove the bezel (Figure both hands. Rotate it out from the bottom and lift it away. bezel may be removed by gripping it with both hands on the left edge with fingers or thumbs inside the storage well. Pull sharply out and swing the bezel away.

If

the rack requires them, install four V-Nut retainers

TVS8 is light enough for one person to install.

mounting ears.

Metal

4-9) by gripping

lethe

unit is installed in a recessed rack, the

WARNING

bezels

are

heatry!

at

the holes spaced according to Figure 4·10. The

Put

the two bottom screws in first to avoid bending the

" ,

it

at

the top and bottom with

4-7

--

Figure

Four brackets and hardware are included with the TU58-CA to support the back end of the chassis in a

rack.

Use the two long brackets for DIGITAL cabinets. The short brackets are extenders for the brackets used in non-DIGITAL er

supply screws, and attach to the side rails of the rack with the supplied clipnuts and screws. Hardware is also provided to fasten the extender to the long bracket bracket should point to the center of the rack while the bend of the rack.

4.3.1 Power Selection for the Rack Version

Une

cords for 110 V and 220 V and two fuses receptacle meets European Vor

220 V (Figure 4-11).

1.

. Set the switch to the correct value using a small screwdriver.

2.

Install a fuse in the fuse post.

lEe

If

the unit is

for 110

A 3/8

3/4

Amp

4-9

Bezel

and Ball Stud

cabinets~

Attach the long brackets to the chassis with the existing

are

standards. A switch

CAUTION

plugged

V,

it

may

be

Amp

'slow-blow

slow-blow fuse for 110 V.

on

into a 110 V circuit

severely

NOTE

fuse is

long

pow-

if

required. The bend

on

the extender should point to the outside

supplied with theTU58-CA. The chassis power

the back

damaged.

required

of

the rackmount cabinet selects 110

while

set

for 220

V,

a

on

the long

3.

Insert the appropriate power cord into the receptacle. installation

is

complete.

4-8

Do

not plug it into an outlet until the

FRONT

VIEW

8.04

(2318)

2.22

17181

1.69

(5/8)

2.88

(1118)

1.59

(5/81

L

'0

4.78

(1718)

-

t-

_______

1ot--------(19.0)--------.I

-T-

TOP

OF

BEZEL

WIDE

NARROW WIDE

WIDE

BOTTOM

OF

BEZEL

-~-

•5 --------./

48

(1B.31

FRONT

OF

BOX

(BEZEL

48.3

REMOVEDI

0.95 (0.375)

o

@

o

e

Figure

-r-~--~------~~

13.2

(8.181

~--------~------------~

,..1·------'~~5)-----.l·1

14-

______

44•5

·---.:...-----.11

(17.5)

rr~~~~'~uT

(18.0)~

·SUBJECT

TO

4--10

CHANGE

Rackmounting

101-----.....;...-"--(19.0'----:...----.1

the

TUS8-CA

FRONT

~

~~~~)

•

48.3

i

I

..

--

4-9

CABLE

SHIELD

GROUND

•

_.

110/220 V

SWITCH

SCREW

o

FUSE

POST

Figure

m~

4-11

LINE

CORD

RECEPTACLE

TUS8-CA Rear Panel

4.3.3 Remofing Module from Chassis Refer to Figure 4-12 and perform the following steps.

1.

Disconnect the power cord.

2.

Remove the bezeL

3.

Twist a coin or screwdriver in the gap between the retainer bar and the lip

of

the bar out

4.

Pull the cage toward you a few inches and two and reach in

the chassis and set it aside.

tum

at

the back of the cage to remove the power and communication cables from the module connectors. Remove the cage entirely from the chassis and put it on a stable work surface.

INTERFACE

O

CABLE CONNECTOR

..

it to the right. Slide

of

the chassis. Lift

the

module out an inch or

5.

Reach in again

at

the back

the module.

6. Now slide the module

Be

careful around the

Oy

bent (and its edge is sharp).

without pliers. Alignment is not critieai, but disk does it

cannot

replaced.

4.3.4 Reinstalling the Module

1.

With the connector edge facing into the cage, slide the module partially into the cage along the card guides.

2.

Install the drive cables onto their connectors. Note that the drive cables cross each other,

with the left drive cable going to the right connector (as you look into the open end of the cage).

of

the cage and remove the drive cables from their connectors on

out

of

the cage.

CAUTION

tIain

tachometer disk.

If

the disk gets bent

creasing,

it

might be straightened with

it

Dot

I'iIb against the optical sensor block.

be.

aligned;·

or

if

it is creased, it must be

.

It

is better

is

if

eas-

the

If

4-10

Figure 4-12 Installing Cage and Retainer Bar

3.

Place the cage partially in the chassis and run the power and communication cables up to the module onto their connectors.

4.

Slide the module all the into the bottom of the chassis.

5.

Align the retainer bar parallel to the floor of the chassis, with the spring on top. Engage the two

slots with the vertical sheet metal of the cage end of the bar away and the bar holds the cage in place in the chassis. The module should sit in the cage with its edge

just clear of the retainer bar springs.

6.

Replace the bezel and power cord.

way

into the cage and set the cage into the hooking tabs stamped

at

the middle of the cutaways. Press each

down, one

at

a time,

so

that the ends catch the lip of the chassis and

4-11

4.4 INSTALLATION (-EA AND -ED VERSIONS)

The TU58-EA and cords

for

115

are supplied

with

or a convenient location within reach of a

V and

the

-ED

are tabletop units that require a minimum amount of space. Detachable

230

V and

-EA.

two

fuses

The cords are 6

are supplied

ft

long,

enabling

power

outlet. See Paragraph

with

the

TU58-ED;

you

to place the TU58

4.2.3

tion information and Paragraph 4.2.4 for controller board configuration.

4.4.1 Tabletop Installation

1.

Disconnect the

power

cord and interface cable

from

the rear of the TU58 (Figure

only

the

115

on

for the correct

line

V cord and

fuse

a desk, tabletop,

power

selec-

4-1).

2. Place the TU58

upside-down

3. Install the four rubber feet them to the bottom plates (Figure 4-13).

4.

Tum

the

TU58

5.

Connect the power cord, interface cable, and

4.4.2 Solid Mounting Installation

1.

Perform steps 1 and 2

2.

Install the four mounting brackets (bend

1.3

cm

(I/2

rightside-up and place

as

in) Phillips head

(Figure 4-13).

3.

Turn the TU58 rightside-up and place

on

a flat

working

usingthefour~

iiin

surface.

. .

1-.3cin -(1/2

the desired location.

cable

above.

screws

facing

and

it

the side

lock

washers

in

the desired location.

shield

in)

Phillips head

wire

to the rear panel.

of

the TUS8 housing) using the four

to

secure

them to the bottom plates

screws

to

secure

Figure

4-13

Mounting the TU58-EA and

4-12

MA-6471

-ED

,

4.

Fasten the unit to the mounting surface using four screws through the holes of the mounting bracket bends.

NOTE The four screws needed to secure the unit to the mounting surface are not supplied with the

TUS8.

5. Connect

the

power cord, interface cable, and

4.5 INSTALLATION (-VA VERSION) The TU5S-VA convenient location within reach In addition, the

is

a tabletop unit that requires a minimum amount of space and can be placed

of

a dc power source. (See Paragraph 1.4.2 for power requirements.)

TU5S-VA can mount to the

If

reconfigiJration

before installing the TU58-V

4.5.1 Tabletop Installation Paragraph 4.4.1 for installation procedure.

See

4.5.2 Solid Mounting Installation Paragraph 4.4.2

See

4.5.3 Mounting the TU58-VA to the

1.

Attach the four rubber feet to the TU5S-VA as described

4.

(If

2.

Place the

.for

installation procedure.

solid mounting

SBll

(or BAll-VA) upside-down

SBll

is

desired, order hardware kit

cable.

shield wire

SBll

(or BAll-VA) if

so

NOTE

Is

necessaryt see Paragraph 4.2

A.

(or BAll-VA)

in

Paragraph 4.4.1, steps 1 through

PN

70-16753-00).

on

a flat working surface.

to

the rear panel.

desired.

in

a

3.

Remove the rubber feet from the SBl1 (or BAl1-VA) if attached by removing the screws

on

securing them to the bottom. Fasten the four brackets to the bottom (bend

the outside

edge) using four screws and lock washers (Figure 4-14).

4.

Position the line up with the holes on the side of the

SBll

(or BAll-VA) rightside-up over the TU58-VA

TU5S-VA. Fasten to the TU58-VA using four screws

so

the mounting brackets

and lock washers (Figure 4-14).

5.

Referring to Figure 4-15, connect the interface cables and power cord to their respective

lo-

cations.

4.6 COMPONENTS

Figures 4-16 and 4-17 provide the mounting dimensions for the circuit board and drive mechanism. The

19

drive has a plug toward the center of the board. The plug tends 1.60 cm (0.62 in) from the front

cm (7.5 in) cable which plugs into the board connector with the wires coming out of the

is

keyed to ensure proper orientation. The cartridge ex-

of

the drive.

If

the drive

is

recessed in a panel, clearance must be provided around the opening for fingers to grip the cartridge. Ideally.,the cartridge slot in a front panel is

somewhat larger than minimum, to allow easy insertion. The opening should be at least the dimen-

1.3

sions of the cartridge,

cm (0.5 in) X

S.1

cm (3.2 in), located not more than 0.53 cm (0.17 in) above

the bottom mounting surface (line A in Figure 4-16). The drive must be free to float on its mounting

so

screws,

bezels or panels must not touch the drive.

4-13

SCREWS

WITH

MOUNTING

•

MOUNT

LOCKWASHERS

TO

THE

TU5g.VA~

USE

RUBBER

WITH

10-32

SCREWS

FOR

TOP

MOUNTING

BRACKETS

• 4

MOUNTING

AND

SCREWS LOCKWASHERS TO

BAllVA

HANG

MOUNT

r

FOR

I I SOLID

FEET

X 1/2

INCH

TABLE

TO

BAllVA

BRACKETS

WITH

FOR

OR

TO

,

-

-L

-..,

¥

(SBl1) FIRST.

MOUNTING

•

USE

METAL

10

32x

MOUNTING

HARDWARE

•

DEC

1/2

INCH

BRACKETS

SCR

EWS

KIT

70 1675300

WITH

FOR

DC

POWER

Figure 4-14 Mounting Choices for the TU

SERIAL LINE UNIT

(SLU) GROUND SCREW

. ;

DC

SOURCE.

BAl1-VA. TU58-VA

TUsS-VA

Figure

4-15

Interfacing the

TO ON ORSB11

58-VA

4-14

f

4.57

(1.8)

t

8.18

(3.22)

8.255

(3.25)

5.23

(2.06)

10.46

(3.812)

9.68 1

~--(4.12)----t

--r

A

(.71)

1.80

Figure 4-16 Drive Outline Drawings

l3.50~

(1.38)DIA

1'1---(3.50)

8.88

MEASUREMENTS CENTIMETERS VALUES ARE

IN

4-15

ARE

EXCEPT

IN

PARENTHESES

INCHES.

IN

.

17.73

DEC MATE: WITH

I .

24.13

(9.50)

24.85

--t_1

PT

#12-13508-04 I

AMP #87133-5

#87124-1

-e04

________

24.72

CONTACTS

SERIAL

.

CONNECTOR

INTERFACE

ilfl·'91

I (5.19)

I

.-!

,.27.

(.501

1----------(9.791---------...

1--

1

____

.

76

'4

(5.821

____

r-r-~~~-========~~-~-~-~~~

AMP

HEADER

MATE: WITH

HEAT

SINK:

3.0

(1.21

ABOVE

0.5(0.21

BELOW

1

12

3

GNO

5 +5

6

GNO

1--

____

1--------(6.98)-----+1

r--

________

1--------------(9.73)------+1

#87633-6 AMP#87272-8 I

AMP #87159-6

#87027

CONTACTS

POWER

CONNECTOR

,.....:::;DR:.::.;IV;..::E~O....,..-r_...,

.

____

64

'4

(5.77)

12:24 (4.821

.48

12.32 (4.851

13.18

MEASUREMENTS MEASUREMENTS

Figure

4-17

ARE

IN

CENTIMETERS

ARE ± .013

(.005)

EXCEPT

CENTER

TO

Board Outline Drawings

VALUES

CENTER

IN

PARENTHESES

ARE

IN

INCHES

MA·a370

The board should be mounted on a flat surface with 3 mm (4-40) hardware and 1 cm

at

Both the board and the drive may be mounted the drives,

1.80 cm (0.71 in) clearance is required; hole spacing

any angle. For mounting the drives to a surface above

is

given in the outline drawings. For

mounting the drives to a surface below the drives, an 8.18 cm (3.22 in) X 8.89 cm

is

cutout

required, with the same mounting hole spacing.

CAUTION

The mounting surface for the drives must

be

nat

within 0.64 em (0.025 in).

Mountfug hardware is included with each drive. There

of

each

the four mounting holes. Figure

4-18

shows one assembly; in addition

tion for the mounting surface, there is a specification for the depth

ing surface. To prevent extra compression

of

mounting surface. Any tapering

0.419

em

(0.165 in) the edge

4.7 INTERFACE STANDARDS

the mounting hole must be limited

of

the SELECfION

of

the

shoulder

spring,

is

The TU58 is shipped with factory-installed jumpers for a transmission rate 423 unbalanced line interface. A variety ers on the controller board. Table

of

standards and rates may be selected by changing the jump-

4-1

provides a list

is

a shoulder screw, spring, and flat washer for

the

not

more than 0.076

AND

SETUP

of

all the pins on the board and their functions,

to

the flatness specifica-

of

the shoulder screw in the mount-

shoulder screw should meet the

so

that

at

the screw's diameter

em

(0.030 in) below surface.

of

38.4K baud and the RS-

including the wire-wrap (WW) pins, interface, and power connectors.

(3/8

in) standoffs.

(3.50 in) chassis

top

of

the

of

4-16

THE MOUNTING

FOUR

Figure

SURFACE DRIVES WITHIN 0.64

MOUNT (0.075 in.) MAX THICK·

NESS WITH 6-32 SPACES, THREADED

0.076mm. (.030 in.) MAX OF MOUNTING

ON

EACH

DRIVE

4-18

TU58 Drive Mounting Hardware

FOR

MUST

mm.

ON

0.19mm.

FLAT

SURFACE

6-32

NUTS,

THREADED

OR

ON

INSERTS.

PENETRATION

SHOULDER

SURFACE.

THE

BE

6-32

INTO

ON

FLAT

(0.025 in.)

MA·S764f,

4.7.1 Selecting Interface Standards The serial interface operates

on

full-duplex, asynchronous, 4-wire lines

at

rates from 150 baud to 38.4K

baud. The transmit and receive rates may be independently set. Each 8-bit byte

no

start bit, one stop bit, and with EIA

RS-422 balanced or RS-423 unbalanced signal standards. When set to RS-423, the TU58

parity. The line driver and receiver may be set to operate in accordance

compatible with devices complying with RS-232-C.

is

transmitted with one

is

The TU58

imum wire length that may be used at that data rate is

approximately

is

shipped prewired for operation at 38.4K baud transmit and receive on 1\S-423. The max-

in

an electrically quiet environment like an office

27

m (90 ft). The wire used with any installation should be

diameter.

Longer wire runs may be made if data rates are reduced.

RS-423 and can be used over

than rived from the EIA standards, illustrates the variations rates. For more information, consult the standards

at

least 1200 m (4000

for RS-422 and RS-423 published

in

Industries Association.

4-17

no

less than

RS-422

ft)

is

considerably more noise-immune

at

any TU58 data rate. Figure 4-19, de-

24

A WG

distance needed by RS-423 for different data

by

the Electronic

Table

4-1

TU58 Module Connections

Wire-Wrap Pins WWI WW2 WW3 WW4 WW5 WW6 WW7 WW8 WW9 WWIO WWll WW12 WW13

150 Baud 300 Baud 600 Baud

1200 Baud

2400 Baud 4800 Baud 9600 Baud

19200 Baud 38400 Baud UART Receive Clock Input UART Transmit Clock Input Auxiliary A (to interface connector pin Auxiliary B (to interface connector pin 10)·

.

I)·

WW14 WW15

WW16 WWI7

WWI8 WW19 WW20 WW21

WW22 WW23 }

WW24

Factory

Ground}

Boot

RS-423 Driver

RS-423 Common (Ground) Transmit Transmit

RS-422 Driver+

RS-422

Receiver Series Resistor (Jump for RS-422)

Test Point

Line+ Line-

Driver-

Serial Interface Connector

J2 - 10 Auxiliary B J2-9 J2

- 8 Receive Line +

J2

-7

J2-6

Power Input Connector

J1-1

Jl-

3

JI-

5

JI-6

Ground Receive

Key (no connection)

+12V Ground

+5V Ground

Line-

.

Connect together for auto-boot on power-up.

J2-5 J2-4 J2-3 J2-2 J2-1

Ground Transmit Transmit Ground Auxiliary A

LineLine+

DrfveCable

J3,4-1 J3,4-2 J3,4-3 J3,4-4 J3,4-5 J3,4-6 13,4-7 13,4-8

• For optional use, such as timing signals from baud clocks.

CartL No Connection Permit Signal Ground Motor + Motor-

+12V

Tachometer

L

4-18

13,4-9 J3,4-10 J3,4-11 J3,4-12 13,4-13 J3,4-14 13,4-15 J3,4-16

LED Head

Shield Ground Erase Retum Erase 1 Erase

0 Head Retum Head

0

Head 1

1200 4K

M

FT

300

lK

M

FT

600

150

FT

M

CABLE

LENGTH

100

30

FT

M

50

15

FT

M

10

3

FT

M

Figure 4-19 Data Rate and Cable Length for RS-423

4.7.2 Connecting Standards Jumpers The jumper pins are standard A

WG

wire and a hand tool. Other techniques that may be used include slip-on connectors, such as

DIG

IT

AL

915 patchcords, 917 daisy-chain, or soldering. ,

0.635 mm (0.025 in) wire-wrap posts which may be connected using 30

300 600

DATA

"''''-

~"'''

'\~~

~('Q

,~"'-

~

~~

~(C'1!

&~

lK

2K 5K 10K 20K 40K

RATE

IN

BAUDS

RS·423

""2118

The baud rates may Simply connect the pin with the desired baud value to either the XMIT or RCV pins or both. Figure 20 illustrates the pin locations, and Figure

The interface standards may be selected by connecting sets in abbreviated form in Figure is shipped prewired for RS-423 with pin

be

set independently for transmission and reception, or both can operate together.

4-21

the factory-wired configuration.

of

pins together. The connections are listed

4-20. The group of pins

17

connected to pin 19, and pin

17

through

24

are the interface pins. The module

18

connected to pin 20.

4-

No

other pins in the group are connected.

For RS-422, pin

should be tied to pin 19, pin 22 to pin 20, and pin

23

to pin

24.

No other pins

in

the

21

group are connected.

4.8

OPERATIONAL CHECKOUT

A confidence check or keyboard console emulator The light on the

4.8.1

Checkout

of

the operation

of

a host system without the use

TU58 board should

of

Interface

of

the newly installed TU58 may be performed through the console

of

an operating system device handler.

be

on, indicating a functional processor.

To address the serial interface device registers with the console (consult the system manuals for address

and codes), perform the following steps.

1.

Set the transmit control status register to send Break to the TU58.

2.

Remove the Break condition.

3.

Transmit INIT: 04 (octal) to the TU58.

4. Transmit a second 04.

5.

Examine the receive data buffer to find Continue: 20 (octal)

4-19

DIAGNOSTIC

232117-19

423

18-20

422

21-19

22-20

23-24

LED

028

0

WW

24

++++++++

101

~

Id

EJ

WW

17

TP

+14

GND+

BO.OT+f:

160+ 300+

600+

1200+ 2400+ 4800+ 9600+

19.2K+

38.4K+ RCV+CLK

XMIT+CLK

AUXA+

AUXB+

WW

1

WW

13

_

Figure 4-20 Interface Selection Jumper Pin Locations

MAo-23M

4-20

38.4

KBAUD

Rev + XMIT

RS-423

o

o o o

o

(I.

o

c c

c

ooooOObO

rnrnD

UA--2383

Figure

4.S.2. Configuring Interface Modules

This section lists the switch or jumper configurations recommended for DIGITAL's asynchronous serial

interface modules. These modules connect the LSI-II QBus or the interface. Each module the standard bus address (176500) and vector (300) for the TU58. For other speeds or addresses, read the manual for the specific interface. And for TU58 configuration, see Figures 4-21 and 4-22. The interface requirements are

EIA RS-423 voltage levels (RC232-C compatible) Eight data bits One start bit One stop bit No Break enabled

4-21

parity

Factory Wiring

is

configured to run

as

follows.

at

the fastest speed possible (either 9600 or 38400 baud),

DC 0 DObbO

DTIDD

8800

BAUD

RCV

• XMIT

RS-423

Figure 4-22 TU58 Wiring (9600 Baud)

PDP-II

UNIBUS to the TU58's serial

..........

at

In the following tables, R means a jumper is removed, and I means a jumper

OFF

packs. of

the seating.

NOTE

is inserted.

refer to the positions on board·mounted switch

An

X means the TUSS

4-21

will

work regardless

ON

and

DLVll-A

(M7940)

Jumper

A3 1 A4 1 A5 1 A6 R A7 AS A9 AIO All AI2

V3 V4 V5 V6 V7

FRO FRt FR2 I FR3

NP 2SB NB2 R NBI PEV FEH R EIA

Setting

1 R 1 R R R

I

1

I

R R

1 1

R

I

R

X

1

Value

176500 (address)

300 (vector)

9600 (baud rate)

CLI Cl2 Cl3 Cl4

DLVtt-E

(M8017)

Jumper

A3

A4 R A5 A6 A7 AS AIO All AI2

X X X X

Setting

R R

I R 1

I

1

I

ValUe

176500 (address)

.

4-22

DLVll·E

(M8017) (Cont)

Jumper Setting Value

V3 V4 V5 V6 V7 V8

R R R

I I

R

300 (vector)

RO RI R2 R

R3 R TO TI T2 T3

BG

P

I

R

X X X X

I

R

E X

1 R 2 R PB

C

CI 8 81 R

H

B

-B

-FD

·FR R8 FB R M MI

R

I I

R R

R

I I I

R

9600 '(baud rate)

DLVll-F

Jumper

A3 R A4 R A5 A6 A7 R A8 A9 R AIO All AI2

(M8018)

Setting Value

R

I

176500 (address)

4·23

DLVII-F

(M8028) (Cont)

Jumper

V3 V4 V5 V6 V7 V8

RO Rl R2 R3 TO Tl T2 T3

BG

P R

~

1 R

2 PB

C I

Cl S Sl

H R

B

lA 2A 3A 4A

SA

IP

Setting

R R

R

I I

R

I

R

X X

I

X

R R

I

R R

R

I

X X X X X X

Value

300

(vector)

9600

(baud

rate)

2P 3P 4P

EF

M Ml MT

X X X

I

R R R

4-24

DLVlI-J (M8043)

Use channel 0

of

the factory-configured module for the TU58 interface. Change the baud rate for channel

o from 9600 to 38400 by removing the jumper from 0 to N and connecting 0 to Z. Refer to Figure 4-23.

Channel

0

is

now

compatible with the factory-configured TU58 with address 176500 and vector 300.

CHOAND

CHIEIA

SELECTION

RIO -

~f:r}c:H

sen

pe_

E~}

'----

CH2AND CH3EIA

SELECTION

;~}l

P__

CH3

sen

E

ree}

~J-R

pe_

AS'"

AI2

__

AS

...

AIO

__

A,,

__

ABe_

C2e_

~~m

01)(

CHO CHI COMMUNICATION LINE

~

--CH3

1

CH2

ADDRESS VECTOR

PARAMETERS

AND

JUMPERS

AO_

A7

{

va-

V7_

3M

...........

BREAK

SELECTION

ICHANNEL3)

e_

Figure 4-23

DLVll-J

4-25

Factory Configuration Summary

MXVII-A (M8047)

Use channel 0

on

factory-configured interface (address 176500 and vector 300). Refer to Figure 4-24

and Table 4-2

~I

eJ44

eJ43

eJ42

e

J41

eJ40

J38

m eJ29

~J38

.J29i1

Li

J35

.J27

J38

I

I·

Figure 4-24

1

:

~.~~~I

J3D

..

J22J

"J21

eJ20

JIB .J18 eJ17 eJ1B

.Jl

•

eJ12

eJl1

eJl0

eJl

eJ8

MXVll-A

18

•

Jl

Jumper Locations

J7

C!e

J8J6

ee

J4J3

.... 4 .....

.H

..........

--

4-26

Table 4-2

Function

MXVII-A

Standard Factory Configuration

Wire-Wrap Pins From To

Level

RAM

bank 0

SLU

CHO,

address SLU

address

ROM

SLU vectors

SLU parameters J59 (eight data bits, parity bit, one stop bit) J61

177

560 J24 J19

CHI,

177560

bootstrap (TU58) J37

CHO(300) CHI(60) .

no

J30 J32 J33 J31

J23

J28 J26 J25 J27

J21 J34 J37 L2 J33 J39 J29

J53 J54 J52 J56 J51 J54 J55

J62 J60

J59 J66 J63

J31

Ll Ll

J32

JI8

L2

Ll Ll

JIO Jl5 JI4 Jl3

J38 J22

Jl5 J57

L2

Ll Ll Ll

Ll Ll

L2

Ll Ll Ll

L2

J6l J64 J63 J62 L2

J65··

Ll Ll

Ll

L2 L2

Baud

rates

Bread generation

(Half option) Crystal clock

CH0(38400) CHI(9600)

J45 J46

J6 J7

J68

J50 LI J48

J67

Ll Ll

Ll

4·27

DLtl-D

(M7800

or

M7800-YA)

Jumper

A3 A4 A5

A6

A7 A8

A9

AIO

V3

V4

V5

V6

V7

V8

Baud rate switches Position 8 for

NP 2SB I EPS X NB2 Nl

9600 baud receive and transmit with speed group 4 crystal (4608 MHz).

Setting

I I I R

I

R

I R

I I I

R

R I

R

I

Value

176500 (address)

300 (vector)

Jl N2

J3

J4 J5 J6 R J7 J8 I J9 JI0 JlI

I

R

I

R R

I

R

4-28

DLll-E

(M7800)

Jumper

A3 I A4 I AS A6 A7 A8 R A9 AIO R

V3 V4 V5 V6 V7 V8

Baud rate Position 8 for 9600 baud receive and transmit with speed group 4 crystal (4608 MHz),

NP 2SB EPS X NBI R NB2 R NI

switches:

Setting

Value

I

"R 176500 (address)

I I

I I I

300 (vector)

R

R I

R

I

JI J2 J3 J4 J5 I J6

J7 I J8 I

J9 JI0 J

11

I

R

I

R

I

R

4-29

DLll-W

(address 176500, vector 300, speed 9600 baud)

(M7856)

Switch

2 1 X

3

4

Pack

Switch

Number

2

3

4

5 On 6 7 On

8

1

2 On

3

4

,

6-10 X

1 On

2 X

3

4

5 On

6 7

8 X

9

10

Position

Not placement unspecified)

X

orr orr

On

orr orr

On

orr orr

X

orr

used (Switch

5 1

6

9

orr

2

3

4 On

5 7

8 On

10

On

orr orr

On On

On

orr

4-30

4.8.3 Checkout

I. Insert a tape cartridge into drive 0 (left side). (The TU58 should have sent Continue

already.)

2.

Transmit the following string of octal numbers to the TU58. (Consult the programming chapter for an explanation of this format.)

of

Drive Command Function

2

12

2

o o

o

200

o

204

212

The

TU58 should wind to the beginning

see Table 2-1, under

"TU5S does not respond to host."

of

the tape and read about half

of

the tape.

If

(208)

it does not work,

4-31

CHAPTERS

OPTIONS

5.1

RUN INDICATOR

Each tape drive may have an LED indicator which lights to show tape motion. Since data loss can

if

occur

the indicator is

5.1.1 Installation

The indicator (which may be any device capable of handling 30 mA with a forward voltage less than

V) is wired in.series with the tachometer source indicator. Splice the run indicator into the wire from

pin 7

should be on the board side of the wire (symbol dicator is available from DIGITAL (PN 11-10324), and wires with slip-on connectors are available to join the indicator to the tach (cable number

indicator

a cartridge is removed while the tape is being written, the cartridge should not be touched if

on.

of

the drive connector. (Count from the end with the missing pin; that pin is number 2.) The anode

arrow pointing away from pin 7, Figure 5-1). The

70-16526) and to extend the board connector end to the

at

the front

of

the drive (cable numbet70-16525).

1.8

in-

Figure

TO

7

ADDED

J3,J4

+12V

PINB-----....I

5-1

LED

7

9---------'

Installation of Run Indicator

...---,

5-1

I

5.2 BOOT SWITCH

5.2.1 Special provision has been made for interfacing the TU58 to the The TU58 using keyboard ODT. This means that a keyboard cannot be connected at the same time. This arrangement reload and restart an unsupervised process controller or similar application. The Boot switch allows a manual reboot without powering down to cycle the automatic sequence.

General

LSI-ll

is

placed at the system console address and vector, permitting it to "type" in a program

is

useful in an unattended control system, where the TU58 can automatically load and start or

ODT keyboard interpreter.

NOTE

Boot

mode

does

not

work

in

any

DIGITAL

ating

system

5.2.2 Operation When the boot switch manner.

1.

On power-up, the TUS8 checks for the presence ond and begins the boot procedure.

2.

When the TUS8 is in the idle state,

close sequence causes a one-second delay (to allow for contact settling or to allow the host

processor to enter the halt mode),

The boot procedure positions the tape in drive 0 to block 0, sends Break to the host, and transfers CII

characters from the tape to the host. A delay from the Any other character The TU58 exits the boot mode following the transfer enters the idle state. Because be used with boot.

LSI-It.

is

connected according to Paragraph 5.2.3, the TUS8 operates in the following

If

the character sent

is

interpreted as a control chatacter, and time

of

environment.

of

the closed switch.

it

monitors the Boot switch. Any switch contact open-

and then the

is

ASCII 0 -

the timing requirement, only rates

ruS8

inserted between characters to allow for the echo

7,

this delay

of

the terminating character ASCII G (147g) and

begins the boot procedure.

oper-

It

then delays one sec-

is

one character time

is

allowed for

of

9600, 19.2, and 38.4K baud may

15

at

9600 baud.

characters of echo.

...

; .

A~

5.2.3 The boot pin on the board (WW16) may action switch. Wires may be wire-wrapped. DIGITAL 915 patch-corded, or soldered to the pins. Placement of the switch and lead dress are not critical if adequate clearance

of The boot tape contents are formatted to appear to the

operating under the

Installation

be

connected to ground through a normally closed momentary

the drive and the heat sink and power resistors on the module.

LSI-II

ODT keyboard interpreter.

is

provided around moving parts

as output from a console (keyboard)

5-2

This

boots

drive

1000/012701

1002/176500

1004/012702 1006/176504 1010/010100 1012/005212 1014/105712

1016/100376 1020/006300 1022/001005 1024/005012 1026/012700

1030/000004 1032/005761 1034/000002 1036/042700 1040/000020 1042/010062 1044/000002 1046/001362

1050/005003 1052/105711 1054/100376 1056/116123 1060/000002 1062/022703 1064/001000 1066/101371 1070/005007

0

only.

roSS/PDP-II

APPENDIX A

TOGGLE-IN

BOOT

A-I

APPENDIX

RSP

SEQUENCE

B

"NEWTAPE"

2

12

5

o o o

o

377

1

6

14

2

12

5

o

o o o

o

7

1::!

RSP

SEEK 8LOCK

SEEK BLOCK

Seauence

TO

777

TO

0

Checksum

+

14

1

12

0 0 0 0

1

14

carrw>

0000101000000010 0000000000000101 0000000000000000 0000000000000000 0000000000000000

+

0000000111111111

~

Calculation

2 5

0

Octal

0

Addition

0

377

6

Exa.ple

Binar~

Addition

B-1

SAMPLE

APPENDIXC

DEVICE

HANDLERS

cccccccccccccccccccccccccccccccccccccccccccccccccccccc

CCCCCCCCCCCCcccccccccccc

c c

C

C T U C

C T U U 555555 C T U U

C T U U C

C . C

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

C

C C

C

C C

C

C C C

C

C C C

TTTTTTT

U U 5555555 88888 C

US

T U

T

Tne

following handler used

with

it

can

UUUUUUU

package

be

the

built

US

program RT-!!

applications.

The program

implements

ierror = TUREAD(

Read

"bytecount"

unit

"unit"

starting

lerror = TUWRIT(

Write

"bytecount"

"buffer"

lerror

access

=

TUSEE~(

blOCk

Position the

random-access

ierror = TUOIAG(

Run

tne

In

all

four

COdes,

!error

as

follows:

value

cases,

o

1

-I

-2

-8

-9

-11

-17

8 8

8 8 C

88888

58 58

555555

~8888

listing

_ritten

entirely

FORtRAN

into

ROM/PROM/EPROM

four

unit,

bloCk,

bytes

into

at unit,

onto

the

random-access

bloCk,

TUS8

noted unit, the

bioCk

TUS8

)

TU58

internal

the

functions

meaning Of t40rmal

Success, TUS8 Partial

Invalid

No

success

but

failed

operation unit

cartridge

Specified

Data

cheek

FORTRA~

SUP

P 0 R T C

8 C

e

contains

in

IV

compiler

user-program

bUfter,

from

data

area

bloc~

buffer,

bytes

drive by

"bloCk".

from

"unit",

PACKAGE

a

compl~te

PDP-It

and

based

callable

bytecount

the

TU58

specified

"bloc~"

bytecount

the

data starting

FORTRAN

object-time

LSI-1t

)

drive

on

)

area

TUS8

device

IV.

When system,

microcomputer

entry

points:

specified

by

"buffer",

the

cartridge.

specified

at

tne

random-

)

cartridge bloCk

controller

error

retries

self-test

nU~ber

is

cartridge

error

located

specified

In

by

"bloCk".

dlaanostlc

return a standard

Code

were

required

(TUDIAG)

(end-of-medlum

was

mounted

on

speCified

in

is

specified

_rite-protected

cartridge

drive

"unit"

function.

set

of

encountered)

drive

at

error

(TUWRIT)

C

C C

by

C-l

C

-32

-33

-48

-S5

-127

error Motor Invalid Invalid Communications

(block

stooped

operation record

not

(TUS8

number (bad error

found)

hardware

code

between

(error

block

See~

c

software tnrough a OLV11, whicn

has a receiver

assumes

that

the

DLVI1-J, DLVI1-E, DLV1!-F,

CSR

address

TUS8

assignment

controller

or of

This

c

C

e

mode

software

only

operates

for

simplicity.

the

interface

in a non-interrupt-driven

The

e e

e e e

program Eguipment on

any computer

its

rellaollity

is

Corporation,

neither system.

on

any

licensed

and

may

Dlaltal

hardware,

nor

be

supported

copied assumes Digital-supplied

or no

modified responsibility

This

e

cccceCCCCCCCCccccccececccccccceeccceececccccecccccccec

c

INTEGER

FUNCTION

Tudlag

e

e C cooe

Runs

TUSS as

function

controller

result.

diagnostic

function,

returning

e

IMPLICIT

eO~~ON

INTEGER

Icmdpktl

(a-z)

packet(6)

e

C

Initialize

TUdiag =

IF

(Tudiag.ne.O)

a

command

Init(7)

GOTO

packet

100

wltn

the

DIAGNOSE

e

Now

transmit

the

paCket

to

the

TUSS

controller.

e

CALL

Sndpkt(packet,12,O)

c

C

e

100

And

ask

for

the

results

Tudlag = Getend(O)

RETUMN END

of

t~e

diagnostiC

in

error)

in

tois

progra~)

number

host

and

is

interfaced

MXV11

176500(8).

by

Digital

or

passed)

TUS8

Interface

for

ule

otnerwise.

for

CcccccceCCCCCCCCCCCC

success

operation

tne

end

code.

packet.

c

e e e

e

C

e

C

e

C

100

INTEGER

Positions by as

IMPLICIT COMMON

Initialize

Tuseek =

IF paeket(3) = unit packet(6) = block

Transmit CALL And

Tuseek = Getend(O)

RETURN

END

FUNCTION

"bloCk", tne

(TUseek.ne.O)

ask

cartridge

returning

function

INTEGER

IcmdPktl

Init(S)

the

SndP~t(packet,12,0)

for

a

command

the

result.

paeket(6)

statuI

Tuseek(

in

the

(a-z)

packet

GOTO

100

to

unit,

"unit"

success

the

of

tne

block

to

with

TUSS

operation

)

r~ndom-access

code from

the

POSITION

controller

C-2

from

blOCk

tne

TUSS

operat1on

the

end

specified controller

code

packet

INTEGER

FUNCTION

TureadC C C

e

C C code from

Reads "by Into

the

access

bloCk

tent" data

the

bytes

area

"block"

TUS8

from

speCified

on

controller

C

IMPLICIT BYTE COMMON

EQUIVALENC~

INTEGER

ca-z)

bufferCbytcnt),

Icmdpkt/"packet(6)

(lword,bword)

bword(2)

C

Build a READ Turead =

IF

CTuread.ne.O)

Inlt(2)

command

GOTO

packet

packet(3) = unit packet(5) = by

tent packet(6) = olock CALL

Sndpkt(packet,12,0)

C

~ead

10 chksum =

IF

Index

= 1

the

Getbyt()

(chksum.ne."OOl)

packet

GOTO

detent = Getbyt()

chksum = chksum +

Odd

= 0

DO

100, odd = IF

l=l,datcnt

.not.odd

(odd.eq.O)

GO

TO

datcnt'256

SO

bword(2) = 0

=

bwordCl)

Getbyt() butferClndex) • bword(l) GO

TO

50

100

C

100

bword(2) = dhksum =

buffer(index) Index = Index

(odd.ne.O)

IF

bwordCl) = bword(2) =

IF

Cchksum.ne.lword)

GO

TO

10

Getbyt()

Check(chksum,lword)

= bword(2)

+ 1

ChkSum = Check(chksum,lword) Getbyt() GetbytC)

Found paCket which

GOTO

Is

400 Turead = Getend(chksum)

500

RETURN END

INTEGER

FUNCTION

Tuwrlt( C C C C

C

writes to Returns

INPLICIT BYTE

COMMO~

-bytcnt"

TUS8

drive

success

INTEGER

buffer(bytcnt),

Icmdpktl

EQUIVALENCE Construct

a -RITE

bytes

"unit",

code from

(a-z)

bword(2)

packet(6)

(lwOrd,bword)

command

Tuwrlt = Inlt(3) IF

(Tuwrlt.ne.O)

GOTO

packet(3) = unit packet(5) = by

tent packet(6) = block C)LL

5ndpkt(packet,12,0)

unit,

th~

the

500

from.

400

SOO

not

data

unit,

from

data

starting

TUS8

packet

500

block,

TUSB

by

drive

"buffer",

cartridge.

as

the

and send

the

TUS8

!Proceed

packet;

block,

area

at

random-access

controller

and

bUffer,

select~d

starting

~eturns

function

it

to

the

to

400

try

for

bUffer,

specified

as

transmit

bytC"t

the

)

by

"unit-

at

success

random-

result.

TUS8

controll~r

It

not

data

end

packet

bytcnt

by

)

"buffer"

bloCk "blOCk".

function

it

to

result.

the

paCket

TUS8

C3

C

10

C

e

C

400

C

500

datcnt = bytcnt

Prepare

flag

chksu~

IF CALL count CALL CALL

to

transmit a new

=

Getbyt()

(chksum.ne.

M

020)

PutbytCM001)

= MinOCdatcnt,128)

PutbytCcount)

GOTO

data

400

pack.t

!Proceed ITransmit

l~ake

10utput

Sndpkt(bUfferCbytcnt-datcnt+l),count,count*256+

datcnt = datcnt • count

GO

TO

10

Received

Tu~rit

flag

was

not a CONTINUE.

= Getend(Chksum)

Try

RETURN

END

by

checking

to

data

packets

byte

for

400

if

packet

maximum

count

lND

packet.

for

CONTINUE

not

CONTINUE

flag

128

for

packet

M

001)

bytes

C

C Computes

INTEGER

e

technique

e

C

IMPLICIT check

= I + 1

e e

C 15

If

neither

poss1ble

e

IF (

(l.or.l).ge.O

e

C

e

C

100 200

C

e

C

C Wait

C

10

C

C Get

C

C 222

If

both

generated

IF (

(i.and.1).lt.0

If

only

If

IF ( check.lt.O ) GOTO Perform check

• Check + 1 RETURN END

INTEGER

Gets

controller

I~PLICIT

for

IF (

(IpeekC"176500).and."200).eQ.0

Character

Getbyt = IpeekC"176S02).and.255

WRITE(6,222)GETBYT FORMATC· RE'l'URh END

FUNCTIOP4

l&-blt

for

checksum

TU58.

INTEGER

Input

Inputs

one the

have

has

high-order

sum

doe I

end-around

FUNCTION

byte

from

to INTEGER input

character

from

R·,03)

Check C i., j )

of

Is

has

200

I and "

returned

Sum

(a-z)

ooerand

)

GOTO

hiOh-order

)

GOTO

100

bit

not

have

200

carry

if

required

Getbyt

the

serial

the

hOlt

machine.

(a-z)

aVailable

data

buffer

using as

high-order

bit

set, a carry

set,

Its

then a carry

h1gh-order

interface

(DONE

)

and remove

end-around

function

bit

connecting

flag

GO

TO

10

extraneous

set,

bit

set)

value.

no

carry

is

always

occurred set

the

bits

carry

C-4

SUBROUTIHE

C C

C C Walt

C

10

C

e

222

8YTE writes a byte

controller

IMPLICIT

IF ( Transmit

CALL

WRITE(6,222)OUT8YT FORMAT(' RETURN

END

INTEGER

e

C C

C

Initializes Returns 0 If

IMPLICIT

CO~MON

Initialize Inlt

packet(l) packet(2) packet(l) packet(4) packet(s) packet(6)

e Loop

C

C C Walt C

C

10

C

e

C

C C

C

SO

C

procedure DO Set CALL

transmitting DO

CALL Remove CALL Discard

idummy • Ipeek(-176502) Output CALL

CALL

wait

IF ( CONTINUE

OUTBYT

for (Ipeek(·176504).and.·200).eQ.0

Ipo~e(·176S06,outbyt)

= 0

to

50,

BREAK

IPoke(-176S04,-OOOOOl) for

10,

Putoyt(-OOO)

IPoke(-176504,-OOOOOO)

putbyt(-004)

for Getbyt().eq.-020

Putbyt(

to

INTEGER

output

character

T',Oll

.

FUNCTION

TuSa

properly

INTEGER

IcmdPktl

command

• 10*256 + -002

= opcode

0

=

= 0

0

=

0

=

allow

J=l,a

bit

BREAK

eight

1=1,8

BREAK

two INIT commands

Putbyt(-004)

CO~ditlon

any (pOSSiDly

, cheCk

to

the

host

(a-z)

interface

Inlt(

controller

(a-z)

packet(6)

eight

in

output

to

cause

for

outbyt

by moving

packet

retries

~UL

)

serial

machine.

ready

opcode )

initialized,

area

serial

framing

characters

on

output

erroneous)

to

CONTINUE

)

GOTO

interface

(DONE

It

to

for

operations.

with

of

entire

interface

error

under

interface

character

TUsa

controller

flag

100

connecting

bit

)

GoTO

data

buffer

-127

otherwise.

opcode

initialization

(XCSR)

in

TUS8

It

In

response

set)

10

register

specified

by

in

input

the

TUS8

buffer

~·5

C C

100

If

no

success

Inlt = ·127 RETURN END

after

ei9ht

retries,

report

error

SUBROUTINE

SndpktCbuffer,bytcnt,chkini)

c

C

C checKsum.

C

Transmits a command

sending

IMPLICIT BYTE EQUIVALENCE

Chksum = chkini odd = 0

"bytcnt"

CheCksum

INTEGER

buffer(bytcnt).

(iword,bword)

bytes

(a-z)

or is

bword(2)

c

C

Loop

to

transmit

packet

e

DO

100,

odd =

IF

i=l,bytcnt

.not.odd

(odd.eq.O)

GOTO

50

c e

C

If

an odd-numbered

bword(2) = 0

bword(l) = buffer(l) GOTO

100

byte,

c

C

C numbered C SO

C C

C

100 C

C

C Reads an end paCket from

C as

C

Perform

bword(2) =

chKsum

In CALL

IF Output

lword = chksum CALL

CALL

RETU~h

END INTEGER

I~PLICIT

BYTE EQUIVALENCE

Checksum

byte

buffer(l)

: Check(ChKsum,lword)

either

(odd.ne.O)

the

case,

Putbyt(buffer(i»

computed checksum

Putbyt(bword(l» Putbyt(bword(2»

FUNCTION

functlon

INTEGER

bword(2)

(lword,bword)

calCUlation

output

chksum = CheCk(chksum,lword)

GetendCchklnl)

value

the

(a-z)

c

C C

C

c

C

10

chksum =

If

Input

already IF

(cnksum.ne.O)

chksum = Check IF

(chksum.ne."002)

IF

(Getbyt().ne.l0)

IF

(Getbyt().ne."100)

chklnl

cnecksum

been

Getbyt{}

for

valid

read

1s bY

GOTO

gNO

not the

10

paCket GOTO

GO

TO

GOTO

data

pacKet

from

"buffer",

initialized

contents,

remember

for

byte

to

for

packet

the

TUS8

success

zero, caller.

structure.

500 500

500

to

the

TUS8

followed

from

the

one

byte

It

for

checksum

each

byte

Interface

controller, code from

first

byte

It

Is

the

!MuSt !Must have !Must nave opcode =

have

controller,

by

"chkinl"

at a time

pair

returning

the

paCKet.

of

paCket

"chklnl"

flaq = COMMANO byte

count = 10

the

uPdated

argument.

calculation

on

even-

has

value.

END

C-6

c

C C

C

C Read and

C

100 chklum =

C

C Read

C

If • valid store

Getend • chklum •

DO bword(l) = Getbyt() bword(2) • Getbyt()

bword(l) = Getbyt() bword(2) = Getbyt()

IF

It

100,

1=1,4

transmitted

(Iword.eq.chksum)

c

C

500 Getend =

600

1+

, The ,

handler

,

, The program

,

I

,

I

,

I

,

Indicate

RETURN END

.TITLE

.IDENT

fol10wlno

paCkage

IERROR = TUREAD( Read

unit Itartlng

IERNOR = TUWRIT( Write

"BUFFER" bloCk

IENROR = TUSEEK( POSition

random-access IERROR = TUOIAG( Run

TU58

10.11

program

implements

"BYTECOUNT" "UNIT"

"BYTECOUNT" noted

the

,

In

all

I COdes,

,

, ,

cases, as

IERROR

the

follows:

VALUa

o

1

-1

-2

-8

-9

-11

-17

-32

-33

packet

Getbyt() Check(10*256."102,Getend*256)

dllcard

Check(chksum,lword)

Checksum

-127

written

Into

at

random-access

onto

by

the

TUS8

functions

Is

found,

remainder

-

checksum and compare

GOTO

or

transmllslon

NON-INTERRUPT

listing

In

PDP-II

four

FORTRAN-callable

UNIT,

bytes the

data

UNIT,

bytes

TUSS

drive

"BLOCK".

UNIT,

TU58

cartridQe

bloCk

Internal

specified

)

controller

return a standard

NormU success, TUSe

failed partial Invalid

NO

eartrldQe Specified Data

check

Seek

error

~otor

stopped

read

of

600

contains a complete

MACRO

BLOCK,

from

the

area

block

8LOCK,

from

"UNIT",

BLOCK

located

NEANING

success

but

self-test operation unit

cartridge

error

(block

success

paCket,

error

DRIYE~

assembly

BUFFER,

TUS8

speCified

"BLOCK"

BUFFER,

the

data starting

)

by

"BLOCk".

diagnostiC

OF

retries

(end-of-mediu_ number Is

mounted

on

not

(TUS8

code

updating

with

TUS8

HANDLER

entry

BYTF.COUNT

drive

by

on

BYTECOUNT

area

at

in

drive

set

STATUS

was Is

cartrldae

nardware

COO~

were

required

(TUDIAG)

specified

In

write-protected

found)

byte

checksum

computed

TUS8

lanQuage.

speclflp.d the

specified

speelfled

device

points:

)

"RUFFF.R",

cartridge.

)

the

random-access

"UNIT"

function.

of

status

encountered)

error)

and

value

by

at

drive

the

(TUwRIT)

C-7

1 ;

;

This

; thrOugh a ,

:

;

, , Equipment , ; ;

software

which SUbroutines space

This on

for otherwise.

has a receiver performances

program

any

computer

its

-48

-55

-127

assumes

OLV11,

were

1s

Corporat1on,

reliability

neither

system.

Invalid

Invali~

Communications

that

DLVI1-J, DLVI1-E, OLVI1-F,

CSR

wr1tten

are

not

liscensed

and

on

any

operation

record

the

address w1th a

optimal.

may

01qital

hardware,

nu~ber

error

TUS8

controller

assiQnment

goal

of

nor

be

supported

copied

assumes no

Digital-supplied

code

readability:

or

(error

(bad

between

or of

modified responsib1l1ty

In

block

host

is

interfaced MXV11 176500(8).

by

interface time

DlGITAL

for

this number

and

use

or

progra~)

passed)

TUSS

These

and

;-

;

Oefine

:

Define

:

Def1ne

, Macro

;

LAB:

.SBTTL

packet

F.OATA

F.CTRL

F.INIT

F.CON!

F.XOFF

Control

O.READ O.wPIT O.POS O.OIAG O.lHD

controller

DLRCSR DLRBUF DLXCSR

DLXBUF

to

send a cyte

.MACRO

T518

BPL

MOVS

.ENDM

Symbol flag

Oefinit1ons

byte

= = =

= =

packet

=

= =

1nterface

= = = =

to

PUTeYT Ol'DLXCSR LA8 ARG,

UDLXi3i.1F

PUTBYT

codes

1

2

4

20

23

op-codes

2 3

5

7

100

address

176500

OLRCSR+2

DLRCSR+4

DLRCSR+6

TU58

ARG,

?LAB

and Data Area

,

Data Control

:

INIT pac\ct'!'t

;

CONTINUE XOFF

perform perform perform perform packet

assignment

packet

read wr1te seek self-test

is

operat1on

operation

an

End

packet

; Macro ;

NOTE: into

LAB:

,

Data

, Area

;

PACKET:

;

Word

to

wait

If

ARG

the

high-byte

.MACRO

TSTB

BPL·

MOVE!

.ENDM

area

.PSECT

used

.BYTE

•

WORD

used

for a byte

Is a reg1ster,

GETSYT UDLRC5R

LAB

il'DLRfHIF,

GETBYT

USERSO

to

build

F.CTRL,

0,

to

collect

of

Control

0,

byte-pairs

from the ARG,

ARG

Rw,

10.

0,

TU58

the

register.

D,

0

par1ty

?LAB

LCL,

paCkets

for

REL,

16-bit

bit

CON

,

Control

e-8

w1ll

be

paCket,

cheCksum

s1gn-extended

length

calculation

= 10 •

,

110RD: 1

Pure

,

1+

1

TUREAD

I

;

Description:

,

Inputs:

,

1 O(RS) = 4

, ,

,

1

;

Outputs:

,

,-

.BLKW

(ROM-able)

.PSECT

.SBTTL

see

RS

2(R5) 4(R5)

6(R5)

8.(RS)

RO

module

points

•

=

t6-~lt

TURF-AD

address address address

code

USERSI

heading

to a five

address

status

follows

R~,

I,

Read

word

of

unit

of

block

of

callers

Of

bytecount

code

LCL,

Data

From

standard

number

number word

REL,

input

word

CON

TU58

byte

buffer

FORTRlh

argument

b10c~

TUREAD::

;

auild a control

, Send

,

:

Receive

,

5S:

I

Re

,

each

,

10.:

the

ce i v e

pair

CALL TSI SNE

MOVS MOVS

MOV

MOV MOV

CLR CALL

zero

MOV

GETBYT CMPB

8NE

GETBYT

SIC SIiIAB

815

SWAB

CL~

all

COM BEQ eLR G!TBYT

MOVa

8~

I~If

RO

50S

'O.READ,

~2(R5),

~8.(R5),

~4(R5),

Control

'PACKET,

tt2.,

R2 SNOPKT

or

o(R5),

110

RO,

90'

112

'''C<377>,

112

R2,

112

R3

ch

ar

of

Characters

R3

20$

NOIID WORD WORD,

30.

packet

Rt

more

U·.DAT~

RO

ac

te

rs

(R1)+

PACKET+2

PACKET+4

PAC~ET+8.

PACKET+I0.

to

the

RO

Data

paCkets

111

R2

1 n

th e Da

15

received.

TU58

ta

from

pac

I~itlallz~

If

error

return

operatton store store

I

store

,

PO

,

R1

,

P2 = init!al send

TUSS,

I

Rt = address get

If , cheCk :

oet

,

char ; form

I

RO = current

;

restore R3

ke

t, u Pd

;

flip

,

branch

,

build

,

with

,

store

unit

byte

bloc~

points

= number

the followed

flag

not a Data

for

byte

hi-byte

Initial

Is

even/Odd

at

flaq

Character

the

occured,

error

If

to

is

"RElO"

number count

number

to

packet

of

chec~sum

Control

by an

of

byte

from paCket,

End

packet

count

cnec~sum

checksum

byte

count

In 9 ch ec ks

second data

byte

TU58

c~ller

bytes

from

byte

character

to

packet

End

callers

TU58

flip-flop

um

a s

character

pair In

callers

send

packet. buffer

in

RO

of

pair

buffer

20S:

G!TBYT ADD lOC

MOV8

wOIlO+l wORD,

110

WORD+t,

RO

(Rl

)+

qet

,

update

;

with

,

store

C-9

second

end-around

byte

cnecksum

data

byte

pair

of carry

in

callers

buffer

30$:

SOB

R2,

lOS

loop

until

byte

count

is

zero

packet,

;

,

Receive

,

40$:

Checksum

;

50$:

, A

paCket

, Check

;

90$:

;caller

;

1+

TUWRlT

Descr1ption:

I

;

TST

SEQ

ADD ADC

checlcsu~

GEnU

GETBYT

CMP

SEQ

error.

MOV

RETURN

was see

BTTL

module

received that

to

JMP

.S

See

R3

40$

wORD,

RO

from

"'ORO WORD+l wORD,

5$

Return

'-127.,

it

TU

WR

IT

heading

RO

is

TU58

error

RO

from

an

Send

and

compare

COde.

the

TUS9

End

Packet.

oat a to

T

that

Us

8

;

If

:

finisn

to

get compare

if

set

and

was

cheCK

odd number

checksum

computed

16~bit

with

the

same,

function return

not a Data

End

of

data

bytes

value

checksum

computed cheCKsum get

value

to

paCket

caller

paCket.

and

to

return

error

In

packet

code

to

Inputs:

,

I

;

,

;

Outputs:

,

;

R5 = address

0(R5)

2(R5) = address 4(R5) • address

6(R5) = address

B.(RS) = address

RO

=

,-

TUWRIT::

Suild a Control

, Send

;

CALL

TS7

SNE

,",OVB

MOV~

MOV

the

MOV MOV

CLR CALL

TIl

0 V

MOV

Control

= 4

16-bit

IN

RO

99$

'O.WRIT,

~2(R5),

fa.(RS),

~4(R5),

'PACK!'.:T, #12.,

R2

SNDPKT

@B.(R5),

6(R5),

ot a five

status

IT

packet

paCket

Rl

of

unit

of

block

of

output

of

bytecount

code

to

send

PACKET+2

PACKET+4

PACKET+8.

PACKET+l0.

to

the

RO

R3

115

word

standard

number

number word

buffer

word

to

the

TU59.

FORTRAN

byte

initialize

if

unsucceSSful,

return

TU58.

OD-code set set set

RO = address Rl

= number

R2 = 1nltial send

R3

= number

R5 = adoress

to

unit byte blOCk

the

argument

the

caller

1s

"WRITE"

number count

nu~ber

ot

paoket

of

block

TU58

of

packet

bytes

checksum

bytes

Of

callers

to

left

send

to

data

send nut

fer

C-IO

, Send

,

10$:

,

to

, ,

to

I

20S:

; A

byte

,

See

,

90$: 99S:

one

GETBYT

CMPB SNE PUTBYT

MOV

send

CMf

send,

BHIS

IIOV

PUTBXT

MOV MOV

MOV

SitAe

ADD CALL SUB

ADO

8R

If

CALL

RETURN

or

was

the

more

Data

flO

RO,

90$

'F.DATA

1128.,

R3,

20S

fil,

1-14

RS,

R4, Rl R4, R2

,r.DATA, SNDPKT R4,

R4,

10$

rece1ved paCket

GETENO

packets

,F.CONT

R4

!/4

MO

R2

R2 R2 = initial

R3

RS

from

15 an

End

the

to

TU5~

packet.

the

that

TUSe.

J

;

I

,

was

get a byte

if

not

check send assume

if

RESET

send RO Rl = length

send update update

~ait

return

for

Data

less

F4

byte address

=

the

for

not

CONTINUE,

128

than

to

packet number data

aCknowledgment from

a

CONTINUE.

to

from TU58

End

packet

or

more

128.

actual

count

of

packet

of

packet

checksum

to

o~

buffer

caller

flag

bytes

number

fU58

bytes

pointer

left

to

left

left send

to

TUS8

sene!

.S8TTL

,+

I

TUSEEK

;

Description: ; ;

Inputs: ;

I O(RS) = 2

; 2(RS) =

,

I

1

Outputs: ;

;-

TUSEEK::

; BUild

1

send

See

module

RS = address

4(RS)

RO = 16-b1t

=

CUL

TST

Sr.E

Control

,",ove

Move

MOV

the

Control

MOV MOV

CLR CALL

TUSEEK

heading

of

address address

status

INIT

RO

99S

packet

,Q.POS,

~2(RS),

~4(R5),

'PACKET,

112.,

R2 SNDPKT

to

packet

1H

Posl

tion

the

three of

of

PACKF.T+2

PACKET+4 PACKET+I0.

word

standard

unit

number

blOCk number word

code

send

to

fUSe.

to

the

TU58.

RO

TUS8

byte

FORTRAN

initialize if

in1tialization

return

set set set

~O

P2

R2 = initial send

error

op-code

unit

number

bloCk number

points

=

lenqth the

packet

arqument

the

TUSS

to

caller

to

packet

of

P!Cket

checksu~

block

failed,

Get

an

End

packet

CLR

99$:

CALL

RETUR~

from

RO GETEND

the

TU58

and

return

C-ll

to

1ndicate return

caller.

no

to

caller

byte

pre-read

·saTTL

;+

,

TUDUG

,

O~script1on:

I

I I

Inputs:

: none

I

,

Outputs:

,

S~e

RO

II:

,-

TUDUG

mOdul~

16-blt

Run

h~adlnq

status

TU58

code

Local

Diagnostic

TDOUG:

,

;

0

•

;

99S:

:

Build

send

t~e

Receive

,+

, INIT

,

Description:

,

Inputs:

,

outputs:

,

,-

CALL TST BN!

Control

Mova

MOV

MOV CLR CALL

an

CLR CALL

RETURN

.S8rTL INIT

INIT to This followed The

non~

RO = 16-blt

INIT RO

998

packet. 'O.DIAG,

Control

'PACKET,

112., R2 SNDPKT

t:nd

packet

RO GETEND

is

called

initialize

is

don~

by

TUS8

should

packet

R1

by

the

by

sending

status

PACKET+2

to

the

RO

and

return

Initialize

TUREAD, TU58

causing

two INIT

reply

with a CONTINUE

code

TU58.

status

the

TUWRIT,

to

Its

a fram1ng

pack~ts

Initialize

,

If

Initialization

,

return

,

set

RO

II:

;

,

HI

=

,

R2

II:

,

send code

,

in~icat.

,

get

:

return

TU58

TUSE!K,

power-up

~rror

to

error

op-code

address

length initial

the

packet

to

caller.

no

the

€nd

to

and

state.

In

th~

the

packet.

the

code

of

checksum

byte packet

caller

TUDIAG

TUS8,

TU58.

TU58

failed, to

packet

pre-read

caller

!HIT:

, Send

,

lOS: 208:

CLR MOV

BREAk.

MOV

PUTSYT SOB CLf!

TSTB

RO .8.,

Rl

II,

UDLXCSR

18.,

R2

.,0

R2, 20$ UDLXCSR ..

OLRBUF

,

a.sum~

r~try

;

,

start

,

s~nd

stop

remov~

;

C-12

success

eight

sending a break

nullS

s~ndlng

times

for 8 Character

any

tne

extran~oUI

break

before

input

failure

t1mes

byte

I Send two INIT

I

see

,

:

Retry

,

9981

PUTBYT PUTRYT

if

TU58

GUBYT CMPS BE-Q SOB

falled. MOV

RETURN

paekets.

,'.INIT

IF

.UllT

sent a Continue

R2

....

R2,

99. Rl,

Return

.-127.,

CO~T

lOS

error RO

paeket

status

to

,

caller.

send

two INIT

get a byte

If

CONT1NUE

r~turn

else

to

retry

paekets

fro.

~ac~et,

ealler

TUS8

,+

I

SNDPKT

I

,

Description

,

;

I

,

Inputsl

;

I

,

Outputs:

,

,-

SMDPKt':

, Send

,

IOU

2081

30$1

.SBffL

SNDPKT send a mUlti-byte SNDPKT checksum

RO Rl R2

None

CLA

bytes

COM BEQ CLF<

MOVe BA

MOve

ADD ADC PUTBYT SOB

address

=

number

=

the

=

already

to

SNDPKT

is

called

will

to

Initial

-(SP)

TUS8.

(SP)

20s

WORD

(RO), lOS

(RO),

WORD,

R2

(ROH

Rl,

also the

of

been

lOS

Send a

by

packet

compute

TU58.

bytes

checksum

sent)

Update

ilOilO

WORD+l R2

packet

TUREAD,

(either

the

to

send

to

send

(non-zero

16-blt

to

TUS8

IUWRIT,

Control

packets

,

Checksum

,

I

,

;

,

I

TUSEEK,

checksum and

If

make

after

flip

branch

set

up

with

s·tore Update cnecksum with send loop

and

or

Data)

part

of

the

oddleven

eaeh

oddleven

if

second

byte

first

second

end-around

tne

until

pair

byte

data

byte

TUDIAG

to

the

send

packet

byte

fllp-flop

byte

flaq

byte word

of

pair

of

carry

byte

count

to

TUS8.

the

palr.

of

pair

is

has

pair

Zero

(SPH

40.

WORD,

R2

R2 R2

R2

GEftND

R2

Cheek

40$1

TST BEQ AOD ADC PUTBYT SwAB PUTBYT RETURN

.SBTTL

,+

I

G!TEND

,

Description.

,

GETEND an

End

15

called

Control

by

paeket

for

TURElD,

from

End

PaCket

TUWRIT,

the

if

I

update send

return

TU58.

C-13

odd number

computed cheeksum

16-blt

TUSEEK,

GETENO

to

ealler

and

v~rifles

eheeksum

of

data

TUDIAG

bytes,

to

that

accept

the

, , word

I

,

Inputs:

,

I

,

Outputs.

1

I·

GETEND:

,

If

I

IOU ,

Verify

,

received

RO

RO = 16-bit

flao

byte

TSTB

BNE

GE'l'Bn

that

ClifPS

aNE

G£TeYT

C"P8

ShE

GUBY!-

CfilP8

BNE

GETSYT

BIC

MOV

S"AS ADD ADC

packet

in

the

= a

byte

was

RO lOS RO

the

packet

RO,

908

RO RO,

908

RO

RO, to.END ; and

908

RO ,AC<377>,

RO,

AI

'10.*256.+0.ENO+F.CTRL, Rl

packet

already

status

not

pre-read

.r.CTRL

UO.

Rl

is

indeed

equals

read

by

code

by

comlnQ trom

RO

an

End

the

caller,

the

packet,

computed

caller

read

1£

read

TUSS

check

.

,

with

qet

I

,

clear

;

form

,

form

Rl

.

,

from

and

checksum.

or

zero

it

not

pre-read,

it-

Is

Indeed

Control

lenQth

oP-code success

hi-byte 16-blt 16-blt

bytes

that

now.

=

code cheCksum

cheCksum

already

the

an

End

paCl<et

10.

End

checksum

Control

In

Rl

received

packet.

,

Receive

,

20$1

I

Receive

I

Return

I

908:

1001:

and

MOV G!TSYT GETBYT

ADD ADC

S08

Checksum

G£TaYT

GET8YT

CMP

8EQ

error

Mova

MDVB

RETURN

.END

ignore

14,

wORD

.ORD+l

WORD,

Rl

R2,

WORD WORO+l WORD,

100.

code

,-127.,

RO,

rest

Of

R2

Rl

20$

transmitted

Rl

for

transmission RO

RO

End

packet,

from TUS8 and compare

,

error.

, ;

updatlnq

lOOP

return return

cnecksu~.

four

times

with

status to

caller

to

qet

8.

bytes

computed c-hecksum.

.s

16-blt

value

C-14

APPENDIXD

CARTRIDGE REPAIR

D.l INTRODUCTION

Under unusual circumstances of the hub. The tape tape's wrap around itself. The procedures for looping the tape back onto the hub are given here to help the user prevent the proper handling and backup copying. Two procedures are given here. tridge and the other

These are moderately difficult procedures requiring the use of small tools. Minimum tools are a number

1

Phillips head screwdriver and a small probe (a straightened paper clip can be used). Tweezers are

helpful.

is

loss

is

for the plastic-base cartridge.

of

controller failure or cartridge mishandling, the tape might come free

not fastened to the hub but

of important data. They are not a substitute for the customary precautions of

is

held in place by the elastomer belt and by the

One

is

for the metal-base car-

NOTE

Keep

magnetized tools away from the bulk

and do not touch the tape surface except

tape

ends because fingerprints cause errors.

paper clips stick to a tool, it is magnetized.)

(If

of

the

at

tbe

staples or

D.2 METAL-BASE CARTRIDGE

1.

Open the cartridge by removing the four baseplate Phillips head screws (Figure D-1) and set it upright

on

the work surface with the cover still

Figure

D-l

Baseplate

000

Screw

on.

@

®

/

MA·2361

Locations

2.

Lift the cover off.

NOTE

To remove the head gate, swing it out to clear the tape before

lifting it

up.

Its replacement is optional.

A spring is in the bottom

3.

Thread the end of the tape around the tape guides (Figure D-2).

ELASTOMER

BELT

TAKE-UP -+--+--1 HUB

TAPE GUIDE

4.

Moisten the end

Figure

0-2

Threading the Metal-Base Cartridge

of

the tape with water to get it to stick to the hub.

DRIVE ROLLER

of

the gate. (Figure

0-3).

SUPPLY HUB

TAPE GUIDE

MA-2312

5.

With a small amount

operate the drive roller with a finger to take up the tape.

some back tension on the tape. This keeps

6.

Continue to wind. Watch for the loose ends as it comes around. tuck it under the next turn of tape with the probe. (Back up if the end

7.

Continue to wind a

8.

Hold the takeup hub and drive roller fixed, and rotate the supply hub to take up the slack.

9. Continue winding the tape about

10.

To reassemble the cartridge, reinstall the gate (if desired) by aligning the long and short ends of

the spring with the long and short ends of the gate, as

11.

Drop the spring into the rotate the long end of the spring around to the slot that

sion of the gate.

12.

Hold the gate halfway out

of

slack

at

the free end, insert the end between the hub and belt and

As

soon

as the tape

it

feeding straight into the hub.

If

it separates from the hub,

is

too long.)

few

more turns with the drive roller while applying tension to the tape.

20 turns before reassembling.

in

Figure D-3.

well

in the gate. Holding the spring

down

with a thumbnail or probe,

is

at a right angle to the long dimen-

Push the end of the spring into the slot; it should stay there

so

that the gate and the spring end do not touch the tape. Slowly

is

grabbed, keep

by

press the gate down onto its pin on the cartridge baseplate. Reach in with the probe and press

It

will

the spring down.

clear its holding slot and snap into position, closing the gate.

itself.

0-2

MA-23&8

Figure 0-3 Head Gate and Spring

13.

Carefully lower the cartridge cover into place and reinstall the screws.

0.3

PLASTIC-BASE CARTRIDGE

Open the plastic-base cartridge case by removing the four baseplate Phillips head screws (Figure D-l). Carefully remove the top.

0.3.1 Preparation for Threading

The four rollers and tape hubs in the plastic-base cartridge are held in their operating plane by the top and bottom of the case together. the elastomer belt can get folded

1.

To organize the parts for threading, remove and discard the head gate and spring. Take the

When the top

under the hubs.

is

off, the various parts tend to creep out of position, and

empty tape hub from the case and set it aside.

2.

Remove the floating roller (Figure D-4).

ELASTOMER+----BELT

Figure 0-4 Stretch the Belt with the Floating Roller

..

MA·2355

0-3

3.

Rearrange the elastomer belt around the drive roller and the supply hub.

4.

Put the takeup hub

5.

Put the empty tape hub

6.

Using the top to hold the floating roller, belt and supply hub down, use a straightened paper clip or pencil to guide the elastomer belt around the hub. The hub should seat against the base with the belt around it.

D.3.2 Threading the Cartridge

1.

Pull several centimeters (a (Figure

D-5).

Hold all parts the hubs

slip. Then the procedure must

graph D.3

on

its

on

will

pin.

its pin.

few

inches) of tape off the supply hub and through the tape guides

NOTE

down

when

creep

moving

up

the pins and cause the belt to

them. Otherwise,

be

restarted

at

Para~

.•.

TAKE

HUB

Figure

2.

Moisten the end of the tape with water to get

3.

With a small amount of slack

D-5

Threading the Plastic-Base Cartridge

at

the free end, insert the end between the hub and belt, and

it

to stick to the hub.

SUPPLY

HUB

operate the floating roller to take up the tape.

4.

As

soon as the tape

is

grabbed, keep some back tension

on

the tape. This keeps the tape

feeding straight into the hub.

5.

Continue to wind. Watch for the loose end as it comes around.

If

tuck it under the next turn of tape with the paper clip. (Back up if the end

it separates from the hub,

is

too long.)

6.

Continue to wind a

7.

Now hold the take up hub, drive roller, and floating rollers fixed and rotate the supply hub to take up the slack.

few

more turns with the floating roller while applying tension to the tape.

]),4

D.3.3 Closing the Cartridge

on

Place the top back

in

pressed

slightly to clear the bottom. Reinstall the four baseplate screws.

the cartridge.

Do

not reinstall the head gate. The mirror

window

may need to be

Now use a finger to operate the drive roller and wind the tape about before inserting the cartridge into a drive.

NOTE The only reason for performing this exercise copy the data from the injured tape as soon as sible. Discard the cartridge after copying.

20 turns onto the takeup hub

is

to

pos-

0-5

FIELD

REPLACEABLE

UNIT

APPENDIXE

SPARES

LIST

Module

Serial Controller Regulator

Drive Tachometer Encoder Wheel Tape Cartridge

Module

Board

DIGITALP/N

54-13489 54-13609 70-15510 74-20649 36-15809

Option

TU58-XB TU58-XA TU58-K

Name

B-1

Digital

Equipment

Corporation.

Maynard,

MA

01754

Digital Equipment TU58 DECtape II User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual