Brainboxes IE-285, IE-296, PC ELITE User Manual

BRAIN BOXES______________

PC ELITE

4.6 EDITION March, 1995

Guarantee.

FULL 36 MONTHS GUARANTEE.

BRAIN BOXES guarantee your IEEE 488 Interface Board and Soft-

ware for a full 36 months from purchase, parts and labour, provided it

has been used in the specified manner. In the unlikely event of failure

return your IEEE 488 Interface and Software to BRAIN BOXES or

to your Dealer, with proof of purchase, who will determine whether

to repair or replace this product with an equivalent unit.

COPYRIGHT.

COPYRIGHT © 1985-1997 BRAIN BOXES.

All rights reserved. No part of this hardware, circuitry or manual may

be duplicated, copied, transmitted or reproduced in any way without

the prior written consent of BRAIN BOXES.

PC Elite is designed, manufactured and supported by

BRAIN BOXES.

Unit 3C, Wavertree Boulevard South,

Wavertree Technology Park,

Liverpool, L7 9PF,

England.

Telephone: [phone]

Fax: [phone]

E-mail: [e-mail]

[e-mail]

Web: www.brainboxes.com

ACKNOWLEDGEMENTS.

BRAIN BOXES is a trademark of BRAIN BOXES.

IBM, Commodore, COMPAQ, Olivetti, AMSTRAD, Hewlett

Packard, H.P. and EPSON are trademarks of the relevant compa-

nies. OS/2 and Microchannel Architecture are trademarks of IBM.

Windows is a trademark of Microsoft.

PC Elite Reference

Warning!.Warning!._________

Unauthorised copying of Pro-488 is a crime!
Although public domain programs allow unlimited copying,
and much commercial software allows copying provided the
program purchased is only in use on only one machine at a
time, many programs specifically forbid copying of
proprietary material. The copyright laws of most countries
forbid unauthorised copying of computer programs without
the authors permission. Thus you will be committing a crime
when unlawfully copying programs from one machine to
another, and so will be liable to arrest.
Software authors, like the author of Pro-488, earn their
living from revenue due to sales of their programs, it is
legally and morally wrong to steal their income by misuse of
a computers copy routines. In these circumstances you
should buy extra copies of the program.
Don’t make yourself in to a thief! Moral debilitation will
result from habitually committing these crimes. You have
been warned.!

Licences allowing multiple copies of Pro-488 are available
from your supplier!

33

PC Elite Reference

Thank You For Buying The

PC Elite IEEE 488

Interface!

We proudly present the PC Elite IEEE 488 Interface Board.
PC Elite IEEE 488 gives the PC user precise control over

the huge range of industry standard IEEE 488 devices.

Your board is designed and manufactured in England, and
our policy is one of complete support to our dealers and direct
to our users. Please note, PC Elite is designed ’in house’ and is
completely understood by our staff. Its great strength is the
software support we give it. Our intention is to supply the
software and any technical information you may need to allow
you to exercise complete control over the PC Elite IEEE board
and IEEE devices. After searching the manuals, do not hesitate
to contact us on our HOTLINE numbers given on Intro Page-2
if you need help.

We are particularly keen to provide new operating system
or language drivers to expand the range of applications using our
PC Elite IEEE board.

We trust that if you adhere to the following procedures you
will enjoy many years of useful service from your IEEE 488
interface.

44

PC Elite Reference

PC Elite MANUAL_________________

The Layout Of This Manual._________________________

This manual is a complete description of how to install and

configure the PC Elite IEEE interface board.

The PC Elite card, like our PC IEEE board, is an extremely
easy to use and understand implementation of the IEEE-488
interface for IBM PC and compatible computers. We have truly
tamed the PC and the GPIB BUS allowing you to get the most
out of your IEEE devices!

Chapter 1, Joining The Elite, discusses the features

of the Elite card, mentions programs and languages that will
drive the Elite card and explains its how its high specification
custom design whilst retaining exact compatibility with other
manufacturers designs gives it extreme flexibility in its
application and use. Finally, the perfect companion product for
the Elite card, the Professional 488 Device Driver development
environment is introduced.

Chapter 2, Installation Guide, shows you how to

configure and install the PC Elite board in one of the expansion
slots of your computer.

Chapter 2, The Technical Details, gives much

technical information on the Elite card. Whilst most users will
find this information be be unnecessary it is included to make
this manual as complete as possible, to allow you to cover every
eventuality.

The Cumulative Index covers the complete contents of

the manual.

55

PC Elite Reference

Contents________

Chapter 1 Joining The Elite.

Introduction. 1
What Machine Do You Need? 1
Elite Features. 2
Interrupt Selection. 2
Direct Memory Access Channels. 2
Address Switches. 2
Software Support. 3

Introducing Professional 488. 3

Outline. 4
The Professional-488 Environment. 4
Learn How To Use It In Minutes. 5
Basic ON SRQ Facility. 5
PRO-488 Command Summary. 5
Sending Data To Bus Devices. 6
Receiving Data From Bus Devices. 6
Program Examples. 6

Quick Basic Example. 7
Turbo Pascal Example. 7
Microsoft \ Lattice C Example. 7
Fortran Example. 7

IEEE Bus Commands And Functions. 8
GPIB.COM Driver. 9
Documentation, Cabling and Technical Backup. 9

Chapter 2 Installation Guide.

Introduction. 10
Configuring The PC ELITE IEEE Board. 10

The DIP Switches And Jumper Blocks. 11

Setting The I/O Address. 11
Interrupt Selection. 13

Setting The Interrupt Jumper Block. 13

Setting The Interrupt Clear Address. PC2A Only 15
DMA Selection. 15

Setting The DMA Jumper Block. 16
Using More Than One PC ELITE IEEE Board. 17
Installing The PC ELITE Board In The Computer. 18

66

PC Elite Reference

Connecting To IEEE Devices. 20
Problems! 22

Chapter 2 List Of Figures.

Figure 2-1. The ELITE Factory Set DIP Switches. 12
Figure 2-2. Valid PC ELITE IEEE Base Addresses. 12
Figure 2-3. The IRQ Jumper Block. 14
Figure 2-4. The PC2a Mode IRQ Clear Address. 15
Figure 2-5. The DMA Jumper Block. 16
Figure 2-6. Remove Cover Mounting Screws. 18
Figure 2-7. Removing The PC Cover. 18
Figure 2-8. Removing Blanking Cover. 19
Figure 2-9. Inserting The PC ELITE IEEE Card. 19
Figure 2-10. An IEEE Cable. 20
Figure 2-11. Connecting The PC To The IEEE Bus. 21
Figure 2-12. Standard IEEE 488 Connector Pinouts. 21

Chapter 3 Technical Details.

Introduction. 23
Specification. 23
Hardware Specification. 23
The NEC 7210 Chip. 24
The PC Elite Subsets Supported. 25
NEC 7210 Register Map. 26
The I/O Address Base Address. 27
Interrupt Selection. 28
SRQ Service ReQuest. 29
The Auxiliary Mode Register. 29
IFC InterFace Clear. 30
REN Remote ENable. 30
ATN ATteNtion. 30

Chapter 3 List Of Figures.

Figure 3-1. PC Elite Board Interface Capability. 25
Figure 3-2. PC2a Mode NEC 7210 Register Map. 26
Figure 3-3. Read Register Bits. 27
Figure 3-4. Write Register Bits. 28
Figure 3-5. Interrupt Status Bits. 29

77

Join The Elite. PC Elite Reference

CHAPTER 1

JOINING THE

Elite.

Introduction.____________

This chapter, Joining The Elite, discusses the features of
the Elite card, mentions programs and languages that will drive
the Elite card and explains its how its high specification custom
design whilst retaining exact compatibility with other
manufacturers designs gives it extreme flexibility in its
application and use.

Finally, the perfect companion product for the Elite card,
the Professional 488 Device Driver development environment is
introduced, it is a simple straight forward method for writing
both DOS and Windows programs. Pro-488 is available as a
stand alone product and is especially cost effective when bundled
with an Elite card or sold with a site licence.

An alternative software interface is available for the Elite
cards, our GPIB.COM driver. Our GPIB.COM has the same
calling mechanism and conventions as the widely available NI
product. Use GPIB.COM to maintain backwards compatibility
with existing applications.

What Machine Do You Need?__________________________

The PC Elite IEEE board and software will run on any
industry standard PC compatible including the 386, 486, DX2
and Pentium machines.

The PC Elite card will fit in the half size or full size slots
on your computer. You can use any version of DOS, Windows
or OS/2 in a DOS window.

Use our PS Elite/2 card with Micro Channel Architecture
bus computers.

Chapter 1 1-1

PC Elite Reference Join The Elite.

Elite Features._____________

The PC ELITE card extracts the ultimate IEEE-488
performance from your Personal Computer. Using 4 custom
programmed logic chips we have taken PC based IEEE cards to
the limit. PC ELITE is a half size card that fits any PC or AT
slot. ELITE has the complete Controller, Listener and Talker
ability. True flexibility with a choice of 3 DMA channels, 10
interrupt lines and 7 I/O addresses.

Elite is based on the highly popular NEC 7210 GPIB
Controller chip, with 4 supporting custom programmed logic
chips controlling DMA, Interrupt sharing and address decode.
DMA data transfer rates exceed 300K bytes per second. The
ELITE card is as rugged as your PC.

Interrupt Selection._________________

The interrupt hardware allows jumper selection of one of
ten PC interrupt request lines, IRQ2 to IRQ7, IRQ10 to IRQ12
and IRQ15. The PC ELITE interrupt logic allows interrupt
sharing with third party cards. 13 interrupt sources are software
selectable providing ultra-flexible interrupt driven data transfers.

Direct Memory Access Channels._____________________________

The DMA hardware allows jumper selection of one of
three PC direct memory access channels for high speed data
transfers, DRQ1-3. The PC ELITE allows DMA interrupt sharing
with third party cards. DMA data transfer rate exceeds 300K
bytes per second.

Address Switches.________________

The DIP switches give the ELITE card the choice of 7 i/o
addresses 02E1H, 22E1H, 42E1H, 62E1H, 02B8H, 02C0H or
0300H. Elite is switchable between PC2 and PC2a compatibility.
Four ELITE cards provide access to 56 IEEE instruments.

1-2 Chapter 1

Join The Elite. PC Elite Reference

Software Support.________________

The low cost and high performance of PC data acquisition
and analysis software packages combined with the ELITE card
makes them ideal as powerful and inexpensive instrument
controllers. Keep your technology advancing whilst your capital
investment stays low!

PC ELITE is fully compatible with Lotus Measure,
LabTech NoteBook, Asyst, DaDisp, DaDisp 488, Lab Windows,
Test Windows, Unkelscope, TBasic, True BASIC, National
Instruments IEEE software, IBM’s own GPIB software and all
software that supports the IBM GPIB card.

The ELITE card will run many of the above programs
without any modification.

Some of the above software eg Lab Windows requires the
use of a driver similar to the NI GPIB.COM drivers allow this.
We have written our own GPIB.COM style drivers in house.
The GPIB.COM driver for DOS is order code IE-736. The
GPIB.COM driver for WINDOWS is order code IE-747. More
details about GPIB.COM are given later in this chapter.

To run Elite under Windows or under DOS with
QuickBasic, Pascal, C, Assembler, Fortran etc use the
Professional 488 driver available from your dealer.

Introducing Professional 488.__________________________

The perfect partner for the ELITE card is Professional-488,
the best PC based IEEE software in the world! Pro-488 makes
the ELITE card an integral part of your PC, controlled by an
enhanced Hewlett Packard style syntax that runs all DOS
languages. Pro-488 makes ELITE compatible with Windows,
Visual Basic, Visual C++, Turbo Pascal for Windows, DOS
BASICA, GWBASIC, Complied BASIC, Quick Basic, Turbo
Basic, Turbo Pascal, Turbo C, Lattice C, Aztec C, Zortech C,
Prospero Pascal, Microsoft C Pascal, MS Fortran, MS
Assembler, FS Fortran and many more languages.

Chapter 1 1-3

PC Elite Reference Join The Elite.

Outline._______

The Professional-488 software system allows any PC with
an IEEE-488 interface to become an IEEE bus controller,
exercising complete control over a bus full of up to 14 IEEE
instruments. An easy to use, flexible, enhanced industry standard
control language addresses the IEEE devices and provides
complete instrumentation control. The heart of the Pro-488 is the
device driver software that loads automatically when your PC is
switched on. After that, your PC has access to an IEEE port in
the same way as the other resident ports LPT1 or COM1. The
Professional-488 Device driver makes full use of all the
advanced features of your PC. We believe that software sells
hardware and that is why we made Professional-488 the perfect
companion for PC ELITE IEEE and PC IEEE cards.

The Professional-488 Environment._______________________________

Profession-488 is the ideal development environment for
IEEE based data acquisition and control. Pro-488 is more than
just an instrumentation shell, its a mature carefully thought out,
PC based implementation, of a superset of Hewlett Packard’s
HPIB language. The commands and your programs read just like
plain English and so program development and maintenance time
are cut to an absolute minimum. Since your time is extremely
valuable we made Pro-488 code easy to write, simple to debug
and a pleasure to read. Pro-488 runs identically across the range
of DOS languages. The syntax, parameters and returns of the
Pro-488 system remain the same, independent of the language
that you are running. No extra language drivers or run time
modules are needed to implement a new language. So you can
use the IEEE system with the language of your choice. The bus
status string contains a wealth of information about the state of
the IEEE bus and is easily processed in any language. Pro-488 is
feature rich, with a wide range of commands, from the lowest
level, of individual line control, right up through single word
commands that perform or initiate whole sequences of bus
actions. Its IEEE-488 without the sweat!

1-4 Chapter 1

Join The Elite. PC Elite Reference

Learn How To Use It In Minutes._____________________________

Since the Professional-488 talks the established IEEE
control language, you probably already know how to use it! A
good way of learning how to use the Professional 488 is inter­actively from the keyboard of your Personal Computer using the
GPIBTALK suit of programs. Included on the Professional 488
system disk is the source code, and the ready run versions of,
GPIBTALK in each of four languages. ATALK in Assembly
language, CTALK, PASTALK and GPIBTALK in GW-BASIC
and BASICA. These powerful programs are a menu driven sys­tem that allows you to send IEEE commands, transmit and
receive data from your bus devices and check the status of the
GPIB interface bus, all at the touch of a single key. In this way
the user can get a good feel of the power and ease of use of the
Professional 488 command language in a very short time. Most
IEEE equipment includes worked examples that are virtually
word for word PRO-488 commands!

Basic ON SRQ Facility._____________________

From BASIC the ON PEN GOSUB command can be used
to invoke an SRQ service routine to provide automatic serial
polls etc.

PRO-488 Command Summary.___________________________

The basis of the PRO-488 system is an intelligent
command handler. Data written to the "IEEECTRL" file is
treated as an Ascii string containing IEEE bus keywords and
parameters. These keywords are commands to perform Serial or
Parallel Polls, send any IEEE bus commands or specify the
timeout period, etc etc.

The command interpreter checks the syntax of your IEEE
string and performs the appropriate IEEE actions. If a syntax
error is detected the precise location of the error is noted and a
flag is set. Merely checking the error flag informs you whether

Chapter 1 1-5

PC Elite Reference Join The Elite.

any mistake was made, other flags show whether a device is
present on the bus and the state of the data transfer.

Sending Data To Bus Devices.__________________________

Data can be sent to the IEEE bus devices in several ways.
The simplest and most straight forward method is by writing
data to the "IEEEDATA" file, PRO-488 automatically addresses
the current device to listen and the PC outputs your data, as easy
as that!

Alternatively, data can be sent via the "IEEECTRL" file
using one of three methods:- as specified by decimal numbers
after a DATA or EOI command, as literal data within delimiters
after a STRING command, or as literal data within delimiters
after an OUTPUT command.

LISTEN 5 DATA 72,69,76,76,79 UNL <CR>
LISTEN 5 STRING "HELLO" UNL <CR>
OUTPUT "HELLO" <CR>

Receiving Data From Bus Devices.______________________________

Data can be input from the current IEEE bus device by a
read of the "IEEEDATA" file, just like reading disk data!

Alternatively, data can be requested from any IEEE bus
device, via the "IEEECTRL" file using the ENTER command.

ENTER 200 <CR>

Both these methods are very flexible, a complete bus
handshake sequence is performed with the current device being
addressed to talk. The input sequence is terminated by the
receipt of the number of bytes specified or by EOS received.

Program Examples._________________

Here are four example programs that demonstrate the
power and ease of use of Pro-488. Each places a D.V.M. under
PC control, programs the meter’s range and function with the

1-6 Chapter 1

Join The Elite. PC Elite Reference

R3T3X command, inputs a reading from the D.V.M. and then
displays it on the PC screen.

Quick Basic Example.___________________

10 OPEN "IEEECTRL" AS #1
20 OPEN "IEEEDATA" AS #2
30 PRINT#1,"REMOTE 5 OUTPUT ’R3T3X’"
40 READING$=IOCTL$(2)
50 PRINT READING$

Turbo Pascal Example._____________________

VAR

buffer : String[255];
ieeedata,ieeectrl : Text;

BEGIN

Assign(ieeectrl,’IEEECTRL’);
Rewrite(ieeectrl);
Assign(ieeedata,’IEEEDATA’); Reset(ieeedata);
Writeln(ieeectrl,’REMOTE 5 OUTPUT "R3T3X"’);
Readln(ieeedata,buffer);
Writeln(buffer);
Close(ieeedata); Close(ieeectrl);

END.

Microsoft \ Lattice C Example.___________________________

#include <stdio.h>
int ieeedata,ieeectrl;
char buffer[255];
void main(){

ieeedata=open("IEEEDATA",O_RDWR O_BINARY);
ieeectrl=open("IEEECTRL",O_RDWR O_BINARY);
write(ieeectrl,"REMOTE 5 OUTPUT ’R3T3X’\n",24);
read(ieeedata,buffer,255);
printf("%s\n",buffer); }

Fortran Example.________________

CHARACTER BUFFER*255
OPEN(1,FILE=’IEEECTRL’,STATUS=OLD, ACCESS=’SEQUENTIAL’)
OPEN(2,FILE=’IEEEDATA’,STATUS=OLD, ACCESS=’SEQUENTIAL’)
WRITE(1,*)"REMOTE 5 OUTPUT ’R3T3X’"
READ(2,*)BUFFER
WRITE(*,*)’’,BUFFER

Chapter 1 1-7

PC Elite Reference Join The Elite.

IEEE Bus Commands And Functions._________________________________

ABORT Resets bus, pulse IFC, assert REN, assert ATN.
BASE= Sets the IEEE board base i/o address.
CLEAR Returns some or all devices to predetermined state.
CONFIGURE Specifies how device responds to PPOLL.
DISABLE Prevents some or all devices responding to PPOLL.
END= Sets End of Sequence method for OUTPUTs.
ENTER Ask for data from IEEE device.
EOS= Specifies EOS byte for IEEE data INPUTs to PC.
INIT Restores IEEE bus and driver to defaults state.
LOCAL Enable front panel control. REN, ATN sent false.
LOCKOUT Disable front panel controls. Performs LLO.
NO TO Disables time out.
OUTPUT Sends literal data string to addressed devices.
PPOLL Performs a complete Parallel Poll
READ Reads one byte of data from addressed talker.
REMOTE Puts some or all devices under PSI BOX control.
SLAVE Puts PC into peripheral mode.
SPOLL Serially Polls one or more devices.
STRING Sends literal data string to current bus device.
TO Sets an i/o timeout value.
TRIGGER Initiates pre programmed action in devices.
UNCONFIGURE Prevents devices responding to Parallel Poll.
WAIT SRQ Waits till SRQ is asserted by device.
WAIT MLA Waits till PC is addressed to listen.
WAIT MTA Waits till PC is addressed to talk.
NO ATN Set ATN false.
NO REN Set REN false.
LISTEN Sends one or more Listen Addresses.
ATN Asserts ATN line true.
CMD Send byte ATN true.
DATA Send byte ATN false.
DCL Device Clear.
EOI Send DATA with EOI true
GET Group Executive Trigger
GTL Go To Local.
IFC Pulse IFC for 100 microsec
LAG Listen Address.
LLO Local Lockout.
MLA Set/ Send My Listen Address.
MTA Set/ Send My Talk Address.
MSA Set/ Send My Secdry Address.
PPC Parallel Poll Configure.
PPD Parallel Poll Disable.
PPE Parallel Poll Enable.
PPU Parallel Poll Unconfigure
REN Asserts REN line true.
SDC Select Device Clear.
SEC Secondary Address.

1-8 Chapter 1

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SPD Serial Poll Disable.
SPE Serial Poll Enable.
TAD Sends Talk Address.
TALK Sends Talk Address.
TCT Take Control.
UNL Unlisten.
UNT Untalk.

GPIB.COM Driver._________________

Our 100% NI compatible GPIB.COM driver allows you to
maintain and run existing applications developed for use with
any NI card.

GPIB.COM is the binary device driver interface developed
by national Instruments and shipped with every one of their
IEEE cards. A large number of third part applications, as well as
NI’s own Lab Windows and Lab View products have been
written to work with this driver. Our GPIB.COM driver and its
associated BBCONF program are 100% compatible with the NI
driver allowing users to run all existing NI applications without
any change or recompilations whatsoever.

The higher performance Elite card with GPIB.COM allows
migration to a more cost effective platform.

Complete Documentation and Technical Backup.__________________________________________

We believe in supplying complete documentation with
every package we sell. The Pro 488 Driver is no exception, it
has an attractively laid out manual in an A5 binder with slip
case, containing over 400 pages of in-depth technical detail with
comprehensive indexes and table of contents. We guarantee your
Professional 488 Driver for a full 36 months from purchase. A
full technical backup service is available to ensure that you get
the maximum performance out of your investment.

Cabling Requirements.____________________

Try our low profile fully shielded IEEE cables, ideal for
the cramped spaces on the back of some very popular clones.

Chapter 1 1-9

PC Elite Reference Installation Guide

CHAPTER 2

PC ELITE

INSTALLATION

GUIDE.

Introduction.____________

This chapter explains how to configure and install the PC
ELITE IEEE board into an IBM PC computer. Detailed
instructions are given how to set the address select and interrupt
acknowledge DIP switches and how to position the IRQ and
DMA jumpers.

If the PC ELITE IEEE is to be installed in another make
of PC then it may be necessary to consult the instructions
included in that PC’s documentation.

The half size PC ELITE IEEE board will fit into both long
or a short slots, it can be placed in standard 8 bit PC slots or in
the longer 16 bit AT slots. If interrupts 10, 11, 12 or 15 are to
be used then the card must be installed in a 16 bit AT expansion
slot.

If you have a Micro Channel Architecture computer such
as the IBM PS/2 Models 50, 60 or 80 or a Tandy 5000 M.C.
then you require our PS Elite/2 card instead.

Configuring The PC ELITE IEEE Board.____________________________________

In the state it leaves our factory, the PC ELITE IEEE 488
Interface Board is ready to plug straight into an IBM PC
computer.

So, unless you have GOOD REASON, you do not need to
alter its default setting.

2-10 Chapter 2

Installation Guide PC Elite Reference

However, due to the large variety of add-on boards that
may be present in the PC, your PC ELITE IEEE board may
need tayloring to suit your setup.

The DIP Switches And Jumper Blocks.__________________________________

The PC ELITE card has one 6 way DIP switch block, the
switches are clearly marked 1-6. DIPs 1-2 select the PC ELITE
card base address. DIP 3 selects PC2 or PC2a compatibility and
in conjunction with DIPS1-2 determines the cards base address.
DIPs 4-6 are used, in PC2a mode only, to select the interrupt
clear address, they have no effect in PC2 mode.

The PC ELITE card has two jumper blocks, each clearly
marked. One set of jumpers controls the interrupt request
selection the other the DMA channel selection. The IRQ jumper
block, can be set to produce IRQ interrupt signals - such as
when an IEEE device asserts its Service Request line, SRQ, to
signal that it has data ready for the PC. The DMA jumper block
can be set to allow Direct Memory Access i/o under various
circumstances.

These options are communicated by the user to the
computer using the Professional 488 Device Driver software or
via your third party IEEE software using its own set up or
configuration routine.

It is worth noting, that the PC ELITE IEEE i/o address
map, in PC2a mode, is identical to the IBM GPIB and the
classic National Instruments GPIB PC2A board and it will run
ALL software that these boards run. IBM’S GPIB, N.I.’S PC2A,
our PC IEEE and the PC ELITE cards can all co-exist happily
in the same computer provided that they are set to different i/o
addresses.

Setting The I/O Address.______________________

By referring to the PC ELITE IEEE card locate the I/O
Address DIP switches at the lower left hand corner of the board.

Chapter 2 2-11

PC Elite Reference Installation Guide

The PC ELITE IEEE board i/o address can be set to reside
at one of 7 base addresses in the PC. The factory set address,
02E1H, is set as shown in Figure 2-1. DIP switches 1-3 control
the ELITE card i/o base address select. DIP Switch 3 also
determines whether the Elite card is PC2a or PC2 compatible.

Figure 2-1. The ELITE Factory Set DIP Switches.___________________________________________

1-2 I/O Address select

ÚÁ¿

3 PC2- PC2a Select

³ ³ ³

4-6 IRQ Address Select PC2a Mode Only.

³ ³ ³ ÚÄÅÄ¿
³

³ ³ ³ ³

³

å

on

ЪДДДДДД¿
³жжжеее³

æ

off

³

123456

³

АДДДДДДЩ

Factory Set Default Address= 02E1 Hex PC2a
Factory Set Default IRQ Acknowledge= Interrupt 7
Factory Set IRQ jumper select = Interrupt 7
Factory Set DMA jumper select = DMA channel 1.

Figure 2-2. Valid PC ELITE IEEE Base Addresses.____________________________________________

DIP 1 DIP 2 DIP 3 Address Type_____ _____ _____ _______ ____
Off Off Off 02E1 Hex PC2a Default assumed by DRIVER.

On Off Off 22E1 Hex PC2a Elite as IEEE Card Number 2
Off On Off 42E1 Hex PC2a Elite as IEEE Card Number 3
On On Off 62E1 Hex PC2a Elite as IEEE Card Number 4
Off Off On 02B8 Hex PC2 Elite as IEEE Card Number 5
On Off On 02C0 Hex PC2 Elite as IEEE Card Number 6
Off On On 0300 Hex PC2 Elite as IEEE Card Number 7
On On On AVOID DO NOT USE !

If you set the board to a different address to the factory
default then you will need to inform your software that you
intend to run about the new i/o address.

If you using the Professional 488 Device Driver software

2-12 Chapter 2

Installation Guide PC Elite Reference

then to inform the driver of the change in i/o address send the
BASE=22E1H, using the appropriate address, command to the
driver by placing it on the CONFIG.SYS invocation line eg

DEVICE=PRO488.SYS /BASE=22E1H

or after boot time by writing to the IEEECTRL file. The BASE=
command causes the IEEE card to be initialised and it will
become the system controller, the IFC line will be pulsed and
ATN and REN asserted true.

With GPIB.COM run the configuration program BBCONF.
Other software such as Lotus Measure, Asyst etc have their

own configuration routines. For Asyst you must type

LOAD CONFIG.GPB

and follow the instructions as described in Appendix A of the
Asyst GPIB manual.

Interrupt Selection._________________

The PC ELITE card can produce interrupts for one of 13
reasons and its INT line can be connected to one of the ten PC
Interrupt Request lines using the jumper on the IRQ block.

In PC2 mode any of IRQ2-7, 10-12 or 15 may be used.

In PC2a compatible mode, the IRQ hardware is designed
so that the ELITE board will continue to generate irq requests
until the source of the interrupt is cleared. This allows for
interrupt line sharing.

The interrupts are cleared by writing to 02FX where X=2-7
corresponding to the interrupt selected by the jumper on the
board. The position of the jumper MUST match the IRQ level
set in the software and the IRQ acknowledge address set on
DIPs 4-6. Only use IRQs 2-7 in PC2a compatible mode.

Setting The Interrupt Jumper Block.________________________________

For most users the factory set default IRQ 7 is best.

Chapter 2 2-13

PC Elite Reference Installation Guide

Figure 2-3. The IRQ Jumper Block._______________________________

ý

1 1 1 1

ý

5 2 1 0 2 3 4 5 6 7 NORMAL USE OF INTERRUPT.________________________

ЪДДДДДДДДДД¿
³ююююЫююююю³

IRQ2 EGA/VGA CARD, Usually Free

АДДДДДДДДДДЩ

Used by only very few graphics cards.

ЪДДДДДДДДДД¿
³юююююЫюююю³

IRQ3 COM 2

АДДДДДДДДДДЩ

Avoid if COM2 Installed!

ЪДДДДДДДДДД¿
³ююююююЫююю³

IRQ4 COM 1.

АДДДДДДДДДДЩ

Avoid if COM1 Installed!

ЪДДДДДДДДДД¿
³юююююююЫюю³

IRQ5 PRINTER PORT#2 OK for DOS, Windows

АДДДДДДДДДДЩ

Avoid for OS/2, Windows 95, NT & Novell

ЪДДДДДДДДДД¿
³ююююююююЫю³

IRQ6 DISK DRIVE STATUS, AVOID!.

АДДДДДДДДДДЩ
ЪДДДДДДДДДД¿

DEFAULT_______

³юююююююююЫ³

IRQ7 PRINTER#1 OK for DOS & Windows

АДДДДДДДДДДЩ

Avoid for OS/2, Windows 95, NT & Novell

ЪДДДДДДДДДД¿
³юююЫюююююю³

IRQ10 Usually Free PC2 Mode Only.

АДДДДДДДДДДЩ
ЪДДДДДДДДДД¿
³ююЫююююююю³

IRQ11 Usually Free. PC2 Mode Only.

АДДДДДДДДДДЩ
ЪДДДДДДДДДД¿
³юЫюююююююю³

IRQ12 POINTING DEVICE PC2 Only.

АДДДДДДДДДДЩ

Free when mouse is on a COM port.

ЪДДДДДДДДДД¿
³Ыююююююююю³

IRQ15 Usually Free PC2 Mode Only

АДДДДДДДДДДЩ

Note: IRQ0 & 8, timer & clock interrupts, not on expansion bus.

IRQ1, keyboard interrupt, is not on the expansion bus.
IRQ9, best left unexplained, is not on the expansion bus.
IRQ13, maths coprocessor int, is not on the expansion bus.

2-14 Chapter 2

Installation Guide PC Elite Reference

IRQ14 is the AT/386/486 hard disk interrupt.

When in PC2a compatible mode the position of the jumper
MUST match the IRQ level set in the software and the IRQ
acknowledge address set on DIPs 4-6 and IRQ choices are thus
restricted to IRQ2-7.

If in doubt leave in the jumper in the factory set condition,
interrupt 7.

Setting The Interrupt Clear Address. PC2A Only________________________________ __________

When in PC2a mode the interrupt clear address on DIPs 4­6, must be set correctly if the interrupts generated by the ELITE
card are to properly serviced by your software. Whilst DIP
switches 4-6 can be used to select one of 8 different interrupt
clear addresses they should only be set to one of the six valid
addresses and the IRQ jumper MUST be set correspondingly.

When in PC2 mode, DIP 3=ON, then DIPS 4-6 have no
effect.

Figure 2-4. The PC2a Mode IRQ Clear Address.__________________________________________

DIP 4 DIP 5 DIP 6 Interrupt as selected by jumper_____ _____ _____ _______________________________
Off Off Off 0 Not Valid DO NOT USE THIS SETTING !

On Off Off 1 Not Valid DO NOT USE THIS SETTING !
Off On Off 2 Place jumper at Interrupt 2
On On Off 3 Place jumper at Interrupt 3
Off Off On 4 Place jumper at Interrupt 4
On Off On 5 Place jumper at Interrupt 5
Off On On 6 Place jumper at Interrupt 6
On On On 7 Place jumper at Interrupt 7 THE DEFAULT.

DMA Selection.______________

The PC ELITE card can perform its input or output under
DMA control, that is the data moves between the PC and the
IEEE devices in the background whilst the computer is

Chapter 2 2-15

PC Elite Reference Installation Guide

apparently busy doing another job. DMA is ideal for moving
large amounts of data very quickly. The DMA hardware is
designed so that the ELITE board will only generate DMA
requests when the board is programmed to do perform DMA
input or output. This allows for DMA line sharing.

The position of the jumper MUST match the DMA channel

used in the software.

Setting The DMA Jumper Block._____________________________

Two movable jumpers on the DMA jumper block are used
to select the channel for direct memory access. For most users
the best position is the factory default, DMA 1.

Moving the jumper pins select which DMA channel is used
by the IEEE board hardware. The jumpers can be in one of three
positions, see Figure 2-5. The jumpers must be set in pairs, both
jumpers MUST be set in the same DMA channel pair.
NOTE: Do not add an extra jumpers of your own across the
jumper block, it will only cause great confusion.

Figure 2-5. The DMA Jumper Block.________________________________

DMA CHANNEL SELECTION.______________________

ЪДДДДДД¿
³ЮЮюююю³

DMA CHANNEL 1. DEFAULT

АДДДДДДЩ
ЪДДДДДД¿
³ююЮЮюю³

DMA CHANNEL 2.

АДДДДДДЩ
ЪДДДДДД¿
³ююююЮЮ³

DMA CHANNEL 3.

АДДДДДДЩ

2-16 Chapter 2

Installation Guide PC Elite Reference

Using More Than One PC ELITE IEEE Board._________________________________________

Since each PC ELITE IEEE card can control up to 14
separate IEEE devices it is not generally necessary to have more
than one PC ELITE IEEE board installed in the PC at any one
time. However, it is possible to control multiple IEEE buses
from one PC with several PC ELITE IEEE cards.

The golden rules to follow to allow this are:­i.) Ensure that each PC ELITE IEEE card is set to a different

i/o address.
ii.) If you are using the Professional 488 Device Driver then

ensure that the each PC ELITE IEEE card has its own

driver software installed and that the file name associated

with each IEEE port is different.

Professional 488 device Driver requires that the
CONFIG.SYS file must have an DEVICE= PRO488.SYS
statement included for each PC ELITE IEEE card in use. Each
statement must give the individual card i/o address and file
name. E.g. A PC with three PC ELITE IEEE cards controlling
three separate IEEE 488 buses of up to 14 devices each might
have the following CONFIG.SYS file.

DEVICE=PRO488.SYS
DEVICE=PRO488.SYS /"IEEE2 ","IEEEDAT2","IEEECTR2",@22E1h
DEVICE=PRO488.SYS /"COM1 ","IEEEDAT3","IEEECTR3",@42E1h

In this case the first time PRO488.SYS is loaded it creates
a device driver which accesses a PC ELITE IEEE card at i/o
address 02E1h with filename IEEE, the data filename is
’IEEEDATA’ and the control filename is ’IEEECTRL’.
The second time PRO488.SYS is loaded it creates a device
driver which accesses a PC ELITE IEEE card at i/o address
22E1h with filename IEEE2, the data filename is ’IEEEDAT2’
and the control filename is ’IEEECTR2’. The third time
PRO488.SYS is loaded it creates a device driver which accesses
a PC ELITE IEEE card at i/o address 42E1h with filename
COM1, the data filename is ’IEEEDAT3’ and the control
filename is ’IEEECTR3’.

Chapter 2 2-17

PC Elite Reference Installation Guide

Installing The PC ELITE Board In The Computer.____________________________________________

NOTE: Always turn the computer OFF before installing or

removing any interface board from the computer.!!!

After having made sure that the i/o address and the IRQ
and DMA jumpers are correctly set now is the time to insert the
PC ELITE card into the i/o connector slots in the computer.

STEP 1 Before the PC ELITE IEEE board can be installed
the power to the PC MUST be switched OFF!

Figure 2-6. Remove Cover Mounting Screws._______________________________________

STEP 2 Then

using a screw
driver, remove the
cover mounting
screws on the back
panel of the PC
system unit.

Figure 2-7. Removing The PC Cover.________________________________

STEP 3 Next, remove the PC’s cover by sliding it forward and

up. It usually helps to disconnect the keyboard from the PC
since it tends to get in the way when the case is removed.

2-18 Chapter 2

Installation Guide PC Elite Reference

Figure 2-8. Removing Blanking Cover._________________________________

STEP 4 Choose an empty

expansion slot. The PC ELITE
IEEE card will fit either a full
length or a short slot, a 8 bit
PC type slot or a 16 bit AT
type slot. In general it is wise
to leave the larger slots free
for those boards that insist on
greater room. Remove the
blanking cover protecting the
slot on the PC back panel.
KEEP the blanking cover
screw safely for later.

Figure 2-9. Inserting The PC ELITE IEEE Card.__________________________________________

STEP 5 Now insert the PC

ELITE IEEE card in the slot.
Be careful to ensure that the
gold plated pcb fingers fits
neatly into the i/o expansion
connector. Press down firmly
but evenly on the top of the
PC ELITE IEEE card.

STEP 6 The 24 way standard
IEEE 488 connector should fit
neatly through the slot’s
aperture to the outside world.

Use the screw kept back from the blanking cover to screw the
PC ELITE IEEE retaining bracket into the PC back panel
housing.

Chapter 2 2-19

PC Elite Reference Installation Guide
STEP 7 Now replace the system units cover by carefully sliding

in down and back over the system unit. Replace the cover
mounting screws.

STEP 8 After attaching all the monitor and keyboard cables, put
the MS DOS disk in drive A: and power up the PC. Do not
forget the mains power cable!

The PC should power on in the normal way.

Connecting To IEEE Devices.__________________________

The PC ELITE IEEE board connects to IEEE 488 devices
using standard IEEE cables as shown in Figure 2-10.
You may find that our special low profile IEEE cable fits better!

Figure 2-10. An IEEE Cable._________________________

These cables can be ’piggy
backed’ together to daisy chain
up to 14 IEEE devices to the
PC. Connect one end of the
IEEE cable to the IEEE
device.

Our Low profile IEEE cables,
NOT shown, are ideal for
connecting to those tight fitting
clones! Ask you dealer today!

2-20 Chapter 2

Installation Guide PC Elite Reference

Figure 2-11. Connecting The PC To The IEEE Bus.____________________________________________

Connect the other end of the
IEEE cable to the 24 way
IEEE connector on the back of
the PC. Be sure to tighten the
screw locks to ensure a good
permanent connection.

Figure 2-12. Standard IEEE 488 Connector Pinouts._____________________________________________

Pin 1 Data bit 0 Pin 13 Data bit 4
Pin 2 Data bit 1 Pin 14 Data bit 5
Pin 3 Data bit 2 Pin 15 Data bit 6
Pin 4 Data bit 3 Pin 16 Data bit 7
Pin 5 EOI Pin 17 REN
Pin 6 DAV Pin 18 Ground
Pin 7 NRFD Pin 19 Ground
Pin 8 NDAC Pin 20 Ground
Pin 9 IFC Pin 21 Ground
Pin 10 SRQ Pin 22 Ground
Pin 11 ATN Pin 23 Ground
Pin 12 Shield (GND) Pin 24 Ground

Chapter 2 2-21

PC Elite Reference Installation Guide

Problems!_________

If the system fails to power up normally check the
following.
i.) Ensure that the PC ELITE IEEE card is installed

correctly.
ii.) Ensure that other cards in the PC have not been upset.
iii.) Ensure that the power is connected and the PC is

switched ON!
iv.) Ensure that the IRQ jumper block is set correctly (default

NO IRQ).
v.) Ensure that the PC ELITE IEEE i/o address is set

correctly (default 02E1h).

If all these have been checked and the PC still does not
power up the there is probably a conflict of i/o address between
the PC ELITE IEEE board and another board in the PC. Ask
your dealer to check this.

2-22 Chapter 2

Technical Details PC Elite Reference

CHAPTER 3

TECHNICAL

DETAILS.

Introduction.____________

This chapter describes the technical details of the PC Elite
IEEE interface. In particular the NEC 7210 Intelligent GPIB
interface controller chip is described. This information is only of
use to people who are dedicated to understanding everything in
their computer or for those writing IEEE i/o routines at the
assembler level. It is of no concern to the average or more than
average user, who will be accessing the card via Professional
488, Labtech NoteBook or Lotus Measure etc.

Specification.____________

The PC Elite card is totally consistent with all electrical,
mechanical and functional specifications of the IEEE 488 and
ANSI MC1.1 standards. The PC Elite card is compatible with all
revisions of the IEEE 488 standard, including 1975, 1978 and
IEEE 488A-1980 supplement. It is also compatible with the
latest IEEE 488.1-1987 and IEEE 488.2-1992 standards.

PC Elite is also totally consistent with the electrical and
functional specifications of the IEC 625-1 and BS6146 standards,
a simple mechanical adapter is available to interconnect the PC
Elite with IEC 625 devices.

Hardware Specification._____________________

The PC-ELITE IEEE interface based upon the NEC 7210
controller chip. Its IEEE performance is therefore greatly
dependent on the 7210 chip implementation. The computer

Chapter 3 3-23

PC Elite Reference Technical Details

controls the state of the IEEE lines through the 7210 chip. This
chip does not connect directly to the IEEE lines but is buffered
through two IEEE line drivers that provide the correct signal
levels and line matching. The line drivers used are the Texas
Instruments SN75160 and SN75162 IEEE driver chips. These
drivers control the IEEE data and IEEE line management
respectively. The operation of these devices is described in the
device data book, "The Texas Instruments Interface Circuits Data
Book." The SN75160 and SN75162 line drivers are manipulated
using five control lines, TE and PE for the 75160 and TE, DC
and SC for the 75162. All but SC are driven by the 7210 chip.

The Elite card contains 4, large gate count, custom
programmable logic devices, P.L.D.’s. The P.L.D.’s determine
the i/o address of the 7210 chip in the PC’s address space, the
setting of SC, the system controller line, of the Texas
Instruments 75162 GPIB management chip, the enabling and
disabling of the DMA and IRQ lines, the clearing of the IRQ
line and the sharing of the DMA and IRQ lines. Much of the
information about the 7210 chip in this chapter is taken from the
NEC data sheet and is copyright NEC.

The NEC 7210 Chip.__________________

The 7210 TLC is an intelligent GPIB interface controller
designed to meet all of the functional requirements for Talkers,
Listeners and Controllers as specified by the IEEE Standard 488-

1975. Connected between a processor bus and the GPIB, the
TLC provides high level managements of the GPIB to unburden
the processor and to simplify both hardware and software design.
Fully compatible with most processor architectures, Bus Driver/
Receivers are the only additional components required to
implement any type of GPIB interface.

Data may be transferred either under program control or
via DMA using the TLC’s DMA control facilities to further
reduce processor overhead. in addition to providing all control
and data lines necessary for a complete GPIB implementation,

3-24 Chapter 3

Technical Details PC Elite Reference

the TLC also provides a unique set of bus transceiver controls
permitting the use of a variety of different transceiver
configurations for maximum flexibility.

The PC Elite Subsets Supported.____________________________

The IEEE-488 standard specifies various allowable subsets
of interface functions. The actual codes supported by the PC
Elite board is shown below.

Figure 3-1. PC Elite Board Interface Capability.__________________________________________

CODE CAPABILITY DESCRIPTION____ __________ ___________
SH1 Source Handshake. Complete capability.
AH1 Acceptor Handshake. Complete capability.
T5 Talker Function. Basic Talker,

Extended Talker and Talk Only Mode,
Serial Poll,

TE5 Extended Talker. Unaddress if MLA.
L3 Listener Function Basic Listener, Extended Listener, and

Listen Only Mode,

LE3 Extended Listener Unaddress if MTA.
C1 Controller Function. System Controller.

C2 Controller Function. Send IFC and Take Charge.
C3 Controller Function. Send REN.
C4 Controller Function. Respond to SRQ.
C5 Controller Function. Send Interface Messages.

Parallel Poll.
Pass Control.
Receive Control.
Take Control Synchronously.

E2 Tri-State Driver. 500 kilobytes per second up to 20

metres, 1 Megabyte per second as per
IEEE Standard 488 section 5.2.3.

The functions supported by the PC Elite board are a

Chapter 3 3-25

PC Elite Reference Technical Details

comprehensive group allowing full control of the IEEE bus. The
PC Elite have complete controller capabilities and also
implements the full range of talker, listener, serial and parallel
poll, service request, and remote programming functions.

NEC 7210 Register Map.______________________

The heart of the ELITE card is the NEC 7210 GPIB
controller chip which chip has 16 registers, 8 read and 8 write.
The address mapping of these registers is not straight forward.
In PC2 mode, the 7210 register select lines rs0, rs1, rs2 are
connected to the computers address lines A0, A1 and A2. So the
7210 registers occupy 8 consecutive addresses. Thus with a base
address of 02B8h the registers occupy the eight addresses 02B8­02BF hex.
In PC2a mode, the 7210 register select lines rs0, rs1, rs2 are
connected to the computers address lines A10, A11 and A12. So
instead of the registers occupying 8 consecutive addresses each
register is 0400hex apart.
Therefore, if the base address of the card is = 02E1Hex then the
7210 chip registers are as given in Figure 3-2.

Figure 3-2. PC2a Mode NEC 7210 Register Map.__________________________________________

Read Register Address Function_____________ _______ ________
Reg0 02E1H Data In register

Reg1 06E1H Interrupt Status 1 Register
Reg2 0AE1H Interrupt Status 2 Register
Reg3 0EE1H Serial Poll Status Register
Reg4 12E1H Address Status Register
Reg5 16E1H Command Pass Through Register
Reg6 1AE1H Address 0 Register
Reg7 1EE1H Address 1 Register

Write Register Address Function______________ _______ ________
Reg0 02E1H Data Out register

Reg1 06E1H Interrupt Mask 1 Register
Reg2 0AE1H Interrupt Mask 2 Register

3-26 Chapter 3

Technical Details PC Elite Reference

Reg3 0EE1H Serial Poll Mode Register
Reg4 12E1H Address Mode Register
Reg5 16E1H Auxiliary Mode Register
Reg6 1AE1H Address 0-1 Register
Reg7 1EE1H End Of String Register

This address scheme may seem a bit strange but it is
identical to that used by IBM for their board and for the
National Instruments PC2A board and so ensures that the PC
ELITE card is absolutely compatible with these other, older
technology, boards.

NOTE 1: The IEEE input-output is done at the i/o address set

__________

by the DIP switches on the PC Elite board. The
above i/o map is relative to the base address set by
these switches.

The I/O Address Base Address.___________________________

The PC ELITE IEEE board i/o address can be set to reside
at one of 7 base addresses in the PC using the I/O Address DIP
switches at the lower left hand corner of the board. The factory
set address is 02E1H. See Chapter 2 Figure 2-1. The 7210 TLC
register map is relative to the i/o base address set by the address
DIP switches.

Figure 3-3. Read Register Bits.___________________________

REG BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0___ _____ _____ _____ _____ _____ _____ _____ _____
0 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

1 CPT APT DET END DEC ERR DO DI
2 INT SRQI LOK REM CO LOKC REMC ADSC
3 S8 PEND S6 S5 S4 S3 S2 S1
4 CIC /ATN SPMS LPAS TPAS LA TA MJMN
5 CPT7 CPT6 CPT5 CPT4 CPT3 CPT2 CPT1 CPT0
6 X DT0 DL0 AD50 AD40 AD30 AD20 AD10
7 EOI DT1 DL1 AD51 AD41 AD31 AD21 AD11.

Chapter 3 3-27

PC Elite Reference Technical Details

Figure 3-4. Write Register Bits.___________________________

REG BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0___ _____ _____ _____ _____ _____ _____ _____ _____
0 BO7 BO6 BO5 BO4 BO3 BO2 BO1 BO0

1 CPT APT DET END DEC ERR DO DI
2 0 SRQI DMAO DMAI CO LOKC REMC ADSC
3 S8 rsv S6 S5 S4 S3 S2 S1
4 ton lon TRM1 TRM0 0 0 ADM1 ADM0
5 CTN2 CTN1 CTN0 COM4 COM3 COM2 COM1 COM0
6 ARS DT DL AD5 AD4 AD3 AD2 AD1
7 EC7 EC6 EC5 EC4 EC3 EC2 EC1 EC0.

It is recommended that you do NOT attempt to handshake
data into and out from the IEEE bus using your own software
routines as the IEEE bus structure is complicated and the NEC
7210 chip is not trivial to control.

Interrupt Selection._________________

The PC ELITE card can produce interrupts for one of 13
reasons and its INT line can be connected to one of the PC
Interrupt Request lines by placing the jumper on the IRQ block
in the correct place.
In PC2a mode, the IRQ hardware is designed so that the ELITE
board will continue to generate irq requests until the source of
the interrupt is cleared. This allows for interrupt line sharing.

The interrupts are cleared by writing to 02FX where X=2-7
corresponding to the interrupt selected by the jumper on the
board. The position of the jumper MUST match the IRQ level
set in the software and the IRQ acknowledge address set on
DIPs 4-6.

In PC2 mode, there is no interrupt sharing and the IRQ
regeneration and clear logic is disabled.

To enable an interrupt the appropriate bit must be set in
the TLC interrupt mask register, write regs 1-2.

3-28 Chapter 3

Technical Details PC Elite Reference

Figure 3-5. Interrupt Status Bits._____________________________

INT Or of all Unmasked Int Status Bits
CPT Command Pass Through.
APT Address Pass Through.
DET Device Trigger.
END End (END or EOS Message Received).
DEC Device Clear.
ERR Error.
DO Data Out.
DI Data In.
SRQI Service Request Input.
LOKC Lockout Change.
REMC Remote Change.
ADSC Address Status Change.
CO Command Output.

The 13 factors that can generate an interrupt have their
own status bit and mask bit. The interrupt status bits are always
set to one if the interrupt condition is met. The interrupt mask
bits decide whether the INT bit and the TLC interrupt pin will
be active for that condition.

SRQ Service ReQuest.____________________

There is an SRQ input interrupt flag in bit6 of the interrupt
status register 2. This register can only detect a low going pulse
on the SRQ line, NOT its current. By catching each and every
transition the current state is known.

The SN75162 only allows SRQ receive when the computer
is acting as the system controller, ie ALL THE TIME in normal
use.

An IRQ to interrupt the processor can be generated by
SRQ transitions by appropriate setting of SRQI.

The Auxiliary Mode Register.__________________________

The aux mode register controls many of the most powerful
features of the 7210 TLC. It allows it to take control and
become the active controller, it allows it to be the system

Chapter 3 3-29

PC Elite Reference Technical Details

controller. All this done by writing command to the aux mode
register. If only there were a few more commands!

IFC InterFace Clear.___________________

The IFC control line is controlled by the aux mode
register. When the computer is acting as the system controller, ie
ALL THE TIME in normal use, the IFC line may be asserted by
writing 01bh to the aux mode reg. To return the IFC line high
write 013h to the aux mode register. In practice, this IFC line
should only be toggled low for short time and then returned
high. The standard pulse time is a minimum of 100 micro
second.

In normal use IFC should be held HIGH. Only pulse IFC
when you need to assert control of the bus due to a device crash
etc.

REN Remote ENable.___________________

The REN line is controlled by the aux mode register.
When the computer is acting as the system controller, ie ALL
THE TIME in normal use, the REN line may be asserted by
writing 01fh to the aux mode reg. To return the REN line high
write 017h to the aux mode register.

ATN ATteNtion._______________

The IEEE ATN line is controlled by the aux mode register.
When the computer is acting as the controller in charge, ie ALL
THE TIME in normal use, the ATN line may be asserted by
writing 011h, 012h or 016h to the aux mode reg. To return the
ATN line high write 010h to the aux mode register.

3-30 Chapter 3

Index PC Elite Reference

Index.______

Abort.................................8

Active controllr.................29

Asyst.................................3, 13

Auto serial poll.................5

Backup..............................9

Base address.....................11, 12, 26, 27

Base=................................8, 13

Bbconf..............................9, 13

Buffer buffered.................7

Cable.................................20, 21

Clear................................. 8, 11, 15, 28, 29, 30

Config.sys.........................13, 17

Configure..........................8, 10

Connecting........................20, 21

Copyright..........................24

Cover................................18, 19, 20

Dadisp...............................3

Data rate...........................2

Dav...................................21

Default..............................10, 12, 13, 14, 15, 16, 22

Device clear......................8, 29

Device=............................17

Dip switch.........................11, 12

Disable..............................8, 9

Disk..................................5, 6, 14, 15, 20

Dma..................................2, 10-12, 15, 16, 18, 24

Enable...............................8, 9, 28, 30

Eoi....................................6, 8, 21, 27

EOS..................................6, 8, 29

Error..................................5, 29

File name..........................17

Index

PC Elite Reference Index

Fortran..............................3, 7

Gpib.com..........................1, 3, 9, 13

Gpibtalk............................5

Ground..............................21

Gtl.....................................8

Guarantee..........................9

Handshake........................6, 25, 28

Hard disk..........................15

Hardware..........................2, 4, 13, 16, 23, 24, 28

High speed........................2

I/o address.........................8, 11, 12, 13, 17, 18, 22, 24, 27

IBM GPIB........................3, 11

Ieee commands.................5

Ifc......................................8, 13, 21, 25, 30

Installation........................10

Int......................................7, 13, 14, 27, 28, 29

Interface clear...................30

Interrupt............................2, 10-15, 26, 28, 29

Intrrpt sharing...................2, 28

Irq..................................... 10-15, 18, 22, 24, 28, 29

Irq jumpers........................11, 14, 22

Jumper..............................2, 11-16, 22, 28

Lab Windows....................3, 9

Line drivers.......................24

Lotus.................................3, 13, 23

Lotus measure...................3, 13, 23

Low profile.......................9, 20

Lpt1..................................4

Memory............................2, 11, 16

Micro channel...................1, 10

Microsoft..........................3, 7

Index

Index PC Elite Reference

Nat Instrument..................1,3, 9, 11, 27

Ndac..................................21

Nrfd..................................21

On srq...............................5

OS/2..................................1, 14

Pascal................................3, 7

PC ieee..............................4, 11

PC2...................................2, 11-15, 26, 28

PC2a................................. 2, 11-15, 26, 27, 28

Poll....................................8, 9, 25, 26, 27

Printer...............................14

Pro-488.............................1, 3-6,9, 11-12, 17, 23

Prospero............................3

Ps/2...................................10

Quick basic.......................3, 7

Secondary addr.................8

Service request..................11, 26, 29

Speed................................2

Srq....................................5, 8, 11, 21, 25, 29

Syntax error......................5

Systm controllr.................13, 24, 25, 29, 30

Tech details.......................23

Timeout.............................5, 8

Tri-state............................25

Unl Unlisten......................6, 9

Unt Untalk........................9

Version.............................1

Windows...........................1, 3, 9, 14

Index