Radio Shack TRS-80 Model III Operation Manual

\,

I

lIa«llo/haeK

TRS-SO

Operation

A

GuidetoUsing

Connection,

Power-Up and Operation

@)

ModelII

Manual

the

Computer:

CUSTOM MANUFACTURED IN THE U.S.A. BY RADIO SHACK

~

A DIVISIONOFTANDY CORPORATION

Contents

1.

Brief description of basic system 5

2.

Installation , 8

3.

Operation ,..,

Turning the Computer

Using the RESET switch
Inserting a Diskette

Removing a Diskette
Loading the Operating System
Keyboard Operation
Video Display Adjustment

4.

Power-Up Diagnostic Messages

5.

Care and Maintenance ,

Care of Diskettes
Tips

on

Labeling Diskettes

on

10

17
19

6.

-.-

Add-Ons ,

Additional
Additional drives

Peripherals
Other boards

7.

Specifications ,..,.., ,

Display Character Set

Power Supply

Floppy Disk Drive

Serial Interface Signals and Levels

Parallel Interface Signals and Levels

RAM

21

25

3

.--..

..

,.-

j 1/

The
consisting

• a Display Console with built-in disk drive

• a separate Keyboard Enclosure

The
"bootstrap"

Hereisa briefdescriptionofthe functional elementsofthe Computer.

Processor

At
maximum design speed (4 million machine-cycles per second).

The
memory
disk, this
random

Brief

Radio

Operating System softwareisloaded from diskette by a built-in

the

processor receives power-up and reset instructions from read-only

ShackTRS-80 Model IIisa disk-based computer system

of

heartofthe

(ROM).

ROM

access memory (RAM).

Description

two major components:

program.

Computerisa Z-80A microprocessoroperating at its

After the TRSDOS initialization programisloaded from

is electronically switched outofthesystem andreplacedwith

of

,System

Random Access Memory (RAM)

The

basicsystemincludes32K bytesofrandomaccess memory.

An

additional32Kbytescanbeadded, for a totalof64K bytesofaddressable

(lK

RAM.

Video Display

The

Video

processor from display refresh and related tasks.

The

Displayofferstwo modes:80charactersby24 lines, and40 characters by
24 lines.
lower case alphabet, numbers, and special symbols), plus
characters.
white. SeeDisplayable Characters in Section

Display has its own LSI controller chip, to free the Z-80A

The

displayable character set includes the full ASCII set (upper and

32

graphics

Each

charactercan be displayed as white on blackorblack

7.

= 1024.)

on

5

MODEL II OPERATION

Keyboard

The

ModelIIKeyboardhas its ownLSI controllertofree theZ-80Aprocessor

from keyboardscanandrelated tasks.

the

is connectedto
the

Console.

The

Model II has the standard typewriter keys (letters, numbers and
punctuation symbols); however, each
different codes to the Computer, depending on which mode the Keyboard
in: Unshift, Shift, Caps,orControl. In addition, the Keyboard features a
Repeat

Operation.)

key

and

DisplayConsolevia abuilt-incable atthebottomfront

two programmable "function" keys. (See Keyboard

The

Keyboardisin aseparatecase and

ofthese

keys can output several

of

Floppy Disk Drive

The

Model II includes a built-in8"disk drive.
addedinan
special high-densityrecording technique, each diskette can contain 509,184

bytes

diskette.

diskette.)

externalExpansionUnit. (See Section6, Add-Oos.)Becauseofa

of

information, whichismore than 5 times the capacityofa 5-1/4"

(It

wouldtake a70wpm typist 24 hoursoftyping at speed to

Up

to 3 more drives can be

fillan8"

is

Note:

The
System diskette.
storage
for actual diskette space allocation.)

Actual

"SystemDrive" (the one that's built-in) must always contain an Operating

space available to userisdetermined by the OperatingSystem.

The

other

optional drives can de devoted exclusively to the

of

user programs and data. (See the Disk Operating System Manual

Peripheral Interfaces

There

The

(See Section 6,

are four interface connections on the backofthe Display Console:

• Two serial (RS-232-C) Input/Output (I/O) channels
I/O

• A parallel

parallel-interface line printers

• Floppy-disk

Unit

DisplayConsolealsoprovides connectorsand slots for future expansion.

channel, e.g., for connection to TRS-80 standard

I/O

channelfor connectionoftheModel II Disk Expansion

Add-Oos.)

6

BRIEF DESCRIPTION

Display Console

Power Switch for ­Entire System

Drive Release bar

Floppy Disk
Drive

Keyboard Case

Figure 1: TRS-80 Model

11

Reset ­Press up
to reset
computer

Drive Select ­LED-

Lights up
during disk
operation

Keyboard Connector
Cable

(not shown)

7

MODEL II OPERATION

2/ Installation

Carefully unpack theSystem. Remove all packing material andsaveit in case
you

ever

need to transport the System. Be sure you locate all cables, papers,

diskettes, etc.

Place

the

DisplayConsoleonthesurfacewhere you'll beusing the Computer.

The

Computer

won'tbenecessary. (See NotesonAC

should be near a 120 VACoutlet, so that extension cables

Power Sources.)

Notice the cableatthebottomright
jack

on

the right rearofthe Keyboard Case. (See Figure 2.)

Once

connected, the Keyboard Case can be pushed back into the recessed
areaatthe baseofthe Display Console,ormoved to any convenient place
within 2

(For

- 2 1/2 feetofthe Console.

connectionofadditional peripheral equipment, see Section 6, Add-

of

theDisplay Console. Plug thisinto the

Ons.)

Connect
Console.

Figure

the

Connect

3.)

female plugonthe Power Cord to the backofthe Display

the

other

end

to a source of

120

VAC,60Hz. (See

Figure3.Power Cord connectzdto Dis-

play Console

Note:

The

powercord has a three-prong safety plug to provide a reliable

ground

possible, plug it directly into a three-prong socket. Otherwise use a 3-to-2

prong

8

for the system. This groundisvery important to the System.Ifat all

adapter

and

ground the adapter.

Figure2.Display Console connected to
keyboard.

Notes on AC Power Sources

Computers
from very short-duration (millionths

prolongeddropsin current

operatingin the vicinity

be

also
defective switch which arcs when turned on

Your
should eliminate all
still experience power-line interference, you should take some
following steps:

• Install bypass/isolation devices to the noisy appliance

• Fix the defective switch

• Install a separate power line

• Install a special line filter designed for use with computers and other
electronic equipment

In severe conditions, all actions may be required.

Power
choice

serious
an

ideal power-source for your Computer.

aresensitive to fluctuations in thepowersupply at thewallsocket,

of

a second) voltage spikes, to

or

voltage. Thisisrarely a problemunless you are

of

heavy electricalmachinery. The powersupply may

unstable if some applianceoroffice machine in the vicinity has a

or

off.

TRS-80Model II contains a speciallydesigned, built-in

but

the

most severe interference problems. Should you

line problems are rare and many times can be prevented by proper
of

installation location.

the

application, the more consideration you should give to providing

The

more complex the system and the more

AC

or

line filter.

allofthe

It

9

-MODEL

II

3/ Operation

1.

Be

sure all drives in the System are empty, and all

components
System is
Terminator

2.

Turnonthe

the

message
display.
seconds, press
the

Computer
least15seconds

3.

When

the

Disk
other

peripherals.

4.

Insert
drive

door.

system

5.

Before
diskettes
system.

6.

After

any

before

are

turned

present,

plug to

Computer

Ifthe

"INSERT

Expansion

the

System diskette into drive 0

The

and

prompt

turning

from alI drives.

power-down, wait at least15seconds

turning

be sure to connect the Disk

the

(Display Console). Wait until

"INSERT

message fails to

RESET.Ifit stilI fails to appear, turn

off

and

check all connections. Wait at

before

DISKETTE"isdisplayed, turn on

System (if connected) and all

Computer

you to

the

Computer

the

Systemonagain. Start at step

OPERATION

off.Ifno Disk Expansion

Computer.

DISKEITE"

appear

starting over at step

will load the operating

enter

off, remove

Then

appearsonthe

within

the

date

turn off the entire

1.

and

close the

and time.

alI

10

1.

Using the RESET Switch

If

you

should
re-initialize, press
repeat
affected.

Note:

Youdonot

the

power-up

ever

lose

Keyboard

RESET

need

upmomentarily

sequence,

to remove the diskette during this

controloftheSystem,oryou simply

and

release it.

but

the contentsofuser memory will

The

Reset

Computer

sequence.

want

not

to

will

be

10

OPERATION

Notes

on

Diskettes

Diskettesareprecision recording media. Handle them carefully,asdescribed
under

Section5, CareandMaintenance. Be sure youdon't touch the exposed

diskette surfaces.

Before
illustration.)

leave it "write-protected". This way, the Operating System will

inserting the diskette, check the write protect notch. (See

If

you do

not

want to write to that diskette, itisa good idea to

notlet

you

accidentally write to that diskette. To write-protect a diskette, just leave the

(See

write-protect notch UNcovered.

If

you do want to write to the diskette, cover the write protect notch with

Figure

4.)

gummed-foil tape provided with the diskette.

Leave Uncovered
for Write-Protection

Read/Write
Notch

Figure4.A diskette

Note:

or

Any

alterationofthe

programs, requires that the diskette not be write-protected. (Cover the

and

a write-protected diskette.

dataonthe diskette - even the deletionofdata

notch with gummed foil tape.)

Inserting a Diskette

1.Ifthe

2.

3.

4.

drive doorisclosed, openit by pressing the release baruntil thedoor

springs open. (Refer to

Remove

the
the

Gently

Close

the

Operating System diskette from its storage envelope. Grasp

labelsidewith the labelfacing away from the Display andinsertit into

drive slot (see photo).

push the diskette all the way into the slot.

the

door

by moving it toward the left until it clicks into place. Some

Figure 5.)

pressure may be required.

11

MODEL II OPERATION

Removing a diskette

Never removea diskette while the Drive Select light is on, or while a disk file

is Open.

Pressthe Drive ReleaseBar.The

ejected. Carefully remove it, taking care that the shiny diskette surface
doesn't

Note:

door

touch

Once

before

the

chassisordrive door on the way out.

a diskette has been seated in the drive, you must shut the drive

you can remove the diskette.

door

will open andthe diskette will be partly

~\

Figure5.Inserting a diskette (Label

might

extend vertically across the diskette).

Loading the Operating System

When

Operating

As

System bootstrap.

(If

inserted incorrectly. Remove it and re-insert it correctly.)

The
Operating
order

After
Operating

the

Computer

promptsyou

to

INSERTDISKETIE, carefullyinsert the

System diskette into the drive.

soon as you close

nothing

happens

Computer

the

drive door, the Computer will begin the Operating

when you close the drive door, the disketteisprobably

will

then

execute a dignostic program before starting the

System. This lets you verify that the entire systemisin working

- before you

attempt

any data processing.

Completing the Diagnostic Program, the Computer

System. See the OperatingSystem Manual for details.

will

load the

12

MODEL II OPERATION

Keyboard Operation

The

Keys canbedivided into four functional groups: Alphanumerics, Mode-

Select, Numeric Keypad,

and Control Keys, as illustrated below:

Alphanumeric -

just like a
typewriter

Figure6.FunctionalgroupsofModelIIkeyboard.

You

use

the

alphanumeric keys just as you wouldona normal typewriter.
However,
Computer,

eachofthese keys cansendmore than one characterorcodeto the

dependingonwhich

mode

you've selected.

Repeat Key

Numeric Keypad -

for skilled
1O-key operators

13

MODELIIOPERATION

Keyboard Modes

The

table below describes the typical useofthe various modes. This use
determined by the Operating Systemorby the program currently in
execution.

Unsmft - Lets you input lower case letters, numbers

and

unshift punctuation symbols.

Shift - Lets you input capital letters and shift punctua-

tion symbols.
desired key,orpress the key once so the red
light comes on; while that lightison the Keyboard will
output
mode,

only Shifted characters.Toreturn to the Unshift

press again.

Hold

down while pressing the

is

Note:

Caps- Press

come

on. Typically,inthe Caps mode, the alphabet keys

A-Z

send

unaffected.
oncesothe

Control -

oneofthe alphanumerics; this will
code assigned to that key.

The

Shift mode over-rides the Caps mode. So if both

the

capital-lettercodes only,

To

return to the Unshift mode press

red light goes off.

Hold

down the key while pressing

key once and the red light will

and

all other keys are

output

the "control"

~

1![~::;l!1~~

lights are on, the Keyboardisin the Shift mode.

Control Keys

1;'here are13Control Keys. Each key outputs a single control code -

of

regardless
these control codes depends on the Operating System, but here's a
description

what mode the keyboardisin. How the Computer interprets

of

the typical functionofeach Control Key:

and

14

Escape - Usually used to-exit for a subcommand,

ignoring preceding charactersinthe current line.

Tab - Advances the cursor to the next tab position. The

software typically sets

Tab

positionsat 8, 16,24,32, etc.

Control Keys (cont.)

Cancels the last character typed and moves the cursor

back

one

OPERATION

space.

Interrupts anything

returns to the command level.

Pauses execution

a second time to continue execution.

Signifies the
will

drop

two

IMUsil

l§lm3;]

keypad.

Enters
one

space forward.

Cursor Control - Moves cursor back one space without

cancelling previous character.

CursorControl - Moves cursor forward one space with-

out

entering a blank-space character.

Cursor Control - In some programs, moves cursor up

one

line without erasing previously entered characters.

end

to the beginningofthe next line. Note that the

is

for convenient use with the numeric

a space (blank) character and moves the cursor

in

progress

of

the current program. Press

of

the current line.

keys are identical.

in

The

the machine and

Display Cursor

The

rightmost

Cursor Control - In some programs, moves cursor

one line withouterasing previously entered charac-

down

ters; does not signify end-of-line.

Function Keys - Software Programmable. Outputs a

control code which can be used by the OperatingSystem
or

Applications Software for special functions.

15

MODELIIOPERATION

Numeric Keypad

Clustered at
of

number

keys are described above.
are identical to the
row

of

number

these

only. ,

codes

numeric key cluster.

These
skilled lO-key.operators.

the

rightofthe Keyboardisa set

keys, arrow keys and a second

key.

The

arrow keys and [3IiEil

The

number keys

number

the main key cluster- except that

keys numeric character

keys do notaffect the

keys are convenient for data entry by

keysonthe top

~

output

and

from the

Repeat Key

This special convenience key works in con-

junction with any key combination
mode. Simply hold down

you press the desired key(s). While you hold

down these keys, the keyboard will output a

of

steady stream

the desired characters.

1i;J#l:J::rJiill

in

any
while

Video Display Adjustment

Brightness and Contrast controls are located in the recessed area at the
bottom
display quality.

leftofthe Display Console. Adjust as necessary for a comfortable

B

16

4/

Power-Up Diagnostic Messages

Whenever

diagnosticprogramto help insurethatthe system

the

Computer
error
you will lose time

If

oneofthese
Reset
re-appears, consult the table below.

Note: Thisprogram does not check for multiple faults; as soon as a single fault

is found,

DO

the Computeristurned onorReset, it executes a built-in

is

in good working order.

detects a hardware faultorother problem, it will display an

message

the

and

thenstop. This checkout programreduces the chancethat

or

data by using a defective system without knowing it.

error

messagesisdisplayed, the first thing you should do

Computer,

the

Computer displays the appropriate message and stops.

Drive

- Re-insert and reset.
Defective diskette - Try another.
Defective Drive.

and

attempt to duplicate the error.Ifthe message

not

Ready. Improperly inserted diskette

If

is

RS

Non

Radio Shack diskette. Disketteisnot
Radio
mat
reset.

Shack Model II Operating System for-

- Remove, insert proper diskette, and

(Continued on nextpage)

17

ODELIIOPERATION

ROM

(~he(;ksum

E~rro]r.

Defec:tive ROM.

address range

PI

PIO

Chip Failure.

OM

MB

MH

81

RAM

Fault. Defective

X'OOOO'-X'OFFF

RAM

Fault (on 64K systems only). Defective

,

RAM in address range X'8000'-X'FFFF'

SIO Chip Failure.

Before you ask for help

Try

the

that

operation

all power

several times.

and

interconnections are right.

RAMinaddress range

...

Try

using other diskettes. Recheck to see

18

5/ Careand Maintenance

CareofDiskettes

In

general, handle diskettes carefully, using the same precautions you use

with

tape

cassettes and high-fidelity records. A small indentation, dust

particle,

permanently.

•

•

•

or

scratch can render allorpartofa diskette

Keep

the diskette in its storage envelopewhenever itisnot in oneofthe
drives.
Do

not

place a diskette in the drive while you are turning the system on

or

off.

Keep

diskettes away from magnetic fields (transformers,
magnets, TVs, radios, etc.). Strongmagnetic fields will erasedata stored
on

a diskette.

•

Handle
surfaces.
easily.

•

Keep

• Avoid contamination
particles.
Do

•
as a ballpoint

• Storediskettesin a verticalfile folder
from pressure to their sides (just

•

In
Computer

diskettes by the jacketonly.

Don't try to wipe or clean the diskette surface; it scratches

diskettes

not

writedirectly on thediskette jacket with a hardpointdevice such

very dusty environments, you may need to provide filtered air to the

outofdirect sunlight and away from heat.

of

diskettes with cigarette ashes, dustorother

penorlead pencil; use a felt tip pen only.

room.

Do

not touch anyofthe exposed

on

ashelfwhere theyare protected

as

phono records are stored).

unreadable-

AC

motors,

Tips on Labeling Diskettes

Each

diskette has a permanentlabel on its jacket. This labelisfor "vital

For

statistics" that will never change.
diskettes, it's a good idea to assign a unique number to each diskette. Write
such a
diskette,
Remember,

This
diskette - since thatwill change, and you
scratching

numberonthepermanentlabel. You mightalso putyour name on the

and

record the date when the diskette was first put into use.

use only a felt tip pen for marking.

"permanent"

out

labelisnot a good place to record the contentsofthe

information from this label.

example, to help keep track

don't

want to be erasing

of

or

19

MODEL II OPERATION

Keep

such directoryinformationonthe storage boxorin a separate

record

book,

using the diskette numberasa key to all record-keeping.

_'--_,

a,ad,e

cat. No.

baell

26.4906

'

..

certd\e

d

O\S\{ett

e

NO.

lr~~D@(QJ

1"10

Ibaek

n-L_~r.

ModelD:

Microcomputer

Custom Mfd.

Figure7.Labeled diskette.

20

inUSAfot.Radio

[M]@cQ]@G

certified

Diskette

ShackMA Division

of

Tandy Corporation, Ft. Worth,TX76102

IOI

6/

Add-Ons

Inside

the

Display Console are slots for eight printed circuit boards.
these slots are takenup by the boards required by the basic system ­Processor,
Memory

Video

(RAM).

Display, Floppy Disk Controller, and Random Access

Adding RAM

If

your

system has 32KofRAM,

to

unit
leaving

Radio

three

Shack.

slots still

Another

open

Systemsshippedwith64K
since a single 64K board

Decimal Address

r-~------------.....,

o

of

is

you can addanother 32K by returning the

32K boardwill be added to the card-cage,

for future enhancementofyour system.

RAM

have four slotsopenfor future additions,

used in placeoftwo 32K boards.

Hexadecimal Address

Four

X'OOOO'

of

RANDOM

32767

32768

65535

ACCESS

32KRAM

MEMORYCONFIGURATION AFTER SYSTEM IS INITIALIZED

STOPS

HERE

X '7FFF'

X '8000'

X 'FFFF'

21

MODELIIOPERATION

Adding DiskDrives

Each

drive you

bytes (roughly equivalent to 300 double-spaced typewritten pages).

Connection

of

back

Disk Expansion Unit.

the Display console, and a connector cable will be suppliedwith the

add

will increase the on-line storageofyour system by 509,184

of

additionalDisk Drivesisquite simple. Theconnectorison the

Note:

special terminator

back
connect it to the

Further
at

When

of

the

endofthis Operation Manual.

the Disk Expansion Unit

the Display Console. This terminatorisincluded with the Computer;

instructionsare provided with theExpansion Unit, andcan be added

is

not connected to the Model II, a

must be connectedto the Disk Expansion connectoron the

DISK

EXPANSION

jack.

Figure8.Disk

22

Expansion Unit with three additional Disk Drives.

ADD-ONS

ConnectingSerial Interface Equipment

The

Model II provides two serial I/O channels, for connection to equipment

like

Telephone

instructions will be provided with the serial equipment. You can add such

instructions at
description

Interface Modems, Serial Line Printers, etc. Connection

the

endofthis Operation Manual. (See Specifications for a

of

the

Serial Interface Signals.)

Figure9.Radio Shack Telephone InterfaceIIModem

for

connectionofcomputersystemtotelephone line.

Figure

PARALI,..EL

SI

"

..

:

........•.•.........

10.

Connect Telephone Interface Modem (or other serial If0 device) to serial

CHANNEL

...

······..·..·

PRINTER

"",

~",;"

...

·.I?

channel connectiononthe back panelofthe video screen.

"

....

23

MODEL II OPERATION

Parallel Interface Equipment

The

ModelIIprovides

Shack Line Printers and

Connection instructions will be provided with the equipment. Youcan add
suchinstructionsat the

of

a description

Parallel Interface Signals.)

one

parallel

other

endofthis OperationManual. (SeeSpecifications for

I/O

channel, for connection to Radio

compatible parallel-interface equipment.

24

7 / Specifications

Display Character Set

Here

are

the

32 graphics characters available on the Model II Display, along

their

with
the

useofthese codes, see the Operating System Reference Manual.

corresponding hexadecimal character codes.

For

further detail on

Note:

display characters, including alphanumerics.

D

A reverse-character (black on white)isavailable for eachofthe

08 09

OA

08

04

OC

05 06

00

liJliJlIJrnBB

10 12 13

14 15 16

OE

07

OF

17

D [

18

19

1A

18

1C 1F

25

MODELIIOPERATION

Power Supply

PowerRequirements

105 - 130 VAC, 60 Hz
240 VAC, 50 Hz (Australian)
220 VAC, 50 Hz (European)
Grounded Outlet
Maximum
Typical

Operating Temperature

current

current

32 to 110 degrees Fahrenheit

drain: 2.0 Amps

drain: 1.5 Amps

oto 43 degrees Centigrade

26

Floppy Disk Drive

SPECIFICATIONS

Total Storage Capacity

(for

User

Data

Capacity,

See

Operating System Manual)

Diskette Organization

Tracks
Sectors
Bytes

Data Transfer Rate

per

per

Diskette

per

Sector*

Track*

509,184 bytes per diskette*

77 (0-76)
26 (0-25)

(except Track 0 = 128)

256

500,000 bits per second

(except track 0 = 250,000 bps)

Required Media

Radio Shack 8" Floppy Diskettes,

Catalog Number 26-4905,

or

26-04906 (pkgof10)

Preventive Maintenance

Interval

Diskette

Lifet

8000

Power-On Hours (typical usage)

5000 Power-On Hours (heavy usage)

3.5 million passes per track

*These values are determined by the operating system software. See the

TRSDOS Reference Manual, Technical Information section.

tIn

practice, diskette lifeisusually limitedbyimproper handling. Follow

handling recommendations for maximum use.

27

MODEL II OPERATION

Serial Interface Signalsand Levels

Two channels are available, via theDB-25 connectors on the backofthe
Display Console. The signals and levels conform to the RS-232-C standard.

ChannelAis

Channel

The

DB-25 connector pin-outs and signals available are listed below.

STANDARD

R5-232-C SIGNAL

designed to allow asynchronousorsynchronous transmission.

B is designed for asynchronous transmission only.

CHANNELA

(PIN

#)

CHANNELB

STANDARD
R5-232-e SIGNAL

PIN#

28

1 2 3 4 5 6 7 8 9 10

11

12

• • • • • • • • • • • • •

13

SPECIFICATIONS

Parallel Interface Signals and Levels

The

Model II includes a parallel interface designed for connection to a line
printer
Eight

are

The

via the 34-pin connectoronthe back panelofthe DisplayConsole.

data

bits are

TTL

compatible.

connector pin-outs

output

in parallel, and four data bits are input. All levels

and

signals available are listed on the next page.

29

MODEL II OPERATION

GROUND

Common signal ground

*These signals are active-low.

30

terfromPrinter

erempty, light

, etc.)

low

2,4,6,8,10

12,14,16,18,
20,22,24,27,
31,33

IMPORTANT NOTICE

ALL RADIO SHACK COMPUTER PROGRAMS ARE LICENSED ON AN
"AS IS" BASIS WITHOUT WARRANTY.

Radio Shack shall have no liabilityorresponsibility to customer or any
other person or entity with respect toany liability, lossordamagecaused
or

alleged tobecaused directly or indirectly by computer equipment

programs sold by Radio Shack, including but not limited to anyinterrup­tionofservice, loss of business or anticipatory profits or consequential
damages resulting from the use or operation
computer programs.

NOTE: Good data processing procedure dictates that the user test the

program, run and test sample sets of data, and run the system in
parallel with the system previouslyinuse for a period of time
adequate to insure that results of operation of the computer
program are satisfactory.

of

such computer or

or

or

RADIO SHACK SOFTWARE LICENSE

A.

Radio Shack grants to CUSTOMER a
use on CUSTOMER'S computer the Radio Shack computer software
received. Title to the media on which the software is recorded (cassette
and/or

title to the software.

disk)orstored (ROM) is transferred to the CUSTOMER, but not

non~xclusive,

paiduplicense to

.

r'-"

B.

In

consideration for this license, CUSTOMER shall not reproduce

copies of Radio Shack software except to reproduce the number of copies

required for use on CUSTOMER'S computer (if the software allows a
backup copy to
notice on all copiesofsoftware reproduced in whole or in part.

C.

CUSTOMER may resell Radio Shack's system and applications soft­ware (modified or not, in whole or in part), provided CUSTOMER has
purchased one copy of the software for each one resold. The provisions
of this software License (paragraphsA,B,

to third parties purchasing such software from CUSTOMER.

be

made). and shall include Radio Shack's copyright

andC)shall alsobeapplicable

LIMITED WARRANTY

For

a periodof90
original purchaserthat the computer hardware unit
turing defects. This warranty

purchased the unit

authori~ed

unitissoldortransferredbypurchasertoa
voidifthis unit's caseorcabinetisopened,ifthe

improperorabnormal
during
franchisee,ordealer for repair,

Purchaser's sole

correctionofthe

refundatRadio Shack's election

obligationtoreplaceorrepair expendable

Any

limited

the

unit shall notbedeemed awarrantyorrepresentationbyRadio

any

Radio Shackfranchisees

the

warranty period,

statements

to,

statements regarding capacity, suitability for

purpose, nor give

days

from

the

is

from

Radio

use,orif

the

and

exclusive

defect

madebyRadio

by

adjustment,

risetoany

dateofdelivery,

only applicabletothe

Shack company-owned

and

dealers.

the

unitisalteredormodified.Ifadefect occurs

unit

mustbereturnedtoa

along

with

the

remedyinthe

and

sole

expense.

Shack

and

liabilityorobligationofRadio

Radio

Shack

shallbefree

original purchaser

This

warrantyisvoidedifthe

third

party.

This

unit

has

sales ticketorlease

eventofdefectislimitedtothe

repair,

replacement,orcomplete

Radio

items.

its

employees, including

use,orperformance

warrantstothe

from

retail

outletsorduly

warranty

been

Radio

Shack

shall

manufac-

shall

subjected

Shack

store,

agreement.

have

but

Shack

Shack.

who

be

to

no

not

of

for

EXCEPT
RADIO SHACK COMPUTER SALES AGREEMENT, THERE
OTHER
LIMITED
FITNESS
SHACK
SPECIAL, CONSEQUENTIAL
OUT

RADID

AS

SPECIFICALly PROVIDEDINTHIS

WARRANTIES,

TO,

ANY

FOR

A PARTICULAR

BE

LIABLE

OF

ANY

BREACH

SHACK

EXPRESS

IMPLIED WARRANTIES

FOR

LOSS

OF

THIS

OR

PURPOSE.INNO

OF

PROFITS

OR

OTHER

WARRANTY

MA DIVISION

WARRANTY

IMPLIED,

SIMILAR

OF

INCLUDING,

OF

MERCHANTABILITY

EVENT

OR

BENEFITS,

DAMAGES

OR

OTHERWISE.

TANDY CORPORATION

U.S.A.: FORT WORTH, TEXAS 76102

CANADA:

BARRIE, ONTARIO

L4M

SHALL

4W5

ORINTHE

ARE

NO

BUT

NOT

OR

RADIO

INDIRECT,

ARISING

7-80

AUSTRALIA

280-316

RYDALMERE,

8749288-381-SP

VICTORIA

N.S.W.

ROAD

2116

TANDY CORPORATION

BELGIUM

PARC

INDUSTRIELDENANINNE

5140

NANINNE

BILSTON

WEST

U.

K.

ROAD

WEDNESBURY

MIDLANDS

PRINTED IN U.S.A.

WS10

7JN