Radio Shack TRS-80 PC-4 Manual de usuario

LIMITED

WARRANTY

II.

III.

TERMS

AND

CONDITIONS

SALE

AND

LICENSE

RADIO

SHACK

COMPUTER

EQUIPMENT

AND

SOFTWARE

PURCHASED

FROM

RADIO

SHACK

COMPANY-OWNED

COMPUTER

CENTER,

RETAIL

STORE

FROM

RADIO

SHACK

FRANCHISEE

DEALER

ITS

AUTHORIZED

LOCATION

CUSTOMER

OBLIGATIONS

CUSTOMER

assumes

full

responsibility

that

this

Radio

Shack

computer

hardware

purchased

(the

"Equipment"),

and

any

copies

Radio

Shack

software

included

with

the

Equipment

licensed

separately

(the

"Sottware")

meets

the

specifications,

capacity,

capabilities,

versatility,

and

other

requirements

CUSTOMER.

CUSTOMER

assumes

full

responsibility

for

the

condition

and

effectiveness

the

operating

environment

which

the

Equipment

and

Software

are

function,

and

for

its

installation

RADIO

SHACK

LIMITED

WARRANTIES

AND

CONDITIONS

SALE

For

period

ninety

(90)

calendar

days

from

the

date

the

Radio

Shack

sales

document

received

upon

purchase

the

Equipment,

RADIO

SHACK

warrants

the

original

CUSTOMER

that

the

Equipment

and

the

medium

upon

Which

the

Software

stored

free

from

manufacturing

defects

THIS

WARRANTY

ONLY

APPLICABLE

PURCHASES

RADIO

SHACK

EQUIPMENT

THE

ORIGINAL

CUSTOMER

FROM

RADIO

SHACK

COMPANY-OWNED

COMPUTER

CENTERS,

RETAIL

STORES

AND

FROM

RADIO

SHACK

FRANCHISEES

AND

DEALERS

ITS

AUTHORiZED

LOCATION.

The

warranty

void

the

Equipment's

case

cabinet

has

been

opened,

the

Equipment

Sottware

has

been

sUbjected

improper

abnormal

use.

manufacturing

defect

discovered

during

the

stated

warranty

period,

the

defective

Equipment

must

returned

Radio

Shack

Computer

Center,

Radio

Shack

retail

store,

partiCipating

Radio

Shack

franchisee

Radio

Shack

dealer

for

repair,

along

with

copy

the

sa~es

document

lease

agreement.

The

original

CUSTOMER'S

sale

and

exclusive

remedy

the

event

defect

limited

the

correction

the

defect

repair.

replacement,

refund

the

purchase

price,

RADIO

SHACK'S

election

and

sole

expense.

RADIO

SHACK

has

obligation

replace

repair

expendable

Items

RADIO

SHACK

makes

warranty

the

design,

capability,

capacity,

suitability

for

use

the

Software,

except

provided

this

paragraph.

Software

licensed

"AS

IS"

basis,

without

warranty.

The

original

CUSTOMER'S

exclusive

remedy,

the

event

Software

manufacturing

defect,

its

repair

replacement

within

thirty

(30)

calendar

days

the

date

the

Radio

Shack

sales

document

received

upon

license

the

Software.

The

defective

Software

shall

returned

RadiO

Shack

Computer

Center,

Radio

Shack

retail

store,

participating

Radio

Shack

franchisee

Radio

Shack

dealer

along

with

the

sales

document

Except

provided

herein

employee,

agent,

franchisee.

dealer

other

person

authorized

give

any

warranties

any

nature

behalf

RADIO

SHACK.

Except

provided

herein,

RADIO

SHACK

MAKES

WARRANTIES,

INCLUDING

WARRANTIES

MERCHANTABILITY

FITNESS

FOR

PARTICULAR

PURPOSE.

Some

states

not

allow

limitations

how

long

implied

warranty

lasts,

the

above

limitation(s)

may

not

apply

CUSTOMER.

LIMITATION

LIABILITY

EXCEPT

PROVIDED

HEREIN,

RADIO

SHACK

SHALL

HAVE

LIABILITY

RESPONSIBILITY

CUSTOMER

ANY

OTHER

PERSON

ENTITY

WITH

RESPECT

ANY

LIABILITY,

LOSS

DAMAGE

CAUSED

ALLEGED

CAUSED

DIRECTLY

INDIRECTLY

"EQUIPMENT"

"SOFTWARE"

SOLD,

LEASED.

LICENSED

FURNISHED

RADIO

SHACK.

INCLUDING,

BUT

NOT

LIMITED

TO.

ANY

INTERRUPTION

SERVICE,

LOSS

BUSINESS

ANTICIPATORY

PROFITS

CONSEQUENTIAL

DAMAGES

RESULTING

FROM

THE

USE

OPERATION

THE

"EQUIPMENT"

"SOFTWARE"

EVENT

SHALL

RADJO

SHACK

LIABLE

FOR

LOSS

PROFITS,

ANY

INDIRECT,

SPECIAL,

CONSEQUENTIAL

DAMAGES

ARISING

OUT

ANY

BREACH

THIS

WARRANTY

ANY

MANNER

ole

IW':!

nliT

('n~I~I~(,T~n

Ill/ITI.I

TI.I~

CIII

~IIC:J:

Ir~NC:~

IIC:~

()Q

Ap.ITlrIPAn:n

IIC.~

()~

TI.I~

"~()IIIPM~NT"

"c.nJ=TWMl:I="

NOTWITHSTANDING

THE

ABOVE

LIMITATIONS

AND

WARRANTIES.

RADlO

SHACK'S

LIABILITY

HEREUNDER

FOR

DAMAGES

INCURRED

CUSTOMER

OTHERS

SHALL

NOT

EXCEED

THE

AMOUNT

PAID

CUSTOMER

FOR

THE

PARTICULAR

"EQUIPMENT"

"SOFTWARE"

INVOLVED.

RADIO

SHACK

shall

not

liable

for

any

damages

caused

delay

delivering

furnishing

Equipment

and/or

Software.

action

ansing

out

any

claimed

breach

this

Warranty

transactions

under

this

Warranty

may

brought

than

two

(2)

years

after

the

cause

action

has

accrued

than

tour

(4)

years

after

the

date

the

Radio

Shack

sales

document

for

the

Equipment

Software,

whichever

first

occurs.

Some

states

not

allow

the

limitation

exclusion

incidental

consequential

damages,

the

above

limitation(s)

exclusion(s)

may

not

apply

CUSTOMER.

IV.

RADIO

SHACK

SOFTWARE

LICENSE

RADIO

SHACK

grants

CUSTOMER

non-exclusive,

paid-up

license

use

the

RADIO

SHACK

Software

one

computer,

subject

the

following

provisions:

Except

otherwise

provided

this

Software

License.

applicable

laws

shall

apply

the

Software.

Title

the

medium

which

the

Software

recorded

(cassette

and/or

diskette)

stored

(ROM)

transferred

CUSTOMER,

but

not

title

the

Software.

CUSTOMER

may

use

Software

one

host

compute

and

access

that

Software

through

one

terminals

the

Software

permits

this

function.

CUSTOMER

shall

not

use,

make,

manufacture.

reproduce

copies

Software

except

for

use

one

computer

and

specifically

provided

this

Software

License.

Customer

expressly

prohibited

from

disassembling

the

Software.

CUSTOMER

permitted

make

additional

copies

the

Software

onlv

for

backup

archival

purposes

additional

copies

are

required

the

operation

one

computer

with

the

Software,

but

only

the

extent

the

Software

allows

backup

copy

made.

However,

for

TRSDOS

Software,

CUSTOMER

permitted

make

limited

number

additional

copies

for

CUSTOMER'S

own

use

CUSTOMER

may

resell

distribute

unmodified

copies

the

Software

provided

CUSTOMER

has

purchased

one

copy

the

Software

for

each

one

sold

distributed.

The

provisions

this

Software

License

shall

also

applicable

third

parties

receiving

copies

the

Software

from

CUSTOMER.

All

notices

shall

retained

all

copies

the

Software.

APPLICABILITY

WARRANTY

The

terms

and

conditions

this

Warranty

are

applicable

between

RADIO

SHACK

and

CUSTOMER

either

sale

the

Equipment

andior

Software

License

CUSTOMER

transaction

whereby

RADIO

SHACK

sells

conveys

such

Equipment

third

party

for

lease

CUSTOMER.

The

limitations

liability

and

Warranty

provisions

herem

shall

inure

the

benefit

RADIO

SHACK,

the

author.

owner

and/or

licensor

the

Software

and

any

manulacturer

the

Equipment

sold

RADIO

SHACK.

VI.

STAn

LAW

RIGHTS

The

warranties

granted

herein

give

the

original

CUSTOMER

specific

legal.rights.

and

the

original

CUSTOMER

may

have

other

rights

which

vary

from

state

state.

Thank

you

very much for purchasing

the

PC-4. This handy, personal

computer

excellent for

those

who

are beginning

learn

about

computers.

With

the

PC-4, you can

enter

the

world

computers

and

start

programming using

BASIC language.

CONTENTS

Prior

Operation

..........................................·3

Use

Precautions

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

Power

Supply

and

Battery

Replacement

••.••..•.....................

Chapter 1Name and Operation of Each Section 5

1·1 Name

Each Section 5

1-2 How

Read

the

Display

.•.................................

Chapter 2Prior

Icu

lati

2-1

Contrast Adjustment

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

2-2

RAM

Expansion Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Memory Expansion

•.•.....•.•

.•.•.••.....................

2-4 Auto

Power

Off

•

"II

II II

III

Chapter 3 How

Icu

late

3-1

Calculation Priority Sequence

3-2 I

nput/Output

and Operation Number

Positions

3-3 How

Perform Fundamental Calculations

3-4 Callout

Previous Calculation Result 16

3-5 Error Messages

3-6

Key

Operation 17

Chapter 4Manual Calculation

4-1

What

Manual Calculation? 20

4-2 Operation Method for Manual Calculation 20

4-3 Manual Calculation Examples

4-3-1

How

Perform

Fundamental Calculation

................•.•.•...

4-3-2

How

Perform

Function

Calculation

4-4 Arrays III

I-

Chapter 5Program

lation

...............................27

5-1

Program Outline

............••.................

......•...

5-2 Program Fundamentals

...............................•.•...

5-2-1 Constants and Variables

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

5-2-2

Substitution

Statements

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

5·3 Program Writing and Execution

...........................••..

5-3-1 Program

Writing

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

5-3-2 Program

Execution

•...•••...••••.......................

5·4 Program Editing

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

5-5

Program

Debug

.. ..

5-6 Program Commands

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

5-6-1

5-6-2

5-6-3

5-6-4

&-6-5

5-6-6

5-6-7

5-6-8

5-6-9

5-6-10

5-6-11

5-6-12

5-6-13

5-6-14

5-6-15

5-6·16

5-6-17

Input

Command

(INPUT,

KEY)

Output

Command

(PRINT,

CSR) 45

Jump

Command (GOTO)

.•.•...•••...•.................•

Judgement Command

(IF

THEN)

..•....•...•...•••.•.•....

Loop

Command

(FOR·NEXT)

....•••.•..•..•..............

SUbroutine Command (GOSUB,

RETURN)

................•....•

Multistatement

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

Stop Command (STOP)

•.•••••...•.•.•.............•....

End Command

(END)

...•...•.•...............•.•.•••..

Execute Command

UN)

.•...•.............•.•.•....•.••

List Command

(LIST)

.........................••••.•...

Mode Designation (MODE)

•••.•.................••.•••.•.

Output

Format

(SET)

.......•...............•••.•......

Character

Functions

(LEN,

MID,

VAL)

...............••••.....

Memory

Clear

AC)

..................•.....•....•...•.

Program Clear

(CLEAR,

CLEAR

.............•.••.•...•.•.

Option

Specifications

.................................••

Cassette Magnetic Tape

(SAVE,

LOAD,

SAVE

LOAD

PUT,

GET,

VER).

Printer

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

Error

Message

List It

Program Command List I

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

•'62

Function Digit Capacity

Specifications

-2-

This

computer

delivered

you through

our

strict

testing process, high-level

electronics technology and rigid

quality

control.

In order

ensure the longevity

the

computer,

please be sure

note the

following

precautions.

•Use Precautions

•Since

the

computer

constructed using precision electronics parts, never

attempt

take

apart. Also,

not

subject the

computer

shock such

throwing

drop-

ping

and avoid extreme temperature variations.

especially careful

avoid high

temperature locations where there

also high

humidity

lot

dust. However,

the ambient temperature

too

low,

the display response

speed

may

slow

there may

display. When normal temperature conditions

are

resumed, the

computer

will

operate normally_

•Do

not

attempt

connect any equipment

the adapter socket

other

than

our

exel usive

optional

equipment.

•While the

computer

operating, a

"_"

(dash)

will

displayed.

this

time,

key

operation

will

be ineffective except

for

one section. Therefore, always be sure

press

the keys

while

confirming

the display.

•

sure

replace the batteries every 2years regardless

the

amount

use.

Worn

out

batteries may leak and

cause

malfunction.

Therefore, never

leave

old

batteries inside the computer.

•

keep the computer clean, wipe

off

surface

with

soft,

dry

cloth

one

which

has

been dampened

with

aneutral detergent.

•In

case

malfunction,

contact

the

Radio Shack store where

was

purchased.

•Prior

seeking service, please read this manual agaip and check the power supply

well

the program. Also,

operational

error

may

the

cause

apparent

malfunction.

-3-

•Power Supply

and

Battery Replacement

This

instrument

uses

two

lithium

batteries (CR2032 Cat.

No.23-162)

for

power

supply.

the

display contrast

weak even when

the

contrast

control

adjusted

for

maximum,

(refer

page 11)Ithe batteries should be replaced at the earliest

opportunity.

sure

replace the batteries every 2years.

SCrews

•

How

Replace the Batteries

(1)

After

turning

the power sWitch

off,

loosen

the

two

screws on the back and then remove the rear panel.

-:t.

°1

[Q]]

ALL

RESET button

(2) While pressing on ® ' slide

the

battery

compart-

ment

lid in the

direction

the

arrow

and remove

it.

(3) Remove

the

old

batteries.

(This

will

easier

you

tap

the

unit

lightly

with

the

battery

compartment

facing

down.)

~Oi

(4) Using a

dry

cloth,

wipe

off

the new batteries and

insert

them

with

the

EEl

(positive) side facing up.

(5) Slide

the

battery

compartment

lid closed

while

pressing

down

on the batteries.

(6) Replace the rear panel and tighten the screws.

After

turning

the

power switch on,

press

the

ALL

RESET

button

with

pointed

object.

-4-

kID

PAT

PAT OFF

£:II:TiS0wm-

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oo;G

IIAO

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GIlA

GOTO

PC-4

WRT

TRACE

IJlTAACEOFF

'NS

~<-

-EXT -MODE

mal

PlI

~P7-P.-pg-

POWER 1I

ummo

1[[1]

-ON

(g)

¢=

19>

SHFT

-.1

"-.-$-l-I-?-:-;-~

[~)

(~I

(Q]

CPCPcjJCPciJ@cpcpcp~~~1J1l

r~j

(E~]

(7!,l~'

I~T)

[~)

(SPCI

(;)

ciJ

Adapter connector

®Display

window

Shift

key

@Power switch

@Mode

key

®Display contrast control

(j)Calculation instruction keys

@Execute key

®Numerical keys and decimal

point

key

@Alphabet keys

Each

key

has

1or 2operations. The operations

can

divided

using the

Shift

Out

mode, whereby the keys

are

pressed

directly,

and the

Shift

In mode, whereby keys are

pressed

after pressing the

(SH

IFT) Key.

Example:

GOSUB

.~~

ift

In mode

OD~-Shift

Out

mode

-5-

Key operation in the Shift

Out

mode

IM@@]~[]]

C2JlRJ[[)OO[!J[Y][illO]@][E]

0[[]~[[]@](]JQ][[]w~

000[]JCYJ[[)ffi](MJ~§]OO

Key operation

the

Shift

In mode

1* $ ( ) ? : ; •

C=:lc:::::Jc:::::J~~c:Jc:Jc:lc:lc::::J

GOSUB

FOR

STEP

GOTO IF

THEN

(ANsi

c:Jc:lc:Jc:::Jc:::Jc:::Jc:J~c:J

RETURN

STOP

END

DEFM

RUN

LIST

INPUT

(SPC)

~c:JC::>c:Jc:Jc::Jc:J

c:=lc:J

JOEll

[STOP]

[2][aJ~D

~@(§Ja

C1J~@)D

~8[

EXE I

c::::J

c:=l

c:J

c:::>

.::S

c:::::J

c:Jc:J

c:::::J

::::-

c:::::J

c:J

8cSl

EXE )

In the

Shift

In mode, the alphabet keys become one-key commands and the

numerical keys become program

area

designation keys.

•In addition, using the Extension Mode

(press

~c:::J

and

"EXT"

shows on display),

while in the

Shift

In mode results in special symbols displayed

for

each

alphabet

key

that

pressed.

Lower

case

letters

will

displayed, however,

the Extension

mode

used

while in the

Shift

Out

mode.

Shift

mode

using

the extension mode

c=Jc=Jc:=Jc::Jc:::Jc:::Jc=Jc:::Jc:::JD

x+ • • • •

c:::Jc:::Jc:::Jc=Jc:::Jc:::Jc:::JDDD

• • 0 -

Shift

Out

mode

using

the extension mode

[I]800[!]lIJ0OJ~~

00(]JITJ[]][E]OJ[I)OJD

0000~~8DDD

-6-

WSHIFT

Shift Key (Symbolized by

hereafter)

this key

pressed, the

Shift

In mode

selected

displayed) and the

Shift

functions

on the keyboard

can

used. Do

not

confuse m(red key)

with

the regular

(]J

(letter

"S").

1111I1

Mode Key

This

pressed in

conjunction

with

and

(el

through

Keys

designate the

computer's

condition

angular

unit

in advance.

"EXT"

displayed. The Extension mode

designated and lower

case

letters

special symbols

can

used, depending on

whether

the

Shift

Out

modes have been previously selected.

release the Exten-

sion mode

press

again.

I!!!lIDl

UN"

displayed. Manual calculation and program execution

can

performed.

~lIJ

"WRT"

displayed. Program

write-in

and checking/editing

can

be per-

formed.

.......

"TR"

displayed. Execution trace

can

be performed.

(See

page

for

details.)

"TR"

disappears

from

display. This mode disables the execution trace

function(

"DEG"

displayed. The angular

unit

will

be designated

"degree".

1!!!lU2]

"RAD"

displayed. The angular

unit

will

be designated

"radian".

"GRA"

displayed. The angular

unit

will

designated

"gradient".

~l2J

"PRT"

displayed.

printer

connected,

printout

can

performed.

~(S)

-...

"PRT"

disappears

from

display. This mode disables the

printout

function

(~l21

[¢::'Hc:;>!

Cursor Keys

Press

move the cursor

left

right. If

pressed

once, cursor moves one character

space.

kept pressed

the

cursor continues

move

automatically.

•

All

Clear/ON

Key

•

Press

clear the entire display.

•

pressed during program execution, program execution

will

stop.

•When

error

message

displayed,

press

clear

the

error

message

display.

•When auto power

off

in operation (automatic energy saving

function,

refer

page

13). and

the

display

off,

press

turn

power back on.

INS

IOELI

Delete/Insert Key

•Deletes one character at the

position

the bl inking cursor.

•In the

Shift

In mode,

press

open

one character space

for

character insertion.

-7-

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