Radio Shack PC-2 TRS-80 Owner's Manual

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A Special Note to Our Customers

To

make the TRS-80

explain

howtouse

the

PC-2

availabletoyouasquicklyaspossible, we're providing this Owner's Manual which

PC-2.

...

will

Throughout
This manual, which should
Manual.

In the meantime, many

called

this manual, we've made referencetothe book

of

"Problem

Solving on the TRS-80 Pocket

be

available in the Summerof1982,

your

programming questions

Computer"

"TRS-80

willbea comprehensive

canbeanswered by referringtoanother Radio Shack

(Catalog number 62-2312).

Thank

Radio Shack

you,

PC-2

Programming

Guide"

PC-2

(optional/extra).

BASIC Programming

book

To Our Customers

...

Besides being oneofthe
powerful

Its

engineering,

In spite

determine

At
All

Computer.

Ataslightly
read this operation manual, then read a

If,
For
their

and versatile computersofits size available anywhere.

powerful

its simplest levelofoperation,

you

however,

your

syntax, and examplesofuse.

capabilities,aswellasits

or

personal

of

its size and power, however, the Pocket

just

how

technical a machine

will

need

to

more involved levelofoperation,

you

are alreadyanexperienced programmer and

convenience, weveincluded a Language Reference Summary in the appendix

smallest computers

use.

you

knowishow

that

Radio Shack provides,

"expandability",

you

wantitto

can

use

Radio Shack cassette programs,

to

load and run a cassette program or insert a program cartridge

you

PC-2

programming guide.

makeitthe ideal personal

Computer

be.

may

wanttowrite

are

can

familiar

the

TRS-80

computer

be

quite

simple

RAM

your

own programs.Ifyou

with

BASIC, read this operation manual.

PC-2ISone

for

business, scientific,

to

use.

Modules,orROM Modules.

which

lists

of

the most

In fact,

PC-2

you

into

are a beginner,

commands,

can

the

About

This

manual contains operating
commands
Cassette Interface).

For

a description

manual.

For

instructions

This

which

can

of

on programming the

Manual

instructions

be

used

by

the commands

the

Computer

which

Computer,

for

the

can

seeaPC-2

PC-2. The Language Reference

whenitis

be

used

not

connectedtoan

with

an

optional

programming manual.

device,

Summary

optional

see

that

includes

device (suchasPrinter/

peripheral's operation

only

those

2

Contents

Customer

Welcome

1IDescription

2/Setting Up the Pocket

3/Using the Pocket

4/Care and Maintenance 87
5/Specifications 89
Appendix

Appendix

Information.

to

the WorldofPocket Computing! 4

of

Keyboard Display Rear

Starting-Up Battery Installation External Power Supply

Using the Keyboard The

A/Language Reference Summary

B/Error

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3

the Pocket Computer 5

Panel

Computer

Computer

PC-2

As A Calculator

Codes

PC-2

BASIC

13

19

91

103

Customer Information

3

Welcome to the World of Pocket Computing!

The

• A

TRS-80

66-Key

PC-2

system consists

keyboard

for

inputting

of:

programs and data

into

the Computer.

• A 26-character Displaytoexhibit
graphics (7 X 156

•

An

expanded BASIC Language

• A CMOS microprocessor

• Read

• Random Access

• Expansion area

• A Cassette/Printer Interface

•

Only

Memory

(amountisexpandableupto

Requires a separate cassette recorder

Battery

powered

dot

pattern).

with

(ROM)

Memory

for

plug-inofoptional

for

portable

which

(RAM)

more

24K,

for

operationorDC power

data results and

that

includes graphic commands.

power

contains

for

optional/extra).

long-term storage and hard-copy

than the

the

storage

RAM,

(optional/extra)

ROM,orcombination

other

information.

mammoth

BASIC language.

of

programs and data even when the

for

cassette storage.

adaptor

4

The Display can alsobeusedtoexhibit

computersofa

RAM/ROM

output

(optional/extra).

of

few

years ago.

Computeristurned

Modules.

programs and data

off

(optional/extra).

.----,

,-.....~-_.....---,,--.~---------.--.-.---,,-

1/Description

Before using the

@-

2CD

PC-2,

'=

rL

@-

f-

of

the Pocket Computer

it's

important

l·t":1JHW

TRs-ao

.:~t&;j;-.

~OWERr

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9"

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eb

Figure 1. PC-2

5

(Front

View)

When

you're

readytoturn

the

Computer

OFF,

press this key.

Turns
rupt).

Allows
the

For

8)

CIT)~@)

In Lowercase
Normal
before

C£J

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®

(j)

C:J

?

CD Division Key.

®

IT)

(ill

~

will

Multiplication
this

the

PC-2

ON.

youtoexecute programs at line numbers

first

characterofthe

instance,

Function

commands,

Keys, the character above the key

pressing

Alphabet

W

display a

key

if

(DEF)

Keys. These keys

Option

(uppercase) Mode, any alpha-key pressed

key

keys.

Number

Allows

question

Key.

will

produce a colon (

If

CQJ

or

statements

Mode

which

keys.

mark

Allows

pressed

line.

is

has

you

while

Other

pressed, the

are

you

desire. When (SHIFT)

(SMALL),

a character aboveitand

to

divide

(n.

you

to

:).

you

are running a program,

which

keys

permanently

command

reserved

willbeused.

any alpha-key pressed

numeric

multiply

for

values.

numeric

actascommand keys

INPUT

your

after

the

execution

have had certain keys assignedtothem

willbedisplayed.

use.

You

can

assigntothem

is

pressed

after

this

key

character aboveitwillbedisplayed.

Pressing (SHIFT) before pressing this key

values. Pressing (SHIFT) before pressing

before

this

will

be lowercase.

key

will

"break"

after

.@f)

anyofthe

will

be

(inter-

as

is

pressed.

any values,

Function

uppercase. In

Press

this

key

6

@G

@CB

@

(Cl)

,

CA

Subtraction
key

will

Key.

produce a comma

Allows

you

(,).

to

subtract

numeric

values. Pressing (SHIFT)

before

pressing

this

,

Addition
a semicolon (;).

Clear Key. Pressing this
pressing
puter.

Key.

(Cl)

Allows

will

activate the

youtoadd

key

will

CA

numeric

clear the Display and "release" errors. Pressing (SHIFT) before

(reset)

values. Pressing (SHIFT) before pressing this key produce

function.

This

will

clear the

display

and reset the Com-

@

TCD

@

CD

@

CD

@

(SMl)

@GJ

< >

..

7l:

Pressing
will

Parentheses Keys. Pressing (SHIFT) before pressing these keys
Than

Display previous program line. Pressing (SHIFT) before pressing this key

root

Display
and

Lowercase

normal

Reserve Mode Change. Since each

three modes - 1/II/III - pressing

this

key

will

specify

specify

symbols

(v)

allow

RESERVE

.

sign and

next

program line. Pressing (SHIFT) before pressing this key

youtouse

Option

(uppercase alpha-) character display

operation

allow

a stored valueofPIinyour

Key.

either

mode.

youtocompute

Press

once and lowercase (small) letters

the

RUNorPROgram

the square

willbeused.

of

the six

this

key

will

7

Operation

rootofa

computations.

Function

move

Keys

the

Mode. Pressing (SHIFT) (MODE)

will

produce

numeric

can

Computertothe

value.

will

will

be

be

assigned values in each

the

Greater Than/Less

will

produce a square

produceaPI

used.

Press

next

Reserve Mode.

(

11"

) sign

again and

of

Recall Key. Pressing
(l/II/III).

Pressing

this

this

key

one

will display

key again will recall

the

function

the

contentsofthe

key

menu

for

original display.

the

current

reserve

mode

DEL

@G]

INS

@CB

@

Printer/Cassette

Spacerbar

before
numeric

When
This

PC-2 will

Backspace Key. This key allows
typed
Cursoris"on

Forward
viously
directly

Interface. See

bottomoftheInterfacesoyou

Key. Pressing

pressing

expressiontoa

you

press

key

is similartothe
accept

characters.

top

Key. Pressing

typed

Interface

characters.

before

this

this

key

and

power.

this

key,

whatever

Carriage

alphanumeric

Pressing (SHIFT)

of."

this

Pressing (SHIFT)

the

character

Connector

Printer/Cassette

the

input

key

the

Cover. Remove

won't

key will

Exponential

you

allows

Cursoris"on

Interface

you

Return

from

to

before

lose it!)

advance

previously

the

you

before

owner's

the

symbol

key

onatypewriter.

keyboard.

move

the

pressing

to

move

pressing

top

of."

the

Covertoattach

manual

Cursor,

will be

typed

Cursortothe

this

the

leaving a

produced

will

key will

Cursortothe

this

key will allow I

for

details.

"enter"

You

left

DELete

the

blank

and

allow

the

Computer's

must

press

without

whatever

right

without

NSertionofcharacters

PC-2tothe

(And

attach

space. Press (SHIFT)

youtoraise a

memory.

(ENTER)

erasing previously

before

character

erasing pre-

Printer/Cassette

the

Covertothe

the

the

8

CD

{-

BUSY

0

{- {-

SHIFT

(2)

SMALL

8)

{- {- {- {-

DEG

®

RUN

®

DEF

(j)

®

{-

•

]

CD

o

G)

BUSY

SH

1FT

SMALL

Angular

Program
executioniscomplete, the

@

Sh

ift

(SML)

Lowercase
Mode (the
cator

Measurement

metric
"radians."
in gradients,

todootherwise.

Execution

or

automatically

Key Indicator.

or

CQID

) and the Indi cator

Option
Computer

on;

press againtoturn

Indicator.

functions:

(To

compute

type

Indicator.

after

ThisIndicatorison whenever (SHIFT)

Indicator.

can

DEG

GRAD

Figure 2.

Indicator

seven

This

display

off.

This

Indicator

for

"degrees."

in radians,

(ENTER)

Sample

This

minutes) when the BUSY

wiIIgo

Indicatorison whenever the

either

type

). The

PC-2 Display

Indicatorison

goes

off.

off.

upper-orlowercase letters).

will

display the

(To

compute

RADIAN

Computer

a

during

The PC-2

current

in degrees,

(ENTER)

will

program

will

not

Indicatorison.

has

been pressed.

unitofangle

);

GRAD

use

a measurement mode

execution.

turn

Computerisin Lowercase

Press

type

DEGREE

for

off

(manually

Press

(SML)

to

for

the

inputoftrigono-

(ENTER)

"gradients."

When program

by

pressing

any key (except

Option

turn

the Indi-

);

RAD

for

(To

compute

until

you

tell

it

® Operation Mode

in RUN Modetoexecute

a calculator), This

PRO Mode

other.

values, commands, or statementstothe

Indicator.

to

enter programs

Press

(SHIFT)

This

Indicator

Indicator

(MODE)

("run")

will

into

and the

will

display RUN when

programs or
display PRO when
the Computer's

Indicator

Function

perform

will

you

are

in the RUN Mode.

manual calculations

you

are

in PROgram Mode.

memory.

display RESERVE. In this mode,

Keysaswellasset up

Press

(MODE)

(use

togofrom

Function

You

must

the Computer like

You

mustbein

one modetothe

you

may

assign

Key menus.

be

® DEF Definable Mode Indicator. This

@IT)

All

followed

six

Function

(jJ

® •

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labeled program. In any mode, pressing
allows

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modes,
modes

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When this

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easy

useofkeywords.

press

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Indicator.

themorconnect the Computertoan

foratotalof18

As longasthis

IndicatorisOF F, the Computer's batteries are

Indicator

Indicator

different

IndicatorisON, the

lights up when

by

a program label key

(ill)

tells

Keys (

val

ues.

external power supply.

10

you

press

(see

Table 2)

followedbya command

you

which

em

Reserve

~

CE§)

Computer

Mode the

)

canbedefined in eachofthe three

has

too

"low"

@ill

. When the

will

allow

instruction

sufficient
to

insure correct operation.

key

PC-2isin.

powertooperate.

PC-2isin the

youtorun a

(see

Table 1)

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change

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1(\

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~

0

t=:::t=J

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0

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guide

for

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(ON) .
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you'll

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specific details.

the

lose any programs in

Button.

button

Slot.

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and

Figure3.PC-2

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the

RAM

or

PC-2 ever "hangs up, ,

key

down

for

memory).

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ROM Modules

useaball-point

about

15 seconds.

Panel)

into

0

CD

this

slot.

pentopress

Be

aware, however,

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your

RAM/ROM

this

button

that

memory

0

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while

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user's

pressing

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o

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nottolose

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the

screw

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batteries

attachedtothe

power

which

supply

supply

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adaptor

powertothe

when

removed.

(optional/extra),

PC-2.

plugitin

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careful

here.

12

2/Setti

Start-Up

To

turn

the

The

Computer

•

If

the

ng

Up the Pocket

PC-2

on,

should

Computer

simply

was last usedtocompute

respond

press

with

the

the

(ON) key.

Ready

Co

mputer

prompt

degrees, radians,orgradients.

( > )

and

indicators

that

tell

you:

• Which

• Whichofthe

•

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start-up,

For

instance:

Operation

the

Mode

three

Reserve Modes 0, II,orIII) has been

there's

PC-2 uses all

the

Computerisin

enough

mode

SHIFT

....

(PROgram,

battery

settings

powertouse

that

were

SMALL

Figure 4. Sample Display On

DEG

RUN,orRESERVE

selected.

the

Computer.

being used

RUN

when

the

Start-Up

Mode).

Computer

was

turned

off.

When

the

Computeristurned

on,

there

are

four

different

power-up

messages

which

canbedisplayed:

This

message

•

Turning

•

Battery

• Pressing

To

clear

1. Press @ .

2. Be

3.

4. Press (SHIFT)

5.

This

sure

Type:

Type:

procedure

can

the

replacement.

ALL

the

Display

you

NEW0

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appearonpower-up

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RESET.

areinPROgram

(ENTER)

(M~)

(ENTER)

will

clear

and

begin

.

,

The

.

the

on

for

computing:

PC-2 will

PC-2's Main

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after:

the

first

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::i...

:

i···

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time.

not,

press

thenbein

and

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t;

DEG

i<:

~

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until

memory

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PROisdisplayed.

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areas.

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DEF

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this

message

operating

appears,itmeans

properly.

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@)

that

one

of

to

clear the display and

the peripheral devices (suchasa Printer/Cassette Interface)isnot

continue

computing.

".

",

The Display

Thisisa sample display. Whenever

key

has

a
previous display

Note:

I

ndicator

If

you

display

Press

CTI

next

program step

will

not

been pressed

will

If

the

ARUN

ON.

press (ON)
the

line

numberatwhich

and the

look

like

this on

for

seven

appear.

statementisusedasthe

while

a programisrunning,itservesasa

the

portion

will

of

execute.

the program line

Type

normal

the

minutes),

"break"

CaNT

DEG

power-on and when

DEG

PC-2

turns

itself

press (QR)

first

command

took

place.

that

had

(ENTER)

to

continue

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off

automatically

to

in a program,

BREAK

just

15

optional

PRO

turn

the

executed

program

II

devicesormemory

m

(when

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the

key.

will

execution

the

back on. When

PC-2 can start

The

program

re-appear.

after

PC-2

. ]

modules are connected.

. ]

has

not

been busy and

youdoso,

up

with

the

will

stop

execution

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CIJ again, and

a break.

the

BUSY

and

the

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you're

If

the

BUSY

readytoturn

indicatorison,

the

press

OFF

PC-2

OFF,

BREAK

press

before

the

pressing

(Qffi

key.

(Qff)

The

Display will

.

then

clear (be erased).

When itisturned

when

the

Computer

the

program

(The PC-2

you

clear

Note:

willbein

forgets

memory!).

You

cannot

off,

was

only

turn

Battery Installation

We

suggest

To

install

1.

If

2. Place

you

use

the

batteries:

you

wishtopreserve

the

PC-2 upside

Radio

the

PC-2

turned

memory.

when

the

Computer

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the

downona

remembers

on.

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you

remove

off

Type

AA

contentsofmemory,

soft,

programs,

you

the

batteries

when

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non-abrasive

turn

the

batteries

mode

the

without

BUSY

connect

surface

16

settings,

Computer

first

lightison.

(Radio

the

PC-2toan

(such as a

Definable Keys,

back

ON,

those

settings

connectinganexternal

Shack

Catalog

optional

foam

Number

rubber

external

pad).

etc.

power

23-552).

that

were

will

be

supplyorwhen

power

supply.

being used

displayed

and

3. Use a

4.

Slide

5.

Insert

Computer)

battery.)

coin

the

four

to

Cover

Type

with

carefully

sideways

AA

the

loosen

until itisfree

alkaline

actual

shape

the

small

batteries

of

screw

from

the

the

into

battery.

which

Computer.

place,

holds

the

matching

(Place

the

Battery

the

battery

"spring"

Coverinplace. (Do

outline

against

the

(in

bottom

the

not

lose

battery

("-")

the

screw!)

slotofthe

endofthe

6. Replace

If

you
Battery
RESET
Ready

the

used

Indicator
(on

prompt

Cover

an

external

the

backofthe

( > )will

does

and

power

not

appear.

External Power Supply

The

PC-2

can

be

used

with

PRINTER/CASSETTE

The

PC-2 will

the

Computer

The

Battery

itisnot

ON,

not

(on

Indicator
the

INTERFACE

"recognize"

the

right

light

power

supply

tighten

the

screw.

supply,

come

on,

Computer).

external

power

(26-3605).

that

an

sideofthe

should

be ON

couldbedefective.

disconnectitfrom

check

PC-2)

The

supply

external

and

to

make

message NEWO?: CHECK will be

sources

power

into

a wall

wheneveranexternal

Disconnect

the

PC-2

before

sure

the

batteries

(optional/extra)

sourceisconnected

outlet.

power

the

power

17

are

turning

installed

the

properly.)

displayed.

suchasthe

toituntil

one

the

sourceisconnected

supply

and

see if

Computer

Press

provided

Then

(~)

with

ON.

press

and

the

adaptorisplugged

to

the

Computer.

the

Indicator

comes

(If

the

ALL

the

PC-2

into

If

ON

when

the

still does

Note

thatanexternal

PC-2ispowered

not

come

on,

power

by batteries.

check

supply

with

your

will

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the

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local Radio

not

recharge

does

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store.

the

batteries. When

not

come

on,

the

replace

batteries

the

batteries.Ifthe

are low, replace

Indicator

them.

18

3/Using the Pocket Computer

You

can

start using

your

PC-2assoonasit's

been

turned on.

Since many symbols on
use

the Computer keyboard.

PC-2

can

The
the

PC-2

PC-2asa calculator.

We'll also discuss features
an

experienced programmer,

time

you

If

thisisyour

ontoa

PC-2

alsobeusedasa powerful calculator when in the

has

all

the

featuresofa

finish this section.

introductiontocomputers,

programming guide and

the

of

PC-2

PC-2
you'll

keyboard

memory

BASIC Language which

be

write

are

not

commontoother computers, this section

calculator plus much more! This section

writing

you'll

your

your

own programs (including graphics) on the Computer

be

familiar

own

programs.

19

"immediate"

are

not

enough

(RUN)

commontoother

with

the

PC-2

after

will

explain

Mode. When usingitthis way,

will

describe

formsofBASIC.

reading this sectiontogo

howtouse

how

If

by

to

the

you're

the

Using

The

PC-2

the Keyboard

keyboard allows

youtoenter all standard

text

charactersaswellasmany special key

functions.

(SHIFT) and

Normal

The

PC-2

keyboard

To

enter the Lowercase Mode,

~

vs.

Lowercase

Option

keyboardisusually in

willbeuppercase.

Display and all letters entered

To

display uppercase letters

(and

only

the

following

To

return

letters

to

Normal

next)

character

will

continuetobe

Mode, press

willbeuppercase.

If

you

needtodisplay a single lowercase

letter

specified (and

Note:

When using lowercase letters,

only

that

etc.) mustbeuppercase. The

Normal

press

~

(uppercase

.

willbelowercase.

while

in Lowercase Mode,

will

be

displayed

lowercase.

~

again. The

letter

letter)

PC-2

willbedisplayedasa lowercase character.

it's

importanttonote

does

not

recognize lowercase statementsorcommands.

At

only)

this

time,

as

an

SMALL

while

in Normal Mode, press (SHIFT) and then a

Mode. In this mode, all characters

the Lowercase

press

(SHIFT) before pressing a character key. The

Indicator

uppercase letter. Unless

light

will

that

disappear

program

instructions

from

20

typed

(SMALL)

you

press

will

lightupon the

(SHIFT) again, all

the Display and all letters

letter

key. The

(commands suchasRUN,

on the

next

(~)

Clearing the Display

The

PC-2's Display

si

mplybypressing

the

may

and

Resetting the Computer

be

clearedatany

(CL)

clear

key.

time

(except

during

program

execution

when

the

BUSY

Indicatorison)

Pressing (SHIFT)
does

not

mean

that

it

meansisthat

To

clear all variables (set

the

gotoPROgram

Don't

Computer.

a
Press (CL)

(MODE)

Operation Modes

The

•

• RUN

forget

ball-point

PC-2 uses

PROgram

Modeinwhich

that

You

pentopress

or

(ON)

three

Modeinwhich

(~)

(e.g., CAl will

the

PC-2 will erase all

Display

and

them

Mode

and

type

you

can also reset

may

needtodo

ALL

to

returntothe

modesofoperation

you

you

can

reset

the

memory

equaltozero),

NEW

(ENTER)

the

thisifthe

RESET

(and (ON) )

Ready

prompt

.

write

and

edit

run

(execute)

the

Computer.

programs

"stack"

.

and

will be cleared.

type

CLEAR

PC-2 by pressing

PC-2 ever

BASIC

BASIC

"hangs

for

about15seconds.

( >

).

programs

programsoruse

')1

Resetting

set

all variables

(ENTER)

the

up"

.

.

ALL

and

the

Computer

equaltozeroaswith

If

you

wanttoerase all

RESET

doesn't

The

the

PC-2 as a

Button

recognize

message: N

powerful

by

EWO?:

pressing

most

CID

TRS-80's.

programsinmemory

on

the

rear panel

any

keyboard

CH

ECK will

calculator.

,however,

of

input.

appear.

All

the

Use

• RESERVE Mode where

you

assign

valuestoFunction

Keys and set up

Function

Key menus.

The Operation Mode

Press

the

Press

(MODE)

(SHIFT)

keytoenter either PROgramorRUN Mode (the

(MODE)

PROgram Mode
Whenever

the

Operation mode I

BASIC programs.

The PROgram Mode

65279,

and

65279:

For instance,

You

cannot

followed

END

in advance.)

type50PRINT

use

the
in PROgram Mode.
is

in PRO Mode.Itwill

1J+2".

In

the

same

sense,ifyou

thatisnot

Display when

preceded

you

Indicator

to

enter RESERVE Mode.

is

used

by a program

(on the Display)

ndicator

only

for

writing

instruction.

You

must always

X

(ENTER)

will

tell

displays PRO, the

programs.

(If

you're

press

(ENTER)

.

After

you

press

you

PC-2asa calculator (sometimes referred

For

example,

interpret

the

you

cannot

first

"2"

instruct

as

program line number 2 and create a program line consisting

attempttoenteranalphabet character

byanumber

press

(ENTER)

(e.g., a line number), the Computer

. This

is

just the PC-2's wayoftelling

which mode the

Indicator

Computerisin.

will

change).

PC-2isin the PROgrammable Mode and

All

program lines must begin

typing

to

(ENTER)

a long program,wesuggest

enter

the

program line

,the

Computer

toas"immediate

the

Computer

that

to

compute

has

not

will

return a zero (0) on the

you

will

been assigned a

that

you

withanumber

into

the Computer's memory.

display: 50:

mode calculations") whileitis

the

answerto2 + 2 when

enteredaninvalid

22

you

type

PRINT

numeric

right

you

can

between 1

in the line

value and

sideofthe

entry

write

X

it

of

into

its

memory.

RUN Mode

Once programs have been entered

To

enter

the

RUN

Mode, press

puter

willgoto

There are, however, a

For

instance,

example.

When F1:
RUN

_.

Press

Hint:
your
as

Another
Definable Keys
by

The PC-2

Assign

havingtopress

pressing

waytoRUN

the

key label.

the

first

you

might

(See

CID

is

displayed,

(ENTER)

RUN@to

(ENTER)

can

.

for

more details.) Then, when

You

alsobeusedasa

program line

few

waystobegin a program

wanttoassign

~

ern

Function

type

RUN

and program

CID

. When

(ENTER)

a programisto

will

. When

not

havetotype

calculator

into

the

Computer's

(MODE)

until

numberinmemory

the

RUN commandtoa

Keys

for

(ENTER)

execution

you

it

follows

assign

(make

. Then

RUN

memory,

RUN

appears on the Display. Then

and execute

without

details.)

gotoRUN

will

begin

press

CID

RUNorany

Definable Key labelstocertain line numbers

you

wanttoRUN

(ENTER)

that

a super

with

in

.

typing

RUN

you

it.

RUN.

Function

Mode and press

the

first

program line in

Mode the program

other

command,

a specific program,

calculator!)

can

run (execute)

Key.

whenitis

type:

Try

CID

CID

. The

memory.

will

the @ sign serves the same purpose

simply

in the

theminthe

RUN

(ENTER). The Com-

, Reserve Mode I

Computer

automatically

within

RUN

a program.

press

Mode.

(ffi)

RUN

will

run

followed

Mode.

as

display

without

(See

an

For

details on using

the

PC-2asa calculator,

see

Using the PC-2 As A Calculator later in

this

manual.

RESERVE

To

enter the

In

this

CEID

Reserve Mode

For instance,

value in Mode

To

useaFunction

Function

Any

value, statement,orcommand
most convenient
frequently.
them

The

value assigned

However,

of

charactersisreached,

the

Ready

Mode

RESERVE

Operation Mode,

) in any

of

the three Reserve Modes (I/II/III)

to

another, press CIJ and the Display

CID

III.

Key.

to

You

might

over and over,

the

total

prompt.

can

Key

assign

also

just

toaFunction

numberofcharacters

Mode, press (SHIFT)

you

can

assign

be

assigned one value in Reserve ModeI,a

which

put

Error

has

common

assign

the

13

twoorthree values,

which

long mathematical

Computer

Key can

will

(MODE)

commands, statements,orvaluestoanyofthe

the

command statements (such

in the appropriate Reserve Mode and press the proper

for

result.

.

RESERVE

foratotal

will

change

press

PC-2

recognizes

functionsorcommand linestoa key. Then, insteadoftyping

be

any

number

all18Function

Press

(ENTER)

24

will

appear on the Display.

of

18

fromItoIIto

CIJ

to

can

be

as

of

characters in length

Keys

cannot

. The value

Function

different

different

change modes, then press the appropriate

assignedtoa

RUN

exceed 77. When the

willbeassigned and the PC-2

Function

III.

value in Mode

Function

or

TIME)

Keys.

which

up

toamaximum

Keys (

To

II,

and

Key.

you

might

maximum

CID

go

from

still

another

You'll

use

Function

number

will

return

find

Key.

of

~

one

it

very

77.
to

If a

function

displayed.

To

makeaFunction

1.

Be

sure

toIIto

key

has

not

Key

you'reinthe

III).

Use I

for

been

assigned a

assignment:

appropriate

this

example.

value

Function

and

you

Key Mode

press it,

(1/11/111)

the

symbol

(press CD

above

and

the

the

key

(!,

Indicator

#,

$,

etc.) will

will go

from

be

I

2. Press a

3.

The

Display will

4.

Type

5. Press

Function

the

characters

(ENTER)

[

;::1'

:

to

Key (

show:

J.::

enter

(II)

~

CfID

you

wanttoassigntothe

the

value.

DEG

).

Use

(II)

for

this

example.

RESERVE

• 1

__

key.

. J

For

example,

serve the

you

might

same

functionaspressing

want

to

assign

(ENTER)

the

TIME

) and the

statement

Computer

to

will

ill)

display:

.

Type

TIME

@ (Remember

that@will

F1=

Press

(ENTER)

Whenever the
line

willbedisplayedorexecuted

In

this

Since

it's

what

values are

One

wayisto

what's

A menu
abbreviationsofone

For

instance, a

.

Computerisin PROgramorRUN

instance, the PC-2

easytoforget

currently

create a

been assigned)toFunction

cannot

be

more than25charactersorspaces

sortoranother

typical

l

.Ir

I

tliE

would

whatisstored in a

assigned.

"menu"

menu

might

::;.1

immediately.

display the

which

Keys in a specific Reserve Mode.

when creating menus.

be:

DEG

RESERVE

.....

Mode (and Reserve Mode

current

Function

displays - allatonce - whatever

time

and dateassoonasyou

Key, the

in length. Consequently,

26

Computer

I),

and

you

press

C£D

,the

pressed

has

a coupleofwaysofreminding

has

been assigned (or abbreviations

you'll

C£D

.

findita good ideatouse

command

you

of