Commodore Plus 4 - Page 195

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XJnNEWing

Programs

183

UnNEWing

Programs

you

issue

NEW

command

and

immediately

regret

it,

you

can

try

restore

the

program.

you

one

your

programs

executed

GRAPHIC

command

during

the

current

session

and

GRAPHICCLR

command

has

been

executed

since,

use

$4000

instead

$1000

the

following

steps:

Enter

the

monitor

issuing

the

MONITOR

command.

Examine

memory

starting

$1000

typing

1000.

Scan

along

the

resulting

memory

dump

find

the

end

your

first

program

line.

you

are

lucky,

you

can

recognize

from

the

text

you

used.

not,

check

the

token

list

Appendix

The

end

the

line

marked

with

zero

byte

(but

this

may

not be

the

first

zero byte

you

encounter).

Note

the

address

the

location

following

the

zero

byte

(the

first

location

the

line).

Cursor

the

location

$1001

the

dump

and

enter

the

low

byte

the

address

there,

and

the

high

byte

$1002

(and

press

RETURN).

Continue

looking

the

memory

dump

(issue

additional

commands

needed)

until

you

find

the

end

your

program.

marked

three

zero

bytes.

Note

the

address

the

location

following

the

three

zero

bytes

(the

first

unused

location).

Display

locations

$2D

and

$2E

typing

2D.

Enter

the

low

byte

the

address

location

$2D

and

the

high

byte

$2E

(and

press

RETURN).

Exit

the

monitor

typing

Your

program

should

back.

Example:

Suppose

you

had

typed

the

following

program

(and

not

yet

saved

tape

disk).

PRINT"I

LITTLE

KITTY"

PRINT"MY

NAME

NICKY"

WHILE

A$=""

PRINT'MEOW"

GETA$

LOOP

Then

you

typed:

NEW

Here

what

would

happen

when

you

unNEWed

the

program:

MONITOR

Commodore Plus 4 - Page 195

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