Commodore MPS-803 User's Guide download pdf (Page 25)

run

HItf3

Reyerse

off

Reverse

off

Reverse

off

Reverse

off

ITS

R

c-

'--■'

&

"

s

=5

o

+■

f

4.

Selecting

Character

Mode

In

Local

CHRS(17)/CHRS(145)

Secondary

addresses

0

and

7

set

a

character

mode

in

global

{SA=0:

Graphic

Mode,

SA=7:

Business

Mode},

where

as

control

codes

CHR$(17}

[cursor

down]

and

CHRSI145}

[cursor

up]

set

a

character

mode

in

local

...

CHRS(17):

Business

Mode,

CHRSH45}:

Graphic

Mode.

Through

these

two

control

codes,

the

printer

can

produce

two

kinds

of

character

set,

both

in

graphic

mode

and

in

business

mode,

mixed

on

one

line,

that

cannot

show

on

screen.

CHRSC17}

functions

until

CHR$(145)

or

carriage

return

is

detected.

CHRS(145)

functions

until

CHRSU7]

or

carriage

return

is

detected.

EXAMPLE

1:

1

00

110

129

:l,

30

140

i

50

170

I

90

210

£20

230

240

230

2SB

270

2B&

REM

CHR$<

17>

, .

.

I.

OCflL

c>:

-Sl\

-'^SS

MODE

REM

CHR*';i45J

.

.

-

LC1CRL

GRRPHIC

MODE

CD*=CHR*

<.

I?>

:

CU*=CHR$

C

14^5^

OPEN

^,4,7

REM

PRINT

IN

BUSINESS

MOD!

PRINTS?,

iT;U$-

"4

";cnt:

"SPRCE"

PRIMT#7..CL!^:

"9

";CD*:

"HERRT"

PR

J

NT#7,

CU*

■

"

+

"

-:

CB'f

:

"01

flMOMD

"

PRINT#7,CU$J

"*

":CO*;"C!

UB"

=7=

PRIHT#7

OPEN

4,4.fi

REtn

PRINT

IN

GRflPHIC

N:.iOE

PRINT*-)

,

CD*

J

"SPfiDE

"

;

CU*;

"♦"

PRINT#4,

Cff^J

"HEflRT

"

J

CUf

■

"»"

PR

I

NT#4

,

CD*

i

"

01RMOND

"

.•

CU*.-

"

♦

"

PRjMT#4

,

CD*;

"CLUB

"

:CU*J

"■r-"

PRIKT#4<PRJNT#4

CL0SE4

;300

OPEN

310

FOR

3^:©

close;

—

1

Tf

!

t—

1

r

>

OPEN

4,4,

7

PRINTtF4,

"HELLO THERE"

not

CMD4,"HELLO

THERE"

PRINT#4

CLOSE

4

OPEN

4,4r

7

PRINT#4,

"HELLO

THERE"

CMD

4,

"HELLO

THERE"

CLOSE

4

Armed

with

these

thumbnail

descriptions

of

what

the

printer

related

commands

do,

you

can

now

proceed

to

the

next

part

of

this

chapter,

which

tells

ydu

how

to

use

these

commands

to

control

your

printer.

C.

Printing

In

The

Direct

Mode

Now

that

you

have

reviewed

the

BASIC

commands

you

will

need

to

handle

files

directed

to

your

Printer,

let's

put

them

to

use

in

some

practical

applications,

The

direct

mode

allows

you

to

communicate

with

your

printer

by

entering printing

commands

directly

into

your

computer

via

the

keyboard

and

having

them

ex

ecuted

immediately.

The

following

example

illustrates

the

DIRECT

mode

procedure

for

listing

a

short

BASIC

program.

In

the

example

below,

a

single

statement

BASIC

program

is

keyed

into

the

computer's

memory.

A

LIST

command

is

keyed

and

the

pro

gram

is

printed

on

your

video

monitor.

A

file

(#3|

is

OPENed

tD

your

Printer.

A

CMD

3

is

issued to

the

file

open

on

your

Printer

tit

is

now

listening!.

Issue

the

LIST

command

again.

This

time

the

output

will

be

sent

to

your

Printer.

Td

unlisten

the

Printer,

you

instruct

the

computer

to

print

a

null

character

to

file

#3.

Now

you

can

CLOSE

file#3,

freeing

up

that

file

number

for

some

other

use.

AH

output

will

now

appear

an

the

vidno

monitor.

You

Type:

The

screen

displays:

The

Printer

prints:

70

PRINT'TEST"

LIST

OPEN

3,

4

CMD3

i

1ST

PRINT#3

CL0SE3

10

PRINT-TEST"

LIST

10

PRINT'TEST"

OPEN

3,4

READY.

CMD3

LIST

PRINT#3

READY.

CL0SE3

READY.

READY.

lOPRINT'TEST"

READY,

19

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