Commodore MPS-803 User's Guide download pdf (Page 17)

actly

what's

happening,

you

have

to

have

a

littfe

knowledge

about

how

your

printer

works.

First,

each

printed

character

is

made

from

6

rows

of

dots.

Next.

you

can

have

up

to

80

characters

per

printed

line

(spaces

count

as

6

dots

posi

tions

just

like

letters

and

numbers).

This

means

that

there

are

a total

of

480

dots

per

line.

Now

you're

ready

for

the

3

conditions.

a.

When

the

buffer

fills

up

during

the

input

of

data.

b.

When

your

printer

"sees"

that

you

have

used

up more

than

the

480

dots

per

line

that

was

described

above,

c.

When

both

a

and

b

happen

at

the

same

time.

What

will

happen

when

these

conditions

occur?

a.

When

the

buffer

fills

during

printing,

it

prints

out

everthing

tt

has

been

stor

ing

onto your

paper.

But...

it

remembers

where

it

stopped

printing

so that

it

can

continue

from

that

point,

when

and

if

you

want

to.

Or,

it

will

print

again

when

you

want

to.

Or

it

will

print

again

when

you

fill

the

buffer

again.

b.

When

the

printer

uses

up

more

than

480

dots,

then

it

prints

out

the

line

and

then

stops

and

tells

you

that

it's

READY

for

more

information.

c.

When

both

a

and

b

occur,

your

printer

will

"dump"

only

the

first

80

charac

ters

and

print

them.

Then

it

will

move

to the

next

line.

At

this

point,

the

printer

will

do

two

things:

1)1:

will

hold

any

characters

that

have

been

left

in

the

buffer

and

add

to

them;

2)

It

will

give

you

a

READY

for

more

in

formation

statement.

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42

1.

Make

sure

that

both your

computer

and

printer

are

turned

OFF.

2.

Connect

one

end

of

the

6-pin

DIN

cable

to

the

connector

holes

located

in

the

back

of

your

printer

at

the

lower

left.

This

cable

is

"keyed"

so that

you

cannot

plug

(he

cable

in

the

wrong

way.

This

means

that

the pins

should

be

positioned

so

that

a

slight

pressure

will insert

ihe

cable

properly.

You

should

not

have

to

force

these

pins

in,

and

doing

so

could

damage

your

cable.

3.

Connect

the

other

end

of

the cable

to

your

computer

in

the

Serial

Port

Con

nector

located

in

the

back

of

your

computer

(See

Figure

12) or

your

Disk

Drive

(See

Figure

13},

Make

sure

that

you

are

"keying"

the

pins

properly

into

the

connector

with 6

holes,

4.

Now

plug

the

printer's

power

cord

into

a

standard

AC

wall

outlet.

However,

do

NOT

turn the

equipment

on

yet.

Serial

Cable

Figure

12.

Printer

to

Compuier

Hookup

II

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