Radio Shack DMP-200 Operation Manual

SERVICE

POLICY

Radio

Shack's

nationwide

network

of

service

facilities

provides

quick,

convenient,

and

reliable

repair

services

for

all

of its

computer

products, in

most

instances.

Warranty

service

will

be

performed

in

accordance

with

Radio

Shack's

Limited

Warranty.

Non-warranty

service

will

be

provided

at reasonable

parts

and

labor

costs.

Because

of

the

sensitivity

of

computer

equipment,

and

the problems

which

can

result

from

improper

servicing,

the

following

limitations

also

apply

to

the

services

offered

by Radio

Shack:

1. If

any

of

the

warranty

seals

on

any

Radio

Shack

computer

products

are

broken,

Radio

Shack

reserves

the

right

to

refuse

to

service

the

equipment

or

to void

any

remaining

warranty

on the

equipment.

2.

If any

Radio

Shack

computer

equipment

has

been

modified

so that

it is

not

within

manufacturer's

specifications,

including,

but

not limited

to, the

installation

of

any

non-Radio

Shack

parts,

components,

or

replacement

boards,

then

Radio

Shack

reserves

the

right

to refuse

to service

the

equipment,

void

any

remaining

warranty,

remove

and

replace any

non-Radio

Shack

part

found

in

the

equipment,

and

perform

whatever

modifications

are

necessary

to

return

the

equipment

to original

factory

manufacturer's

specifications.

3. The

cost for the

labor

and

parts

required

to return

the Radio

Shack

computer

equipment

to

original

manufacturer's

specifications

will

be charged

to the

customer

in

addition

to

the

norma!

repair

charge.

TERMS

AND

CONDITIONS OF SALE

AND LICENSE

OF

RADIO SHACK

COMPUTER EQUIPMENT AND

SOFTWARE

PURCHASED

FROM A

RADIO SHACK

COMPANY-OWNED

COMPUTER CENTER. RETAIL STORE

OR

FROM A

RADIO

SHACK

FRANCHISEE

OR DEALER

AT

ITS

AUTHORIZED

LOCATION

Jjj

CUSTOMER

OBLIGATIONS

LIMITED

WARRANTY

IfeVs?:

US]

Ir

A

CUSTOMER

assumes

full responsibility

that this Radio Shack computer

harcware purchased

(the

"Equipment"), and any copies of

Radio

Shack

software included with

the Equipment

or

licensed

separately (the •Software") meets the specifications, capacity,

capabilities,

versatility,

and other

requirements

of CUSTOMER

8 CUSTOMER

assumes

full responsibility

for the condition and effectiveness of

the

operating environment in

which

the

Equipment

and

Software

are

to

function,

and

for its installation

II.

RADIO SHACK LIMITED WARRANTIES AND CONDITIONS OF SALE

A. For

a period

of

ninety

(90)

calendar

days

from

the

date

of

the

Radio

Shack sales

document received upon

purcnase

of

the

Equipment. RADIO

SHACK

warrants

to

the

original

CUSTOMER that the Equipment and

the medium upon which the Software

is

stored

is free

from manufacturing

defects. THIS WARRANTY

IS ONLY APPLICABLE TO PURCHASES

OF RADIO SHACK

EQUIPMENT BY

THE

ORIGINAL CUSTOMER

FROM

RADIO

SHACK

COMPANY-OWNED

COMPUTER CENTERS.

RETAIL

STORES

AND FROM

RADIO SHACK

FRANCHISEES

AND

DEALERS

AT

ITS

AUTHORIZED

LOCATION. The warranty

is

void if

the

Equipment's

case

or

cabinet has been opened, or

if

the

Equipment or Software

fras

fjserr

subjected

to

improper

or abnormal

use.

If

a

manufacturing

defect

is discovered

during

the

stated

warranty period, the

defective

Equipment

must

be

returned

to a Radio Shack Computer

Center,

a

Radio Shack retail store,

participating

Radio Shack

francnisee

or

Radio Shack

dealer

for

repair,

along

with

a

copy of

the sales document or iease

agreement.

The

original

CUSTOMER'S sole

and exclusive

remedy

in

the event

of

a defect is

limited

to

the

correction of the

defect

by

repair, replacement, or refund of

the purchase

price, at

RADIO

SHACK'S election

and

scie

expense.

RADIO

SHACK has

no

obligation

to

replace or

repair

expendable

items.

B. RADIO SHACK

makes

no warranty

as to

the

design,

capability,

capacity,

or

suitability

for

use

of the Software, except as

provided

in

this

paragraph

Software is licensed

on

an "AS

IS"

basis,

without warranty.

The original

CUSTOMER'S

exclusive remedy,

in

the

event

of

a

Software manufacturing

defect, is

its repair

or

replacement

within thirty

(30)

calendar days

of

the date of the

Radio Shack sales

document

received upon license

of the

Software.

The

defective Software

shall

be

returned

to

a Radio

Shack Computer Center,

a

Radio Shack

retail store,

participating Radio

Shack franchisee

or

Radio Shack

dealer

along with the saies document.

C. Except as provided herein

no employee, agent, franchisee, dealer or

other

person is authorized to

give any

warranties of any nature on

behalf

of

RADIO

SHACK

D.

Except

as

provided herein.

RADIO SHACK MAKES

NO

WARRANTIES. INCLUDING

WARRANTIES

OF

MERCHANTABILITY OR FITNESS

FOR

A

PARTICULAR

PURPOSE.

E.

Some

states

do

not allow limitations

on

how long

an

implied warranty

lasts,

so

the

above

limitations) may

not appiy

to

CUSTOMER.

III.

LIMITATION

OF LIABILITY

A

EXCEPT AS

PROVIDED

HEREIN. RADIO SHACK SHALL HAVE

NO

LIABILITY

OR

RESPONSIBILITY TO

CUSTOMER

OR

ANY OTHER

PERSON

OR

ENTITY WITH

RESPECT TO

ANY

LIABILITY.

LOSS

OR OAMAGE CAUSED OR

ALLEGED TO BE

CAUSED

DIRECTLY OR

INDIRECTLY

SY

"EQUIPMENT"

OR "SOFTWARE"

SOLD. LEASED. LICENSED

OR

FURNISHED BY

RADIO

SHACK,

INCLUDING. BUT

NOT LIMITED

TO.

ANY

INTERRUPTION

OF SERVICE.

LOSS OF BUSINESS

OR

ANTICIPATORY PROFITS

OR

CONSEQUENTIAL

DAMAGES

RESULTING

FROM THE

USE

OR

OPERATION

OF THE 'EQUIPMENT""

OR

"SOFTWARE" IN

NO

EVENT

SHALL

RADIO SHACK BE

LIABLE

FOR

LOSS

OF

PROFITS.

OR

ANY

INDIRECT.

SPECIAL.

OR CONSEQUENTIAL DAMAGES

ARISING

OUT OF

ANY

BREACH

OF

THIS

WARRANTY

OR

IN

ANY MANNER

ARISING

OUT

OF OR CONNECTED

WITH

THE

SALE. LEASE.

LICENSE.

USE OR

ANTICIPATED

USE

OF

THE

"EQUIPMENT" OR

"SOFTWARE".

NOTWITHSTANDING

THE ABOVE LIMITATIONS AND WARRANTIES, RADIO SHACK'S LIABILITY

HEREUNDER

FOR

DAMAGES

INCURRED BY

CUSTOMER

OR

OTHERS

SHALL

NOT

EXCEED

THE AMOUNT PAID BY CUSTOMER FOR

THE

PARTICULAR

"EQUIPMENT"

OR

"SOFTWARE"

INVOLVED

B.

RADIO

SHACK shall

not

be

liable for

any damages

caused by

delay

in delivering

or

furnishing Equipment

and-or

Software.

C.

No action

arising

out

of any claimed breach of

this

Warranty

or

transactions under

this

Warranty may

be

brought more than

two

(2)

years

after the

cause

of action

has accrued

or more

than

four

(4)

years after the

date

of the Radio

Shack

sales

document

for the Equipment

or

Software,

whichever first

occurs.

0.

Some

states

do

not allow the limitation

or exclusion of

incidental

or consequential

damages,

so

the above

limitations) or exciusion(s)

may

not

apply

to CUSTOMER.

IV.

RADIO

SHACK

SOFTWARE

LICENSE

RADIO

SHACK

grants

to

CUSTOMER

a

non-exclusive, paid-up license to use

the RADIO SHACK Software on one

computer, subject to the

following

provisions:

A.

Except

as otherwise

provided in this Software License, applicable copyright

laws

shall

apply

to

the

Software.

B. Title

to the

medium

on

which the

Software is recorded (cassette and/or

diskette)

or

stored (ROM) is

transferred

to

CUSTOMER,

but

not

title to

the

Software.

C. CUSTOMER

may

use Software

on one host

computer and access

that

Software through one

or

more

terminals

if

the

Software

permits

this

function.

0.

CUSTOMER shall

not use. make,

manufacture,

or

reprpduce copies of

Software except for

use

on

one

computer

and as

is

specifically

provided in

this

Software

License. Customer is expressly

prohibited from

disassembling

the

Software.

E.

CUSTOMER

is

permitted

to make

additional copies of

the Software

only

for

backup or archival

purposes

or

if additional copies

are

required

in

the

operation

of one computer

with

the

Software, but

only

to

the extent

the Software allows

a

backup

copy

to

be made.

However,

for

TRSDOS

Software.

CUSTOMER is permitted

to

make

a

limited number

of

additional copies for

CUSTOMER'S

own use.

*

F.

CUSTOMER

may

resell

or

distribute

unmodified

copies

of the

Software provided CUSTOMER has

purchased

one copy

of

the

Software

for each

one sold

or distributed.

The

provisions

of

this

Software License

shall

also

be

applicable

to

third parties

receiving

copies of

the

Software

from

CUSTOMER.

All

copyright notices

shall

be retained

on

all copies

of

the

Software.

APPLICABILITY

OF

WARRANTY

A.

The terms

and

conditions

of this Warranty are

applicable

as

between RADIO SHACK and CUSTOMER to

either

a

sale

of

the

Equipment

and/or

Software

License

to CUSTOMER

or to

a

transaction

whereby RADIO

SHACK

sells or conveys such

Equipment

to a

third

party

for lease to

CUSTOMER.

The

limitations

of

liability

and Warranty provisions

herein shall inure

to

the benefit

of

RADIO

SHACK, the author,

owner

and/or

licensor of

the

Software

and

any

manufacturer

of

the

Equipment

sold

by

RADIO SHACK.

The

warranties

granted herein give the original

CUSTOMER

specific legal rights,

and the original

CUSTOMER

may have

other

rights

which

vary

from

state

to state.

Contents

Introduction

1

1/

Description

of

the DMP-200 3

Top Panel

4

Rear

Panel . . . .

.

5

2/

Setting

Up the DMP-200

7

Tractor

Installation and

Removal

*

7

How Does the

DMP-200

Handle Paper?

9

Paper Loading

9

Ribbon Installation/Replacement

13

Print Function (DIP) Switches

14

Setting the Rotary

Switch

16

Connecting

the DMP-200

to

a Power Source

16

Carriage

Movement

Test

17

Self-Test

17

Connecting

the DMP-200 to a TRS-80

17

Power-Up

Sequence

18

3/

Using

the

DMP-200

(General Printed

Operation).

....

19

Control

Codes

19

Sending

Control Codes

from

BASIC

20

Data

Processing

Mode

20

Word

Processing

Mode . .

. .

.

21

Graphics

Mode

21

Selecting

a Print Mode

21

4/ Print

Font

Styles and Character Widths

23

Selecting

Font Styles

24

Standard

Character

Font

Style

24

Correspondence

Quality Font

Style

25

Proportional

Spaced Font Style

25

Graphic

Characters

25

Right

Justification

26

Wrap-Around

27

Elongated

Characters

27

Bold

Characters

28

5/

General

Control

Codes

29

Line Feed

(LF)

29

Carriage

Return

(CR)

30

Backspace

(BS)

30

Setting

Top-of-Form

and Form Length

31

Form

Feed

(FF)

31

Ignored

or Undefined

Codes

31

DMP-200

Buffer

Operation

32

6/ Word and Data

Processing Modes

. .

. .

.

35

Superscript

and Subscript

35

Repeat

Printing

35

Underline Printing

36

Print

Head Positioning . .

36

7/

Graphics

Mode 39

Printing

Graphics

Patterns

40

Line Feed

41

Repeat Function

41

Print Density

42

Leaving

Graphics Mode

42

Mixing Modes

42

Free Hand

Drawing 42

Appendix

A/ Control

Code

Summary

45

Appendix

B/

Character

Sets

49

Appendix

C/

Programming

Information

55

Appendix D/

Care

and Maintenance

57

DMP-200

Printing

Limits

(Duty

Cycle)

59

Appendix

E/ Specifications 61

Introduction

Congratulations

for selecting

this Radio

Shack computer product! The DMP-200

is a

high-density

dot-matrix

printer

which

can perform a

variety

of different printing

operations.

For

instance,

it can

print:

•

Proportional

spaced

characters.

•

Monospaced

characters

(Normal,

Condensed and Compressed).

•

Correspondence

Quality

characters.

•

Graphic

characters.

For maximum efficiency

, the DMP-200 operates

in

three modes:

•

Data

Processing

Mode for fastest

output

of program listings or data.

•

Word

Processing

Mode

for letter-writing

or the creation of any text documentation

.

•

GraphicsMode

for drawing

pictures, figures,

or

graphs.

For word-processing,

you'll

find the

DMP-200's Proportional

spaced

characters (created

on

a variable

15x9 dot-matrix) can

produce letter-quality

results.

If,

however,

you need

a print-out that

is produced

faster, Monospaced characters (created

on

an

9

x

8

dot-matrix)

are just the thing for you!

In

the Graphics

Mode,

you can use graphic data

to

draw

just

about

any

type

of

graphic

configuration

you

desire.

You can

use

three

types of paper

with

the DMP-200.

•

Standard

(4"-

10"

wide)

computer

fanfold

forms

with

guide

holes. The Printer

can also

print

one original

and up to two

carbon-copies

.

•

Standard

single-sheet

typewriter

paper for

use

as an ordinary

typewriter.

•

Roll

paper

(8

Vi

wide) with

a

1"

core and

a

maximum diameter

of

5".

Other

software-controlled

features include:

•

Bi-directional

logic-seeking

carriage motion,

(uni-directional

in Graphic Mode.)

•

Full-

or

Half-Line

Forward

and

Reverse

(for printing

above

or below the

*

'current'

'

line)

and 3/4 Line

Feed.

•

Underline

capability.

•

Paper

Empty

sensor

automatically

stops the printer so you can replenish the paper.

•

Parallel

and

Serial

Interfaces.

and much

more

!

1/ Description

ofthe

DMP-200

Carefully

unpack

the

DMP-200, being sure to locate the Ribbon Cassette, the Paper

Tray,

the

Roll Paper Holder and

the

Roll Paper

Shaft. Keep the

empty box

and

packing

material

just in

case

you ever

need

to

transport

the Printer.

Be sure

to remove the protective

blackplastic

tube

from

the rear Carriage Guide.

Figure

1.

Removing

the

Black

Tube

It's

important

to

become

familiar with

the DMP-200 before you set it up and

begin

using it.

Figure

2.

DMP-200

(Top

View)

^

!?

WE

:

R

J

0n

i

n

u

di

^

t0r

-

Th

'

S

Indic3tor

wiI1

i^minate

when

the

DMP-^00

is

properly

connected

and

the

Power

ON/OFF

Switch

is

set

to

ON.

-uu

is

properly

@

i^

RT

IndicatC

f T

hls

lam

P

wiil

»me

on

when

the

Printer

is

out

of

paper

when

there

is

a

carnage

fault,

or

when

there

is

some

son

of

electrical

problem.

@

SSSSnt

T

E

S

,

WUCh

*

^^

SWkCh

mUSt

be

S£t

t0

0N

"

LINE

bef0re

«he

2JSS£Sr

HZ

pnntmg

at

anytime

orto

use

otherFront

Pane!

Switches

-

©

RESTART

Switch.

When

the

Printer

runs

out

of

paper,

pushing

this

switch

resumes

IZl

1

^-

?

e

V!

0p

after

com

P

leti

™

another

line

printing

or

loading

new

paSrTen

presses

Switch

to

return

the

Printer

to

its

statuf

before

the

out-oKr'cSndition

®

fhtswkch^n

J

en

u

hiS

S

WkCh

iS

pr£SSed

'

the

paper

wil1

advance

one

line

-

Holdine

theSwitch

down

will

cause

cont.nuous

paper

feed.

The

Printer

must

be

OFF-LINE

before

pressing

this

Switch.

®

1™%

°

N/0FF

SwitCh

-

Pr£SS

the

white

dot

t0

tum

the

P°

w

"ON

.

Press

the

Switch

the

other

way

to

turn

power

OFF.

Note

that

turning

the

power

OFF

and

ON

durin*

operation

may

cause

loss

of

the

current

program.

®

Print

Head

Control

Lever.

Move

this

Levertowards

you

(e.g.

.

move

the

Print

Head

away

from

the

paper)

when

changing

ribbons.

If

printing

is

faint,

move

the

Lever

away

ZZ^

?•*

'

*

e P™

1

"6

*1

towards

the

paper);

if

smudging

occurs

during

printing,

move

the

Print

Head

slightly

away

from

the

paper

® Platen

Pressure

Lever.

If

you are "friction

feeding"

paper (single sheets or roll

papaer),

position this lever toward the rear of the

printer to

apply

pressure

on

the Platen. If

you

are "tractor

feeding"

(fanfold), position this lever toward the front of the

printer.

CD

Paper

Bail

Lever.

For optimum print quality , keep

the Bail

down on the

paper (Lever

toward

rear of printer)

.

®

Tractor Feed.

See Setting

Up

the

DMP-200 for

derails on using the Tractor Feed.

©

Paper Feed

Knob.

Turn

this Knob

to

manually

advance

the

paper.

©

Paper Insertion

Opening. Be sure the paper enters the DMP-200

here (just

underneath

the black metal shield).

©

Paper

Guide

Rack. Prop this rack up

for single sheet paper

feeding,

down for fan fold

paper, and

remove

it for

roll

paper feeding.

When the

Printer

stops because

it is

out

of paper,

the

ALERT

lamp

will illuminate,

and the

Printer

automatically

goes

OFF-LINE.

To

continue

printing press

RESTART,

then

printing will be

done

one

more

line,

or insert more

paper

and

press

RESTART.

The DMP-200

will automatically go

back

ON-LINE

(and continue

printing

without

loss

of

data

in the

print

buffer).

Model II

users

:

If

a BASIC

program

stops execution

because

of a Printer error, typing:

C DNT

(ENTER)

after

you

have

put the printer

back

on-line

will

cause printing

to resume.

However,

the

entire

contents

of the

print

buffer

will

be

printed

starting with

the

current Print

Head position.

®

©

©

Figure

3. DMP-200

(Rear

View)

©

Parallel

Interface

Connector.

If your TRS-80 has parallel

interface

capabilities

,

connect

the

cable

here.

®

Serial

Interface

Connector.

If your TRS-80 has

serial

interface

capabilities,

connect

the cable

here.

See

Setting

Up the DMP-200 for

the

correct

cable

for

your TRS-80.

®

Function

Selection

(DIP)

Switch.

The settings of

this

switch

define the printer's use.

©

Rotary

Switch.

This

switch

selects the character

style to

be used

by the printer.

©

Power

Cord.

Plug

the

power

cord into

a

wall-outlet

or

approved power

strip.

2/ Setting

Up

the

DMP-200

This

section

will show

you how

to

set

up the DMP-200 so

you can

begin using it as quickly

as

possible. This includes:

•

Loading paper.

•

Replacing

a ribbon.

•

Connecting the

DMP-200 to a TRS-80

and

more!

The following

Start-Up

Checklist

is a

summary

of

how to

set up your Printer. You

should

follow

this

procedure every

time you start-up the

Printer —not just the

first time.

Find a good spot for

your Printer. Be sure to

consider:

•

The Printer

should be placed on a sturdy work surface.

•

The length of the printer

cable

will determine how far from the TRS-80 you can

place

the

Printer.

•

Papertakes up

space.

Be

sure to

leave enough room forsmooth paper

flow.

•

Don't place the Printer near noise generators such

as

refrigerators and

industrial

equipment.

Be sure the

POWER

switch

(at left side of Printer) is OFF.

Remove

the

Top Cover

and the packing materials.

Install

continuous

form fanfold paper,

single-sheet

paper,

or

roll

paper.

Refer to

Paper

Loading.

Check the Ribbon

Cassette. If it has not been installed, see Ribbon

Installation/Replacement.

Set

Front

Panel

Switches,

Rotary Dial and Print Function (DIP) Switch (rear of

Printer).

Connect

the AC

power

plug to a 3-wire,

120 volt,

60 Hz grounded AC outlet

(220/240v,

50 Hz where the

unit

is so marked).

Check that the

Printer

is

ready

by running the Self-Test.

Connect

the

interface

cable from the

TRS-80

to

the printer interface connector.

Turn the

Power

ON and

check

that

the

Power On

Indicator (on

the

Front Panel)

is

illuminated.

Push

the

RESTART

Switch.

Place

ON-LINE/OFF-LINE

Switch in

ON-LINE

position.

Tractor

Installation

and

Removal

This

printer

can

be

used

with

either the

Tractor

Feed system or the Friction Feed

system.

The

difference

is

that

the

Tractor Feed

system

is

used with

paper

which

has

guide

holes

on

both edges

while

the

paper

used

with

the

Friction

Feed

system does not

have

these

holes.

The

Friction Feed

system

may

be

used

with

the

tractor installed; however,

better

operation

can be acheived

if

it is

removed especially with single

sheets of

paper.

Removing

the

Tractor

1. Set

the

ON/OFF

Power

Switch

to OFF.

2.

Remove

the Top

Cover.

3.

Hold

the back

bar

of

the Tractor

(close

to the edges) between

the thumb and

forefinger

of

each

hand

and

pull

upward

to unlock

and remove the

tractor.

4.

Replace

the

Top Cover.

Installing

the

Tractor

1. Set

the

ON/OFF

Power

Switch

to OFF.

2. Remove

the

Top

Cover.

3.

Place

the

front

cutouts

in the

Tractor

unit

onto

the

outside

studs

(see Figure

4),

then

press

on the

rear

of

the Tractor

until

the back

posts

snap

into

place.

4.

Replace

the

Top

Cover.

Figure

4.

Installing

the

Tractor

8

How

Does

the

DMP-200

Handle

Paper?

The

DMP-200

provides

both

Tractor

Feed for

continuous

forms

and Friction Feed for

single-sheet

printing.

Paper

Loading

Warning!

When

loading

paper

(single-sheets,

roll

or

fanfold)

, be

sure

the

paper

correctly

enters

the

Paper

Insertion

Opening.

If the

paper

is

correctly

loaded,

it

should

enter

between

the

body

of

the

Printer

and the

Paper

Separator.

Once

the

paper

is

loaded

and

power

is ON

r

check

the

ALERT

Indicator.

If

the

lamp

is

illuminated,

press the

RESTART

Switch.

If the

lamp

remains

on, the

paper

is

probably

loaded

incorrectly

.

If the

lamp

is

not

illuminated

after

the

paper

is loaded,

you

mav

besin

printing

(if the

power

is

ON).

'

w

Single-Sheet

Paper

Loading

We

suggest

you

remove

the

tractor

feed

unit

before

loading

single-sheet

paper

into

the

DMP-200.

1.

Be sure the

Power

Switch

is OFF.

2. Remove

the

Top Cover.

3.

Gently

move

the

Print

Head Control

Lever away

from the paper.

4.

Move

the

Platen

Pressure

Lever forward

(toward

the front of the Printer).

5

.

Insert the

paper

into the

Paper

Insertion

Opening

(underneath

black

shield)

and push

the

Release

Lever

back

towards

the rear of the Printer.

Use the Paper

Feed

Knob to

advance

the

paper

until

it appears

between

the Platen

and the

Print Head. (See Figure

5)

6.

Move

the

Release

Lever forward

and align the

paper.

Push

the Release

Lever

back

again.

7. Set the

Penetration

Control Lever

to the

appropriate

position.

•

Single-Part

Forms.

Move

the

Lever

towards

the paper as far

as it will

go.

•

Multiple-part

Forms.

Move the

Lever

as far as it

will

go toward the

Platen

without

smudging

the

paper.

Check for smudging

by

moving the

Carriage

back

and

forth at

each of

the

Lever

settings.

Note:

If you use

carbon paper or

other

duplicate form

paper

with

the

friction

feed

system,

take

extreme care when

setting up and printing out with

the

paper.

A

slight

shifting

of paper between

the

original

and the

copy could

occur

resulting

in

poor

printing or

improper

registration.

Warning!

The

Penetration

Control Lever must

always

be as

close

to

the

platen

as

possible;

otherwise

damage

to the Print Head may

result.

8.

Replace the

Top

Cover.

Note:

When the

Paper

reaches the

end of

a page, the

printer

will automatically

stop

printing about

2"

from

the bottom of

the

page.

If

you want to

print

a

few

extra

lines,

press RESTART

and another

line

will

be printed. Press

RESTART more and

another line

will be

printed,

etc. We

do

not recommend

that

you print

more

than

three

extra

lines if you

are

using Friction

Feed

^,

(single

-sheet).

We

do

not

recommend

that

you attempt

to use

the

RESTART

Switch

if

the

extra lines

require

reverse line

feeds

(superscript

or subscript

for

example).

If

you

do

not want

to

print

extra

lines,

load

a

new

piece

of paper

into

the

printer and

press

this

switch

once.

The

printer

will

be restored

to

the

status

just before

the

"out-of-paper"

condition

occurred.

PRINTER

! j

Paper

RIGHT

PRINTER

/,

/

'

?

Paper

^

WRONG

\

I

A L

Figure

5. Single-Sheet

Paper

Feeding

Roll

Paper

Loading

1. Set the

Power

ON/OFF

Switch

to OFF.

2.

Be sure that there

is enough

space on a flat, wide surface behind the Printer for the Roll

Paper Holder.

3.

Insert both

support

arms of the Paper

Holder

into the

two

round holes in the top rear

o(

the

Printer and place the other

end

of

the

Holder

on the

flat

surface.

4.

Insert the Roll Paper

Shaft

through

the standard

1"

roll

paper

core. Place the Paper

Shaft

assembly

onto

the

Holder so that

the

paper feeds

from the bottom of the roll . (See

Figure

6.)

5.

Move

the Print

Head

Control Lever

away

from the Platen.

Refer to Figure

7.

6.

Move

the

Platen

Release

Lever

and the Paper

Bail Lever forward.

7.

Insert the end

of the

paper

into the

Paper Insertion

Opening,

then

push

the

Platen

Release

Lever

towards

the

rear

of the Printer.

Turn the Paper Feed Knob until the paper

appears between

the

Platen

and the Paper Bail.

8.

Pull

the Release Lever

forward

and pull out the

paper

approximately

2".

Be

sure the

.

paper

is straight,

then

push the Release

Lever back.

9.

Adjust

the Paper

Guides

on the

Roll

Paper

Holder

so

that

there is a

very

small space

between

the

guides

and

the

edges

of the paper.

10.

Move

the Paper

Bail

towards

the paper.

1 1

.

Move the

Print

Head

Control

Lever

as far as it

will go

towards

the Platen.

Warning!

The Print

Head

ControlLever must

always be

as

close

to the

Platen as

possible

to avoid

possible

damage

to the Print

Head.

12.

Replace the Top Cover.

Note:

The

DMP-200

can only

use

roll paper that

is

not greater

than

5"

in

diameter.

Radio

Shack catalog number

26-1402

is

ideal for this

printer.

10

Figure

6.

Roll

Paper

Feeding

Figure

7.

Roll

Paper

Installation

Hints

and Tips On

Single-Sheet

Paper

and Roll

Paper

Loading

.

.

.

•

With

the paper

properly

installed,

printing

will continue

until

the

paper

passes

the

Paper

Empty

Sensor. The

Printer

will then

go off-line

and the Alert

lamp

will

light.

Insert

another

piece

of paper and turn

the

Paper

Feed Knob to

advance

the

paper.

When

the

paper

is in place, press the

RESTART

Switch

and

the DMP-200

will

continue

printing

from

where

it left off.

•

Remember to

set the

Platen

Pressure

Lever

to the rear of the Printer

while

using

single-sheet

paper, and keep the Paper Bail

down

for maximum

print

quality.

11

Fanfold

Paper

Loading

The

DMP-200 will

accept standard

fanfold

and mailing label strips from

4"

to

10"

wide.

The

paper

may be either

single or

multi-part,

up to three pans total.

To load fanfold

paper

into the DMP-200:

1. Set

the Power

ON/OFF Switch to

OFF.

2.

Remove

the

Top Cover.

3.

Move

the Print

Head

Control

Lever away

from the paper. Refer

to Figure

8.

4.

Move

the

Platen

Release Lever

and the

Paper

Bail Lever toward

the

front

of the printer.

5

.

Pass

the

paper

through the

Paper

Insertion Opening

.

(If

the Roll

Paper Rack is

installed,

pass the paper

underneath

the center of the rack then through

the

Opening.

)

Return

the Release

Lever

and

turn

the Paper Feed Knob

to

advance

the

paper.

6.

Move

the Release

Lever

towards

the front once again and

pull out

approximately

6"

of

paper.

7

.

Raise

the

clamps

on the

Paper

Feed

Sprocket

Units. Align the paper guide holes with

the

sprockets

and

snap

the

clamps

back onto the sprockets.

•

If the

paper

guide

holes

do not fit over the

sprockets

, release the lever

on

the

Sprocket

Units,

re-position the

Unit, then snap

lever

close.

If

the paper

is stretched

too tightly

or is loose

and

wrinkled,

it may not feed through correctly.

•

Be sure

that

the

paper is straight

(i.e., even

across

top

of page) when

it is clamped

onto

the

sprockets.

8

.

Adjust

the

Paper

Guides

on the

top

rear of the

Printer

so that there is a small

space

between

the

Guides

and the

paper

edges

.

9.

Adjust

the

Print

Head

Control Lever

as

follows:

•

Single-Part

Forms.

Move

the

Control

Lever toward

the

Platen as far

as it

will

go.

•

Multiple-Part

Forms.

Move

the Lever

toward

the

Platen as far

as

possible

without

smudging

the

paper.

Check for

smudging

by

manually moving

the

Carriage back

and

forth

across the

paper

at each

of

the

Lever

settings.

Warning!

The Print

Head

Control

Lever

must

always

be as close to the Platen

as

possible,

otherwise

damage

to the

Print

Head may result.

10. Replace

the

Top

Cover.

Figure 8. Fanfold

Paper

Loading

12

Hints

and Tips On

Fanfold Paper Loading

. .

.

•

Whenever

the Tractor Feed

is

used, the Platen Pressure

Lever

must

be

toward

the

front

of

the

Printer.

For friction feed paper, set the

Lever

to

the

rear of the Printer to apply

pressure

to the

paper.

•

Be sure that the paper

is

positioned

so

that it can

travel through

the printer

without

binding.

•

Do

not

let

paper

pile

up on

top of

unprinted paper or

printed paper may be pulled back

into the

Paper Insertion Opening. This could jam the

paper feed

or

damage the Printer.

Ribbon

Installation/Replacement

If the Ribbon

Cassette

is

already

installed,

simply check to

see

that

it

is

properly threaded

between

the

paper and Print

Head.

See

Figure

9.

If the Ribbon

Cassette is not

installed,

or

if it must

be

replaced due to

excessive

wear,

faint

printing,

etc. ,

follow this

procedure:

1

.

Set the

Power

switch to OFF.

(Note:

When you turn

the

power

OFF,

any

information

stored

in the

Printer's

buffer

will

automatically

be

lost.)

2.

Remove the

top

Cover

and gently

move

the

Print Head

Control

Lever

toward

the

front

of the

Printer as far as it

will

go

.

3

.

Gently

grasp

the Print

Head

towards

the center

of

the

printer.

4.

To

remove

the used Ribbon

Cassette,

grasp

the

Cassette

by

the edges

nearest

to the

platen and lift it

upwards.

5.

Before

installing

the

New

Cassette,

tighten its

ribbon

by

turning the

knob

on

the

Cassette in

direction

indicated by

the

arrow.

6.

Gently press the

Cassette

down until it

is firmly

secured by

the

"stopper

claws/'

Do

not force the

Cassette

into

place ! If the

Cassette

is

not

properly

fitted, the

Cassette

knob

will not

match up

with

the

shaft

from

the

Carriage.

Do

not

force

the

Cassette

down

but

fit it in

gradually while turning

the

Cassette

knob

in

the

indicated

direction.

7.

Once

the

new Cassette

is installed,

gently slide

the

ribbon

in

between the

paper

and

the

Print Head.

Tighten the

ribbon

by turning

the

Cassette

knob in

the

indicated

direction.

8.

Move

the

Carriage

back and forth

manually

to

check that

the ribbon

advances

properly.

If

the ribbon has not

been

properly fitted

between

the paper

and Print

Head

(i.e.

,

into

the

Print

Head Ribbon

Guide

Bezel) , the

Ribbon

feed

will

not

operate

smoothly.

9.

Move the

Print

Head Control

Lever

towards the

rear of

the Printer.

10.

Replace

the Top

Cover.

Remember! It is

extremely

important

that the

Print Head

is as

close

to

the

paper as

possible;

otherwise damage

to the

Print

Head

may

occur. To

find

the

proper

distance

,

move

the

PrintHead Control

Lever

towards

the

paper and move the

Carriage

back

and

forth

until smudging

occurs.

Then

gradually

move

the

Control Lever

away

from

the

paper

until

the

smudging

stops.

13

Figure

9. Ribbon

Cassette

Installation

Print

Function

and

Character

Selection

Switches

There

are

two

switches

at

the

right

rear of the

Printer; one

DIP

Switch

and

one Rotary

Switch.

These

switches

allow

you to

customize

some of the

DMP-200

features for

your

own

applications.

Setting

the

Print

Function

Switch

(DIP

switch)

When

you

receive

DMP-200,

all

Switch

positions should

be

set to OFF

(i.e.

, in the down

position).

By

setting

certain

DIP

Switch

positions

ON,

before

turning

the

DMP-200'

s

power

ON, you can select

different

processing

modes,

interface

modes,

baud

rates, etc.

Table

1

defines the DIP

switch

settings.

These

switches

establish

the

power

up defaults for

the

DMP-200.

14

Pos.

Symbol

OFF

ON

NUCR

DP/WP

1200/

600

BPS

Parallel/

Serial

Not

Used

Not

Used

Not

Used

generates

"CR +

LF"

operation

Data

Processing

Mode

1200

Baud

trans-

mission

rate

for serial

interface

mode

Parallel

interface

mode

CR

causes

Carriage

Return

operation

only

Word

Processing

Mode

600 Baud

trans-

mission

rate

for

serial

interface

mode

Serial

interface

mode

European/

European

Symbol

Japanese

KANA

set

KANA

set

selected

in

will

be

selected

the

codes

A0

through

in

the

codes

A0

BF(Hex)

through

DF

(hex)

Table

1

Remember!

The

Printer

power

must

be

OFF

before

you

change

any

of

the

Switch

settings.

WP

Serial

Not

used

Not

used

CR

ID

600BPS

KANA

U

D

U

U

Not

used

U u

3

4

5 6

7 8

Nl_

I2008F5

European

Not

used

ON

SIDE

OFFSIDE

DP

Parallel

Not

used

Not

used

Figure

10. Function

Switch

Settings

15

Setting the

Character

Selection Switch

(Rotary Switch)

This

switch

selects

the desired character pitch

(i.e.

,

number

of

Character Per Inch

—

CPI)

.

This

is

also referred

to as character spacing since the DMP-200

adjusts the

space between

the

font style characters

you

have selected.

Always

set

the Switch

when

the

power

is OFF.

When

the

Printer is

switched

ON,

the

rotary

switch

condition is

recognized

and the initial

character

style

set into memory. Table 2 describes the Rotary

Switch settings.

CHARACTER SELECTION SWITCH SETTINGS

Position

Character

Style

Standard 10

CPI

1

Compressed

(Elite) 12

CPI

2

Condensed

16.7

CPI

3

Proportional

4

Correspondence

,„

-™

>

10

CPI

Quality

j

5
6

7

8

Standard

10 CPI

9

Compressed

(Elite)

12

CPI

Table

2

Wj

J

Figure

1 1

.

Rotary

Switch

Set For

Normal

Printing

Connecting

the DMP-20Q

to

a

Power

Source

Before

plugging the

power

cord

into

an AC

power outlet,

check the

following:

Is

Printer Power

ON/OFF

Switch

set to OFF?

Have

you

removed

the black

plastic

protective

tube

from the Carriage

Guide?

Don't connect

the Printer to the

Computer

yet.

Connect

the AC

power

plug to a

3-wire,

120 volt,

60

Hz

grounded

AC

outlet

(220/240v,

50

Hz

where

the unit

is

so

marked)

or an approved

power

strip such as the

Radio Shack

Plug-In

Power

Strip

(6

1

-26

1

9)

or the

Automatic

Power

Controller,

S

W-30

1

(26-

1429)

.

16

Carriage

Movement

Test

The

Carriage

Movement

Test

allows you

to check that the Carriage

moves

freely from one

end

of

the Platen

to

the other

and that

the

Platen is turning properly.

Printing

is not performed

during

the Carriage

Movement

Test.

1

.

Set

the

ON-LINE/OFF-LINE

Switch to

ON-LINE.

2.

Press and

hold the RESTART

Switch while

setting the

Power

Switch

to ON.

The

Carriage will

move back

and

forth,

performing a Line Feed at the end of each line.

3

.

Turn the

power

OFF

to

end

the Carriage

Movement

Test.

Self-Test

The

DMP-200

has a

'

'built-in'

*

self-test

feature

which

lets you check printing quality and

general

printer operation before

you

connect the

Printer

to a

TRS-80. This

is a

good

time

to

check that the

Print Head is adjusted

properly (printing is neither too faint or smudging

occurs) and

if the

paper is

feeding

properly.

*

Printing

character font styles will

be

selected

in accordance with Character

Selection

Switch setting.

Before

running

the Self-Test, however, always

be

sure to load the DMP-200

with

10"

wide

paper since the

Test prints

from one end of the

Platen to

the other.

Printing

on the

Platen can

shorten

the

life

of

the Platen and the Print Head.

To run the

Self-Test:

1

.*

Plug

the

Printer

into an

AC

power

outlet.

2.

Set the

ON-LINE/OFF-LINE Switch to OFF-LINE.

3. Press

and hold the RESTART Switch.

4.

Set the Power

ON/OFF

Switch

to

ON.

The Printer

will begin

printing all the characters that it's capable of printing.

5.

If the printing

is too light,

gently move the Penetration

Control

Lever

towards the

paper.

If printing

is

too

dark or

begins smudging,

move

the Penetration Control

Lever

away

from

the

paper

slightly.

6. Printing

will

continue

until you

turn

the

power

OFF.

Connecting

the

DMP-200

to

the TRS-80

Before

making any

connections

between

the Printer and TRS-80, be sure all

units

are

off!

You must also

be

sure you have the

correct cable

for your TRS-80 if the

DMP-200

is

to

operate properly.

Table

3

describes

the printer cables

Radio

Shack

provides; Table

4

provides

quick instructions

for printer connection

locations.

1

.

Attach

the molded

male

end of the cable to

the

connector at

the left

rear of

the

Printer.

Do not

force the plug.

If it doesn't

fit one

way,

turn it

over

and try

again.

2.

Connect the

other end

ofthe

cable to the Printer

Jack

ofyourComputer.

See

your

TRS-80

owner's

manual for

specific

instructions.

17

TRS-80 to DMP-200

Cables

TRS-80

Cable

Number

Model

I

(Keyboard

only)

Model

I (Exp.

Interface)

Model

II/16/DT-1

Model III

Color

Computer

26-1411

26-1401

26-4401

26-1401

26-3020

Table 3

TRS-80

Connection Points

TRS-80

Connector

Model

I

(Keyboard

only)

Model I

(Exp.

Interface)

Model

11/16

Model lll/DT-1

Color

Computer

Rear

of Keyboard

Left

side of E.I

Rear Panel of Computer

Underneath

panel

Rear

Panel

of

Computer

Table 4

Power-Up

Sequence

The

specific

power-up

sequence will

depend upon your Computer.

We

suggest

you

consult

your TRS-80 owner' s manual

for

details

on

powering

up

your

TRS-80

with

peripheral

devices

(such as printers).

In any

event, the

Power

Lamp

will

remain lit

while

the

Printer is ON.

It is

essential that the Printer

remain ON

when

connected to the

Computer. If you rum the

power

ON or OFF, or a Printer

is connected

but not turned on,

erratic operation of the entire

system may occur.

18

3/ Using

the DMP-200

(General

Printer

Operation)

The DMP-200

is

designed

for three distinct applications:

•

Data

Processing

•

Word

Processing

•

Graphics

Printing

The

Printer

has three

different

ways

it

responds to software codes from the TRS-80

—

one

for each application.

The

three response

patterns,

or modes;

have

many

similarities, but

each

has its own

unique

features

.

Data

and Word

Processing

modes are

used for printing characters. The only

difference

between

these two

modes

is the way

they handle

Line Feed

commands

(commands

that

decide

which

direction

and how

far

the

paper

is

fed)

.

•

In the

Word

Processing

mode,

each Line

Feed command

causes immediate paper

advancement.

Word

Processing

programs (such as SCRIPSIT)

can

use

immediate line

feeds for

superscripts,

subscripts,

and the

like.

•

In

the

Data

Processing

mode, Line

Feed Commands

do

not cause

immediate printing.

Instead,

they are stored

in the

Printer's

memory along

with

the other data. When the

current line

is printed,

the Line Feed commands stored in memory

determine the

direction

and

pitch

of the

paper

feed.

Both Data

and

Word

Processing can

print

in

different

Print Font Styles

and

in

different

Pitches

(character

spacing).

One font style is

the

Proportional character

set and the other is

Monospaced

character

set.

•

Proportionally

spaced

characters have variable widths: an

M takes

up

more

space

than

an I.

Proportional

characters

are

used to create professional

looking

documents.

•

Monospaced

characters

are

so named because each character takes up

the

same

width.

This

uniformity

makes

it

preferable for tables and charts that

require

vertical

alignment.

The font

styles are

determined

by the dot-matrix

pattern.

Monospaced

characters

use

a

9

x 8

and 12x6

matrix while

Proportional

spaced

characters

use 15 x

9,

and n x

9.

The Print

Pitch

(character

spacing)

is

determined

by the space the DMP-200 puts between

each

printed

character

and also

by the Font Style. Consequently, you

must

think of

Pitch in

terms

of the

number

of characters

printed

per inch— 10 CPI, 12 CPI, and 16.7 CPI

for

Standard

printing

and

5

CPI,

6 CPI, and

8.3 CPI

for Elongated

printing.

In Graphics

Mode,

you

have

complete

control of the Print Head.

This Mode can

be

used

to

create a

custom

letterhead,

designs,

special

type

fonts, etc.

However,

with

Graphic

operation,

many control

codes

(which

can be

used

with

Data

and

Word

Processing)

cannot

be used. The DMP-200 doesn't return an

error when

you send

such

a

code

—

it simply

ignores the code . This includes

codes

that

change

line

feed pitch

and

direction.

Graphics

Mode

uses

only

one

line feed {HIT) to insure full coverage

of

the

paper.

Control

Codes

Before

investigating

the various

print

modes,

consider how

the TRS-80

communicates

with

the

Printer.

«

All

information

is

sent

to the

Printer as numbers

between

and

255 decimal

(00

—

FF for

you

Hexadecimal

fans).

The

Printer interprets these

numbers

according

to the

American

Standard

Code

for

Information

Interchange,

commonly

referred

to

as the

ASCII

code. (See

19

Appendix

A

for

a list

of

ASCII

codes.)

Most

numbers

(or codes)

are

printed

as

letters,

numbers,

or

symbols.

However,

the

numbers

—

3

1

, as

well

as

some

special

sequences

of

code

numbers,

are

used

to

"control"

various

functions

ofthe

Printer.

These

"Control

Codes"

allow

you

to

change

character

sets,

select

print

modes,

underline,

superscript,

subscript,

etc.

The

Control

Codes

have

different

meanings

depending

on

the

current

print

mode.

If a Code

is

not

recognized

by

the

Printer,

it is

printed

asX

The

next

few

sections

demonstrate

how

some

of

the

Control

Codes

activate

various

Printer

functions.

Read

these

sections

carefully.

Sending

Control

Codes

from

BASIC

Some

Printer

features

are

activated

by

a single

code,

but

many

functions

require

a

sequence

of

two

or

more

codes.

Most

multiple

code

sequences

begin

with

decimal

27

(referred

to

as

the

'

'ESCape

'

'

code)

.

The

ESC

code

notifies

the

Printer

that

a

special

sequence

is

on

its

way.

The

next

code(s)

sent

determine

which

Printer

feature

is

selected.

In

BASIC,

use

CHRS(

)

to

send

these

codes

to

the

Printer.

Note:

This

section

will

use

the

command

LPRINT

in

examples

that

send

codes

to

the

Printer.

If

you're

using

aTRS-80

Color

Computer,

substitute

PRINT#-2,

for

LPRINT.

For

instance

,

set

up

the

DMP-200

as

described

earlier

and

enter

BASIC

in the

normal

way.

Then

type

the

following

program:

10

REM

20

LPRINT

"DATA"

iCHR$<27)

;CHR$(2S)

5

"PROCESSING"

30

LPRINT

"MODE"

and

RUN

it.

Roll

the

paper

forward

and

look

at the

results

.

The word

MODE

printed

over

part

of

the

word

DATA.

Why?

The

codes

CHRS(27)

and

CHRS(28)

are

the

guilty

parties.

Take

a

quick

look

at

Appendix

A.

This

chart

shows

the

various

code

sequences

understood

by

the

DMP-200.

The

Control

Code

sequence

CHRS(27);CHRS(28)

means

"change

the

forward

line

feed

to half

its

normal

distance'

'

.

Data

Processing

Mode

How

can

you

tell

which

mode

the

DMP-200

uses

when

it's

first

turned

on? A

little

reflection

on

the

above

program

tells

you

all

you

need

to know.

Line

Feed

commands

are

executed

immediately

in

Word

Processing

(WP)

Mode, but

not

in

Data

Processing

(DP)

Mode.

The

(27

28) sequence

didn't

cause a

Half

Forward

Line

Feed

until

after

the

first

line

was

printed.

Thus,

the

Printer

must

be

in DP

Mode. And,

in

case

you

missed

it,

this

new

Line

Feed

stays

in

effect

until

further

notice

(another

characteristic

of

DP

Mode).

Type:

LLIST

fENTEH)

Sure,

enough.

You still

have

that

short

Line Feed.

20

Word

Processing

Mode

If the same

program

were

executed

in WP

Mode

, the Line Feed

would have

occurred

immediately

after

the

word

DATA

.

Go

into

WP Mode

and try it. To enter

WP

Mode,

change

line

10

to:

10 LPRINT

CHR$<20)

:REM

CHR$<20)

SELECTS WP MODE

and

RUN

the

program.

Just as

you

suspected,

the

Line Feed is

immediately

executed.

Note that

in

WP

Mode, the new

Line Feed

is only temporary. Type: LL I ST (ENTER)

to

prove

that

the Half

Forward

Line Feed occurs

only once,

then

returns

to normal.

Graphics

Mode

Graphics

Mode is

very

different

from

the other two printer

modes.

For

one

thing, Graphics

Mode

accepts

only

one

Line Feed

code

—

CHR$(

1

0)

. This Line Feed is fixed at

7/72".

Furthermore,

only

a

few

ofthe

WP

and

DP features are available

in

Graphics Mode.

Standard

letters

and

symbols

,

for

example

, are ignored by the Printer

when

it is in Graphics

Mode.

Instead,

numeric

data

from

128

to 255 is translated

into dot patterns for the

Print

Head.

This lets

you

produce

high-resolution

graphic

print-outs of charts, logos, etc.

For a

quick

look

at

this

Mode in action , change

our test program

to:

10

LPRINT

CHR$<

18)

20

FOR

1=128

TO

255

30

LPRINT

CHR$<

I

)

;

40

NEXT:

LPRINT

CHR$(30)

and

RUN

the

program.

CHRS(18)

puts

the

DMP-200

into

Graphics

Mode. The numbers

128

through

255

are

interpreted

as

dot

patterns.

Type:

LPRINT

CHR$

(

30 )

dSlER)

to return

the

PrintertoWP

Mode. Try LLISTing

the

program

to be sure

you're

not

stuck

in Graphics

land.

Selecting

a Print

Mode

Appendix

A lists

the Control

Codes

required to

move

from one

mode

to another.

Hints

and

Tips

About

Print Modes. .

.

Data

Processing

Mode

•

All commands

which decide

Line Feed pitch and the direction ofmovement are

stored in

the

Printer's

memory.

They

are

not executed until a LFcode

(

10 Dec. or

138

Dec.) is

received.

Then

, the paper advances

according to

the pitch and

direction

codes

stored

in

the

Printer's

memory.

•

Line Feed

commands

stay

in

effect until replaced by

a new

command.

•

All

printable

characters

(except

user-defined Graphics) can be printed in this

mode.

•

To

go from

Data

Processing

Mode to Word Processing Mode, send

a DC4

code

(20

Dec).

21

Word

Processing

Mode

•

Line

Feed

codes

that

determine

pitch

or

direction

are executed immediately.

•

Line

Feed

pitch and

direction

changes

affect only the

current

print line.

•

All

printable

characters

(except

user-defined

Graphics)

can

be printed in this mode.

•

To

go from

Word

Processing

Mode

to Data Processing Mode, send

a DC3 code

(19

Dec).

Graphics

Mode

•

This mode

is very

different

from

the other

two

modes.

In Graphics Mode, only one

Line

Feed

code

(

1

Dec

.

)

is

acceptable

.

The

LF

code

causes the paper to move

7/72"

forward.

No other

pitch

or direction

is allowed

.

•

Only a few

code

sequences

are recognized

in Graphics

Mode. The DC3 and

DC4

codes

mentioned

above

will

be ignored

in

this

mode.

22

4/

Print

Font

Styles

and

Character

Widths

The

DMP-200

has four

distinct

print

(character)

font styles:

•

Standard

•

Correspondence

Quality

•

Proportional

•

Graphic

Characters

Each

font.sty

le

is created

with

a unique

dot

pattern

laid out

in

a grid

or matrix.

The

character

styles

differ

in

the size

of the

matrix and the

way

individual

characters

are

created

within

the

matrix.

The

horizontal

dot

positions

overlap;

the

vertical

ones

don't.

Table

5

shows

that

there are

three

basic

Pitches:

•

Normal

•

Compressed

•

Condensed

If

a

font

style

is

changed

in a

line

without

changing

the

pitch, the line

is printed

continuously

without

pausing.

For

example,

the DMP-200

will

not pause

while

changing

from Standard

Condensed

16.7

CPI

printing

to

Correspondence

Quality

Condensed

10 CPI print since

both

use

the

same

dot

density.

On the

other

hand,

if

the

density

of the

new

style character

is

different

from the

preceding

one

,

the

Printer will

print

the

current

buffer

contents ,

leave

some

blank

space,

then

resume

printing

in

the

new

character

style.

For example, this

will

happen

if you

change

from

Standard

Compressed

to

Correspondence

Condensed.

Standard

Condensed,

Correspondence,

and Proportional

characters

all have

the same

dot

density.

Standard

Normal and

Compressed

are unique

unto

themselves.

Character

Widths and

Densities

Font

Style

Matrix

Size

Pitch

Standard

9x8

Normal

10 CPI/Elongated

5

CPI

Compressed 12

CPI/Elongated

6

CPI

Condensed 16.7

CPI/

Elongated 8.3 CPI

Correspondence

Quality

15x8

Condensed 10 CPI/

Elongated 5 CPI

Proportional

n x

9 Variable width

(Condensed)

Graphics

12x6

Normal 10 CPI

Compressed

12 CPI

Condensed 16.7

CPI

Table

5

23

Selecting

Font

Styles

Character

font

styles

may

be

selected

by

the

Rotary

Switch

setting

before

power-up

(i.e.,

via

hardware)

or

by

Control

Codes

from

the

TRS-80

(i.e.,

via

software)

during

operation.

The

Rotary

Switch

determines

the

character

style

selected

on

power-up;

after

that,

you

control

the

styles

via

Control

Codes.

Font

styles

stay

in effect

until

another

font

style is

selected.

Even

entering

Graphics

Mode

does

not

change

the

font.

The

DMP-200

returns

to the

last

active

font

on feaving

Graphics

Mode.

Table

6

is

a

summary

of

the

Character

Style

change

commands:

Set

Rotary

Or

Send

a

CHRS(

):

If You

Want:

Switch

To:*

or 8

27 19

Normal

1

or 9

27

21

Compressed

2

27 20

Condensed

3

27 17

Proportional

4-7

27

18

Correspondence

Quality

27 14

Start

Elongation

27

15

End Elongation

27

31

Start

Bold

27

32

End

Bold

*

Rotary

Switch

must

be

set

before

power-up.

Table

6

Standard

Character

Font

Style

The

Standard

character

set

is

printed

in a

9x8

dot

matrix

(9

dots wide

by 8 dots high)

.

Each

of the

Standard

characters

can

be

printed

in three

main

character widths:

•

Normal

1

Characters

Per

Inch

(CPI)

•

Compressed

12

CPI

•

Condensed

16.7

CPI

Each

of these

widths

can be

elongated

(double-width)

which

gives

half as many

characters

per

inch

and

a

total

of

6

different

print widths.

You

can

get a better

feel

for the

different

available

print widths

by printing a few

sample

lines.

Type

in

this

program:

NEW

CENTER!

110

F$="STANDARD"

120 N=19:

W$=

,,

N0RMAL"

:

GOSUB

240

130

N

=

23:

W$=

H

C0MPRESSED":

GQSUB

240

140 N

=

20:

W$=

,,

C0NDENSED"

: GQSU5

240

230

LPRINT

CHR$(27)

CHR$(19):

STOP

240

LPRINT

CHR$(27)CHR$(N)

F$

"CHARACTERS"; W$

!

"DENSITY"

250

RETURN

and

RUN

it.

The

subroutine

in line

240

sends

the

required

Control

Codes to the

DMP-200.

Line 230

returns

to

Normal

character

width

and

stops

program

execution.

24

Correspondence

Quality

Font

Style

The

second

character

set is a

15 x

8

dot

matrix

character

set

for Correspondence

Quality

10

CPI.

The

characters

have

the

same

total

width

as Normal width

characters,

but they are

printed

with

the

Condensed

character

density

(15

dots

wide

fits

in the same space

as

9 dots

wide)

.

Correspondence

Quality

print

can be

elongated

to

5 CPI.

Correspondence

Quality

characters

appear

to

be the same

as Standard

characters

in

Normal

width,

but

they

are

an

entirely

unique

character

style.

Add

these

lines to the

program,

then

compare

the

two

styles

.

150 F$=:

,,

C0RRESP0NDENCE

,,

:

LPRINT

1S0

N=18:

W$="C0NDENSED"

:

GUSUB 240

and

RUN

the

program.

The

difference

between

some

characters

is very

slight,

but the and W

are quite

different.

This is a

good

style to

use

with

word

processing

programs

that

do not

support

proportional

characters.

Proportional

Spacing

Font

Style

The

third

character

set

is the

Proportional

spaced

character set.

This character

font style is

the

same

as

Correspondence

Quality,

but

the

character

matrix width

varies

from character to

character.

The

characters

are

9

dots

high;

the widths

vary

from

10 dots to 20

dots (including

5

columns

of

blank

dots to allow

space between

the

characters).

Proportional

characters

add

a

quality

look

to word

processing

documents

by

eliminating

wide

gaps

between

characters.

These

characters

can also

be elongated

to double their

normal

width.

Graphic

Characters

The

fourth

character

set

is a

12

x

6

dot

matrix

character set

used

for

Block

Graphic

printing.

The

characters

can

be Normal

10CPI

width,

Compressed

12 CPI, or

Condensed

16.7

CPI.

This

set

is

not

fully

compatible

with

the screen

graphics

of any of the

TRS-80 computers;

rather

it

is

a

unique

character

set.

A

1

2

x

6

dot

matrix

character

set

is

available

in Normal 1 or 5

CPI

, Compressed

1

2 or 6 CPI

and

Condensed

1 6 .

7

or 8 .

3

CPI

character

conditions

. The

Graphic

Characters are

not

available

with

Correspondence

Characters

or Proportional

Characters.

To

see

how

the

various

character

widths

affect the

graphics

characters,

add:

W$=

n

N0RMAL"

:

F$=

"

GRAPH

IC " :

LPRINT

240:

GOSUB

2G0

W$="COMPRESSED"

: GOSUB 240:

GOSUB

260

W$=

t,

C0NDENSED

n

:

GOSUB

240:

GOSUB

2G0

=224

TO

254:

LPRINT

CHR$(I)i:

NEXT

I

*

270

LPRINT:

RETURN

and

RUN

the

program.

190

N=19:

200

GOSUB

210 N

=

23:

220

N

=

20:

2E0

FOR

I

25

Since the

normal

line-to-line

spacing

is

1/6"

or 12 dots high and the

Graphic Characters are

6

dots

high,

we can

create

continuous

vertical

graphics by using the Half

Forward

Line Feed

(CHRS(27);CHRS(28)).

Add

these lines to the program:

10

LPRINT

CHR$(27)

5CHR$(28)

;

20 FDR

R=l

TO

3

30 FOR

C=l TO

7

40 READ

N:

LPRINT

CHR$(N)

i

50

NEXT

C:

LPRINT

60 NEXT R:

LPRINT

CHR$ < 27 ) ;CHR$

(

54 ) ;

70 DATA

241 ,243

,241

,224*241

,243,241

80

DATA

224,244,241,241,241,249*224

30 DATA

241,248,241*224,241,248,241

and

RUN.

When

you've

printed out the

results, delete

lines 10 through

90.

Right

Justification

Proportional

Characters

are

designed

to be

used with

word

processing programs. They

don't

carry

around

all the wasted

space between

words that monospaced print styles

do.

As

a

result,

you can sneak in

little

slivers

of space between

characters

to line up the right margin

of

text on a page

without

destroying

the nice

character spacing.

This

process,

called

*

'Right

Justification,

"

is usually

handled

by

word

processing

software.

The DMP-200

provides

codes

to allow

you to insert

spaces between

characters ranging

from

1 dot

to

9 dots

wide.

You can

demonstrate the way

these

codes work

by modifying the current

program. When

you add the following

two

lines

, the DMP-200

will

print

two lines

of Proportional

Characters,

then

insert

enough space

to

line up the right margins.

70 DATA

"THE

PROPORTIONAL

CHARACTER SET OF THE"

80

DATA "DMP-200

PRINTER

CAN BE

RIGHT

JUSTIFIED"

The

lines will

be read in

as

a

string of characters with the

MIDS function.

Enter:

10 LPRINT

CHR$(27)

5CHR$(17)

5

20 FOR

1

=

1

TO

2:

READ

A$

30 FOR

J=l TO

LEN(A$)

40

LPRINT

MID$(A$,J*1)

;

50

REM

G0 NEXT

J: LPRINT:

NEXT

I

90 LPRINT CHR$(27)

?CHR$(

19)

: END

Now

RUN

the program.

To line up

the right edge

, insert a single blank

dot column between

the first 22 characters in

the

second

print line. Add:

50

IF

1=2

AND

J<22

LPRINT CHR$ ( 27 ) ;CHR$ ( 1 ) !

then

RUN

the program.

Table

7

may help

when

inserting

spaces.

If a

Proportional

space command

is

used

at the end

of

text

(exceeding a line length)

, it

generates

line-full

condition.

Printing will

start and a Proportional spacing

command

will

begin

at the

start

of the next

line. If

several

kinds of proportional spacing

commands

in

succession

at the

end of text are used,

and if the

row

of proportional spacing

commands

cause

a

line-full

condition

,

only the

last

proportional spacing command

is

set at

the head of

the

next

line.

Delete

lines

10 through

90 of your

sample

program before going

on.

26

Send

CHR$(

):

To

Insert

This

Much:

27

01

1 Dot

Space

27

02

2 Dot

Spaces

27

03

3 Dot

Spaces

27

04

4

Dot Spaces

27

05

5

Dot

Spaces

27 06

6 Dot

Spaces

27

07

7

Dot

Spaces

27

08

8 Dot

Spaces

27

09

9

Dot

Spaces

Table

7

Wrap-

Around

The

DMP-200

is a

dot-addressable

printer.

Therefore

line length

is not

determined

by the

number

of

characters,

but by

the

number

of

dots per

line.

The number

of

addressable

dots-per-line

in

Data

Processing

or Word

Processing

Mode are:

•

Normal

=

960

•

Compressed =1152

•

Condensed

=

1600

•

Proportional

=

1600

•

Correspondence

Quality

=

1600

If

the length

of

text the

Printer

receives

exceeds

the

limit of

dots-per-line

, a Line Feed is

inserted

and

the

last

character

is

printed

from

the start of

the

next

line. This is called

44

wrap-around".

If you

print

two

or more

different

pitches on the

same

line,

calculation

of

the line length can

be

somewhat

complicated.

Proportional

dot

spacing can

be used to

adjust

for

the

different

densities.

Elongated

Characters

Any

of

the

character

font

styles

can

be elongated to twice

their

normal width.

The

start

(27

14)

and

end

(27

15)

elongated

characters may

be entered

any number of

times

within

a line

and

can be

used

in

every

mode.

You

can

easily

elongate

the characters

in the current

program.

Change:

100

LPRINT

CHR$(27)

»CHR$(14)

230

LPRINT

CHR$(27)

?CHR$(

19)

;CHR$(27)

iCHR$(15)

: STOP

and

RUN the

program.

27

Bold

Characters

Bold

characters

are

implemented

in

much

the

same

way

as

Elongated

characters.

When

a

(27

31)

code

sequence

is

received,

the

DMP-200

prints

the

current

buffer

contents,

then

resumes

Bold

character

printing

from

next

character

received.

Bold

characters

can

be

added

to

the

current

program

by changing

lines:

100

LPRINTCHR$(27)

5CHR$(3i)

230

LPRINT

CHR$(27)

5CHR$(13)

!CHR$(27)

>CHR$(32)

:

STOP

andRUNningit.

Bold

character

printing

may

be

stopped

by

sending

a

(27

32)

code

sequence.

Mixing

Bold

and

Elongated

Bold

and

Elongated

characters

cannot

be

active

at

the same

time. The

first

code (either

Bold

or

Elongated)

to

be

received

and

activated

will

take

precedence.

The DMP-200

then

simply

ignores

the

second

code.

28

5/

General

Control

Codes

Line

Feed

Codes

(LF)

When

a

LF

code

(ASCII

10)

is

received

by

the

DMP-200,

all data in

the Printer

buffer

is

printed

followed

by a

Line

Feed.

Unless

you

tell

it

otherwise,

the DMP-200

uses

1/6"

forward

Line

Feed

when

advancing

paper.

The Print Head

stays

in

the

current

print column

and

moves

down

one line.

Other

Line

Feed

codes

control

the pitch and direction of the Line Feed.

In

DP Mode, these

codes

may be

stored

in the buffer. In WP

Mode, they cause immediate printing.

Pitch

and

direction

settings are

sent

to the

DMP-200

in a

two

code sequence. First, a Control

Code

27

is sent

(CHRS(27)). This tells

the

DMP-200

that

a

special code

sequence

will

follow.

The next

number

determines

the specific pitch and direction. These Control

Codes

are listed in

Appendix

A.

Hints

and Tips

On

Line

Feed

, . .

•

In

Data Processing

Mode,

codes are

stored

in the Printer

buffer.

They are not

activated

until a

LF code is sent.

In the

Word

Processing mode, these sequences cause the Printer

to print the

information

in its buffer,

then

execute a Line Feed with the specified

pitch

and

direction.

•

CHRS(27);CHRS(

10)

will

not

work

from BASIC with the

CHRS

function. The LF code

(

10)

is

intercepted

by BASIC and

sent to

the

printer as a 13.

•

CHRS(27);CHRS(54)

is ignored in

Word

Processing

Mode since

it

duplicates

the LF

code.

•

Line Feed

pitch

and direction codes

have

no effect in Graphics

Mode.

The

Line

Feed is

set to

7/72"

forward.

•

Reverse

Line

Feed is

intended for

word

or

Data Processing,

not Graphics.

Special

Line

Feed

Control

Codes

There

are

two

special

forward

Line

Feed

codes

that

operate

the

same

regardless

of

the

current

print

mode.

They

are:

Special

Line

Feed

Control

Codes

Send

CHRS(

):

To:

27

50

1/12 Forward

Line

Feed

(1/72")

Table 8

This

is

unique

for

two

reasons:

• This

causes

an

immediate

dump

of

the

Printer buffer,

followed

by a

Line

Feed regardless

of

the

print

mode.

•

A

Carriage

Return

is not

performed

regardless

of the

setting

of

1 of the DIP

switch.

29

This

special

Line

Feed

Code

is

useful

for

adjusting

a

print

line

or

printing

a

dot-matrix

picture.

Carriage

Return

(CR)

A

CR

Code

(

1

3

or

1 4

1

)

tells

the

printer

to

print

the

current

buffer

contents

then

perform

a

Carriage

Return.

If

position

1

of the

DIP

switch

is

OFF,

a

Line Feed

will

be

performed

with

a

Carriage

Return.

If

position

1 isCW,

only

a Carriage

Return

will

occur.

Backspace

(BS)

The

DMP-200

can

be

backspaced

from

one

to

255

dot-coiumns

with

when

you

send

it

a two

code

sequence

of

which

the

first

code

is

CHRS(8).

The

second

code

is

in the

form

of

CURS(n)

where

n

is a

value

from

1

to

255

and

specifies

how

many

dot-columns

to

backspace

from

the

current

Print

Head

position.

For

example:

LPRINT

CHR$(S)

5CHR$<

150)

would

backspace

the

Print

Head

150

dot-columns

from

the

current

position.

In

general,

backspacing

should

be

done

in

multiples

of

the

current

character

size.

That

is,

backspacing

for

the

S

tandard

character

set

should

be 1 2

dots

per

character

(9

dots

plus

3

for

spacing

between

characters).

For

instance,

LPRINT

CHR$(8)

?CHR$<24)

would

backspace

two

characters.

If n

is

0,

backspacing

is

not

done.

The

repeat

feature

can

be used

to

backspace

more

than

255

dot-spaces.

If*

is

greater

than

the

current

dot-position,

printing

starts

at the

beginning

of

the

line.

In

Graphics

Mode,

the

backspace

code

is

ignored

and

n is

treated

as

an

independent

character

Backspace

works

in

both

Data

and

Word

Processing

Modes.

The

backspace

command

is

a

print

command.

Receiving

the

backspace

command

causes

the

DMP-200

to

print

out

all

data

in the

buffer

and

to

execute

a

backspace

operation.

Type

in

this

program:

10 LPRINT

TAB<30)5"D

P

2

0"!

20

LPRINT

CHR$(S)

5CHR$(72)

;

i,

M

-

0"

and

RUN

it.

Go

ahead

and

run

it

again.

This

time

watch

the

action

of

the

Print

Head.

The

first

string

starts

at

Position

30.

The

trailing

semicolon

holds

the

position

right

after

the

zero.

CHRS(8);CHR$(72);

backspaces

six

normal

character

widths

(12

dots

each,

remember

9

)

to

place

the

M

right

between

the

D

and

P.

You

can

imagine

what

would

happen

if the

dot

distance

is

miscalculated?

Ouch.

To

backspace

over

elongated

characters,

simply

double

the

number

of

dots.

Let's try

it.

Change

the

program

to:

10

LPRINTTAB(30>

;CHR$(27)

5CHR$(ia)

T'D

P

2

"

5

20 LPRINT

CHR$(8)

5CHR$(144)

;«M

- 0"

30

LPRINT

CHR$(27)

!CHR$(15)

and

RUN

the

program.

CHR$(27);CHRS(14)

and

CHR$(27);CHRS(

15)

g^t the

DMP-200

in

and

out of

Elongated

Character

width.

Remember

that

you

must

compensate

for

the

double-width

characters

by

doubling

the

72

in

line

20 to

144.

30

The

Proportional

Character widths

naturally vary

from

character

to

character.

The

Dots/Character

include

blank dots

between

characters.

Character

Set Width

Font

Style

Dots/Character To

Backspace

1

Character

n

Characters

Normal

10CPI

5CPI

12

24

08
08

12

24

08 12/?

08 24n

Compressed

12

CPI

6CPI

12

24

08

08

12

24

08

12/?

08 24/7

Condensed

16.7 CPI

8.3

CPI

12

24

08
08

12

24

08 12n
08 24n

Correspondence

10 CPI

Quality

20 08 20

08

20/?

5 CPI

40

08

40

08

40n

Table 9

Setting

Top-of-Form and

Form

Length

The Control Code

CHRS(27);CHRS(52) is

used to set the

Form

Length in all

three print

modes. It

resets the

Line

Feed

count to zero

and sets the current line as the

Top-of-Form

position. The line length

per

page

is set to

n(x

1/6")

to be

used

with

the Form Feed

code.

If n

is

or

1

, it is

changed

to

2. Whenever

any

Line Feed operation is

activated,

Line

Feed

pitch

is

counted

up and

compared with

n(xl/6").

On

initial power-up,

the DMP-200 sets the Top-of-Form

at

the

current

paper position

and

the Form

Length is set

to

66 lines per page . Be sure the paper is

properly positioned

before

you turn

on the Printer.

Form

Feed (FF)

When

CHR$(

1

2)

command

is

received

, the print

buffer

contents are printed out

completely

,

paper

is advanced

to the next

Top-of-Form

position

and the Line Feed counter is

reset

to

zero.

However,

there

is one slight problem

for those of you

who

communicate

to

the

Printer

through

BASIC. Most BASICs keep track of the

Top-of-Form internally

and

intercept

the

Form Feed

code on its way

to the

Printer and send out

instead

a

series

ofline

feeds

.

Since the

FF code

never

makes it to the Printer, the CHR$(

12)

is not

activated.

Some B

ASICs

can use

the POKE or

OUT

statement

to

send

a

FF

directly to the printer and

bypass

the

intercepter.

Important

Note:

Do

not use

CHR$(

1

2)

except for graphic applications . Radio

Shack

application

programs have

Top-of-Form

"built-in."

See your

applications

program

user's

guide for instructions

on

setting

FORMS

and

the program

will

do the

rest.

Ignored

or

Undefined

Codes

Codes

that are

unusable or undefined

in a

given print mode

are

either

ignored or

printed

with

the

symbolXwhich represents an

invalid

code.

31

There

are

several

reasons

a

code

may

be

unusable

in

a

certain

mode.

Redundant

codes

that

r?»w

C

T°

8e

the

CUrrent

printer

status

m

usuall

y

ignored.

For

example,

if

the

Printer

is

in

DP

Mode

,

sending

a

CHRS(

1

9)

(used

to

enter

DP

Mode)

is

useless

. And

there

are

many

AiCT

control

codes

m

the

range

to

3

1

that

the

DMP-200

simply

doesn't

recoenize.

ASCII

U,

torexample,

is

not

used

in

any

of

the

threeprint

modes.

DMP-200

Buffer

Operation

The

DMP-200's

ability

to

temporarily

store

data

is one

of its

main

advantages

over

a

typewriter.

Codes

sent

to a

typewriter

(i.e.

,

keys

pressed)

are

transferred

immediately

to

the

paper.

Codes

sent

to

a

Printer

are

not

printed

immediately;

they

are

stored

in

a

separate

sectionof

memory

in

the

Printer

called

the

buffer.

When

the

buffer

fills,

or

certain

codes

are

received

(e.g.

,

LF

or

CR),

the

buffer

is

emptied

and

all

data

is

printed

on

the

paper.

What

happens

after

the

buffer

data

is

printed

depends

on

the

circumstances.

In

some

cases

printing

continues

on

the

same

line;

in

others,

the

Print

Head

is

moved

to

a

different

position

relative

to

the

paper.

In

the

DP

Mode,

commands

for

changing

print

fonts,

Line

Feed,

etc.

, can

be

stored

in

the

butter

to

take

affect

when

the

data

is

dumped

to

paper.

Understanding

how

the

buffer

works

is

important

for

those

who

wish

to

gain

full

control

of

the

DMP-200.'

Hints

and

Tips

on

the

DMP-200

Buffer.

. .

For

DP,

WP,

and

Graphic

Modes

•

The

buffer

allocates

a fixed

number

of

dots

depending

on

the

character

width

selected

The

buffer

is

emptied

when

the

data

stored

equals

that

number.

Printing

resumes

at

the

start

of

the

next

line

unless

Switch

#

1

is

set

to

CR

only.

If

different

character

widths

have

been

used

on

the

same

line,

the

last

character

added

may

exceed

the

dot

count.

The

buffer

is

printed

without

this

last

character

•

The

last

character

received

by

the

buffer

is

printed

at

the

start

of

the

next

print

line

following

an

automatic

Line

Feed

and

Carriage

Return.

•

The

Form

Feed

code

(FF

=

1

2

decimal)

automatically

activates

printing

(if the

code

makes

it to

the

Printer).

The

buffer

is

printed

and

the

print

head

moves

to

the

next

Top-of-

Form

line

without

a

carriage

return

to

the

start

of

the

line.

•

The

Carriage

Return

code

(CR

=

13

decimal)

automatically

activates

printing

(assuming

at

least

one

character

code

is

already

in

the

buffer).

If

Carrige

Return

only

has

been

selected

via

hardware,

the

Print

Head

is

moved

to

the

start

of the

current

line

and

the

next

buffer

full

will

over

print

the

current

line.

Otherwise

subsequent

characters

will

be

printed

at the

start

of the

next

print line.

•

The

Line

Feed

code

(LF=

10)

automatically

activates

printing.

The

buffer

is

printed

and

the

Print

Head

moves

to

the

next

print

line

without

a

carriage

return

to

the start of

the

line.

•

If the

computer

delays

more

than

a

second

before

sending

the

next

print

code,

the

buffer

is

pnnted.Printing

continues

from

the

current

position.

•

The

Head

Positioning

sequence

(27 1 6 n

i nl)

prints

the

buffer.

Printing

continues

in

the

current

line

at

the

dot

address

specified

by

the

(27

1

6)

command.

Data

and

Word

Processing

Modes

only:

•

The

backspace

command

activates

printing.

Printing

continues

in the

current

line

at the

dot

address

specified

by

the

command.

•

If a

character

set of

different

dot

density

is

selected,

the

data

in the

buffer

is

printed.

Codes for

changing

character

sets

are:

(27

17),

(27

18),

(27

19),

(27

20),

and

(27

23).

Printing

continues

in the

current

line

with

the

new

character

style.

32

•

Dot graphics printing continues

from the

current

character

position.

•

When a start

Bold

or end Bold is received, the buffer is

printed.

•

Bold

printing

continues from the current character

position.

Graphic Mode only:

•

When the end

Graphic

Mode

is

received,

the

Printer returns

to the

previous print

mode

and printing

continues in

the

same line

from the current print position.

Note 1: In the description, "next line" means

the

new

line

performed

by

Line

Feed

operation. In Data Processing Mode, if a

Reverse Line

Feed

has been set in thQ

memory,

the line

feed operation

will

cause paperto

move

in the

reverse

direction.

Note 2: Repeat data can cause a

buffer full or

overflow

condition

as

well

as

single

characters.

33

6/ Word

and

Data

Processing

Modes

Superscript

and

Subscript

In

an

earlier

section,

we

described

that

the

difference

between

Data

and

Word

Processing

Modes

is how

they

handle

Line

Feed

codes.

(In Data

Processing

Mode,

LF codes are

stored

until

the

end

of the

line

and

become

the

current

line

feed

standard; in

Word

Processing

Mode, these

codes

are

executed

immediately

and are only

temporary.)

Printing

superscripts

and

subscripts

is the

ideal time to

take

advantage

ofthe

immediate

response

to Line

Feed

codes

in Word

Processing

Mode.

Type in this new

program:

Note:

For

smooth

Reverse

Line

Feeds,

be sure the

Paper

Release

Lever

is to the front of

the

Printer

(e.g.,

Platen

pressure

is

off),

and keep

the

paper

bail

lever

on the paper.

10

E$=CHR$(27)

'ESC

20

D$=CHR$(28)

'DOWN

30

U$=CHR$(30)

'UP

40

LPRINT

CHR$(20)

50

REM

G0

LPRINT

"(X"

;

110

lprint

e$

D$;

,,

r

i

;e$ u$;

n

+

x

120

LPRINT

e$ d$;

m

2"

;e* U*3"

)

"

5

130

LPRINT

E$ u$;

m

2"

;e$ D$

and RUN

the

program.

In this

program,

frequently

used codes

are

stored

in

variables

E$,

DS, and

US.

This shortens

the

program

a bit.

The

directions

in line

10 through 30

refer

to the

motion

you

would

make

drawing

the

script

characters

by

hand (move

down

to do

the subscripts

1 and

2,

then back

up

to the

output

line).

Then

move

uptodo

the

superscript

2.

Repeat

Printing

The

DMP-200

also

provides

a

built-in

repeat

capability.

You

can use it to repeat

a single

character

code

up

to

255

times.

It's great

for

repeating

graphics codes,

underlining,

repeated

block

graphics,

etc.

The

Repeat

feature

uses a three

code

sequence:

•

CHR$(28)

•

The

number

of

repetitions.

•

The code

to

be repeated.

Since

we

already

have

CHRS(28)

saved

as

D$ in the current

program,

let's try out the

repeat

sequence.

Change;

50 LPRINT

«

/«;

'2

BLANK

SPACES

BEFORE

THE /

S0

LPRINT

e$; u$;

70 LPRINT

D$5

CHR*<13);

CHR$<241)

Code

24

1

is from

the

Graphics

character

set.

80

LPRINT

"

"5 '1

BLANK

SPACE

90

LPRINT

CHR$(S)i

CHR$(7)i

100

LPRINT

CHR$<92>

?

"

/

(

X

"

i

and

RUN

it.

With

a little

fancy

footwork,

you were

able

to line up the

two

slashes

and

came up

with

a

rough

approximation

of

a

square

root sign. Brings

back bad

memories,

doesn't it?

35

Underline

Printing

If you

need to

underline any

text

in

either DP or

WP

Mode,

send

the

DMP-200

a CHRS(15).

All text that

follows this

code

will be

underlined

until

you

send

a CHR5(

14)

which

stops

underlining.

For

example, type

in

this short

program:

10

LPRINT

CHR$(20)5

:REM

WORD

PROCESSING

20

LPRINT CHR$<15)5

:REM

START

UNDERLINE

30

LPRINT

"LEEWAY

BUSINESS

PRODUCTS"

40 LPRINT

CHR$(14);

:REM STOP

UNDERLINE

50

LPRINT "GIVES

GOOD

SERVICE"

In

this example,

line 20 turns on

the underline

and

the first line

of

text

(LEEWAY

BUSINESS

PRODUCTS) is

underlined.

Line

40 turns

the

underline

off

and GIVES

GOOD

SERVICE

is

not underlined.

Print

Head

Positioning

In

any

Mode,

you

can position the

Print

Head to

a specific

dot

position.

Every

other Print

Head position is

accessible through

the

positioning

sequence.

The

characters

stored in ROM

can use the

half

step

positions

—

you

can't.

Using the

Normal

character sets

(

10

CPI), there

are 960

dot

positions

per

line, but

only

half

(480)

are accessible by

you.

The

same

is

true for

Compressed

and

Condensed

characters.

Elongated

characters use the same dot

columns

although

the

characters

are

printed

twice

as

wide.

To position

the Print

Head to

a specific position,

send

a

(27

16),

then

two

numbers

(we'll

call them n 1

and

/z2) that specify the

desired

position.

In

other

words,

just

follow this

general

procedure:

1

.

Send a

Control

Code

which

specifies

the

Character set

(Normal,

Condensed,

Compressed).

2. Send a

CHR$(27);CHR$(16)

to tell the

Printer you

want to

position

the

Print

Head to

print

a

specific

dot-column.

3

.

Tell the

Printer

which dot-column

you

want to print.

This is a

little

more complicated and

will

be

explained shortly.

For

now,

just

understand

that you

simply

tell

the Printer

which dot-column

you

want.

4. Tell the

Printer

what

you

want to print.

When

you

want to

specify

a

dot-column for

printing to

begin,

you

must

first

use CHRS

to

sendthe(27

16)

code.

Follow this

with

another

two-code

sequence

which

specifies

the

position.

For

instance:

LPRINT

CHR$(27);CHR$(16);CHRS(n1);CHRS(n2)

where n

1

is a

value between

0-3

and nl is a value

between

0-255

if n

1

is

between

0-2

.

If n

1

is

3,

then

nl

can't be greater

than 3

1

.

Remember!

Normal printing

allows

you to

access

dot-columns

up

to

479

(nl

=

l,n2

=

223);

Compressed

printing

allows you

to

access

dot-columns

up to 575

(nl

=

2,«2

=

63);

Condensed printing

allows

you to access

up

to 799

(nl

=

3,/z2

=

31).

Why

two numbers (n 1

and

nl)l The

maximum

value

you can

send

to

the

DMP-200

with

one

number

is 255,

and

clearly

you

have

more than 255

dot

positions

available.

36

Those

of

you who

are

fans

ofbinary

math

will recognize

that

the DMP-200

is interpreting

these two

numbers

as

a single

10-bit (b(0)

-b(9))

value.

The two

lower

bits of nl are

usedas

b(8)andb(9).

Note:

Use

10"

wide

paper

for

this

next

example.

See

if

you

can

print

a

character

starting

in position

480 in Normal

density.

Type:

10

LPRINT

CHR$<27)

;CHR*<16)

iCHR*(i)

5CHR*<224)

j"*"

and

RUN the

program.

Whoops

!

The

asterisk

printed

at the

left edge

ofthe paper.

Hmmm? Maybe

you

need to

leave

enough

room

for

the

asterisk to

fit on the end

of

the

line . Try:

10

LPRINT

CHR$(27>

;CHR$(

IB)

?CHR$( 1) ;CHR$(218)

r'*"

and

RUN.

That's

better.

It

fits nicely

at the end

of the

line.

Try this program

with

the

different

character

densities.

Position

is a

little

like a

TAB

,

but it gets

right down

to the dot level,

giving

you

much

finer

control.

Although

it

is

available

in all

three

print modes, its

potential

is greatest

in Graphic

Mode.

If

you want

to make

a

real

mess

on you

paper,

try:

jH0 LPRINT

CHR$(27)

5CHR$(2S)

5

^20

FOR

1

=

1

TO 100

30

LPRINT

CHR$<27)

5CHR$UG)

5CHR$<1)

5CHR$<150+I*SINCI/5)

)

5

40

LPRINT

M

*"

50

NEXT

I

and

RUN the

program.

But

get out

of

double-width

first!

37

7/

Graphics

Mode

In

Graphics Mode,

you no

longer

have

pre-defined

characters

at

your disposal.

You

are

responsible for the

positioning

and the

action

of

the

Print

Head.

The DMP-200

allows you

to

have direct,

programmable

control

over

all of

the

available

graphic dots.

How

many

"across the paper"

addressable

dot-columns

are there?

That

varies

depending

on the

Character

styles

you're using.

How many "up

and down'

'

(dot-columns)

addressable

dots are

there? The

answer is 7.

That means you can

specify any

one of up to 5,600

individual

dots

(7

x 800

=

5600)

in

Condensed or

Proportional

mode.

How do

you

print just one (or

two

or three)

of

those

dots

in

the

dot-column

you

want? (For

example,

how can

you

print the 3rd dot

from

the top

in

the

400th

dot-column?)

Simple. Just

follow this

general

procedure:

1

.

Send

a

Control

Code

which

specifies

the

Character

set

(Normal,

Condensed,

Compressed).

2. Send a CHRS(

1

8)

to

put

the DMP-200 into

Graphics

Mode.

3

.

Send a CHR$(27)

;CHR$(

1

6)

to tell the

Printer you

want to

position

the Print

Head to

print a specific dot.

4. Tell the Printer

which

dot-column

you want to

print.

This is a

little more

complicated

and

will

be

explained

shortly. For

now, just

understand

that you

simply tell the Printer

which

dot-column you

want.

5.

Tell the

Printer what you

want to

print.

You

can do this

a

number of

ways.

Again,

this

will

be

explained in

more

detail

shortly.

For

now,

just keep

this

overall

procedure

in

mind.

When

you

want

to

specify

a dot-column

for

printing to

begin,

you must

first

use CHRS

to

send the

(27

16)

code.

Follow this

with

another

two-code

sequence

which specifies

the

position. For

instance:

LPRINTCHR$(27);CHR$(16);CHR$(n1);CHR$(n2)

where nX

is a

value

between

0-3

and nl

is a

value

between

0-255

if

n\

is

between

0-2. If

nl is

3

, then nl can't

be

greater

than

3 1

.

Remember!

Normal

graphic

printing

allows

you to

access

dot-columns

up to 479

(n

1

=

1

,

nl

=

223);

Compressed

graphic

printing

allows

you

to

access dot-columns up

to

575

(nl

=

2,/i2

=

63);

Condensed

graphic

printing

allows

you

to

access up to

799

(nl

-

3,/i2

=

31).

Even

though dot-columns

greater

than

255

exist,

you

cannot

send

values

greater

than

255

.

That is ,

CHR$(400) is

not

allowed

—

you

must break

it into

a two-byte

value.

For

instance, to draw a vertical bar

at

dot-column

144 in

Condensed mode, try

this

program:

10 LPRINT

CHR$(

18)

20 LPRINT CHR*(27)

iCHR$(1G)

iCHR$(0)

iCHR*U44)

;CHR$<255)

Note:

Model I

users must use

POKE 14312,0

(Don't

worry,

that last CHR$(255)

will

be

discussed

shortly.)

In line

10,

CHR$( 1

8)

puts the Printer into

Graphics

Mode and

CHRS(27);CHRS(

1

6)

(line

20)

tells it to

get

ready to position the Print

Head.

(Note

that CHRS(0) is

not

necessary.)

39

Try this line to

print

a

vertical

bar at the right-most

available dot-column

—

799.

10

LPRINT CHR$(27)

tCHR$(20) ;CHR$(18)

;CHR$(27) !CHR$(ie)

;

CHR$<3)

;CHR$(31)

>CHR$(255) ;

20 LPRINT

CHR$(30)

What

happens

is:

•

CHRS(27);CHRS(20)

puts the DMP-200 into Condensed character set.

•

CHRS(18)putsthePrinterintoGraphicsMode.

•

CHRS(27);CHRS(16)

tells

the

DMP-200 to get

ready

to position the Print Head.

•

CHRS(3) tells

the Printer the position.

•

CHRS(31) specifies the

last

available

dot-column.

(Note: If you used

CHRS(32) in

this line instead ofCHRS(3

1),

the DMP-200 would

4

*

wrap-around"

to the

first dot-column

in the next line.)

Printing

Graphics

Patterns

By

now,

you should be adept

at positioning

the

Print Head. But

you

also

need

to be

able

to

tell the

DMP-200

what

to print

once

the Head is positioned.

Remember

that we

said

there were

7 vertical dots in dot-column.

You can

print

any or all

of

these

dots

in any

combination

you want.

Look

back

at the sample

programs used when

we

talked

about Print

Head positioning. Do

you

remember

the last part

of

the program line

(CHRS(255)) which

always printed a vertical

bar?

That's an example

of

all 7

dots being printed at once.

Try

printingjust the

top dot

of

that

last dot-column

(799):

10 LPRINT CHR$(27)

;CHR$(20)

iCHR$( 18) »CHR$(27)

?CHR$( 16)

;

CHR$(3)

!CHR$(31)

iCHR$<129>

;

How

does the

CHRS( 1

29)

printjust

the

top dot?

Even

though the

7 dots

in a dot-column

are in a

vertical

row, they are not

numbered

sequentially down

from

1 to 7.

For

instance, you've

already

seen how to print the top dot in the column, but to

print

the

bottom

dot,

change

the

program line

to:

10

LPRINT CHR$(27)

!CHR$(20) !CHR$( 18)

;CHR$(27)

;CHR$( IS) ;

CHR$(3)

5CHR$(31)

!CHR$(i92)

5

This is

fine if you

want

to print

an

individual

dot, but

how

do you print a

combination of

dots?

It's

actually

quite

simple

too.

1

.

Specify

the

Dot

#(1-64)

that

represent

the individual dots you

want to print.

2. Add those

individual

Dot

#'s together.

3.

Add the sum of the

combined

Dot

#*s to 128.

For

example

,

if you

want

to print the

first

dot

(Dot

#

1

) the fourth dot (Dot

#

8)

,

and the last

dot

(Dot

#64),

add them

together:

1

4-

8

+

64

=

73. Then add the sum

(73)

to 128:73 +

128

=

201.Use201astheaddressabledotpatteraintheformCHRS(201):

10

LPRINT

CHR$(27)

5CHR$(20) iCHR$(18)

5CHR$(27) ;CHR$( IB)

?

CHR$(3) 5CHR$(31)

5CHR$(201)

5

40

Remember

how CHRS(255)

printed a

solid

(all dots

printed)

vertical

bar.

Try

out

the

formula

on

that:

(1

+

2

+ 4

+

8

+ 16

4-

32

4-

64)

=

127

+

128

=

255

The

following

sample

program

line

will print

a

box

with a

line

through

the

middle:

10

LPRINT

CHR$<27)

5CHR$<20)

5CHR$(18)

iCHR$(Z7)

SCHR*(1S)

i

CHR$(1)

;CHR$(30)

;CHR$(255)

;CHR*<201>

5CHR$(201)

?CHR$(201)

?

CHR$<201)

5CHR$(255)

?

Now to

flex

our

muscles

.

Type

in this

NEW

program:

10

LPRINT

CHR$(

18)

20

S=l

:

N=128

30 FOR

1=1

TO

20:

S=-S

40

FOR J=0

TO

S

80

IF

S<0

THEN

N=N+2

A

(6-J)

ELSE

N^N-2

A

J

90

LPRINT

CHR$(N)

!

100

NEXT

J:

NEXT I

120

LPRINT

CHR$<30>

and

RUN.

Be

prepared

for a

pause; it

takes

time to

fill

the

print

buffer.

This

program

alternately

adds

and

subtracts

powers

of

two

to

the

current

code

pattern

stored

in

the

variable N.

The

net

effect

is

to

add or

remove

a

single

dot

from

the

preceding

dot

pattern.

Line

Feed

In

Graphics

Mode,

it is

assumed

that

you

want to

print

rows

of

graphics

one

right

after

another,

each

7 dots

high.

Therefore,

Graphics

Mode

provides

only

one line

feed.

A

single

line

feed

advances

the

paper 7 dots or

approximately

0.

1

inch. This

small

paper

advance

allows

for

continuous

printing

without

unwanted

space

between

lines.

Modify the

current

program

to

demonstrate

this

fixed

line

feed.

Add or

change:

20 FOR

K=l

TO

2:

S=l :

N=128

50 IF

K=l

THEN80

80 IF S<0

THEN

N=N+2

A

J

ELSE

N=N-2

A

(S-J)

70 GOTO

90

110

LPRINT:

NEXT

K

and RUN.

These lines infiltrate

the

current

loop and

produce

a

mirror

image

of the

first

pass

of

the

Print

Head.

The LPRINT in

line

1 10

causes

the

Line

Feed

between

passes.

Note:

Reverse

Line

Feeds are

not

intended

for

graphics

printing.

Deterioration

of

dot

resolution

may occur

if

you

attempt

reverse

Line

Feeds.

Repeat

Function

CHRS(28)

will tell the DMP-200 to

repeat a

graphic

pattern a specified

number

of

times.

The

format for

the Repeat Function

is;

repeat code

-f

number

of

times

to

repeat

+

what to

repeat

For

instance, LPRINT

CHR$(28);CHR$(

15);CHRS(255)

will

print the

solid

vertical

bar 15

times.

41

Change

line

90 to:

90

LPRINT

CHR$(28)

;CHR$(2)

5CHR$(N)

!

and

RUN.

Or

run this program:

10

LPRINT

CHR$(18)

5

20

LPRINT

CHR$(28)

?CHR$(50) ;CHR$(135) i

Print

Density

Horizontal

dot

density in

Graphics

Mode is the same

as

that of the character width

prior to

entering

Graphics

Mode. Add

to

the

current

sample program:

5

LPRINT

CHR$(27) ;CHR$<20)

^'CONDENSED CHARACTER WIDTH";

and

RUN

Line

5 activates the Condensed

character set.

Graphics are then

printed

in

Condensed

character

density.

Leaving

Graphic

Mode

CHRS(30)

is used

to exit

Graphics Mode. It places the

DMP-200 in the same mode (DP

or

WP)

the

Printer

was

in when

it entered

Graphics

Mode.

In addition, all the

previous

conditions,

such

as

underline

and

character

style,

are

restored. Change the sample program

to:

30

LPRINT CHR$(N)

?

130

LPRINT

"STILL

IN CONDENSED

MODE"

140

LPRINT

CHR$(27)

;CHR$(1S)

and

RUN.

Sure

enough,

the

Condensed

mode

is still alive and

well.

Mixing

Modes

on

the Same Line

The

fact

that character

density

is unaffected

as

the DMP-200

moves

in

and out of

Graphics

Mode

is a blessing when

mixing

Text and Graphics on the

same

line.

It simplifies the

calculation

of the number

of dots per line

.

Free

Hand

Drawings

Having

high

resolution

graphics at your

disposal

is

great, but

you

must realize

that it

requires

plenty

of

data.

The

Computer

can do most

of

the work

in

drawing figures that

can

be

described

by a mathematical

function.

Free

hand drawings,

on the other hand, require

translating

the figure into a

matrix

of

dots,

then calculating

the dot printing

combinations

for

each

Print

Head position.

Since

there are 7 dots

available

for graphics, separate the

matrix

into

rows

7 dots high.

42

The

numbers

can be

stored

in

DATA

statements

. To

conserve

memory

and

typing

time

,

store

the

data as

numbers

from

to 127,

then

add

128

as

you

send

them

to

the

Printer.

Enter

these

sample DATA

lines

:

NEW

CENTER)

120

DATA

995

180 DATA

19

#12

#112*999

150

DATA 40

,39*18

#16

#8 #15

,999

210

DATA

IB

>1S

#8

#8

#4 ,4

,2 #2

#1 »1

*999

The

999's will be

used

to signify

the

end of a

line.

The

other

numbers

are

between

and

127.

Now

for the

program to

read

the

numbers ,

add 128

,

then

send

them

to the

Printer

10

LPRINT

CHR$(

18)

20 FOR

R=l

TO

4

30

READ

N:

IF N

=

999

THEN

80

40 LPRINT

CHR$(

129+N)

5

:

GOTO

30

80

LPRINT:

NEXT

R

90

LPRINT

CHR$(30)

100

LPRINT

"DMP

200"

and RUN.

Not

much to

brag

about

yet.

Maybe

what it

needs

is

to be

jazzed

up to

repeat

a

number

several

times.

A

good

approach is

to

use

negative

numbers

to

indicate

the

number

of

repetitions

followed by

the

number

to

be

repeated.

Add:

120

DATA

17*33*33*34,-4,88,68,-4,4,-5,8,-5,18,-5*32,

-5

,64

,999

130

DATA

64

,96

,80 ,72

,68

.68

,97

#112

,120

,124

,126

,-7

,127,

-5

,126

180 DATA

95,79,71,67,65,32,18,8,4,2,1,0,1,2,4,11,87,75

Don'tRUNyet!

Inline

120,

the

sequence

-4,66 is

used to

mean

four

66s;

66,66,66,66.

You

must

modify

the

program

to recognize

the

negative

numbers.

Change:

40 IF N>=0

THEN

LPR

I

NT

CHR$

< 12S

+

N

)

i

:

GOTO

30

50

READ

M

80 LPRINT

CHR$(28)CHR$(-N)CHR$(

128+M)

?

70 GOTO

30

and RUN.

The

figure still

doesn't

look

like

much. Add

the

remaining

DATA

lines

and

see

what

you've

been

working on.

110

DATA

-7

,0

,64 ,64

*96

tSS

*80

,80

#72 ,72

,-2

,100

,-2*114

*57

,57

140

DATA

-5*124,-2*120,-3 1

121

,-2

*

1

13

#-3

*

1 14

,98

,98,-2*100

150

DATA

-2

,116

*82,88

,72

,84

,32

,32*16

,80

,104

,72

,5*101

,51

170

DATA 1

27,

-4,

G4,

-5, 59

*-5,

7,

-5,

15,

-5,

31,

-5,

S3,

-8,

127

200 DATA

-5, 0,-5,

1,-5,

2,

-5,

4,

-5,

8,

-5, IS,

-5,

32,

-4,

84 ,127 #32

,32

and

RUN.

Now

that's worth the

effort!

43

APPENDIX

A/Control

Code

Summary

Code

Dec.

Hex

Data

Processing

Mode

Word

Processing

Mode

Graphics

Mode

Remarks

00

01

08n

00

01

08

Ignored

Backspace

(n

=

Binary)

n;

Back

Spaced

Dot

number

Ignored

Backspace

(n=

Binary)

n;

Back

Spaced

Dot

number

ignored

Ignored

Receives

n as

character

data

***

10

or

138

0A

8A

Executive

Line

Feed

(Execute

LF

in ac-

cordance

with

information

latched

Full

Line

Feed

1/6"

(Executive)

7/72"

Line

Feed

(Executive)

8Ahex,

138

dec.

12

OC

Form

Feed

Form

Feed

Form

Feed

13

or

141

0D

8D

Carriage

Return

(When

NL,

LF

pitch

is

latched

one.)

Carriage

Return

(When NL, LF

pitch

is

1/6"

per line.)

Carriage

Return

. .

.

only

0D

Hex.

(When

NL,

LF

pitch

is

7/72"

per

line.)

NLiCR,

selectable

14

0E

End

Underline

End

Underline

Ignored

15

OF

Start

Underline

Start

Underline

ignored

18

12

Select

Graphic

Mode

Select

Graphic

Mode

ignored

19

13

Ignored

Select

Data

Processing

Mode

Ignored

20

14

Select

Word

Processing

Mode

Ignored

ignored

27

01

-09

1B

01-09

Proportional

Spacing

(2nd

Byte is

dot

column

number.)

Proportional

Spacing

(2nd Byte

is

column

number.)

Ignored

27 14

1B0E

Start

Elongation

Start

Elongation

Start

Elongation

27 15

1B0F

End

Elongation

End

Elongation

End

Elongation

27,

16

1B 10

n\,n2

n1,n2

Positioning

(3

pitches

are

available.)

(n1,

n2

indicate

dot

position

from

Home

position.)

Positioning

(3

pitches

are

available.)

(n1,

n2

indicate

dot

position

from

Home

position.)

Positioning

(3

pitches

are

avaiiabie.)

(n1,

n2

indicate

dot

position

from

Home

position.)

n1,n2:

Binary

value

45

Code

Dec.

Hex. Data Processing Mode

Word

Processing

Mode

Graphics

Mode

Remarks

27 17

1B 11

Select

Proportional

character

Select

Proportional

character

Ignored

27

18

1B 12

Select Correspon-

dence

Quality

character

Select

Correspon-

dence

Quality character

Ignored

27

19

1B

13

Select Standard

character

Select Standard

character

Ignored

27

20

1B 14

Select Condensed

character

Select

Condensed

character

Ignored

27

23

1B 17

Select

Compressed

Select

Compressed

Ignored

character

character

Ignored

27 31

1B 1F Start Bold

Start

Bold

Ignored

27 32

1B

20 End

Bold

End

Bold

Ignored

27

52,

n

1B34,n

Form

Feed set

Form

Feed set

Form Feed

set

27

50

1B

32

1/12 Forward Line

1/12 Forward

Line

1/12

Forward

Line

Feed

Feed

Feed

27 10

1B 0A Set

Full

Reverse

Line

Feed

1/6"

(No

motion)

Full

Reverse

Line

Feed

1/6"

(Executive)

Ignored

27 28 1B

1C

Set

Half

Forward

Line Feed

(No

motion)

1/12"

Half

Forward

Line

Feed

(Executive)

1/12"

Ignored

27 30

1B 1E Set

Half

Reverse

Line

Feed

1/12"

(No

motion)

Half Reverse

Line

Feed

1/12"

(Executive)

Ignored

27

54

1B

36 Set

Full

Forward

Line Feed

1/6"

(No

motion)

Ignored

Ignored

27

56

1B38 Set

3/4 Forward

Line

Feed

1/8"

(No

motion)

3/4

Forward Line

Feed

1/8"

Ignored

28

n1, n2

1Cn1,n2

Repeat

Print Data Repeat

Print Data

Repeat

Print

Data

(Undefined

Code is

(Undefined

Code

is

(IF

MSB

=

0,

Data

is

changed

to

"X.")

changed

to "X.")

ignored.)

46

Code

Dec.

Hex. Data

Processing

Mode

30

1E

Ignored

127

7F

Ignored

255

FF

ignored

Other Codes

Prints

"X/' marks

in

Function

Area

(02

to

31

decimal)

(02

to

1

F

hex.)

Other

Codes

Prints

"X."

marks

Word

Processing

Mode

Graphics

Mode

Remarks

Ignored

Ignored

Ignored

Prints

"X."

marks

End

Graphic

Mode

Ignored

(Printing

Data)

Ignored

Prints "X."

marks

(Printing

Data)

in

Function

Area

(128

to

159

decimal'

(80

to

9F

hex.)

47

Appendix

B/Character

Sets

The

DMP-200 has

339 dot

matrix

patterns

in the

ROM

(Read

Oniy

Memory).

The

following

is a

table of

the

character

codes.

The

printable

characters

may be

classified as

follows.

•

Proportion or \

Proportional Elongated I

ASCII

94

•

Correspondence

Quality or

J

European

Symbol

32

Correspondence

Quality Elongated

J

•

Condensed

or

\

Condensed

Elongated I

ASCII

94

•

Compressed

or I

European

Symbol

25

Selectable

Compressed

Elongated

j

Japanese

Kana

64

•

Standard or

I

Block

Graphic

30

Standard

Elongated

94 ASCI!

Code

ASCII

Character

Sets

Code

Char.

Code

Char.

Code

Char.

Dec.

Hex

|

Oct. Dec.

Hex Oct.

Dec.

Hex

Oct.

32 20

40

(Space)

64

40

100

@

96

|

60

140

N>

33

21

41

t

65

41 101

A

97

61

141 a

34

22

42

»

66

42 102

B

98

62

142 b

35

23

43

#

67

43

103 C

99 63

143

c

36

24

44

$

68

44

104 D

100

64

144

d

37 25

45

%

69

45

105

E

101 65

145 e

38 26

46

&

70

46

106

F

102

66

146 f

39

27

47

•

71

47

107 G

103

67

147

9

40 28 50

(

72 48 110

H

104 68

150

h

41 29 51

(

73

49

,111

I

105

69

151

i

42

2A 52

*

74 4A

112

J

106

6A 152

i

43

2B 53

+

75

4B

113

K

107 6B

153

k

44

2C

54

f

76

4C

114 L

108

6C

154

I

45 2D 55

—

77

4D 115

M

109

6D

155

m

46 2E 56

78

4E

116 N

110 6E

156

n

47 2F

57

/ 79

4F

117

O

111

6F

157

48 30

60

80

50

120

P

112 70

160

P

49

31

61

1

81

51

121 Q

113

71

161

q

50

32

62

2

82

52

122 R

114 72

162

r

51

33

63

3

83

53

123 S

115

73

163

s

52

34 64

4

84

54

124

T

116 74

164

t*

53 35

65 5

85 55

125 U

117

75

165

u

54

36

66

6

86 56

126

V

118 76

166 V

55 37

67

7

87

57

127

w

119

77

167

w

56 38

70

8 88

58

130

X

120

78

170 X

57

39

71

9

89 59

131 Y

121 79

171

y

58

3A 72 : 90

5A 132

z

122

7A

172 2

59

3B 73

j

91

5B

133

[

123

7B 173

{

60 3C

74

<

92

5C

134

/

124 7C

174

i

1

61 3D

75

=

93

5D 135

]

125

7D

175

"}

62 3E

76

>

94

5E

136

A

126

7E

176

~

63

3F

77

? 95

5F

137

—

Note:

Following

characters

are

descended

by

one

dots.

Small Letter;

g.p.q.y.j,

(Underline)

49

32

European

Symbol Code

Standard,

Compressed or Condensed

Character

Set

Proportional

Correspondence

Quality

Character

Set

Code Char.

Dec.

Hex

Oct.

160

A0 240 (Blank)

161

A1 241

a

162

A2 242

9

163 A3

243 £

164

A4 244

(Blank)

165

A5

245

^

166

A6 246

8

167

A7

247

168

A8

250

T

169 A9 251

§

170 AA

252

(Blank)

171

AB 253

©

172

AC 254

Va

173

AD

255 (Blank)

174

AE

256

1

/2

175

AF

257 f

176

BO

"260

¥

177

B1

261

A

178

B2 262

O

179

B3

263

180

B4

264

c

181

B5

265

(Blank)

182

B6

266

a

183 B7

267

6

184

B8

270

u

185

B9 271

186

BA 272

(Blank)

187

BB 273 e

188

BC

.

274 u

189

BD

275 e

190

BE

276

(Blank)

191

BF

277

/

Code

Char.

Dec. Hex Oct.

160

A0

240

161

A1

241

a

162

A2

242

9

163 A3 243 £
164 A4

244

165 A5 245

M-

166

A6

246

o

167

A7 247

T

168 A8 250

T

169

A9

251

§

170

AA

252 ®

171

AB

253

©

172 AC

254

Va

173

AD 255

3

A

174

AE 256

1

/a

175 AF 257

«T

176 B0 260 ¥

177

B1

261

A

178 B2 262

O

179

B3 263

180 B4 264

e

181

B5

265

-

182 B6 266

a

183 B7

267

6

184 B8 270 u

185

B9 271

P

186 BA 272 TM

187 BB

273

e

188 BC

274

u

189

BD

275 e

190

BE

276

191

BF

277

/

Note:

1

The

"optimizer

function"

allows the following: If a spacing code

(fixed space and/or

proportional

space) js

received,

the

carriage

moves only the

shortest

distance, and

the

action

will

take

place

without

unnecessary movement. This saves

printing

time. When

the

character

data

(SP, proportional

space

or

printable

code)

are

sent

to the

Printer within

a 1

sec.

interval,

the

Printer automatically

stores them until:

(1)

Function

codes

are sent

(2)

when

the interval

is

greater than 1

sec. The

printing

is then

executed.

(See page

22).

If

a

blank

code (in the left table)

is

received

under

Standard,

Elite or

Condensed

character

set

condition,

the

carriage

will

move

in the

same

manner

as

when

receiving

a

printable

character.

When printing,

the

use of blank

code can be

very

convenient,

and produce

attractive/useful

printouts.

2

The

number

of dots

comprising

the following

characters are

reduced

by

one

dot.

50

30

Block

Graphic

Code

Standard,

Compressed

or

Condensed

Code

Char.

Code |

Char.

Dec.

Hex

Oct.

Dec.

Hex

|

Oct.

|

224

E0

340

(Blank)

240

F0

|

360

j

r

225 E1

341

241

F1

361

I

—

226

E2

342

242 F2

|

362

n

227

E3

343

243

F3

363

T

228 E4

344

m

244

F4

364

h

229

E5

345

S

245

F5

365

i

230

E6

346

w

246

F6

366

—

231

E7

347

"

247

F7

367

J

232

E8

250

BB

248

F8

370

JL

233

E9

351

1

249

F9

371

H

234

EA

352

3

250

FA

372

+

235

EB

353

r

251

FB 373

r

236

EC

354

a

252

FC

374

A

237

ED

355

g.

253

FD

375

^

238

EE

356

j

254

FE

376

^

239

EF

357

1 m

Note:

1

When

Proportional

or

Correspondence

Quality

character

set

condition

is

selected,

these

characters

will

be

changed

to

"X"

mark

(invalid

code).

2

These

characters

are

composed

of

six

vertical

dots.

When

using

these

codes

to

prepare

diagrams,

Line

Feed

should be

set

to

"half

line

in

forward."

If

other

paper

feed

pitch

is

used,

the

diagram

will not be

accurate.

51

Proportional

or

Correspondence

Quality

Character

Set

Proportional

or Correspondence

Quality

characters are

selected

by

using ESC

DC1

or

ESC

DC2

control

code sequence.

The

characters

are

composed by

n

x

9

dot

matrix. These

widths

(n)

vary

from

10

dot

columns

to

20

dot

columns.

Since all

proportional

numerals

are

composed of

the

same

number

of dots the

horizontal

axis

(16

dot

columns),

tabulation

of numbers

are

aligned

vertically.

•

Proportional

Character Code

Table

The

following

lists all

printable

Proportional

or

Correspondence

Quality

characters:

Code Char. Width

Code

Char.

Width

Code

Char.

Width Code

Char.

Width

Dec. Hex Oct.

Dec.

Hex

|

Oct.

Dec. Hex Oct.

Dec.

Hex

Oct.

32 20

40

[Space)

10 64 40

100 (5 18 96 60

140

X

18

160 A0

240

/

18

33

21

41

I

10

65

41 101 A 20

97 61

141 a

18

161

A1

241

a

18

34

22

42

•

12 66 42

102

B

18

98 62

142 b

16

162 A2

242

c

16

35 23

43

#

20

67

43 103

c

18

99 63

143

c

16

163

A3

243

£

20

36

24 44

$

18

68

44 104 D 20

100 64

144

d

16

164

A4

244

N.

18

37

25 45 %

20 69

45

105

E 18

101

|

65

145

e

16 165

A5

245

M-

20

38 26

46

&

18 70

46

106 F

18 102

|

66

146 f

14 166

A6

246

°

12

39

27

47

•

10

71

47 107

G

20

103

67

147

g

16

167 A7

247

I

10

40

28

50

(

10

72

48

110 H

20

104

68

150

h

16

168

A8

250

16

41

29

51

)

10 73

49 111

I

12

105

69

151 i

10 169

A9

251 §

18

42

2A

52

*

16

74 4A 112

J

18

106

6A

152

i

10

170

AA 252

®

20

43

2B

53

+

16 75

4B 113 K

18

107

6B

153

k 16

171

AB

253 ©

20

44

2C

54

10

76

4C

114 L 18 108 6C

154 i 10

172

AC

254

1

A

20

45 2D

55

—

16

77

4D 115 M

20

109 6D

155

m 20

173

AD 2553A

20

46

2E 56

10 78

4E

116 N

18

110

6E 156

n

16

174 AE

256

Vz

20

47 2F

57

/

16

79

4F

117

O 20

111 6F

157

16

175

AF 257

c

16

48

30

60

16

80 50

120 P

18

112 70 160

P

16

176 B0

260

¥ 20

49 31 61

1

16 81

51

121

Q

18

113

71

161

q

16

177 B1

261

A

20

50 32 62 2

16

82

52

122 R

18

114

72

162 r

14 178 B2

262 O

20

51

33

63

3

16

83

53

123

s

18

115

73 163

s

16

179 B3 263 U

20

52 34 64

4

16

84

|

54

124

T 20

116 74 164 t

14 180

B4

264

c

18

53 35 65

5

16

85 55

125

U 18

117

75 165

u

16

181

B5 265

-

16

54

36

66

6

16

86

56

126

V

18

118

76 166

V

16

182 B6

266

a

18

55 37 67

7

16 87 57

127 W

20

119 77 167 w

20

183

87

267

6 16

56 38

70

8

16

88

58 130

*

18

120

78

170 X

16

184 B8 270 u

16

57

39

71

9 16 89 59

131

Y

#

18 121 79

171

y

16

185

B9

271

P

20

58

3A

72

10

90

5A 132

Z

16 122

7A 172 2

14 186

BA

272

TM 20

59 3B

73

10

91

5B

133

[

14

123

7B

173

{

14

187

BB

273

e

16

60 3C 74

<

14

92

5C

134

/

16 124

7C

174

i

10

188

BC

274 u

16

61

3D

75

=

16

93

5D

135

]

14

125 7D 175

}

14 189

BD

275

e

16

62

3E 76

>

14

94

5E 136

A

18

126 7E 176

-

16

190

BE

276

16

63 3F 77

? 16

95

5F 137

—

20

18

191 BF

277

f

16

Note: The

number

on width-column indicates a dot

size of

each

character.

52

®

Proportional Character

Sets

Dots

Per

Column

10 DOTS

12

DOTS

14 DOTS

Space

—32/20 "

—

34/22

<

—

60/3C

i

—33/21

I

—

73/49

>

—

62/3E

acute

—39/27

o

—

166/A6

[

-

91

/5B

(

—40/28

]

-

93/5D

)

—41/29

f

—

102/66

—

46/2E

r

—

114/72

;

—

58/3A

t

—

116/74

j

—

59/3B

z

—

112/7A

i

—

105/69

{

-

123/7B

J

—

106-6A

}

-

125/7D

1

—

108/6C

—

124/7C

T

—

167/A7

16 DOTS

*

—

42/2A

e

—

101/65

+

—

43/2B

g

—

103/67

-

—

45/2D

h

—

104/68

/

—

47/2F

k

—

107/6B

—48/30

n

—

110-6A

1

—49/31

o

—

111/6F

2

—50/32

P

—

112/70

3

—51/33

q

—

113/71

4

—52/34

s

—

115/73

5

—53/35

u

—

117/75

6

—54/36

V

—

118/76

7

—55/37

X

—

120/78

8

—56/38

y

—

121/79

9

—57/39

-

—

126/7E

=

—

61/3D

—

162/A2

?

—

63/3F

H 168/A8

Z

—90/5

A

<l

—

175/AF

\

—

92/5C

—

U

—

181-B5

183/B7

184/B8

Underlined) —

95/5F

e

—

187/BB

b

—98/62

u

—

188/BC

c

—99/63

e

—

189/BD

d

—100/64

/

—

190/BE

191/BF

53

18

DOTS

$

—36/24

&

—38/26

@

—64/40

B

—66/42

C

—67/43

E

—69/45

F

—70/46

J

—

74/4A

K

—

75/4B

L

—

76/4C

N

—

78/4E

P

—80/50

Q

—81/51

R

—82/52

20

DOTS

#

—35/23

%

—37/25

A

—65/41

D

—68/44

G

—71/47

H

—72/48

M

—

77/4D

—

79/4F

T

—84/54

W

—87/57

Underline(l)

—

95/5F

m

—

109/6D

w

—

119/77

S

—

83/53

U

—

85/55

V

—

86/56

X

—

88/58

Y

—

89/59

A

—

94/5E

\

—

96/60

a

—

97/61

s

160/AO

a

—

161/A1

,

k

—

164/A4

§

-

169/A9

c

—

180/B4

a

—

182/B6

£

—

163/A3

M-

—

165/A5

®

—

170/AA

©

—

171/AB

1

/4

—

172/AC

%

—

173/AD

1/

2

_

174/AE

¥

—

176/BO

A

—

177/B1

—

178/B2

— 179/B3

B-

185/B9

Tm

—

186/BA

54

Appendix

C/

Programming

Information

The

following

items

should

be

considered

when

you

program

the

Computer.

•

When

Printer

Power is

turned

on.

•

Selects

optional

function

set by

Function

Selection

Switch.

•

If

Data

Processing

mode

is

selected,

Full

Forward

Line

Feed

is

set.

•

Selects one

of

five

character

styles

by

Rotary

Switch

position.

•

Underline

is

not

set.

•

Sets

normal

character

(not-Elongated

and

not-Bold)

•

Buffer

memory

is

completely

cleared.

•

Every

character

font

can

be

intermixed

with

another

style

of

character

in the

same

line.

However, the

printer

will

insert

dot

spaces

to

ensure

that

the

new

dot

position

is

valid

for

the

current

character

size.

This

may

cause

unexpected

auto-wraparound.

To

prevent

this,

intermix

characters

only

on

short

lines,

or

don't

mix

character

sizes

on

the

same

line.

•

Since

a

proportional

spacing

command

may

be

used

in

any

character

set

condition,

right-justification

can

be

performed.

You

must

consider

that

proportional

spacing

commands

can

indicate

up

to

9

dot

spacing

while

using

Standard,

(10

or

5

CPI),

compressed

(12

or 6

CPI)

or

condensed

(16.7

or 8.3

CPI)

characters,

therefore,

a

normal

space

20

Hex

(32

Dec)

gives

12

or

24

dot

spaces.

•

Elongated

(Double-width)

characters

and

Underline

are

not

terminated

at

the

end

of

the

line

and

Printing

continues

until

a

terminating

command

is

received.

•

You

should

avoid

wrap-around.

Wrap-around

will

disturb

the

dot

count

of

the

text

in

a

line.

•

Backspace is

performed

in

the

same

manner

under

any

character

set

condition.

This

command

indicates

the

number

of dots

to

backspace.

•

If

block

graphic

character

codes

(EO

Hex

through

FE

Hex

—

224

Dec

through 254

Dec)

is

accessed

in

Proportional

character

mode

,

these

codes

will be

converted

to

an

invalid

code

(X

mark).

•

In

the

Repeat

Data

command,

printable

characters

can be

repeated

as

many

times

as

provided

for in the

count

number.

If any

function

code

is

received

for

repetition,

it

will

be

considered

an

invalid

symbol (X

mark).

•

POS

command

can

be

used

at

any

carriage

position.

If

designated

dot

column

address

is

in

the

current

text

which

is

already

printed

out,

overprint

will occur.

•

Under

block

graphic

printing,

Half

Line

Feed

Forward

should be

used

for

printing

of

diagrams.

•

Line

Feed

in

Graphics

mode is

different

from

Line

Feed

pitches

in

Data

Processing

or

Word

Processing

mode.

It

will

generate

an odd

vertical

spacing

in

Graphic

mode

while

the other

modes

intermix in a

form

.

Consider

the

following

relationship

between

Line

Feed

pitches.

7

Full

Line

Feed

=

12

Graphic

Line

Feed

7

Half Line

Feed

=

6

Graphic

Line

Feed

•

Graphic

printing can

be

intermixed

with

character

printing

in a same

line'

Dot

density

in

Graphic

mode is

same as

the

density of

former

character

style.

•

Bold

character

is

useful

for

heading

or

title.

55

Programming Examples

Note to Model

II

Programmers:

If the Printer goes off-line during a print

operation,

and

remains

off-line

for a certain period

oftime, Model II TRSDOS

will present

an error

message.

Application

programs should

be

written

to trap such errors, inform

the

operator

of

the

errorcondition,

and give the

operator

a

chance

to

correct the condition

and continue

printing.

If

itisaB

ASIC

applications

program.

an

I/O error will

occur, and the operator may

type

C N T

[ENTER] .

The BASIC statements LPRINT and

LLIST output to

the

Line

Printer.

See

Your

Computer's

Reference Manual for syntax details. If

you

have

a Color

Computer, read

all

"LPRINT"

as "PRINT

#

-

2/'.

Examples:

LLIST

Lists

the resident program to the Printer.

LPRINT "THIS IS A TEST"

Prints the message in quotes and

tells the

Printer that

the

next

printable

character brings a

new

line

.

LPRINT

4

THIS IS PART OF A LINE'

'

;:LPRINT

'

THIS IS

THE

REST'

'

Prints both messages on the

same

line

(because of the

semicolon).

The next printable character

received starts a

new

line.

LPRINT "SMALL";

CHR$(27);CHR$(i4);"LARGE";CHRS(27);CHRS(15);

"SMALL

AGAIN"

Prints both normal and

elongated

characters

on the same

line.

LPRINT "X"; CHRS(20); CHRS(27);

CHRS(30);

"2";

CHRS(27);CHRS(28);

"

+

X=Y"

Prints

an algebraical function expression X-

4-

X

=

Y.

LPRINT

CHRSU9);

"START";CHRS(27);CHRS(56);CHRS(138);

"ONE

LINE";CHRS(138);

"TWO LINE"

l

Prints these letters at

3

A line

pitch.

LPRINT CHRS(

15);

"UNDERLINE";CHRS(14);

"WITHOUT

UNDERLINE"

Prints both

messages

underlined and

non-underlined

in

the

same line.

LPRINT CHRS(27);

CHRS(3

1

)'

"BOLD

LETTERS";

CHRS(27);

CHRS(32);

"NORMAL

LETTERS"

Prints Bold letters and normal

letters

in the same

line.

LPRINT

CHRS(28);CHRS(9);

"ABC"

Prints 9

characters

of "A"

and one

character

"BC"

LPRINT

CHR$(13);CHRS(27);CHRS(16);CHRS(01);CHRS(44);"300TH

POSITION"

Prints

above message

from

300th column

address.

LPRINTCHRS(27);CHRS(i7);"A";CHRS(27);CHRS(09);"B";CHRS(27);

CHRS(06);

"C";

CHRS(27); CHRS(03);

"DE"

Prints ABCDE by using

proportional spacing.

LPRINT

CHRS(

1

8);

CHRS(255);

CHRS(247);

CHR$'(227);

CHRS(

193);

CHRS(227);

CHRS(247); CHRS(255);

CHR$(30)

Prints

a special

symbol in

Graphic

mode.

LPRINT

'

*

DELETE*

'

;

CHRS(08);

CHRS(72); '

7/////"

Prints the

message

DELETE,

then

it is

deleted

by

diagonal

lines.

56

Appendix

D/ Care

and

Maintenance

•

Always plug

printer into

a 3-wire

grounded

receptacle.

•

Be

sure that Front Cover is

closed

and secured

while in

operation.

•

Never operate Printer

without

paper.

If

paper used is

less

than

4"

wide, take

care to see

that

printing does not exceed paper

width

.

•

Avoid

leaning

objects

against Printer or placing

anything

on top. If

any

object

is

accidentally

dropped into the

machine, turn

power

off and

carefully

remove

object.

•

Be sure to turn

power

off

before

adjusting

the

penetration

or

replacing ribbon.

Note: When you turn

power

off, all data

stored

in Printer's

buffer

will

be

lost; keep

this in

mind

as you perform

routine

maintenance.

Remember

that

toggling

the

printer'

s

power

can

also

cause erratic

operation of the

Computer.

•

Use only lint- free cloth to

clean printer

surface.

Do not

use solvents or

harsh

cleaning

agents. Mild detergent

solution or

desk top

cleanser

may be used

sparingly.

•

Keep hands

away

from carriage

mechanism

while

Printer is in

operation.

Since

carriage

moves

with considerable force,

inserting hand

would

be

extremely

hazardous.

•

Printer

must be

kept dry. If water is accidentally

spilled

on machine,

turn

power

OFF

immediately

and

wipe

dry. Do

not

turn power ON

until

completely

dry.

•

If

printed

material

is

too

light

or

too

dark, check to

see if the

Print Head

is

adjusted

properly. See the section entitled

Tanfold

Paper

Loading' for

specific

details

on

adjusting the Print Head.

Care

•

Do not use

organic

solvents or

alcohol when cleaning

the

cover.

•

Never operate

Printer

when

Front

Cover is opened.

•

Never

set the Printer where

it is exposed to

direct

sunlight.

•

Prevent the

Printer from

vibrating during

operation.

•

Graphics

printing

places a

heavier

load on the

print

head

than do text characters

.

If

you

print too many block

graphic

characters or bit images

without

pausing,

the

print

head

could

overheat,

causing

the

fuse to

blow.

When you

must print

graphics

continuously,

be sure to

pause the printing for

at

least

one

minute after each

l/6th

paper

is printed. This

will

prevent

the unit from

overheating.

In

terms of

Load

on

the

print head, the underline

falls

into

the graphics category,

and

should

be treated as

such.

Maintenance

•

•

If

the Print Head becomes clogged

with ribbon

material

or paper

lint,

carefully

remove

such material with a finely

pointed tool

(preferably

a

toothpick)

.

This

should be

regularly

checked.

•

A Print Head's life expectancy

is

approximately

2000 hours (in other

words,

if

you

use

the

Printer

two

hours

a

day on the

average, the

Print Head

should be

changed

every

32

months)

.

When

poor print

quality ,

sticking

ribbon , or

bent

character

printing

occurs,

you

should

have

the

Print

Head

replaced

by a Radio

Shack

service

technician.

57

•

After cleaning with a soft cloth , lightly oil the

two

carriage guides

with

a

high-grade

ester

lubrication oil

or

with high-grade

sewing machine oil. (This should be done at least

every

six

months

.)

Lubricate

the

platen removing shaft, the

left

wire

pulley shaft, the right

wire

pulley shaft, the ribbon feed

revolving

shaft and the

gear

revolving

shaft,

using

molybdenum disulfide compound or other

high-grade lubricating grease.

•

Because

ink

from

the

paper

can

get

on

the

paper

bail

rollers,

we

suggest

a

periodic

cleaning

of

the

rollers.

Use

90%

isopropyl

alcohol

to remove

ink~build

up

on the

rollers

as often

as necessary.

If

You

Have

Problems

. . .

If the Printerfails

to operate properly,

try to

solve

the

trouble

by

using

the

following

table.

SYMPTOM

INSPECTION and

ADJUSTMENT

Printer does

not

operate when

POWER

switch

is turned

ON.

Printer

stops

before

paper runs

out

Printer stops with

ALERT

indicator lit.

Ribbon

fails to

track

properly.

Poor Print Quality

or

smudging

on

paper.

Erratic

operation

or

wrong

character

printing.

The

paper

cannot

be

advanced

smoothly.

Is

power

cord

properly

connected?

Is

power

source

voltage

too low? Printer should stop if

below

90% of rated voltage.

If

you cannot hear

any

sound

or see any

movement,

remove

the Front Cover and

check

the fuses.

(Even

if DC

driver

power fuse

is

broken, the indicator on the

control panel will

be

lit

when

power

is ON.)

Is paper loaded properly?

Is carriage guide dirty? If so, clean it by using soft

cloth

and

lubricate high-grade ester lubricating

oil

or

high-grade

sewing

machine oil.

Has

some

object

dropped

inside the Printer?

If

nothing

is

wrong,

turn

power

OFF,

then ON.

Is ribbon

cassette properly

set?

Has ribbon come off from print head ribbon guide

and

is loose?

Is

ribbon

so

worn

that

it does not feed

smoothly from

cassette?

Has

the print head

reached its life

expectancy?

Worn out

head will stick to

ribbon and interfere

with

smooth

movement. Replace the

print

head

with a

new

one

.

•

Is ribbon old and/or worn?

•

Is

Penetration

Control Lever

set

at

proper

position?

•

Is tip of print head dirty?

If

dirty,

clean off

with

a toothpick

or

needle.

•

Is interface cable and/or

connector damaged?

•

Are

interface

connectors

inserted

properly to the

Computer

and to the Printer?

•

Is

paper loaded properly into

entrance of

insertion

opening?

•

Is

any

obstacle

preventing

smooth

paper motion?

•

Doespaperstickortearbecauseofsideguidepins?

If the trouble

cannot

be

corrected after making the

above

check-up

and adjustment, check for

secure

contacts of

all

connectors.

If

you can't

elimate the problem,

take

the

unit

to

your Radio Shack

Store

or

Computer Center

forrepair.

We'll

have

it back

to you

ASAP!

58

DMP-200

Printing

Limits

(Duty

Cycle)

DMP-200

Printing

Limits

"Tinting

s

^:fat>-

Character

Bit Image

Block

Graphics

100%

707c

50%

100%

70%

50%

100%

70%

50%

for

Number of

Pages

15

50

continuous

T-/y

4

20

3

5

Note:

These figures

are based on

a 80-column

printing

width.

100%

printing

would

mean

every

column

is

printed;

50%

printing

means

that

every other column is

printed.

59

Appendix

E/

Specifications

Printing

speed

Standard

1

20

characters per

second

Elongated

Standard .

. .

60

characters per

second

Compressed

116

characters

per

second

Elongated

Compressed

58

characters

per second

Correspondence

Quality

70

characters per

second

Elongated

Correspondence

Quality 35

characters

per

second

Proportional

95

(Typical)

characters

per

second

Elongated

Proportional

47.5

(Typical)

chracters

per second

Condensed

116

characters

per second

Elongated

Condensed

-.

-

.

58

characters

per

second

Characters Per Line

Standard

80

characters

per line

Elongated

Standard

40

characters

per

line

Compressed

96

characters

per

line

Elongated

Compressed

48

characters

per

line

Correspondence

Quality

80

characters

per

line

Elongated

Correspondence

Quality

40

characters

per

line

Proportional

80

~

160

characters

per

line

Elongated

Proportional

40-80

characters

per

line

Condensed

133

characters

per line

Elongated

Condensed

66

characters

per line

Dots

Per

Character

Standard

12dots

percharacter

Elongated

Standard

24

dots per

character

Compressed

12

dots per

character

Elongated

Compressed

24

dots

per

character

Correspondence

Quality

20

dots

percharacter

Elongated

Correspondence

Quality

40

dots

percharacter

Proportional

10-20

dots

per

character

Elongated

Proportional

20-40

dots

per

character

Condensed

12

dots

per

character

Elongated

Condensed

24

dots per

character

Vertical

Spacing

12,6,

8

lines

per

inch

(Computer

select-

F

able),

7/72"

and

1/72"

(1/12

line

feed)

available.

(Bidirectional

when

12

or

6

lines

per inch

are

selected.)

Dots Per

Line

Standard

960dots

Elongated

Standard

960

dots

Elite

1152dots

'Elongated

Elite

1

152

dots

Correspondence

Quality

1600

dots

Elongated

Correspondence

Quality

1600

dots

Proportional

1600

dots

Elongated

Proportional

1600

dots

Condensed

1600dots

Elongated

Condensed

1600

dots

61

Character

set

Proportional,

Correspondence

Quality

ASCIL94,

European

symbols:32

Condensed,

Elite,

Standard

ASCIL94,

European

symbols: 25,

Kana:64,

Block

Graphics:30

Interface

Parallel

8-bit

with

strobe

signal

Serial

8-bit,

Baud

rate

selectable

(600BPSorl200BPS).

Print

Head

Life

20G0

Hours

typical

Preventive

Maintenance

Normally

every

6

months

Temperature

and

Humidity

Range

Operating

41T-104°F

(5°C-40°C)

40%-80%

Storage

-40TM60°F

(-40°C-71°C)

20%-90%

Paper

Fan

Fold

Paper

4"-10"

wide

with

guide

holes

Single

Sheets

4"-ll"

wide,

good

quality,

40-60

Kg

(14-22

lbs.)

Roll

paper

8.5"

wide,

1"

core,

5"

dia.

Max.

Copy

Paper

1

original,

2

copies

34 Kg

(1

1 lbs.)

non-carbpn

paper

Ribbon

Cassette

Radio

Shack

Catalog

Number

26-1483

26-

1489

(Refill

pack)

Power

Requirements

120

VAC,

60Hz,

(for

USA/Canada),

or

220V/240

VAC,

50Hz

(for

European

and

Australian

models).

85W

maximum.

62

IMPORTANT

INFORMATION

This

equipment

generates

and uses

radio

frequency

energy. If

it is

not

installed

and

used

properly,

that is,

in strict

accordance

with

the

manufacturer's

instructions,

it may

cause

interference to

radio

and

television

reception.

It

has been

type

tested

and

found to

comply

with the

limits for a

Class B

computing

device in

accordance

with

the

specifications

in

Subpart J of

Part 1

5 of FCC

Rules

,

which

are

designed

to

provide

reasonable

protection

against such

interference

in a

residential

installation.

However,

there

is no

guarantee

that

interference

will

not

occur

in

a

particular

installation.

If

this

equipment

does

cause

interference

to

radio or

television

reception,

which

can

be

determined

by

turning

the

equipment

off and

on

, the

user is

encouraged

to

try

to

correct the

interference

by

one

or

more

of the

following

measures:

•

reorient

the

receiving

antenna

•

relocate the

computer

with

respect

to

the

receiver

•

move the

computer

away from

the

receiver

•

plug

the

computer

into a

different

outlet

so

that

computer

and

receiver

are on

different

branch

circuits.

If

necessary

,

the user

should

consult

the

dealer

or an

experienced

radio/television

technical

for additional

suggestions

. The

user

may

find

the

following

booklet

prepared

by

the

Federal

Communications

Commission

helpful:

How

to

Identify

and Resolve

Radio-TV

Interference

Problems.

This

booklet is

available

from

the

United

States

Government

Printing Office,

Washington, DC

20402,

Stock

No.

004-000-0035-4.

Warning: This

equipment

has

been

certified

to

comply

with

the limits

for

a

Class

B

computing

device

,

pursuant

to

Subpart

J

of

Part 1

5

of

FCC

Rules.

Only

peripherals

(computer

input/output

devices ,

terminals

,

printers ,

etc

.

)

that are

certified

to

comply

with

the Class B

limits

may

be

attached

to

this

computer.

Operation

with

non-certified

peripherals is

likely

to

result

in

interference

to

radio

and

TV

reception.

RADIO

SHACK,

A

DIVISION

OF

TANDY

CORPORATION

U.S.A.:

FORT

WORTH,

TEXAS

76102

CANADA:

BARRIE,

ONTARIO

L4M

4W5

AUSTRALIA

280-316

VICTORIA

ROAD

RYDALMERE,

N.S.W.

2116

TANDY

CORPORATION

BELGIUM

PARCINDUSTRIELDENANINNE

_5140

NANINNE

U. K.

BILSTON

ROAD

WEDNESBURY

WEST

MIDLANDS

WS10

7JN

j

8A2

PRINTED

IN

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