Tandy DMP-105 Operation Manuals

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Dot

Matrix

Printer

DMP-105

Operation

Manual

Catalog

Number 26-1276

Contents

Introduction

1

I/Description of

the DMF105

3

2/Setting

Up

the

DMF105 7

Paper Separator

Installation

,

7

Tractor Installation and

Removal

7

Paper Loading

9

Ribbon Installation Replacement

12

Setting

Print Function

Switches

4 DIP

Switches) 14

Connecting

the DMP-105 to a Power Source 14

Carriage Movement

Test

15

Self-Test

„ is

Connecting

the DMP-105 to

a Computer

,

. 16

rower-u p sequence

..................,.„,.,,.„,,„,„,,,„,.,,,

16

3/Using the DMP-105 (General Printer

Operation)

n

Control

Codes

17

Sending Control Codes

from

BASIC IS

Character

Printing Mode

, 18

Graphics

Mode

18

Selecting

a Print Mode

19

4/Print

Font

Styles

and

Character Widths . 21

Selecting

Font Styles

21

Standard Character Font Style

22

Graphics

Characters

•„„„„

, ..... 22

Wrap-Around

«

23

Elongated

Characters

...........

23

Bold

Characters

24

Mixing

Bold and

Elongated

24

5/General Control

Codes

is

Line Feed

Codes (LF>

25

Special Line Feed

Codes

25

Carriage

Return

(CR)

16

Ignored

or

Undefined

Codes

26

DMP-105

Buffer

Operation

27

6/Charaeter

Printing

Mode

m

Repeat Printing

29

Underline Printing

29

Print

Head Positioning

30

Printing

Directions

32

7/Graphics Mode 33

Printing Graphics Patterns 34

Line

Feed

36

Repeat

Function 36

rniit tLrCHSJij ^m.^...^..*,...

........i....ir....niMu ji

Leaving

Graphics Mode

37

Mixing Modes on the Same Line 37

Freehand

Drawing

,

,

37

Appendix

A/Control

Code

Summary 39

Appendix B/Interface 41

Parallel Interface 41

Serial Interface ............

„,„„„,.,.,

44

Appendix

C/Charaeter

Sets

47

94 ASCII Code

47

32

European Symbol

Code

,

43

30

Block Graphic Code ..,....,.

49

Appendix

D/Programming

Information ......

si

Appendix E/Care and

Maintenance

&

Printing Limits (Duty Cycle)

55

Appendix F/Schematic

Diagram

57

Appendix

G/Specifications

m

Introduction

Congratulation* for selecting this

Tandy compute- product! The DMP-105 is a

dot-matrix

printer

which

can perform a variety of different printing operations.

For instance, it can print:

•

Normal r.harjitrrrrs (Nfirmal, (^nndrnsrrl and

Compressed)

•

Graphics characters.

The DMP-105 operate.? in turn modest

•

Character Priming

Mode for output

of

program listings,

report

writing,

or the

creation of any text documentation,

•

Graphics Mode for drawing pictures, figures. Or graphs.

In the rtwivteT Printing Mode,

the

nMP-ICfi

prints monospaced.

&7

dot-

matrix characters.

In

Graphics

Mode, you can

use graphic

data to

draw

just about any type of

graphic configuration you desire.

You can use two types: of paper with the DMP-105:

•

Standard

(4*—

9,3*

wide) computer fanfold forms with guide holes. The

Printer can aiso print

one

original p(ut

one carbon

copy.

•

Standard

(4*

—

9-5

*>

single-sheet typewriter paper.

nrhw .«ifiwflr(»-(v>nTrrtllert fiwriirc-t,

Include:

Bidirectional minimum-distance

access

carriage motion.

»

Full,

half,

3wl

J/4

Forward

Line Feed.

•

Underline,

capability.

and much

more?

1/Description of the

DMP-105

Carefully unpack the DMP-105, being sure to locate ihe Ribbon Cassette and [he Paper Separator.

Keep lite

empty

box and packing material

just in ease you

ever

need to transport the Printer.

Be sure

t&

remove the

Yellow

Band

from

the Carriage -

Figure

f. Removing the Yellow Band

It's

important

iu

L"ttouic familiar with lIk:

DMP-IQ3

nefnre

yon

<&t

[1 up and

bejPTi j^ing ii.

Figure 2. DMP-10S (Top View)

(T) Power ON/OFF Switch, Press [he side

of

the

switch marked

f to

turn

ihe

power

ON, Press

the switch

the

other way 10

turn

the power OFF, Note

that

turning the

power

OFF and ON during operas

ion

may cause loss of the

current program,

©

POWER ON

Indicator. This

indicator

will illuminate

when the

DMP-105 is

properly connected and the Power ON/OFF

Switch

is set to ON.

(J)

ON-LINE/OFF-LINE Switch. When

this

switch

is pressed in, the

Printer

is

placed ON-LINE, When it is pressed again and released, the

Printer is

placed

off-line.

(3)

Platen Pressure Lever. This.

lever

has

two

positions.

One is Release. Tor the

tractor feed

feature

(toward

the

front of the Printer);

the

other

is Friction,

fpr

the

friction

feed

Feature

(toward the rear of the

Printer),

©

Paper Bail. For optimum print

quality,

keep the Bail

down

on the paper.

(6)

Tractor Feed. This

Tractor

Feed is removable. Sec Selling Up

the

DMP-105

tor details or using the

Tractor Feed.

You can

remove

the

Tractor

when

priming on

single-shed

paper.

@

Tractor

Cam. When

the Cam is moved

toward

the rear or the Printer, the

TrftCtOr can slide from side to

aide, and when moved toward

the front,

it is

locked

into

position.

(§)

Paper

Feed Knob. Turn this

knob

to manually

advance

the

paper,

(f)

Paper

1

risen iun

Opening.

Be sure the paper eniers

(he DMP-105 hert.

®

Platen.

@

Top Cover.

@

Transparent

Cover, This

Cover

may be opened while handling

ihe

Paper

Bail.

@

Hole

Cover.

Pui this

Cover

in place when the

Tractor

is

removed.

@

Paper

Separator.

Model II users: If aBASiC program srnps

txmifion

because

of

a Printer error,

typing-

CONTCiEEB)

will cause

printing

[0 resume,

However

the entire con-

tents of the

print

buffer will be

printed,

scar ting with the

current

Print Head po-

sition.

Figure

3.

DMP-105

(Rear

View)

Power

Cord. Plug

the power

cord into a

wall

outlet or approved

power

strip,

®

Parallel

Interface

Connector.

If your

computer has parallel

interface

capabilities,

connect the

cable

here.

3« Selling L*|t lire DMP-1(Mi

for the

right cable

for your computer.

(3)

Serial

Interface

Connector,

If you have

a

Color Computer,

tujuiect

the

ca-

ble to

the

serial

interface

connector

indicated.

See Setting Up

(he DMP-105

for the

right

cable for your Color

Computer

.

@>

Priit

Function

(DIP)

Switches.

The

settings

of these Switches

wilt

determine

exactly

how your

Printer

prints in any

situation.

Such parameters

u baud

rate

(6G0 or 24U0

baud) or

whether

you're

using the

serial

or parallel inter-

face

must be

set via

these

Switches.

2/Setting

Up

the

DMP-105

The following Start -Up Checklist is a s'Jfiimaty

of how to set up your Primer.

You should

follow

this procedure

every time

you start -up the Printer

—

NOT

JUST THE FIRST TIME.

Kind a good spot for your Printer.

Be sure to consider:

*

Th.e

Printer

should be placed on a sturdy work surface.

•

Lhe length of the printer

cable

will

determine how

far from

your

computer

you can place the Printer.

*

Paper takes up space. Be sure to leave enough room for smooth paper

flow.

•

Don't place the Printer near noise generators such as

refrigerators

and

industrial equipment.

Be sure

the

Power

Switch

(on the right side of the

Printer)

is OFF.

Remove the packing

materials,,

including the Yellow Band.

Install

continuous

form

fartfold

paper

or single-sheet paper.

Check the

Ribbon

Cassette.

If

it

has

not

been

installed,

see Ribbon Insfal-

ttrion/Rfplnfemeat.

Set the Print Function

(DIP) Switches

(on the rear side of the Printer).

Connect the AC

power

plug

to a 3-wire, 120 volt, 60 Hz grounded

AC

outlet (220/240 V. 50 Hz

where

the unit is so marled),

Check to see if the

Printer

is ready by running the Self-Test.

G

Connect the

interface

cable

from the computer to the

printer

interface

connector,

Q

Turn

the Power ON and check that the Power

ON Indicator (on the Con-

trol

Panel)

is illuminated.

Place

the ON-LINE/OFF-LINE

Switch

in the ON-LINE

position,

Be sure that the Top

Cover

is closed securely.

Paper

Separator Installation

Install the Paper

Separator by inserting

the

tips of the Separator into holes

provided on

the

top of the Printer

(behind (he Paper

Insertion

Open in*}.

Tractor

Installation and

Removal

This

Printer

can be

used with

either the Tractor Fe*d

system

or the Friction

Feed

system.

The

difference

is that ihe Tractor

Feed system

is used

with

paper

which

has jjuide holes on both edges, while the paper

used

with

the Friction

Feed system

does

not

have

these holes.

The Friction F«d

system

may be used with the

Tractor

installed;

however,

bet-

ter operation can

be

achieved if it is removed

—

especially

when

using single

sheets of paper.

Removing

the

Tractor

1. Set the Power ON/OFF

Switch

to OFF,

2-

Open

the

"T

dp Cover.

i.

Move

the

Paper

Bail forward (toward [he front of the Printer).

4. Hold the front bar of the Traclor in

your

hard and

pull upward; then push

it

away

and

remove

the

Tractor.

5. Move the Paper Bail backward.

6. Close the Top

Cover,

Installing

the

Tractor

1

.

Set ihe

Power ON/OFF

Swiich

to OFF.

2. Open the Top

Cover

and remove the Hole

Cover.

3.

Move

(he

Paper Bail

forward

(toward

the

front

of

the Fruiter},

4. Place the pins in the

Iractor

onto the cutouts, then

push

down on the front

of the

Tractor

until the Tractor is securely

locked

into position.

5. Move

the Paper Hail

backward.

6. Close the Top

Cover

.

Figure 4,

Installing

the

Tractor

Paper Loading

Warning! When loading

paper (single-sheet or fanfold), be sure the paper cor-

rectly

enters the

Paper

Insertion

Opening.

It is

very

important that the paper enters the DMP-105 straight. The paper must

be directly behind

the

Printer

or paper

skewing

or

jamming

may

occur.

Proper

positioning

of the Paper Separator is also Important to help

prevenl

paper

jamming.

PRINTER

_

PAPER

WRONG RIGHT

If the

fanfold

p&pa

:

*>

correct^ loaded, i! should enter

between

the bod> nr

the

Primer

and

the Paper Separator. Once

the

paper is

loaded

and

power

is ON.

press to set the ON-LiNE/OhP-LlNE

Switch

to ON-LINE. Then you may begin

printing.

Single-Sheet

Paper Loading

1.

Re

sure rhp

Pnwer

Swirch

U OFF.

2. Remove

the

Tractor

and set the Hole Cover in

its

place . (See Tractor Instal-

lation ami Hrmnvul

)

3.

Move

the Platen Pressure Lever forward

(toward the

front of ihe Printer),

4.

Open

the Transparent Cover and tilt

the Paper

Bail

forward.

5. Insert the

paper

into

the

Paper

Insertion Opening

and

push

the Platen

Pres-

sure

Lever

back

toward

the rear side of the

Printer.

Use ihe Paper

Feed

Knob

to

pull

the

paper around until it appears between

the

Platen

and the

Prim Heail

6. Move the

Platen

Pressure Lever

forward to align

the

paper. Push the Platen

Pre«iir*

Lever

back again

7.

Tilt the

Paper Bail

back lowatd the rear side of

the

Primer.

8. Close

the

Transparent

Cover.

Warning?

The

nap

between

the

Print

Head

and (he

Platen

is

mechanically

ad-

justed prupcrlv at

the

factory.

Do not lr> to admsi it,

If it looks like il is out

of

position, contact

your total Radio Shack Computer

Set

vice

Center,

Figure 5

PW9-B

Wiring SHo

Hints and Tips

On

Single-Sheet

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.

First, press

to

release the ON

LINE/OFF-LINE

Switch

to

OFF-LINE.

Nevr,

insert another

piece

of paper and turn

the Paper Feed

Knob

to advance

tlie paper.

When

the

paper is in

place,

press the

ON-LINLVOFF-LINE

Switch

again and the

DM

P-

105 wili

continue

printing

from

where it left

off,

wllhuut

luss

of data in

the print

buffer,

*

Remember

to set

the Platen

Pressure

Lever and the

Paper Bail kmajd

the

icar

of

the

Printer while

using

single-sheet

paper.

*

When you want to

print a few

more

lines

after the

paper has

passed ilie Pav*i

Empty Sensor,

press

the

ON-LINE/OFF-LINE

Switch

once

to set ii to

OFF-

T

INF;

ihen press it again to set it

to

ON-LINE. This

will prinl one

more

hne.

Just

follow this

procedure

once

for

each

additional line

you

wish to print.

Fantold Paper

Loading

The DMP-IM

will accept

standard

fan fold

paper

that is from

4*

to

9.5*

wide.

The paper may

mo

main <jue

urigin.nl

plus one copy.

Before using

fanfold

paper,

however, the Tractor

unit

should he

installed.

TO load

fanTuld

papei lulu

the

DMP-105;

1

.

Set the

Power ON/OFF

Switch 10

OFF,

2. Open the

Transparent

Cover.

3.

Gently

mp^ft

th*

Platen

Pr*«nre Lever and the

Paper

Bail toward the

front

of the Printer

-

*, Open

ihfl

Pin

F«d Paper

Clamps

10

5.

Pbss

the

paper between the body of

the

Printer

and the Paper Separator, In-

sert

ih* paper in lo she

Parvr ir^nnn Opening t\-\d puih if i

-

Platen Pccssuro

Lever back toward the

rear

side

of the Printer. Use l he

Paper

Feed

Knob

to

pull

i he paper around until it appear

between

the Platen and the Prim Head.

Be

sure

i

he

paper b straight skj tliai ilit hults

will

line up

with the

pin

feed

sprockets.

Move

the Platen Pressure

Lever

forward

to

align the

paper; since

pin feed

paper

is

being used, leave the Platen Pressure

Lever

in

ihe

forward

position.

Note: If re-positioning of the Tractors

is necessary,

move the Tractor Cams

Loward

(he rear of the Printer ao

that the

Trwjtors #nn

slid* from aid*

to side;

after

adjustment,

pull the Cams forward to lock the Tractors

into

posilion.

6. Close the

Pin Feed

Clamps to secure the

pspcr,

7. Move the Paper

Bail

toward

(h? paper,

8.

Close

the

Transparent CoveT.

(fXT-

^e.

J.

Figure 6. Fanfold Paper

Loading

Warning! The gap between the Print Head and the

Platen is mechanically ad-

justed properly

at ihe

factory. Don't try to adjust it. If tl

Looks

like

it

1$

out of

position, ftiitiact youf locaf Radio Shack Computer 5erv lee

Center.

Hints and Tips on h ant old Paper Loading...

•

Remember to set the Platen Pressure Lever toward the front of the Printer

and the Paper Bail toward the rear

of

the Printer while

using

fan

fold

paper.

Be sure that the paper is

positioned

so ihat

it

can

travel

through the Printer

without binding.

Do rial let paper pile up on top of imprinted

paper

or printed paper may b*

pulled back into the Paper Insertion Opening.

This

could

jam the paper feed

or damage the

Printer.

11

Ribbon

Installation/Replacement

If

the

Ribbon

Cassette is already installed, simply

check to

see that it is properly

threaded

berw«n

the paper and Print

Heati,

[f

the

Ribbon

Cassette is not installed,

or

iT it must be replaced due to excessive

mew,

faint

iniutirtg.,

etc.,

follow

this procedure:

1. Set the Power

Switch

to OFF.

(NOTE; When

you turn the power OFF. any

InitofwatloB

»luicd

]u Uic Printer's bjffer will, automatically be lust,)

2. Open the Top

Cover.

3. Gently

grasp

the Ribbon Cassette and remove the

Cassette

by

lifting

it

upward.

Nflte: Ei*ry

time

you replace the ribbon cassette; clean

the

(wo

ribbon guide

posts

(located

at the left end of the carriage shaft) with

a

soft

dry

elofn.

4.

Unwrap

the

new

Cassette

and

remove

Lhe

packing

foam.

5. Gently

move

the Print Head lo

the

extreme right.

CAUTION: Be sure Printer power is OFF before manually moving rhr

Print

Head.

6- Hold

the

new

Ribbon Cassette and pass the ribbon end

around the

Ribbon

Guide

Posts at the left of the Printer; then

move

trie

dinette

toward

the

right to draw out the ribbon.

7. Gently press the

Cassette down

until it is firmly secured by the Stopper

Claw

of the Cassette Holder.

Do not

force the

Cassette into

place!

If ihe Cassette is not properly fitted,

the

Cassette

Knob

will

not match up with the shaft from the Cassette

Holder. Do not force

the-

Cassette

down,

but

fit It in gradually while push-

ing and turning the Cassette Knob in

the

indicated

direction.

8. Once the

new Cassette is

installed,

move the

carriage back and forth manu-

ally, lhe ribbon

will

be gradually inserted between the Ribbon

Guide

and

Print

Head.

y.

Keep

moving

the

Carriage

and check that the ribbon

advances

properly. If

the

ribbon

has

not been propeily fitted

between

lhe Ribbon Guide and Print

Hear] (i.e., into The Print H-ead Rihhmi Guide fle/frl), lhe ribbon f**d will

not Operate smoothly. (See Figure

7.)

in. Glow th* Top Cover.

12

Mbbon Guide Posit

Cassette

Knob

Figure

7, Ribbon Cassette Installation

13

Setting Print Function

Switches

(DIP Switches)

There are

two

switches

located on the left rear side of (he

printer. These

Switches allow you lo customize

some

of

the

DM

P-

105 features for

your

own

applications.

When you

receive

the DMP-105, all

**itebei

should be set to OFF (i.e.,

in

the

down

potftkm).

By setting Certain

switches

ON

r

tWjw turning Hie DMP-lOS's

power

ON,

you can select

different

baud rat«

and

interface modej-

Figure S

and Table I define the different

switch

positions and Sittings.

Remember! The

Printer

power

must be OFF before

fo*

change any of the

Switches.

u

u

—

1

ON s»de

I OFF Sid*

Figure fl. Print Function (DIP}

Switches

Table 1. DIP Switch

Settings

Pos.

Symbol

OFF

ON

ParalloNScrial

2400

BPSf

600 BPS

Parallel Interface is

available

Serial

Interface

ifi

available.

When the Serial In-

terface

is

available.

transmission

rale

is

Set

to

2400

8PS.

When the

Serial

In-

terface is

available,

transmission

fate

Is

set to 600

BPS.

Connecting

the

DMP-105

to a

Power

Source

BeJuie

pliiKgiHK

the

power

cord

into an AC

paw«T

outlet,

chick the

Following:

Q

Is

the

Printer

Power

ON/OFF

Switch set

to OFF?

Have you LemweU

the

Yellow

Dand from the

Carriage?

13

Don'!

connect

the Printer to

your

Computer

yet.

14

Connect the

AC

power

plug lo a 3-wire. 120

volt,

60 Hz grounded

AC outlet

(220/240

V.

50 H*

where

the unit is

so

marloed), or to

an

approved

power

strip such as

the

Plug-In Power Strip (Catalog

Number

61-2619)

or the

Automatic Po*er

Controller,

5W-301 {26-1429).

Carriage

Movement

Test

The

Carriage Movement

Test

jilluw;,

yuu Lo cttcck that the Carriage

moves

ffeely

from one end of the PlaTen

io

the other and thai

ihe

Platen

is turning properly.

Printing Is not pei

formed

during ihe Carriage Movement Teat.

You

can run the Carriage Movement

Test by following these steps:

t.

Set

the

ON-LINE/OFF-LINE

Switch

to OFF-LINE and then

set the

Power

Switch

to ON.

2. Th* Carriage first

moves

toward

;he right

until

it strikes the Right

Switch

which

determines

the home position at the left;

then

il

moves

left until it

reaches

the

home position.

Press the ON LHMF/OFFUNE

Switch

to

set it

to ON-LINE

while

the

Carri-

age is moving

toward

the left. The

Carriage

will move back

and

forth,

per-

forming a Line Feed

at

the

end of each line.

3. Turn

the

power

OFF to end

the

Carriage Movement Test.

Setf-Test

The DM

P-

105

has a bulli-ln

Self-Test feature

which

lets you check printing

quality

and general printer

operation

before you

connect the Printer to your

computer.

This

is

a good time to check

that I he Print Head Ls set properly

(printing

is

neither

loo faint

noi

smudged) and that

paper

is feeding

correctly,

The Setf-Test will

last

for several minuies.

Before running

the

Self Jest,

however,

always

be surc

to

load

the DMP-105

with wide

paper

(9,5

"

wide)

since

the Test

prints

from one end

of the Platen to

the other. Printing

<m

the

Plakrt can shurlen the life

of

(be 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 ON-LINE.

3. Set the Power

ON/OFF

Switch

to

ON,

4.

Press Ihe

ON-LINE/OFF-LINE

Switch

to

aet it to

OFF-LINE

while the

Car-

riage

is moving toward

the

left.

The Printer *ill begin printing

rolling

ASCII

M

characters

in Slauduid 10

CPI

mode.

J.

Printing

will

continue

until

you turn the

power

OFF.

15

Connecting the

DMP-105 to a

Computer

Before making any

connections

between the Printer and your

ctimputeT,

be sure

all units arc off!

You must

also

be sure you

have

the collect cable for your

computer if the

DM

P-

10S is to operate property. Table 2 describes the printer cables carried by

Radio Shack; Table 3

provides

a

quick

reference for printer connection lo-

cations.

Table 2.

Computer

to

DMP-105 Cables

COMPUTER

Cable

Number

Model I (Keyboard

only)

26-

14 11

(available

through National

Parts)

'

Model I (Exp.

interface)

26-1401

Model II/16/2000/DT-1

26-4401

Model Ml/4 2G-1401

Color

Computer

26-3020

Model 100

26-1409

Tabid

3:

Computer

Connection

Points

computer

Connector

Model

L {Keyboard only) Rear

side

of

Keyboard

Model

l

{Exp.

Interface) Left side of E.I

Model 11/16/100/2000

Rear

Panel

Of

Computer

Model iiWQT-1

Underneath

Panel

Color

Computer

Rear

Panel of Computer

1. Attach the molded male end of the

cable

to

the

connector

on

the left rear

side of the Printer.

Do not

force the plug. If h doesn't

Tit one way, turn it over and try again.

2. Connect the other end

of

the cable io the Printer JacV of your

Computer,

See

your

computer

owner's

nianual for

spec! fit instructions.

Power-Up

Sequence

The

specific

power-up sequence

will

depend

upon

your Computer,

We

suggest

you consult your

computer

owner's manual for

details

on powering up your

computer

with peripheral

devices

(pitch

as pihiicis).

In any

event,

the Power Lamp *ill

remain

lit while the Printer

is

ON,

It is essential

that

the

Primer remain ON

when

connected to the

Computer,

If

you turn (he

power

ON

or OFF, ur a

Printer

la connected but not turned on,

erratic operflTlori of

the

entire system may olcui.

16

3/Using the DMP-105

(General Printer

Operation)

The DMP-105 is designed for two distinct applications:

*

Character

Printing

*

Graphics

Printing

The Printer responds to software codes from the computer in

two different

ways

—

one tor each application. The two response patterns, or modes,

have

many

similarities, but each has its

own

unique

features.

The

Character Printing

Mode is used for printing

characters. In this mode, Line

Feed commands do not cause immediate printing. Instead, ttiey

are stored

in the

Printer's

memory along with the other data.

When

the current line

is printed,

the

tine E-eed

commands stored in the memory determine the

pitch

qf

the

paper

feed.

The Print Pitch (character spacing) is determined by the space the DNtP-105

pats between eovii printed

character

and ai*o by the Tout Style. Consequently,

you must think of Pitch in terms of the number of characters printed per Inch

-

IOCP1, 12 CP1, and 16.7 CPI for Standard printing and 5 CPI, 6 CPI, and 3,}

CP1 for Elongated printing.

En

Li tup

hies 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

Character Printing operation)

cannot be used.

The

DMP-105

doesn't retitrn

an error when you send such a code

—

it simply

ignores

the code. This includes codes that change iine fsed

pitch. Graphic*

Mode usei only one Line Feed

(1/72*

) to insure full coverage

of

the

paper.

Control Codes

Before

investigating

the various print modes, consider

how the

computer

communicates with

the Printer.

All

information

is sent to the Printer as numbers between

and 155

decimal

(OO-FF

Tor

you

hexadecimal

fans). The Printer interprets these numbers

accord-

ing

to

the American

Standard

Code for

Information Interchange,

commonly

referred tq as

the ASCII

code. (See

Appendix

C for a list Df ASCII codes,)

Most numbers

tor

codes)

are printed

as letters, numbers,

or

symbols.

However,

the numbers 0-31, as

well

as some special sequences

of

code

numbers,

are used

td

control

various functions

of

the

Primer,

These Control Codes allow you in

change character sets, select print modes,

underline,

etc.

The Control Codes have differed! meanings, dEjwrulmg nn

thp

air

rem

prim

mode. If a Code is nr>t

recognized

by the Printer, it is

printed

as X. The next

few

sections demonstrate how

some of

the Control Codes

activate various

Primer fu Actions. Read these

sections

carefully.

17

Sending

Control Codes

from BASIC

Some

Printer

features are

Activated

by a single code,

but

many functions

require

a

seqiipnw of

(nn nr mnre cndes. Mnsl multiple cnde sequences becin with

decimal

27 (referred to

as the ESCapc code}. The ESC

code

;voiifies ihe Printer

lhal a special sequence

is on its

way. The next code(s} scot

determines

which

Primer

feature is selected. In BASIC, use CHRS(

)

IO

iend

Lhestr codes to the

Printer.

Note: This section will use

llie

cummanU

LPRINT

lu

examples thai

send codes

to

the Primer, If

you're

using a Tandy

Color Computer,

substitute

PRINT

#

-2,

for

LPRINT.

For

instance, set

up

the

DMP-105 as described

earlier and enter BASIC iti the

normal

way.

Then type

the

following program;

Id

REM

£0

LF'R

INT "DATA"

;CHR*(27J

|CHR*( 28)

f

"

PROCESSING*

30 LPRIMT'MIODE"

arid

HI

N

it.

Roll the

paper

forward and

look

at

the

results. The word

MOUK

primed over

part of DATA PROCESSING.

Whv?

The codes CHRH27)

and

CHRS(2S) arc

the guilty parries. Take a

quiet

look at

Append!* A. Tiiis

chart

shows the vari-

ous code

sequences

understood by the DMP-105.

The Control Code sequence

CNR$(27V;Cl]R£(2B}

m«ns change lh«

forward

lirw

feed **>

half in normal

distance.

Character

Printing Mode

Line

Peed

commands arc not executed

immediately,

The

(27 28)

sequence

didn't

cause a Half For

waul

Lint Feed mail uftej (lie

fint

line was printed. The *cl

Line

Feed

pitch stays in effect

until

a

new Line Feed pilch is

designated,

Type:

LLlSldESl

Sure enough.

You

still have that

short

Line Feed,

Type:

LPRINT CHRS(27);CHRS<54) to

return

to normal Line

Feed

pitch.

Graphics Mode

18

Graphics

Mode is very

different

from the

Character

Printing Mode. For one

thing,

Graphics

Mode accepts only

one Lin*

Feed Cod*

— CHRJ

1

10).

This

Line Feed is

fixed at

7/72*.

Furthermore,

only a

few

of the

Character

Printing

Mode

feature* arc

available

in the Graphics

Mode.

Standard letters

and

sym-

bols, for

example,

are ignored by

the

Printer when it is

in Graphics Mode, in-

stead,

numeric

data from 128 so 255 is

translated

inlo

dot patterns for the

Print

He«d

This lei* yon

produce

high- resolution sraphic

print-outs of

charts,

logos,

etc.

For a

quick

tnnt ai This Mode in action, change our

test

prOKram to:

113

LPRINT

CHR*U8> i

2©

FOR

I«128

TO

235

30

LPRINT

CHR4CI3-

40

NEXTsLF'RINT

CHR*<30Jl

and RUN

[he program.

CHR$(lg) puts the DM M05 into Graphics Mode. The [lumbers 12S through

255 are interpreted as dot patterns.

Type: LPRINf

CKR*i3fiU

SSKS)

fo

return the

Printer

10 CP

Mode

Try

LLISTing the program to be

sure

you're

not

stuck

in Graphic*

land.

Selecting a Print Mode

Table 4 summarizes the Control Codes required to

move from

one

mode to

another.

Table 4.

Control

Codes foi Changing Modes

tf

you're

In:

flftd

wam

,0

Send

a CHRS(

):

(Dsc)

(He>)

CP

Graphics

Graphics CP

18 12

30 IE

Hints and Tips About Print Modes...

Charader Primin

a

Mfitli?

All commands

which

determine Li

tie

Peed pilch arc stored in the Printer's

memory. They

are

nor executed

until a

LF

code

(10 Dec. or 138 Dec.) is

received,

Then, ihe paper

advances

according Id the pitch 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

in ode.

Graphics Mnde

•

Only

one

Line

Few)

Code

(10 Dec.1

is

acceptable. The LF Code causes the

paper io

move

T/72"

forward.

Mo oilier pilch ii allowed.

•

Decimal numbers

138-255

senl

via CHH.S

in BASIC arc interpreted as pin fir-

tat

patterns for the Prim Head.

•

Only 3 few code sequences are recognized in Graphics Mode.

19

4/Print

Font

Stvles

and Character

Widths

The DMP-105 has two distinct

prim

(character) font styles:

•

Standard

•

Graphic

Characters

Each

font

style

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 ihe way individual

characters are created within

the matrix.

The horizontal dm positions overlap;

vertical

ones don't.

Table

5.

Character

Widths

and D*ntltl«

Font

Style

Matrix Size Pitch

Standard 9x7

Normal

10 CPI/Elongated

5

CPI

Compressec

12

CPI/Elongated

6 CPI

Condensed

16.7

CPHEIangatecJ

8.35 CPI

Block

6xfl Normal

10CP*

Graphics

Compressed 12

CPI

Condensed 16.7

CPI

Table

5

shows that

there

are three basic pitches.

*

Normal

*

Compressed

*

Condensed

When

character

pitch is chained Ifur example frnn

Normal to Condense*)).

Ihe

data in the hulfer is

prinlrd,

some dot space is added,

urul

I ben printing wj|]

continue in

the

current

line with the

new

character

style.

Selecting

Font Styles

Character styles are

selected

by control Codes

from

your

computer

(Lfe.via

sott-

ware) during

Operation.

Chaiactci stylus stay

in effect until another

style

Is selected. Even

entering

Graphics Mode does

not change

the font. The

DMP-105

returns to

the

Jo.sC ac-

tive

font on leaving the Graphics

Mode.

Table

6

is

a summary of the Character

Style change

commands:

21

Table 6. Character Style Change Commands

(D

«f

ndaCHR

'<

u

»-**

27 19

IB 13 Normal

27 23

IB 17 Compresswd

27 ao

1B 14 Condensed

27 14 1B OE

Start

Elongation

27 15 IB OF End

Elongation

£7 31 TB

1F Start Bold

27 32

16

20

End Bold

Standard Character Font

Style

The

Standard character

set

ii

primed in

a 9x7

dot matrix

(9

dots wide by

7

dais high).

Each of the Standard characters can be printed

in three main character widths:

»

Normal 1 1> CtiaracreTS Per Inch (CP1)

•

Compressed 12 CP1

•

Condensed 16.7CPI

Each of these

widths can

be

elongated (double-width),

which gives

half

as many

characters

per

inch

and a

total

of six different print

widths.

You can get a better

feel for

the

different available print widths by

printing

a

few sample

lints. Tjpe in this program:

mem

mm

lid F*

1

^"

STANDARD

'"

120

N-l

1

?:

W*=" NQRI1AL

"sGOSUB

£4£

13E

f+*23:

U*="ELITE

*:GOSUB

240

140

N**2i**

WW=b"

CONDENSED

,,

:flOftu'ft

?4Pi

£30

LPRIIMT

CHR»<27>iCHR*<

19)sSTOP

240 LPRIMT CHR*(

27

>

?CHR*<N)

;F*i

"CHARACTERS

•

!

W*

;"

DENSITY"

250

RtTURN

and

RUN it.

The subruuliite in line

240

sends the

requited

Control

Codes to the DM

P-

1 03.

Line 230 returns to

Normal

character width and

.stops

program execution.

Graphics

Characters

The .second character set is a 6x6 dot-matrix

character

set used for Block

Graphics

printing. The characters can be Not

rival

10

CP1 width. Compressed 12

CPI,

or

Condensed

16.7

CPI,

This

set is

not

fully compatible

with

the

Kreen

graphics of most

computer*; it is n

unique

character set,

A 6x6 dot-ma

[rift

character set is available in Normal

10

or

5

CPI, Compressed

12 or 6

CPI

h

and

Condensed

16.7

or S.3 CPl

character conditions.

22

To see how the

various

character widths affect The

Graphics characters,

add:

L90

N^lVi W*="NORMAL

"

:F*^ "GRAPHIC

":

LPRINT

200 50SJB 240:GOSU£ 260
210

N™23«

Uf*= "COMPRESSED

'"

:

Q03UB

2:40s

QOSUB 260

220

N=20: W*=" CONDENSED

"

= G05UK

240=

G05UE 263

260 FOR

1=224

TO

254

:L PR INT CHR* < I )

;

J NEXT I

270 LPRINT: RETURN

and RUN the- program.

Since the normal line-to-lfne

spacing

is

1/6"

or 12 dots high and the

Graphics

characters are 6 dots high,

we

can create continuous

vertical

graphics by using

the Half Forward Line Feed (CHR$(2^);CHR50fl)). Add these lines to the

program:

10

LPRINT CHR*f 27 J ;CHR*<2B)

i

20 FOR R=l TO 3

30

FOR Ol

TO 7

40 READ N: LPRINT CHRMN>i
50 NEXT

CS LPRINT

&0 NEXT H-

LPRINT

CHR*<

21 M CHR* 1 34

)

;

70 DATA 241,243,241,224,241*243,241

SB DATA 224,244,241,241

,

241

.,24*?,

224

90

DATA 241,

248,241,224,241,24b, 241

and RUN

it.

When you've printed

out

the

results,

delete

lints 10 through 90,

Wrap-Around

The

DMP-105

is a dot-addressable Printer. Therefore, line

length

is not

deler-

mincd by the lumber of characters, but

by

the number

of dou-per-line. By

counting

dot columns,

a combination of different font styles, including

standard

ami r-SmigHirH, nn

bf prinieH

on

each line. The numbers of

addressable

dots-

per-line in

the Character

Printing

Mode is:

•

Normal

-%0

•

Compressed

=1

152

•

Condensed-

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

ii printed from the start of

the nexl

Jine.

This ig

called

wrap-around.

Elongated Characters

Any

of

the

character font styles can be elongated

to

twice

their

normal width.

[able

7* Elongated Print

"fl

Sand

CHRS(

):

(Dec)

(Hex}

To:

27

14

IB 0E

27

15 IB

OF

Start Elongation

End

Elongation

23

The start

(27 14)

and end

(27

13)

codes for

Elongated

charades may be en-

tered

any number of times

with

in a line and can be used in every mode.

You

can easily

elongate the character* in the current

program.

Change:

100 LFRINT CHR*<27> (CHRt(iA)

230

LFRINT

CHR*<27>t€Hft»<

1<?)

;CHR*<27)

iCHR*U3)

:£TOP

and

RUN the piogram.

Bold

Characters

Bold characters

are

implemented in much the

same

way as

Elongated

characters.

Table 8. Bold Printing

Send CHRS(

);

<D»C} {H«X)

lo-

27 31 1B 1F Slan

Sold

Printing

27 32

ib

20 End Bold

Printing

Bold characters

start

when

you send

a

CHR$(27);CHM(31)

and

stop

when you

send a CH RS(27);CHR$(32),

When a

(27 31)

code sequence is received, (he DMP-10S prints the current

buffer contents; then it resumes Bold character

printing from the

nest

character

received,

Bold characters can be added to the current program by changing Lines;

100

LPRINT CBR*<27)

;CHR*C31>

230

LPRlNT

OIR*<27> sCHR*(19)

i

CWSt*

C27 >

$

CHR* C.

32

>

:BT0F>

Now RUN the program.

Mixing Bold and Elongated

Bold and Elongated

characters

cannot be active at the same time. The first code

(cither Bold or

Elongated)

to he

r«rr*iv*ri and

activated

will tak? precedence. The

DM

P-

105 then simply ignores ihe

second

code.

24

5/General

Control

Codes

Line

Feed

Codes (LF)

When

a

LF

(ASCII

10)

code is received by

the

DMP-105,

all data

in the Printer

buffcr is printed followed

by a Line Feed. Unless you idl it otherwise, the

DMP-105

uses

1/6'

Forward Line

Feed

when

advancing

paper.

Pitch settings are sent to the DMP-105 in

a

two-code

sequence. First, a Control

Code

27

is

sent

(CHRH27)).

This tells the DMP-105 that

a special code se-

quence will follow,

l he next number determines

the

specific

pitch. These Con-

trol

Codes are listed in Table 9.

Table 9. Line

Feed

Control

Codes

Send

CHRSJ

):

(Dec)

(Hex)

To:

27 28 1B

1C

27

54

1B 36

27 56 1B 38

1/2 Forward

LF (1/12*)

Foil

Forward

LF(1/6*)

3/4

Forward LF(1/B*}

Hints and Tips

on Line Feed.....

•

In

the

Character Printing Modi;,

codes are

stored in Ihe Printer buffer.

They

are not activated

until

a

LF

code is icnt.

•

Line

Feed Pitch

codes

have

no effect in (he Graphics Mnde.

The

Line Feed is

set at

7/72"

forward.

Special

Line Feed Codes

There arc

twv

n/72*

Forward

Line

Feed

code*

that

oi>cj*le in different ways;

one

is

for

execution

and the other is for setting.

Table

10.

Special

Line Feed Control

Codes

Sand CHR$(

):

(Dec)

(Hex}

To-

27 90

n 1B5A n

n/72* Forward Line Feed

Execution

27 91

n IB

5B n Wf2" Forward Line i-eso

set

n/72* Forward Line

Feed Execution:

Thi* code is

effective

in both CP

and

Graphics.

Modes.

25

When d

CHRS(27);CHRS(90);CKKS(n)

is

received

by the

DMP-105.

all

data

in Hie

Printer

buffer

b

printed followed by the LF code. The Forward Line

Feed pi ieh is determined

by

the

value

n

between 0-255

For example, if n is set to 12. erne full Line Feed will be carried out

because

one full Line

Feed

i»

12/72'

(I/O').

rr/72* Forward Line Feed Set:

This code is similar tu the abuve code c\uepl Lhe liming to

Luc executed-

It is

effective only in CP Mode.

When a CHR^I^CHRSCSlj.CHRSdi) is

tettincd

U> the

DMP-105, no Line

Feed

occurs

but it is

stored in

the

Printer buffer.

The

r/72"

Forward Line Feed will bs executed, with the reception of

the Line

Feed

code

(LF= 10 or I3SL

n is a value

between

0-127.

Carriage Return (CR)

A CR

(13

or

14

1)

code

tells

the

Printer to prim the current buffer contents, and

then performs either a

Carriage

Return

followedbya Line Feed or a Carriage

Return

only, depending upon the

following New Line Control Code

setting.

Table 11. New Line

Control

Codes

Send CHR»(

>:

_

<Dse) (H**) '

D"

27

21

IB

15

CR-CFSet

27

22 1B

IS

CR»CH+LF<NLJStt

•

When a CR (J 3 or

141)

Code is

received

by

the

DMP-105

with

a

CHRS(27);CHR£{2I)

already

received,

qnly

a

Carriage Return it

performed

af-

ter

printing the butter.

•

When a CR Code is received with a

CHRI{27>;CHR$(22)

already

received,

a

Carriage Rtnirn fallowed by a Line Feed (NL) is carried out,

•

At power ON, the Primer is set

io New

Line

mode.

Ignored or

Undefined

Codes

Codes

that are

unusable or

undefined

in

a

given mode are either ignored

or

printed

wifh the

symbol X whtch represent* an

invalid

code.

Tit

ere axe several reasons why a

code

may be unusable in a

certain

mode,

licdundant eodps

that don"t change

tite

current

Winter statue are usually ig-

nored.

For example, if the

Printer

is in

Graphics Mode,

sending

a

CHRSIJS)

(used to enter Graphics Mude) is useless. And

there are many

ASCII

control

codes m

the

range to Jl that the DMP-105

simply doesn'r

recognize.

ASCII

0,

for example, is not

used

in

either

prim mode.

The

following

summarizes the undefined codes:

26

Table

12. DMP-10& Ignored Control Codes

Both Modes'

•

Out oF range on

repeat

sequence,

»

Out

oF range on

posrtiorsing sequence.

•

Redundant code's

that don'l change the current printer statjs.

For ax

ample,

if you send a.

CHR${14)

when underline is already set

CPMode'

t

1, 127,

2&5

Graphics

Mode:

All COdea

in the range

0-127

are

ignored,

except

(10), (13),

{30},

(27

14),

(27

15),

(77

3fl n},

(?7

ifi

nf n2> and

(28

m nZ)

Codes

printed

as X

CP Mode only:

•

All

codes

from

0-31

and

128-159,

except the

active function

Codes or the

above

ignored

codes.

AM

codes between

192-223.

DMH-105

Butter

Operation

The DMP-105*s

aUiliij lo

tempuiaijly sluie

data

is oiie uf its main advantages

over

a

typewriter. Cedes sent Lo a typewriter (i.e., keys pressed) are transferred

immediately

to

the

paper. Codes

sent

ta a Primer are not printed immediately;

they are stored in a separate

section

of memory in

the

Printct called the buffer.

When Lite buffer fills, or certain codes are

received

(i.e., LF

or CR)

T

the

buffeT

is

emptied and

all data is

then printed on the

paper.

What happen; after the

buffer data 5s printed depends on the

circumstances.

En

some

cases,

printing

continues on the

same line; in others, the Print Head is moved 10 a different

position relative

to

the paper.

in the CP Mode, commands for changing prim fonts, Line Feed, etc., can be

stored

in

the

butter to take

effect

when

the

data is dumped

to paper.

Understanding how the buffer works is important for those

who

wish Lo gain

full control of the DMP-10*.

Hints and lips tin (h? DMP-105

Buffer....

For CP and Cmphics Mtides

•

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.

If different

character

widths have

been used on the

same

line,

the last charac-

ter

added

may exceed the dot count. The buffer is

printed without this

Last

character.

•

The Carriage Return

tCR-

13 decimal) code automatically

activate!

printing

(assuming

at

least one

character

code

is already id the buffer).

The Line Feed (LF=I0) code

automatical!

V activates printing, and the

Print

Head is positioned

at

the start of

ihe next

prim line.

•

If the computer delays more

than

a second before sending

the next

print code,

the

buffer

is printed.

Printing confirmed

from Hie current pusiliun.

•

The Head Positioning sequence

(27

16

n]

n3j prints the buffer.

Printing

continues in the current line

at the

dot

address specified

by

the

(27

16)

command.

•

When

the buffer is full,

the

buffer

is printed. Printing

continues

from

the cur-

rent rMstrtfin

27

CP Mi>dc only

•

If a

cJuraetet

<ttt

of

different

dol density \s

Mrleaed.

Hit data in the

buffer

Is

primed.

Codes

for

changing character

sets

are:

(27

19).

(27

20) ,

and

(27

23),

Priming continues

in the current line with

the

new

character style

after adding

some dot

space.

•

Dot

graphics

printing continues

from

the current character

position.

- When

it

start

Bold

or end Bold is

received,

the buffer is

printed.

Bold printing

continues from

the

current character position.

*

Sinre (he buffer

capacity

is small, if you frequently

use

the

Underline, and/or

Elongated features,

the

buffer may be printed

before the contents

exceed

the

capacity

for one line.

Printing

will continue from

the

current character po-

sition.

*

If a CR

=

CR feature

has

been selected, reception of

the Carriage

Return

(CR

=

13)

code

causes

the buffer contents to be

primed

Tallowed by

a Carnage

Return, and

the

ne«fi full buffer will

overprint

on the current line.

If CR

=

CR

+Lr

r

(NL> has been selected, it will

cause

the buffer contents to

be

printed followed by

a

New

Line (CR and

LF).

Printing will resume at

the start

of

the

nest print line,

Graphics Vhirtp nnlv

When

the End

Graphics

Mude command

is

received,

the buffer is printed.

The

Primer returns to

the

CP Mode

and printing

continues

in

the same line from

the current, prim position.

Note: Repeat data can cause a

buffer

full

or

overflow

condition,

a* well as

single characters.

Z8

6/Character Printing Mode

Repeat Printing

The DMF-105

provides

a.

built-in repeat capability.

You

can

use

it to

repeat

a

single character code up to 255 times.

It'* stunt

for

repealing graphic* code*.

underlining*

repealed block graphics, etc. The Repeat features use a three-coder

sequence:

•

CHRS(28}

The number of repetitions.

•

The code

to

be repeated.

Type

in Lhit new program i

10

LPRINT

CUR*

(30):

REM To be sure in

character print

mode

20 FOR

1=1

TO

S

3D LPRINT

CHR»

( 2B

ii CHR*

CI

>?CHR*( 1+49)1

40 NEXT I

Now RUN trie

program.

Note: Depending on the computer, chit second

parameter

(number

of repeti-

tions) is interpreted differently.

For example,

CHRS(SJ)

may be interpreted

as

the

TAB command, causing the print tread in move no

the nex<

TAB

position instead of printing characters

9

lime*.

Refer to the Owner's

manual

of your computer for derails.

Underline Printing

If you need

to underline any test in Character Printing Mode,

send the

DM

P-

105

a

CHR$(I5).

All text that follows this code will be underlined

until

you

send

o CHRI(I4} which stops

underlining,

Underline is

accomplished by (wo pass

printing;

this

means

the second pass cre-

ates a conrir-uim'.

unbroken

lirit

after the firat pais

print*

the

characters to be

underlined.

If a Print Head Pc*sirLabing

code

is

received

while the Printer is

in an

underline-

Selected condition, the underline

is

not printed between the home position

(left-

most

priming position; and

the dot

column

position designated by

the

Print

Head

Positioning code.

If you

enter

Graphics

Mode while

the

Printer

is

in an underline-selected condi-

tion, when

you return to the

Character

Printing. Mode, the designation

of un-

derline

is

the

same as ii

was

before

ciiteririg

Graphics Mode.

Tabln

13.

Underline Printing

Sand CHRS(

);

(Dec}

(Hex)

Tp:

15

OF

Stall

Underline

14

OE

Stop

Underline

Z9

For

example,

type in this short program:

10 LPRINT CHft*{30J3»R£H

CHARACTER

PRINTING

20 LPRINT CHIWMlSmREN

START

UNDERLINE

30

LPRINT

"LEEWAY

BUSINESS

PRODUCTS

"

^S LPRINT CHRf U

4 )

5

=

REM

STOP

UNDERLINE

50

LPRINT

"GIVES GOOD

SERVICE"

In this example, line 20 turns on the

underline

and

the

first

line of

tort

(

LEE

-

JijAVULU

SINEBS

FRQDJJC

TS_)

is underlined.

Line 40 turns

the

underline

Off

and

£lvE£J

G0*:O SERVICE is not

underlined.

Print

Mead Positioning

In any mode, \ou

tan

position the

Print

Head to a specific

dot

position.

Every

other

Print

Head position h

accessible

through the position sequence. The

characters stored in ROM

can

use

the

half

step

positions

—

ymt

can'r.

Using

the

Normal character sets

(10

CPi), there are 960 dot positions per line,

but nnly half [4RN) are

atce^iblc

hy you

Thi* *s*Tne

i* rriip fnr

CfiTrvpresAtMi and

Condensed characters.

Table 14.

DMP-105

Print Head Positioning

Character

Width

Oots-per-Line Available

Columns

Normal

Comprised

Condensed

96C

1152

1600

480

576
800

Elongated

characters use [he

same dot columns,

even

though

the

characters are

printed

twice

as

wide.

Even if underline is designated, underline dots

not

appear between the home po-

sition

(i

he

leftmost printing

position)

and the position

designated

by the Prim

Head Positioning code.

To position the Print Head to a specific position, send 3

(27

1

6),

then

two

num-

ber; (we'll

call

them

ni and riJ) that Specify

the

desired position. In

Other

words,

just follow this gene-rat

procedure;

1.

Send

a

Control

Code which specifics

the

Character

set

(Normal, Condensed,

Compressed),

2. S*nd a CHRS(27);CHKS{I6) 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 littk more

complicated and

will be explained shortly. For now, just

understand that you simply tell the Printer which dul

luliuim

yuu

want.

1U

4, Tell the Printer what you want to print.

When you want to spent y a dot column

where

printing is to begin, you must

first us*

CHRS

to

send the

(27

l(?)

code.

Follow this with another two-code se-

quence which

sp*wifie*

th("

prrcifinn Fnr

in^Tum:^

L

P Rl NT CHRS(27):CH RS< 1

6)

;CHRS(n I );CH RS(n2>

where

nl

is a value between

0-3

and n2 is a

value between

0-25?.

Table 15. Print Head

Positioning

Ifyouwkihti,

nlimnttai:

n2 must he:

specify dot column:

0-255 0-255

256-511

1

0-255

512-707 2

0-255

76H-799

3 3t

Renenbtr! Normal priming, allows vou to access dot columns

up to

479

(nl

=

1,

n2

=

223

J;

Comprised printing

allows yon to

access dot columns up to 575

(ill

=

2,

n2

=

63};

Condensed printing

allows

you

to

access up to

799

(nl

=

3,

n2

-

31).

Why

two

numbers (nl

and

n2}7

The

maximum value

you can send to the

DM

P-

105 with one number Li

255,

and clearly you have

more

than

255 dot

posi-

tions

available,

Those of yoy who

are Taju of blnaij math

will

recognize that the DMP-105 is

interpreting, these two numbers as a single 1 0-bit

(KO)

—

b(9»

value.

The

two

lower

bits

of

nJ

are used

as

b(S) and b(9),

Nq)e:

Use

5-5"

wide

paper for

this

nest

example.

See if you can

print a character

starting in position

480

in Normal

density, nl

=

1

gives

256 of those dons, and 480-256 =

224 is Ihe difference

to he sew

as

n2. Type:

10 LPRINT CHR*(27> ;CHR*(16> ;CHR*<1 KCHR*(224>

;'

+

"

and

RUN

the pio&iaut.

Whoops!

The asterisk printed aL the

left

edge

of

the

papet, Hmmm! Maybe you

need ly leave eiiuugli

room

fyi

I

lie

asterisk to fit on the end of [he line. Try;

10 LFRTF^T CHR*<27) ;CHR*<16>

;CHfl*U

J

* CHRS (218)

;"*

and

RUN

the

program.

That's

better. It fits nicety 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 both print modes,

its

potential

is

greatest iu OrupiiR's Mude.

31

If you want to make a real

mess oit

your paper, try:

10 LPfllNT ClfR*<27

)

i

CHR* < 20

M

20 FOR

1=1

TO 100

30 LPRINT

CH«*<27>lCHR*U6) tCHR**

J) iCHH*tl3B4-I*5IN( 1/3) )

5

40 LFRINT

"'*"

50 NEXT I

Get out of the double-width modi?

and

then

RUN

the program.

Printing

Directions

In

the Character Priming

Mode, either bt- or unidirectional printing

is

selecta-

ble.

At

power

ON, bidirectional printing h selected initially. If you need to

sflMf

unidirectional printing, send a

(27

B5

1):

and for bidirectional

printing,

send a (27 S5

0).

Table

IE. Printing Direction Control Codes

Send

(D«)

CHRS(

>:

(H«t)

To:

27 B5 1

27

B5

IB

55 1

1B 55

Select Unidirectional
Select Bidirectional

52

7/Graphics Mode

In

Graphics

Mods, you no longer have

pre-definecs

characters

at

your disposal

.

You are

responsible for

the

positioning and the action of the

Print Head.

The DMP-105 allows you to have direct, program

mabfc

contra!

over all of the

available

graphic

dots.

How many Mross the

paper

addressable

dot

columns are There

1

? That

varies,

de-

pending on the character style you're using-

See

Table

IV.

Table 17.

DMP-105

Print Head Positioning

Character

Style

Available Dot Columns

Mormal

480

Compressed

576

Condensed 000

How many up and dawn (dnt columns)

addressable

dots

are there?

Tbe

answer

BtT.

Thai means you can specify any one of up to 5.GW individual

dots

(7

x

S00

=

5600).

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 Cocte

which

specifies

ihe

character set {Normal, Condensed,

Compressed),

2. Send & CHR$(18) to put the DMP-105 into Graphics Mode.

3.

Send

a CHR$(27);CHR$(16) to tell the Primer you want to position the Print

Head to print a specific -lot

.

4.

Tell

the Printer in which dot column you wish to

print.

This is a

little

more

complicated

and will be explained shortly. For now,

just

understand (hat

you simply lell the Printer

which

dot

column

you

want.

5.

Tell

the

Printer

what

you want to prim. You

can

do ihis

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

where printing

is

to

bp^in,

yon must

first

use

CHRS to

send the

(27

]6)

code. Follow this

with

another

two-code

se-

quence

which

specifies

the position,

for instance:

LPRlNTCHRS(27j;CHR$<16>;CHRSinl)tCHRJ(n2)

Where

nl is a value between

0-3

and n? is a vahir between n>2^5

33

Table 18. Graphic

Dot

Positioning

If you wish to specify

n1 muat

m

a2 musl ^

dot

column:

0-255 0-2&5

256 S11

1 a25S

512-767

2

0-255

768-799

3

f>31

Rememhtr? Norma] graphic priming allows

yen

its access dot

columns

up to

470.

(nl

=

I, n2 =

223};

Compressed graphic printing allows you to access dot

columns up

to

573

(nl

=

2.

n2

=

63);

Condensed graphit printing allows you

to

access

up to

799

in

J

=

J, n2

=

iJ>.

Even though

dot columns

gteater

lhati 25S eaist, you cannot

send values

greater

than 235. Thai Is, CHK$<{4tiO>

Is

not allowed

—

yon must break it into a two-

byte

value,

For

instance, to draw a

vertical

bar at dot column

144,

try this, program;

J0

LFRINT CHR*< 181

213 LPRINT CHRM27) ?CHR*( 16 > iCHR*(0)

;CHR*U.44) (CHNmtUS:^

(Don't worry, that last CHRJ(255) will be discussed shortly.)

En line

10,

CHR$(18)

puts

the

Printer into Graphics Mode and, in line 20,

CHRS(27);CHRJ(16) tells it to get ready to position the Print Head. (Nole That

CHKS(0)

is

necessary

r

>

Try this line so print a

vertical

bar at the right.most available dot column

—

799.

10

LPRINT

CHR*<27)

jCHR*(20> ;CHR*M18> !CHR*<27> iCHRSUt)

i

CHR*(3> ;CHR*<31 )

\

CHK*(-^53 >

i

What

happens is:

*

CHRJ(27);CHR$(2G) puts the DMP 105 into the Condensed character

set.

*

CHRS(18) puts the Printer

into

Graph

res Mode.

*

CHRI(27>;CHRJ(16)

tells the DMP- 105 to get ready to position the Print

Head.

*

CHR.I(3) tsll*

T

he

Printer

[bat

rh* prwiiinn will he grearer than 768.

*

CHRSfll) specifies the last

available dot column.

Note:

If you used

CHMS02}

in this Hue

instead

Of

CHRS<31),

the

HMP-lfH

would wrap-around to the first dot column in the next line.

Printing Graphics Patterns

By now, you should be adept at position

ins

'he

Print

Head,

But you also need

to

be

able to tell the DMP-10S

what

to prim

once the Head is positioned.

Remember

that we said there were

7 vertical

dots

in each

dot column. You can

print

any

or

all

of these dots in any

combination

you want.

LooV back at

rhe

sample programs used when we talked

about

Print

Head posi-

tioning. Do you

remember the last part of the program

line (CHR${255)) which

,

j

always printed

a

vertical bar? That's an

example of

all V dots being

printed

at

"

once.

Try printing just the top dot of that last dot column

(799):

10

LFRINT CHR*<27) iCHR*(2BMCHR*CIB) jCHR*C27>

fCHR*l

16>

i

CHR*<3) ;CHR*(3i)

;CHR*<

129)

!

How does CHRS(129) prim just

the

top dot?

Even though the 7 dots in a dot column

are

in a

vertical

row, they are no:

num-

bered ttxjuenliaLly down from I to 7. Table 19 describes

the

numbering sy.i[i.'m

you must use with the DMP-105 when specifying an individual dot:

Table

19

DMP-105

Addressable

Dot

Numbering System

_ _

Number You Must Use

00t

* :

°

0t:

To Print

the

Dot:

1 .

139

2

,

130

4

(

13?

8 139

16 144

32

160

64

19?

For

instance,

you've

already seen

how to print the top dot in

the

column, but

to

prim

the

bottom

dot,

change the program line

to:

10

LPR1MT

CHR*(27?

VCHR*(20)lCHR*(18

3

!CKR*t27)

;CHR*C16)

;

CHR*

C3> 1 CHR* ( 3 1 > 5 CHR* ( 192

)

;

This is

fine

if you want to prim an individual

dot,

bul

how

do you prinL a com-

bination

of dots?

Thai's

actually

quite simple, too,

1. Specify the Drsr

*

(1-6*,

see T»h|p

19)

thai represents

the individual

dots you

want to print.

2. Add ihfiiir individual

Dot

Hf's Together.

1.

Add

the

sum of

the

combined Dot #'s to 128.

For example, if you

want

to

print

the

first dot (Dot # J), the

fourth

dot {Dot

#S), and the East dot (Dot

#64),

add

them

together: 1 + 8 + 64

=

73. Then

add the sum

U3)

to 123; 73

+

128

=

201.

Use 201 as the addressable dot

pat-

tern i ei I he form CHRS(20I):

IE LPRIMT CHR* <

27

K CHR* (20)

lGHR*UG> tCHff#f27] ;CHR*<1£)

I

CH«*

(

3

)

*

CHR*

( 3 1 >

;

CHR*

( 2lfl I )

\

Remember hqw

CHRH255} printed a solid

(all

dots printed)

vertical

bar. Try

out lIic

formula

on [han

I

+

2 +

4

+ 8 + 16

*

31 + 64

=

127 + 128

-

255

The

following

sample: program line will

print a

box

with a line through rhe.

middle:

153 i-TRlNT

CMR*<27>;CHR*<2B)iCHR*via);CHR*(27);CHR*f

16)i

CHR* (3)

i

CHR*

(31) ; CHR*<

255

M CHR* (21 0) jCHRitC2G|l )

5 CHR* (201

}

J

CHR4(ZQl);CMR*C255)f

1S

Now

to flex our muscles.

Type

In NEW

(EHRg)

10 LPRINT

CHR*t IB)

£0

D-l

SN-12B

30

FOR

1=1

TQ

20=S=-S

40 FOR JMB TO 6

£J0

IF

S<0 THEN N=N+2M*-J>

ELSE N=N-2

A

J

90

LPRINT CHRt(N)

i

IViVi

NEXT JSNEXT

I

120 LPRINT CHR*£30>

RUN

i he program. Be picpaied

feu

a

pwun;;

il (iifccN

lime lo fill l he print

buffer.

This

program

alternately udda and ^uImiuli*

puwvn

uf

iwu

iu llie current cudc

pattern stored in the

variable

N, The net effect k to add

or

remove

a single dot

from the preceding

dot

pattern.

Line

Feed

Iri

Graphics

Mode, it is

assumed

that you want to

print tows

of graphics one

lisht ufter unuther, each

7

dois

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

un-

wanted

space between

lines.

Modify Ihe current program

to

demonstrate

[his fixed

Line Feed.

Add

ur

change;

20 S=1*N=128

50 IF K=i THEN 80
£0 IF 5<0 THEN N=N+2*J ELSE N~N

-2'-

< &-J)

70

tniJTQ

<?0

110

LPRINTSNEXT

K

end

RUN the program.

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 nutCS the Line Teed between

passes.

Repeat Function

CHRS(28) will tell the DMP-105 to repeat it graphic

pattern

a

specified

number

of times.

The

format

for

(he

Repeal

Function is:

rpfxw

*vwft»

-+

number

nf

time*

">

n>pw>t * what fn

rpppnt

For instance, LPRINT

CHRS(28);CHRS(15|;CHRS[255)

will print the solid

vertical

hnr

15 times.

Change line 90 10:

9(3 LPRINT

CHR*t28*

|CHl*9t^)

jCHRSfN*

!

and

RUN

the

program.

36

Print Density

Horizontal dot

density

in Graphics Mode is the same as thai of the

character

width prior to entering Graphics Mode.

It' you have been using Standard font style and then enter Graphics Mode, reso-

lution

will

he

480

dot* pet

line;

if you

have

been

using

Compressed

character*

before entering Graphics. Mode, resolution will

be

576

dots perlineL if you

havr

been using Condensed characters, resolution will be S00 dots per line.

Add

to

the

current

sample program:

5

LPRINT

CHR*(27> 5 CHR*

(

23)

!

" COMPRESSED

CHARACTER

WIDTH";

and

RUN it.

Line 3 activates lilt; Compressed character set. Graphics arc then printed in

Compressed character density.

Leaving

Graphics

Mode

CHRS(JO) is used to exit Graphics

Mode.

It

returns

the DMP-105 to the CP

Mode, In addition, all the

previous

conditions, such as underline

and character

style, are restored. Change the sample

program

to:

90 LPRINT CHR*<N>?

1.30 LPRINT "STILL

IN

COMPRESSED MODE

"

and RUN

ii.

Sure

enough.

(he Compressed

mode is still

alive

and well,

Mixing

Modes on the

Same Line

The foci thai character

density is unaffected is the DM|

J

-lu5

moves

in and ou(

ot 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.

Freehand

Drawing

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 vwork

in draw-

ing figures

that

can be described by

a mathematical funetion. Freehand draw-

ings,

on

the

other

hand, require

translating

the figure into a matrix of dots,

iht-n

calculating

th* dot printing

combinations- for each Print

Head position.

Since

there

are

7

dots

available

for

graphics,

separate

the

matrix

into

rows

7

dots

high.

The numbers can

be

stored

in DATA

statements.

To conserve

memory

and typ-

ing time,

store

the

data as numbers from

io

127,

then

add

128

as

you

send

them to the

printer.

Enter these sample DA

J A lines:

NEW

OWES

12B

DATA

999

160

DATA

13,

12,

112,999

190

DATA

32,32, IB,

ia,B,

15,

???

710

DATA

16,16,8,2,4,4,2,2,1,1,999

The 999's

will

be used to signify

ihe

entt

of

g

line.

The

other numbers

are be-

tween and

127. Now for

the

program

to read the

numbers,

add 12fi,

then

send

them to the

Printer.

37

IB LPRINT CHR**i8>

2B

FOR

R=i TO 4

3B READ

NJIF

N=99?

THEN

80

40 LPRINT

CHR*<

12S+NM

iGOTO

30

B0 LPRINTrMEXT R

90

LPRINT CHR*<30>

100

LPRINT "DMP105"

Now

RUN the program.

Nt>[

much <o brag aboui yeT. Maybe

whai it needs

is to be

jazzed

up to

repeat

a

number

several

times. A good approach is

io

use negative numbers, to indicate

I he number of repetitions

followed

by the number to

be repeated.

Add;

120 DATA

17t--2,33,34,-4,66,6B,-4,4,-5,R,- 5,

16,-5,32,

-5,64,

999

130 DATA 46,96,90,72,68,66,33, 16,312,94,-7,

1*7,-5,

126

1D0 DATA 95,79,71,67,65,32,

16,©, 4,2,

1

t

-'i,B,3,7i

t

67

Don't RUN h yet!

In line 120, the

sequence

—

4.,

66

is used to mean four 6di-

66,

66,

£6,66-

You

must modify the program

to recognize the negative

numbers.

Change:

40 IF N>-0 THEN LPRINT CHRS < 128+N

>

!

i SOTO 30

50 READ M

60 LPRINT

CHR»(2S>iCHR*<-N>seHH*U26+MH

70 GOTO 30

and RUN the

program.

The figure

still doesn't look lilte much. Add trie

remaining

DATA lines

and

sec

what

you've been working on,

110

DATA

-7,

0,-2, 64,

-2,

96,

£0*

-2, 72,-2,-2,100,-1,

114,-2, 57

140 TADA

-5, 124,-2,

120,-3, 121,-2,

113,

-3-,

U4

t

9E,9G,

2,100

150 DATA

-2,

116, 92,

9,72,64,32,32, 16,30,

104,72,5,5,3

170

DATA 127*

-4*

64.

3,

-n*

2,

3,

-5,

13,-5,

3t,

-5,63,-6,

127

200 DATA

-5,0,-5,

1,-5,2,-3,4,-5,9,-5,

19,-5,30,-4,64,

127,32,32

RUN

the

program.

Now thafs

worth the

effort!

38

Appendix A/Control Code Summary

Code

Dae.

Hex

Character Printing

Mode

Graphics

Mode

Remarks

00

00

D

J

01

Ignored
Ignored

Ignored

Ignored

o

QA Executive Line Feed

or or {Execute LF in

138

8A accordance with information

latched}

7/72"

Una

Fee

(Executive) 8A

hex,:

Printing

data

„_^;."*

13 ut

141

00 ui 5D

Carriage

Return (When NL,

LF

pitch is latched one

)

Cbi ridge Return (Wlien NL,

LF

pitch Is

?#£'

per

line.)

80 hex-

Printing

data

NL/CF

Cude

Selectable

14

OE

OF

End

Underline

Ignored

15 Start Underline Ignored

18 12

Select Graphics Mode Ignored

27

14

27

15

27 16

nl

n2

27

21

27

22

27

23
27

23

27

31

27
32

27
54

1B

0E

in

OF

Start Elongation

End Elnngatinn

Start Elongation

Fnrf

Efongallon

1b

10

n1 n2

IB

13

Positioning

(3

pitches are

available.) (n1 , n2

indicate

dot position from Home

position.)

Positioning

(3

pitches

are

available.)

(n1, n2 indicate

dot position

irom

Home

position,}

nil , n2: Binary

value

***

Select

Standard

character -,...

Ignored

IB

14

1B

15

IB

16

Select

Condensed

character

SotCR

=

CR

(No motion}

Ignored

Ignored

1B

17

Set

CR

(No motion)

Select

Elite

character

LF

+ CH

(NL)

Ignored

Ignored

16
1C

~1B

1F

Set

Half

Forward

Line

Feed

(No

motion)

Stftri

Botd

Ignored

Ignored

.

-

-

-

;-.

18

20

18

36

End Bolo

Ignored

Set

Full

Forward.

Ignored

Line

Feed (No motion;

39

Code

Dee. Hex.

r

1

27

27
85

27

as

1

27

n

27

91

20

n1 n2

30

1B

55

1B
55

1

_

1B

5A

n

~1R

&B

n

1C

nl n2

1E

Character Priming

Mode

Graphics Mode Remarks

IB Set

3/4

Forward Ignored

3fi

Une

Feed (No motion)

Select

Bidirectional

Printing

Ignored

Select Unidirectional

Printing

n/72'

Forward

Line Feed

(Executive)

n/72"

Forward

Line Feed

(Executive)

flat

n/72" Forward

Line

Feed

fMr, mntlnnl

|

^.

J

Repeat Print Data

(Undefined Code is changed

to x)

Ignored

Repeat Print

Data (IF MSB-0.

Data

is

ignored-)

Other

Cedes in Func- Prints X

tirjn Area

(02

to 31

dec.)

(02

to

1F hex)

r

Ottwr Codes

in

Func-

Prints

X

tion Area

(128

to 159,

192

to

223 deo.)(aOto

9F,

CO

to

OF hex.)

End Graphics Mode

Ignored

(Priming

Data)

40

Appendix B/Interface

Parallel Interface

Interface Connector

Type

„

,,..,„,,..

,„.,.

36-Pin Receptacle

Model ...,.

„,„„.,„„

552742-1

or

equivalent

Manufacturer

„,,.

AMP

or

equivalent

Pin Assignment

is

p:

i

^^f

J-3

1-S

Signals

Signal

Pin

Name

of Signal

Signal

Pin

Name

of Signal

1

STROBE

19

V {Return for

1)

2

DATA 1

80 V (Return

for

2)

3 DATA 2

£1 V

(Return

tor

3)

4

DATA

3 22 V

(Return for

4)

5 DATA

4 23

V (Return tor

5)

6 DATA

B

24

V

(Return for

6)

7

DATA

6

ft V (Return for

7)

a

DATA

7

26 V (Return

tor

8)

9

DATA B

27

V

(Return

for

9)

10

ACK

?fl

V [Return for

10)

11

BUSY

29 V (Return for

11)

12

13

PE (Paper

Oirt)

HOST

30

31

V

NC

(Not

Connected)

14

V

32 FAULT (Printer

Error

Condition}

15

NC (Not Connected)

33 NC

(Not Connected)

16

V

34

NC

(Not

Connected)

17

CHASSIS

GROUND

35

NC

(Not Connecieo)

18

+

5

V

(80

mA

Maximum)

36 NC

^^^^^

(Not

Connected)

41

Parallel

Interface

Signals

DATA BIT UB

DATA

STRODE

BUSY

SUSY

ACK

Oys mir

)C

1

/"

'

I

Sui

mln

500xjs. mm.

Ojjs

mtn

Timing Diagram

DB1-DB8

—

Host Generated

Hftca Bus

DBinRfl rontam ASTH r^anti-icr

t\aia

information .

Data bil

levels

arc

positive

true

logic.

ACKNOWLEDGE

—

Printer ftenentted

The ACK signal is a

negative-going

signal which indicates, by the

rising edge.

that

the Primer is no longer IhjSj

BUSV

—

Printer

Generated

The BUSY

signal

goes

positive

to

indicate when Ihe

Printer

eanno: accept new

data from i hie Host,

at some Fault tunditiwi has

wmjr^d.

Timing is

illuiiratcd

in Ihe Timing

Diagram.

PAPER OUT

(PE)

—

Printer

Generated

The

paper out

signal

is a

posirive-

going pulse which

indicates,

thai the Printer is

out or na per

or thai the Printer is not

ready

to receive data,

BUSV

—

Primer Generated

The

BUSY

signal is rhe toxical

inverse

of BUSY

FAULT

—

Printer Genera If

d

The

FAULT

line

is

a nCKaiive-aoing

jieiial

that indicates

there is a

fault

condi-

tion present; i.e.,

paper

ovii, login fault, off-line

condition, or

other

mechanical

fault,

42

STROBE

—

Hosl Gtnerated

The STROBE signal

i& a

negative

going signal

which

indicate*,

by the rising

edge, tli

a: the

Host

sends

data to the Printer.

CHASSIS GROUND

This line is connected to the

chassis

oF

the

Primer.

5

V

—

Printer

Generated

This line is connected to the Pri

titer's

logic

+5

V

hoe.

Maximum supply current is SO mA.

Pa

rails) Interface

Receivers

end

Drivers

All I/O Signals are

TTL-compatible.

Receiver

9 mA ma*,

when

low

<J

T-n Primer

1 kO

+ SV

Driver

+ 5V

,:-

16 r*A win.

when lev

2.3

k|;

From Printer

Oprm

Cflliectdr

Note:

Print er-gcrieraied

signals,

BUSY,

FAULT,

PE, BUSY,

and ACK, have

a

12 kohm pull-up

resistor.

43

Serial

Interface

Serial Interface is selected

hy seKirijj

Function

Selection Switch I

to ON.

Trausmiauaa Rale is selected liuni two laies (GOO BPS and 2400

BP5)

by Func-

tion

Selection

Switch

2\

OFF designates 2400 QPS and

ON

designates

500

BPS.

Function Selection Switch 2 is. activated only In

a Serial Interface Condition.

General

Specifications of

Serial

Interface

Standard

Meet with

RS232C

Serial

Baud Rate

„.. WW or

2400

DPS Serial

Parily ... Non-parity

Buffer ,

.....«...* ... Up to

134

characters

Data Bit

.......,,.

, 9

SLart

Bit

.„.„..,.. I Space bit

Stop

Bit 1 or 2 Mark

bits

Signal Cable ,,., 15 m Mas.

Interface

Connector and Signal*

Type

4-Pin

DIN Jack

(Receptacle)

Model

, .

,,.

TLS 4640-Di A

or

equivalent

Manufacturer

HOSH1DEN CO., LTD. or

equivalent

Pin Assignment and Signals

Pin

No.

Signal

1

2

4

NS

BUSY

GWD(0

VJ

uaTa

DATA

—

To

Printer

Signals on this

circuit

are

generated

hy the Computet for tianmi'naitHi

uf data

to the Printer.

BUSY

—

From Printer

This

signal

indicates to the Computer

whether or

not

the Printer can accept

data.

The

OFF

condition

(low} indicates

that

the Printer is BUSY and cannot

accept

any

more data.

44

Interface Timing and Signal Level

DATA

BUSY

:':NU

—

tl

-

•

tl

*

ISPACE

-

LOGIC

Ql

Stop

VH

DATA

1

DATA7DATA CAT*

4

DATA

B

DATA

DATA

7

DATA

B

VL

3

stop

frj

_».

(MARK

-

LOGIC 1)

SPAUE

IKfcADV!

MARfcL

iBUSVi

-25

V < VL< -J

VfMARK}

Baud Rate tl

t2

600 8PS

2400 BPS

1.67

msec

0.4?

mswc

0,83

msec

0.21 msec

Remarks

on Serial

Interfacing

Conditions

• When

a Framing

ERROR

is deleted, the Printer

will

prim only

one N

data,

then

stop printing

until the data line

goes to

VL.

In Graphics Mode,

I hi* X

data is unprintable

code, so no printing will

be performed,

•

The Printer

checks only the

fii&t

ttop-biL and ignores the second

si op-bit when

a

two-stop-

bit condition

exists.

• When

a string of dal*

is

transmittal

to the Printer in Serial

Interfacing

Mode,

if each item of data is

trans

mi

tied

intermit

temly

(every

one

second

or more),

printing

will

be performed every

second,

45

Appendix

C/Character

Sets

The DMP-ID5 has 158 dot -matrix patterns in The

ROM (Read Only Memory

V

The

following

is n i able of the

Character

Codes.

Tlii printable- characters may be

classified

as follows.

•

Condensed

or

Con

Jens*

d

Elongated

ASCII

.„„., M

•

Compressed

or

European Symbol

..,.„„

32

Compressed Elongated Block Graphic

30

•

Standard Or
Standard Elongated

94

ASCII

Code

ASCII Character

Sots

Code Char.

Codt

Char.

CoC-a Cn*

Doc Hen Oca. Doc Htt ftrs

Ok. Max Ort.

32 20 40 (Spa™)

04

40

'DO

;b

M 60

140

V

33

21

41 1

es

41

-01

A

97

61

141 4

34

22 42

"

06

42

102

B

M

62 142

b

as

23 43 # 67

43

'03

C » 63

143

c

as

£4

44

* 66

+5

104

D 100

64

144

a

37

23 45 %

69 45

.

105

E

101

65

145

a

36

26

4C &

70

46 106

F 10?

fifi

146 r

39 27

47 71 47

107

G

109

67

147

40

28 50

(

73

48 116 H

104

6ft

ISO

h

41 29

51 >

73 49 111

1 105

69

151

i

42 ?A

sa 74

4A 112 J

106

6A

162

j

43

29

S3

h

75 46

113

K 107

OB 'KJ

k

44

ZC

54

,

76

4C

114

L

109

6C 154 I

4ft-

20

2E

55

—

77

40 115

M 109 6D

155 in

56

76 4E

116

N

110

ft£

156

n

47 2F

57

/

79

4F^

117

111 0F 157 Q

«

XI

BO

90 SO 129 P 112

70 160

P

49

31 01

1 61 51

121

Q 113

71

161

q

sn

32 62

2 «S 63

133

R

114 71

162

r

51

33 63 3

63 53 123

S

115

73

163

•

52

34 64 4

64
65

54

'

55

124

125

T

lift

74

'64

1

S3

35 65 5

U

117

75

165

.

54

36 e«

H 56

126

V

119

78

108

V

53

37 e-7 7

67

3/ 12/ w

IIS

I

77

1ft?

w

St 36 TO B

U 58 T30

X 120

73

170

X

57

39

71

A

ri m>

T3i

V

121

79

171

y

SB

3A 72

90

BA

132 z 12?

7A

172

z

59 LIB

73

91

69

133

I

123
124

76 173

60

ac

74 <

92 5C

134

\

7C

!74

t

61

30 75

=

93

5D

135

]

125

7D

175

i

fir

3:

76

Zj

94

5E 136

A

126

7h

176

S3 3F

77

1 9-i

5F 137

Note: The foil

owing

characters

descend by one dot:

Small

Utters

8,p,q,jr,j.

(Underline),:

47

32

European

Symbol

Code

Standard, Compressed

or

Condensed Character

Set

Cocm

1

Char

Doc. H*x

Oct.

1BC

»

240

H

161

A1

24f

Jl

162 A2

£4?

c

163

A3

£43

£

IH

*4 244

-

165

AS 245

M-

166

**

346

E

ie?

A?

£47

T

1€fl AS 250

t

169

AS

251

&

170

AA

252

•

171 AB

893

i

172

AC

254 %

173 AD Sfifi %

1

?4

AE

356

1*

175 £F 257

T

176 BO

HQ

V

177 B1 i'6

1

A

178 H2 2fl2

179

B3 263 U

1B0 S4

264

«

161

65

369

-

182

Ba

265

•

163

e? 267

1H Bfl 270 u

106

Bft 271

(1

186 BA

21t

TM

1»7 ea 273 4

iflfl

BC

274

u

1B9 ao 275

«

*9C Bt 27B

191

or

277

f

Notes: 1 The optimizer function allows the following: If a spacing

code

is

received,

the Carriage

moves

only the shortest

distance, and

the

action

will

tiifce place

without

unnecessary movement. This

saves,

prinrmfc

time. When

character

data

is sent

io

(he

Printer wiihin

a ontvsecond

interval, the

Printer automatically

stores

it until;

(1)

Function codes

are sent,

(2)

the

interval

is greater than one second. Printing is then

executed.

2 The tallowing characters descend by

pre dot,

c, ji,

§.

U,

/

43

30 Block Graphic

Code

Standard.

Compressed or

Condensed Set

Code <3i»r.

Cata

Char

Me.

u—

Oa D«. Hex

Gel.

224

eo 340

(Blanul 240

FO

380 r

225

E1

3-n

.

311 P1

361

—

?tt E2 342 242 F2

3*2

1

227 E3

343

*

243 F3

363
364

2?9

E4 344 244 F4

22* E5

949

%

245 FS 365

1

?.Jo E6

34«

it 4*

f-B Jbh

L

231 E7

347

™

P47

=7

3*7

J

282

HI

?bTj

«

flfl F8

370

4.

233 E9

351

1

249

F9 371

\

£34 EA

352

1

250

FA

37?

+

335 ES 353

r

251 FB 373

r

236

EC 354

^

£5?

FC

374

A

23'

EO 3£F.

L

ssg

FD 37r;

^

ZM

EF

356

J

254

FE

376

k

239 EF

.357

Note

These characters are composed

of six

vertical

dots. When using

these

codes to prepare diagrams. Line

Feed

stiould

be sei to Half forward

Line Fted. ]f

another

paper feed pitch is used, the diagram

will

noi

be accuraie.

49

Appendix

D/Programming

Information

The

following

items should be

considered

when

you

program

the Computer.

I

r

When

Printer Power is

turned

onr

*

Optional fund ions

are selected according i<\

the

titling of

the

Function

Selection Switches.

if CP Mode

is selected,

Full

Forward

Line

Feed 5s

set.

NL

(CR I LF) is

selected.

*

Underline

is not

set,

<•

Standard

character

is set

(not

Elongated

and

not Bold).

*

Buffer

memory is

completely

cleared.

2,

Every

character

font can

be

intermixed

with

another

style

of

character in the

same line.

However,

the

Printer

will

insert dot

spaces

to insure that

the

new

dot position

is valid for

the

current character

size. This

may

cause

unexpect-

ed

automatic wrap-around T*i

prevent

this,

intermix

characters

only on

short lines

,

or

don't mix

character

sizes on

the

same line*

3, Elongated

(Double-width)

characters

and

Underline

are not

terminated

a[

the end of

the

line

and such

printing

continues

until

a terminating command

is

received.

4, You

should avoid

wrap-around.

Wrap-around

will disturb

the dot count of

the

text in a line.

5-

In the kepeat

Data

commands,

printable

characters

can be repeated

as

many times

as

provided

for

in the count

number,

If

anv

function

code

is

received for

repetition,

it will

be

considered

an invalid

code

(X),

6. POS

commands

can

be Hied at any

carriage

position.

If a

designated

doL

column

address is in

the

current

test

which

ij

already

printed

out,

overprint

will

occur,

7.

Under Block

Graphic

printing.

Halt

Forward

Line

Feed

should

be used for

printing

diagrams.

&,

Line Feed In

tiraphics

Mode

is different

from Line

Feed

pitches

in

the CP

Mode.

An odd

vertical

spacing is

generated

in

Graphics

Mode,

Consider

the

following

relationship

between

Line Feed

piichcs

11 times of Full Line

Feed

-

IS limes

of

Graphics

Line

Feed

1

1

times of Half

Line

Feed

=

9

times of

Graphics

Line

Feed

9.

Graphic

printing can

be

intermixed

with

character

priming

in ihe

same line

Dot

density

in

Graphics

Mode

is the

same

as

the

density of the

former

character

style.

10, Bold

character

mode

is

useful for

headings

or

titles,

51

Programming

Examples

Note to Model II Programmer!):

If i lie Fiimei

guci

off-line

Jui

iiig a piini operation, mid remains tifT-Une

Tor

a

certain period of time, Model l\

TRSDOS wiH present an error message,

Appli-

cation program* should be

written to Ifap such errors, inform the

operator of

the error condition,

and

give the

operator a

chance

to correct the condition and

continue

printing.

If it is a BASIC applications program,

and I/O error

will

oc-

cur and

the operator may type CQhT

lUfXEB)

to continue.

The BASIC statements [PRINT

and LLJST ontpul lo tlic Line Printer. Sec

your

Computer's

reference manual for syntax details. Jf

vou

have

a

Color

Cam

purer,

read

LPRINT

as PRINT

#-2,.

Examples:

LUST

Lists the

resident

program to the Printer.

LPRINT "THIS IS A TEST."

Prints

the message in

quotes,

and tells the Printer that ihe nest printa-

ble character brings a new line.

LPRINT "THIS IS PART OF A

LINEV LPRINT "THIS IS

THE

REST"

Prints

both

messages on the same line (because of the semicolon)!.

The

nest

printable

character

received

starts a

new

line.

LPRINT " SMALL" ;C HRS(27);CHRS( 1

4);

"LAROE";CH RJ(27),CH R${ 1

5)

;

"SMALL

AGAIN"

Prints both normal and elongated characters on the same line.

LPR

INT

CHRS(27);

CH

RS(20)

;

" CONDENSED*;CH

RS(27);

CH

RStm

"

COM

PRESSE

D" ;CH R

J<27);CH

R$(

1

9);

"

STANDAR D*

Prints condensed, compressed, and standard characters in the same

line.

LPR1NT

"

STA

RT"

'CH

RSf27

);CH

RI(5

6};CHRS< I

MY,"

ONE L 1NE

"

:

CHRS(l3B);*TWO

LINE"

Prints these

letters

at 3/4 line pitch.

LPRINT

"START™

:CHRSr27>;CHRS(90t:CHRSf]2)i*

,

FULL

ONE

LINE";CHRS<:7);CHRS(W);CHRS(H);"2/3

LINE"

Prims these

letters

at full

line pitch,

then at

Hi line

pitch

(B/72'

=

l/

ft

*).

LPRINT CHRS( 1

5);

' UNDERLI NE";CHRS<

!<!>;"

WITHOUT

UN-

DERLINE"

Print;

both

messages underlined and non-underlined in (he same line.

LPRINT CHRS(27KCHRSOl};"BOLD

LETTERS'\CHR$(27>;CHRS<32);

"NORMAL LETTFR5"

Prints Bold letters

and

Normal letters

in the same line.

LPRINT

CHRSf2^CHRSm;"ABC"

Prints 9 characters of A and one chwactm

BC.

LPRINT

CH

RS( 1

3)

;CH

R*(2

7);CH

RS(

1 6); CH

KS(0 ]

); CH

RI<44);

"30OT H

POSITION

1 '

Prints above message

from

3-flOth

column

addrest.

LPR1 NT

CHRS(

I 8};CH

RStf

55);C HR$(

247);

CHRS(227); CHR

VI

93 );

CHR5(227) ; CHRS{2

<1

7

};

CHRSQ55

>;

CHRS< 3

0)

Prints a special symbol in Graphics

Mode.

LPRINT CHRS(27): CHRS(2

U;

"

XXXX"

;CH

RS< 1

3

);

"

"

;CH

R$<27);

CHRi(22J;"UUUU

'

Prints

XXXX

and then OGflfl in the next line.

52

Appendix

E/Care

and Maintenance

1, Always plug the Printer into a

3

-wire

grounded recc pine k

-

2-

Be

sure

thai the Top

Cover

is

closed and secured while

in

operation,

]f

it

is

open, the Printer is OFF-LINE and printing i;i impossible.

3.

Never operate the Printer without paper.

If

paper used

is less

than

4"

wide,

take-

core

to set

thnt

printing

docs

not

exceed paper

width-

4. Avoid leaning objects against the Printer or placing anything on top. If any

object

is

accidentally

dropped into

(he

machine,

turn power off and carefully

remove

the

object.

5.

Be sure to turn power OFF before replacing ribbon-

Nole:

When

you turn

power

OPF, all

data stored

in the Printer's

buffer

will be

lost; keep this in mind as you perform routine maintenance. Remember

that

U>e

jili rig the

Printer's power

can also cause erratic operation of the

CPU,

fj.

Use only

lint-free cloth to clean the

Printer surface, J>o

not use solvents Or

harsh cleaning agents. Mild detergent solution or

desk

top

cleanser

may he

used .sparingly.

7,

Keep

hands

away

from the Carriage mechanism while

the

Printer is in

opera-

tion.

Since the Carriage movies

with

considerable force, inserting your hand

would be extremely

hazardous.

8,

The

Printer

must

be

kept

dry.

If

water

is

accidentally spilled on

the

machine,

turn power

OFF

immediately

and

wipe

it dry. Do not turn power ON until

completely dry.

9, If

printed material

is too Sight or too dark, check to see if the Print

Head

is

positioned properly. If neceuary,

contact your

local

Kadk> Shack Computer

Center,

Care

*

Do not jsc organic solvents or alcohol

when

cleaning

the cover.

*

Never openiLe the Primer when she Top

Cover is

open,

*

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 ihe Print Head than do

text charac-

ters.

If

you

prim too many block

graphic characters

or graphics without

paus-

ing, the Print Head could

overheat,

causing the fuse io blow.

When you

must

print

graphics continuously,

be sure to pause the printing

for

at

least one

minute after each l/6th

paper

i? printed (aijuming a

9"

>;

J

I

*

page).

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

•

[ft he Print

Head

becomes clogged

with

ribbon material or

paper lint, careful-

ly remove such material with x finely

rwiinted

tool

(preferably

a toothpick).

This

should be regularly

checked.

•

A

Print

Head's life expectancy

is

approximately

2000

hours (in oLhcr

words,

ir

you use the Piintci

two

hourif a day on the

average,

the Print Head

should

be

charged every

12 months)

When

poor print

quality, sticking ribbon,

or

bent

character printing occurs,

you

should have

the

Print Head replaced by

a

Ka-

dio Shack service technician. S3

*

After

cleaning

with a soft cloth

t

lightly oil the carriage guide with a tiigh-

£rade ester

lubricating oil or with hiph-j?ratic sewing

machine

oil. (This should

be done at least every six months.) Lubricate the platen

removing shajf,

the

ribbon

Jeed

revolving

shaft,

and the gear

revolving

shafi,

using

molybdenum

disulfide

t-ompound

ot another high- grade lubricating gretuc,

Because

ink from the [taper can get on I he Paper Bail rollers.,

we

suggest a

periodic

cleaning

of

the rollers. Use

90**

isopmpyl alcohol to remove

ink

build up oti the

toilers

as

oftenasnecessary.

If You

Have

Problems.

.

,

If the Printer fails 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

Slops

before paper

runs out.

•

is

power cord properly connected?

•

is

power source

vonage too lew?

Printer should stop if below 90%

of

rated

voltage.

•

If you cannot hear any sound or see any movement,

remove

the

Printer Cover and check [he

fuses.

Printer

stops. Is

paper

loaded

propurly ?

Is

carriage

guide dirty? If so, dean it by

using

a soft

cloth

and

lubricate

it with

a hiqh-q/ade ester lubricating oil or high-

grade

sewing machine

oil.

Has some

object

dropped inside the Primer?

If

nothing is wrong, turn

power OFF,

then ON.

Ribbon tails la track

properly.

•

Is ribbon cassette

properly

set?

•

Hes ribbon come loose from the

print

head

ribbon guide?

•

1 5 ribbon so worn that it does

no!

feed

smoothly from the

cassette?

•

Has the

Print

Head

reached its life expectancy?

A worn

out

head

will

stick

to

ribbon and interfere with smooth

movement.

Replace the

Print Head with a new one.

Poor

print quality

or

smudging on

paper.

»

Is ribbon old

and/or

worn?

*

Is the

Print Head set al the proper

position?

•

Is the tip of

the

Print

Head dirty? If dirty,

dean

it off with a

toothpick or

needte.

Did

you

dean

ihe ribbon

guide posts

when you

replaced

the

ribbon

cassetie?

It dirty, remove the

ribbon cassette and

Clean

the

ribbon guide poSlS

with a soft dry Cloth.

Erratic

operation or

wrong

character

printing.

•

Is me

interface

cable and/or

connector

damaged?

•

Are

interface

connectors

inserted property to the Computer

or

to the Printer?

The paper

cannot

be

advanced

smoothly.

•

Is paper

loaded

properly

into the

entrance

of

the

insertion

opening?

•

Is

any obstacle

preventing smooth paper

motion?

•

Does

paper stick

or tear

because of the side

guide pins?

Note:

If the (rouble

cannot be

corrected after

making

the

above check-up

and

adjustment, check foi secure

con-

tacts

of

all connectors. If you can*t

eliminate the problem,

take the

unit

to

your

Radio Shack Store

or

Computer Cento for

repair,

3*#

Printing Limits (Duty

Cycle)

Ttat DM

P-

105 does have

its

limits

when

h comes to

heavy,

continuous

printing. Depending upon the type of

printing being performed, those

limits

raiy,

DMP-105

Printing

Limits

Block

Graphic

100%

1/3

Noltt These figures

are based

on

an

80-eoIuflin printing

width.

100% priming *ould mean every column is

p:intcd.

55

Appendix F/Schematic

Diagram

™

d>m

—

2*

2

*

I"

1

1 a. a. L -c > i' L ii L

>

fe4

sff

I III ll£

m

h «

5*

%

^

ft

T

isassaSs

Ih iMtiMtitig

t? i I i i

k-j

J- J

'*.

=}*

*f

Jp

I. r. Lj r-. u LT

.1

iLl^i

IIS

^

^

W\

1

53

1

H

35

1<

J

|S

^p

P?5

£

57

r"

Appendix

G/Specifications

Printing Speed

(chaiactcr

per

second}

Siaiiiiaid JO

CP!

..»»

80

Elongated

Standard

5 CPI

«...

,

40

ComprCised

12 CPI

65

Elongated

Compressed

6

CPI ....

....

32,5

Condensed

16,7

CPI «...

46

Elongated

Condensed

B.3 CPT

23

Characters

Pet Line

Standard 10 CPI

,

.>

80

Elongated

Standard 5 CPI

40

Compressed 12 CPI

%

Eluiigatcd

Cumpiciwd

CPI .,

48

Condensed

16,7

CPI

133

Elongated

Condensed

£.3

CPI

66

Dots

Per Character

Standard

10

CPI

,

12

Elongated

Standard 5 CPI

- 24

Compressed

12 CPI

-

'2

Elongated

Compress™!

& CPI .;

24

Condensed

16-7

CPI

12

Elongated

Condensed 8.3 CPI .„„..

24

Vertical

Sparing

, ,

».„*.-«..- ..

12, 6,

8

lines

per

inch

(Compute'

selectable),

7/72"

and

n/72* (n/12 line feed)

available.

Dots Per

Line

Standard 10 CPI

%0

dots

Elongated

Standard 5 CPt

V>60 dots

Compressed

12 CPI ...

1152 dots

Elongated Compressed 6 CPI „.

J

152

dot*

Condensed 16.7 CPI

1600

clots

Elongated

Condensed S3 CPI .,,.

1600 dots

Character set

Standard.

Compressed, Condensed ,

ASCII

94,

European

Symbols

32,

Block

Graphics 30

Interface

Parallel ....... ,,,,.

8-bit with strobe

signal

Serial

8-bit.

Baud

rate

selectable

(600

BPS or 2400

BPS).

Print Head Life .... 50

million

characters

typical

Preventive Maintenance Normally

every

6

months

Temperature and HuiTiidiU'

Range

Operating

32*F~ 110'F

(Q

e

C-43.3°Q

40-80%

RH

Storage

...............

., -4O°F-]60"F

<-40

D

C-7rC> 20%^90^d

RH

Paper

Fanfold Paper

4'

-9.5"

wide with

jiliidc

holes

Single Sheets .

A"'-9.S

M

wide, good quality,

40-60

I

g

(14-22

lb)

Copy Paper , ,

,

,.,.,.,.. 1 original, 1 copy

34

fcg

(1

1

lb)

non-carbon

paper

Ribbon

Cassette

Catalog

Number 26-14IS

Power Requirements

120 VAC,

60 Hz (for

USA/Canada),

or

220

V/240

VAC,

50 Hz (for

European and

Australian models). 21 W minimum.

59