Tandy DMP 106 Operation Manual

TANDY®

Dot

Matrix Printer

DMP

OPERATION MANUAL

106

CAT. NO. 26-2802

For

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If

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the

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foundtocomply

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against such

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interference in a residential

will

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receiver

computer

installed and used properly,

limits

for

a Class B

FCC Rules,

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in a

and receiver areondifferent

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are designed

installation.

installation.

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to

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This equipment has been
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this
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to

Subpart JofPart15of

computer. Operation

Dot

certifiedtocomply

with

Matrix Printer

Copyright © 1986 Tandy Corporation

Fort Worth, Texas 76102

Reproduction or use, without express written

permission from Tandy Corporation

of

licensor,

any portionofthis manualispro­hibited. While reasonable efforts have been
taken in the preparation
sure its accuracy, Tandy Corporation assumes
no liability resulting from any errors or omis­sions in this manual, or from the use
formation contained herein.

is

IBM

a registered trademarkofInternational

Business Machines Corp.

Warning

with

the

limits

FCC Ruies. Only peripherals

certifiedtocomply

non-certified peripherals is likely to result in interference

DMP

106 Operation Manual:

with

for a Class B

the Class B

All rights reserved.

of

this manual to as-

(computer

limits

and/or

of

the in-

computing

inputlouput

may be

attached

its

device,

to

to

2/86

10

9 8 7 6 5 4 3 2

Contents

Introduction ,.. .. ....... 1

1 Description

2 Setting Up the DMP

Paper Separator Installation. . . . . . . . . . . . . . . . . .

Tractor Installation and Removal . . . . . . . . . . . . .

Paper Loading

Ribbon Installation/Replacement. . . . . . . . . . . . .

Setting Print Function (DIP) Switches ,
Connecting the DMP

Carriage Movement Test ,
Self-Test ,
Connecting the DMP

Power-Up Sequence. . . . . . . . . . . . . . . . . . . . . . .

3 Using the DMP

of

the DMP

106

106

. . . . . . . . . . . . 3

106

. . . .... . . . . . . . . 9

106toa Power Source.

106

to a Computer

(General Printer Operation) ,.. ...

Control Codes ,
Sending Control Codes from
Character Printing Mode

Graphics Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting a Print Mode ,

BASIC.

. . . . . . .

..

..

..

..

..

10

10

12
16
19

21
21
22
22
24

25
25
26
27

27
28

4 Print Font Styles and Character

Selecting Font Styles

Standard Character Font Style. . . . . . . . . . . . . .

Graphics Characters. . . . . . . . . . . . . . . . . . . . . . .

Wrap-Around ,

Elongated Characters. . . . . . . . . . . . . . . . . . . . . .

I(

~

Widths..

r/'

A.

" \

"---.J

29
29

..

30

..

31
32

..

32

\,//

Bold Characters
Mixing Bold
Superscript and Subscript "
Selecting Character Sets

and

Elongated . . . . . . . . . . . . . . . .

33

..

34
34
35

5 General Control Codes "

Line Feed Codes (LF) "
Special Line Feed
Carriage Return (CR)
Setting Top-of-Form and Form Length "
Entering IBM Mode "
Ignored or Undefined Codes , "

DMP

106

Buffer Operation "

Codes.

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

6 Character Printing Mode "

Repeat Printing "
Underline Printing "

Print Head Positioning . . . . . . . . . . . . . . . . . . . .

Printing Directions "

7 Graphics

Printing Graphics Patterns "
Line
Repeat Function "
Print Density "
Leaving Graphics Mode

Mixing Modes on the Same Line

Freehand Drawing . . . . . . . . . . . . . . . . . .

Feed.

Mode.

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

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

..

..

..

..

..

37
37
37
38

39

39
39
40

43
43
43

44

47

49

51
53
54
54
55

55
55

8 IBM Emulation Mode. . . ... ... .... ... ...

Descriptionofthe IBM Emulation Mode . . . .

Carriage Return

..

..

59
59
59

Vertical
Horizontal
Printing
Other

Appendices

Formatting

Formatting

Mode

Control

Control

Control

Codes . . . . . . . . . . . . . . . . . . . . . .

Codes.

Control

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

. . . . . . . . .

Codes . . . . . . .

..

60

..

62

..

63

..

69

A Control Code Summary. . ... .. . .. ...... ...

Tandy
IBM

B Interface..;. ... ... ..... ... ... ... ... .....

Parallel Interface 79
Serial

Control

Control

Interface.

Codes

Codes..

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

..

..

C Character Sets. . .. ... ... ... ... .. . .. ... ... ..

Tandy
IBM

Character

Character

Sets

Sets . . . . . . . . . . . . . . . . . . . . . . .

..

D Programming Information ........ . .. ..

Programming

E Care and Maintenance..... ..... . .. ... ..

Care.
Maintenance 98

If

Printing

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

You

Have

F Schematic Diagram.. .. .. ...... ..

Examples 94

Problems

Limits (Duty Cycle)... . . . . . . . . . . . .

.. .....

..

..

...

73
73
76

79

85
85

89
93

97
97

98

100
101

G

Specifications..............................

103

Introduction

Tandyisproud to introducethe newest addition to its line - the DMP
Itisa very portabledot-matrix printer which can perform a varietyofdiffer-

ent printing operations. For instance, it can print:

• Standard characters - Normal, Condensed and Compressed.

• Graphics characters.
106

The DMP

• Character Printing Mode for output

or the creation

• Graphics Mode for drawing pictures, figures, or graphs.

In the Character PrintingMode, the DMP
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

• Standard (4"

Printer can also print one original plus one carbon copy.

• Standard (4"

Other software-controlled features include:

• Bidirectional minimum-distance access carriage motion.

• Full, half, and

• Underline capability.

and much more!

operates in two modes:

of

any text documentation.

of

paper with the DMP

-9.5"

-9.5"

wide) computer fanfold forms with guide holes. The

wide) single-sheet typewriter paper.

3/4

Forward Line Feed.

Of

program listings, report writing,

106

prints monospaced, 9 x 7 dot-

106:

106.

Description

Unpacking
Carefully unpack the DMP 106, being sure to locate the Ribbon Cassette

and the Paper Separator. Keep the empty ox and packing materials just
in case you ever need to transport the Prin er.

of

t e DMP 106 1

Figure 1. DMP 106 Dot Matrix Printer

3

Descriptionofthe

Be

sure to remove the Yellow Band from the Carriage. (Refer to Figure 2.)

DMP

106

Figure 2. Removing the Yellow Band

Read this manual carefully. The more familiar you become with the DMP
106,

the more value you will get from the Printer.

4

®

Chapter 1

®

Figure 3. DMP

CD

Power

ON/OFF
the power ON. Press the switch the other way to turn the power OFF.
Note: Turning the power OFF and ON during operation may cause loss
of

the current data.

Switch. Press the sideofthe switch

Figure

106

(Top

4.

Power Switch

5

View)

marked"I"to turn

Descriptionofthe

@

POWER
nected with

@

ON-LINE/OFF-LINE
communicate with
Printer

@

Platen
the
Friction, for the friction feed feature (toward therear side

®

Paper

®

Tractor
DMP
Tractor

(})

Tractor
the Tractor can slide from side
it is locked

®

Paper

®

Paper

@)

Platen.

®

Top

ON

stops the communication.

Pressure Lever. This lever has two positions.

tractor

Bail.

Feed. This

106

when printingonsingle-sheet

Cam.

Feed

Insertion Opening. Insert

Cover.

DMP

Indicator.

the

Power

the

feed feature

For

optimum

Tractor

for

detailsonusing

Whenthe

into

position.

Knob.

Turn

106

Illuminates whenthe

ON/OFF

Switch.

computer.

(toward

print

Cam

clockwisetomanually advance

Switch

When

When

the

quality, keep

Feed is removable. See Setting

the

is moved towardtherear sideofthe Printer,

to

side,

the

ON.

pressed in,

pressed again

frontofthe Printer);

the

Tractor

Feed. You

paper.

and

when moved towardthe front,

paper

here.

DMP

Bail

106 is

the

Printer

and

One

downonthe

can

properly

is ready

released,

is Release,

the

other

of

the Printer).

Up

remove

the

paper.

con-

to

the

for

is

paper.

the
the

@

Transparent

@

Hole

Cover.

@

Paper

@

AC

Power

ModelIIusers:Ifa BASIC
error,

typing:
tire contents
Head

position.

Cover. Shouldbeopened

Put

this Coverinplace when the

Separator.

Cord.

CON

T [

ENTER

of

the print

buffer

while handling

Tractor

program

Iwill causeprinting

will be printed, starting withthe current

stops execution becauseofa

to

resume. However

6

the

is removed.

Paper

Bail.

Printer

the

en-

Print

Chapter 1

CD

Figure 5. DMP

CD

Power Cord. Plug the power cord into a wall outlet or approved power

strip.

@ Parallel Interface Connector.

capabilities, connect the cable here.

the right cable for your computer.

@ Serial Interface Connector.

interface capabilities, connect the cable to the serial interfaceconnector

See

indicated.

Computer or Data Terminal.

Note: Serial interface

@ PrintFunction (DIP) Switches. The settings

mine exactly how your Printer prints in various situations.
Print Function (DIP) switches.

Setting Up the DMP

is

not supported in IBM emulation mode.

106

If

your computer has parallel interface

If

you have a computer with serial printer

®®

(Rear View)

See

Setting Up the DMP 106 for

106

for the right cable for your Color

of

®

these switches will deter-

®

See

Setting

® GroundScrew. Connect theground wire from the shielded printer cable

here.

7

Setting Up the DMP 106 2

The following Start-Up Checklistisa summaryofhow tosetupyour Printer.
You should follow this procedure every time you start-upthe Printer - NOT
JUST

THE

FIRST

o Find a good spot for your Printer. Be sure to consider:

Work

•
stand.

• Length
allowed between your computer

• Papertakes up space.
flow.

• Noise factors. Situate the Printer as far as possible from noise gener­ators such as refrigerators

[Z]

Be

sure the Power SwitchisOFF.

TIME.

surface. Place the Printerona sturdy desk, table,orprinter

of

the printer cable. This determines the maximum distance

and

printer.

Be

sure toleave enough

and

industrial equipment.

room

for smoothpaper

Figure 6.

[2] Remove the packing materials, including the Yellow Band.

[Z]

Install continuous form fanfold paperorsingle-sheet paper.

o Check the Ribbon Cassette.

stallation/Replacement.

o Set the

o Connect the

outlet (220/240V,50Hzwhere the unitisso marked).

Print

Function (DIP) Switches (on the rear sideofthe Printer).

AC

Power

power plugtoa 3-wire, 120 volt, 60Hzgrounded

Switch (OFF Position)

If

it has

not

been installed, see Ribbon In-

9

AC

Setting Up the

DMP

106

o Check to

seeifthe Printerisready by running the Self-Test.

o Connect the interface cable from the computer to the printer interface

connector.

o Turnthe Power ON and check that the Power ON Indicator (on the Con-

trol Panel)

o Place the ON-LINE/OFF-LINE Switch in the ON-LINE position.

o

Be

sure that the Top Coverisclosed securely.

Paper Separator Installation

Install the Paper Separator by inserting the tipsofthe Separator into holes
provided on the top

Tractor Installation and Removal

This Printer can be used with either the Tractor Feed system or the Friction
Feed system. The difference
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 achieved
single sheets

Installing the Tractor

1.

Set the Power

is

illuminated.

of

paper.

of

the Printer (behind the Paper Insertion Opening).

is

that the Tractor Feedsystemisused with paper

ifitis

removed - especially when using

ON/OFF

Switch to OFF.

2.

Open the Top Cover and remove the Hole Cover.

3.

Move the Paper Bail forward (toward the frontofthe Printer)

4. Place the pins inthe Tractor onto the cutouts,
is

on the Tractor until it

5. Move the Paper Bail back against the platen.

6.

Close the Top Cover.

securely locked into position.

10

as

shown. Then push down

Chapter 2

Removing the Tractor

1.

Set the Power

2. Open the Top Cover.

3.

Move the Paper Bail forward (toward the frontofthe Printer).

4.

Hold the front barofthe Tractor in your hand and pull upward; then
push it away and remove the Tractor.

5.

Move the Paper Bail back against the platen.

6.

Replace the Hole Cover.

7. Close the Top Cover.

ON/OFF

Switch to OFF.

Figure 7. Installing the Tractor

11

Setting Up the

DMP

106

Paper Loading

Warning! When loading paper (single-sheet or fanfold), be sure the paper
correctly enters the Paper Insertion Opening.

It

is

very important that the paper enters the DMP

106

straight. The paper

must be directly behind the Printer or paper skewing or jamming may oc-

of

cur. Proper positioning

the Paper Separatorisalso important to help pre-

vent paper jamming.

PRINTER

I I

I I

L-~

I I
I I

I I

I_

iPAPER I

WRONG RIGHT

If

the fanfold paperiscorrectly loaded, it should enter between the body

of

the Printer and the PaperSeparator. Once the paperisloaded and power

is

ON, presstoset the ON-LINE/OFF-LINESwitchtoON-LINE. Then you

may begin printing.

Sing~e-Sheet

1.

Be

sure the Power SwitchisOFF.

2.

Remove the Tractor and replace the Hole Cover. (See Tractor Installa-

paper Loading

tion and Removal.)

3.

Move the Platen Pressure Lever forward (towardthe frontofthe 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

Pressure Lever back toward the rear side

of

the Printer. Use the Paper

Feed Knob to pull the paper around until it appears between the Platen

and the Print Head.

to

6. Move the Platen Pressure Lever forward

align the paper. Push the

Platen Pressure Lever back again.

12

Chapter 2

7.

Tilt the Paper Bail back toward the rear sideofthe Printer.

8.

Close the Transparent Cover.

is

Warning! The gap between the Print Head and the Platen
adjusted properly at the factory. Do not try to adjust it.
is

outofposition, contact yourlocal Radio Shack Computer Service Center•

mechanically

If

it looks like

./

QB0/

00

Figure 8. Single-Sheet Paper Loading

it

Hints

• With the paper properly installed, printing

• Remember to set the Platen Pressure Lever and the Paper Bail toward

• When you want to print a

and

Tips

On

Single-Sheet

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.

of

Next, insert another piece
vance the paper. When the paper
LINE Switch again and the DMP
it left off, without loss

of

the rear side

Paper Empty Sensor, press the ON-LINE/OFF-LINE Switch once to set

it to OFF-LINE; then press it again to set it to ON-LINE. This will print

one more line. Just follow this procedure once for each additional line

you wish to print.

the Printer while using single-sheet paper.

paper and turn the Paper Feed Knob to ad-

of

data in the print buffer.

few

Paper

is

in place, press the ON-LINE/OFF-

106

will continue printing from where

more lines after the paper has passed the

13

Loading

will

continue until the paper

...

Setting

Up

the

DMP

106

Fanfold Paper Loading

The DMP
wide. The paper may contain one original plus one copy.
Before using fanfold paper, however, the Tractor should be installed.

To load fanfold paper into the DMP

1.

2.

3.

4.

5.

6. Close the Pin Feed Clamps to secure the paper.

106

will

accept standard fanfold paper thatisfrom4"to 9.5"

106

:

Set the Power

Open the Transparent Cover.

Gently move the Platen Pressure Lever and the Paper Bail toward the

of

front
Open the Pin Feed Clamps.
Pass the paper between the bodyofthe Printer and the Paper Separa-

tor. Insert the paper intothe Paper InsertionOpening and push the Platen
Pressure Lever back toward the rear side
Feed Knob to pull the paper around until it appears between the Platen
and the Print Head.Besure the paperisstraight so that the holes
line up withthe pin feed sprockets. Move the PlatenPressure Lever for­ward to align the paper; since pin feed paper
Platen Pressure Lever in the forward position.

If

Note:
Cams toward the rear side
from side to side; after adjustment, pull the Cams forward to lock the
Tractors into position.

ON/OFF

the Printer.

re-positioningofthe Tractorsisnecessary, move the Tractor

Switch to OFF.

of

the Printer. Use the Paper

is

being used, leave the

of

the Printer so that the Tractors can slide

will

7.

Move the Paper Bail toward the paper.

8.

Close the Transparent Cover.

14

Chapter 2

Figure9.Fanfold Paper Loading

Warning! The gap between the Print Head and the Platen is mechanically
adjusted properly
out of position, contact your local Radio Shack Computer Service Center.

at

the factory.

Don't

try to adjust it.Ifit looks like it

is

Hints

• Remember to set the Platen Pressure Lever toward the frontofthe Printer

and

Tips

on

Fanfold

and the Paper Bail towardthe rear side
paper.

Paper Bail

Figure 10. Platen Pressure Lever and Paper Bail Position

Paper

15

Loading

of

the Printer while using fanfold

...

Paper Pressure Lever

Setting

•Besure that the paperispositioned so thatit cantravel through the Printer

•

Up

the

DMP

without binding .

Do

not let paper pile

be pulled back into the Paper Insertion Opening. This could
feed

or

damage the Printer.

106

up

on

topofunprinted paperorprinted paper may

jam

the paper

Figure 11. Paper Insertion

Ribbon Installation/Replacement

If

the Ribbon Cassetteisalready installed, simplycheck to

ly threaded between the paper and Print Head.

If

the Ribbon Cassetteisnot installed,orif

sive wear, faint printing, etc., follow this procedure:

1.

Set the Power Switch to OFF.
NOTE: When you

Printer's buffer will automatically be lost.

2. Open the

3. Gently grasp the Ribbon Cassette and remove the Cassette by lifting it
upward.

Top

turn

Cover.

the power OFF, any information stored in the

it mustbe replaced due to exces-

16

see

that itisproper-

Chapter 2

Note: Every time you replace the ribbon cassette, clean the two ribbon
guide posts (located at the left end
cloth.

Figure 12. Cleaning the Ribbon Guide Posts

4. Unwrap the new Cassette and remove the packing foam.

5. Gently move the Print Head to the extreme right.

of

the carriage shaft) with a soft dry

CAUTION:
Print Head.

Be

sure Printer powerisOFF before manually moving the

Figure 13. Power Switch (OFF Position)

17

Setting

Up

the

DMP

106

6. Hold the new Ribbon Cassette and pass the ribbon end around the Rib­of

bon Guide Posts near the left edge
sette toward

.the righttodraw out the ribbon.

7. Gently press the Cassette down until it
of

Claw

the Cassette Holder.

Do not force the Cassette into place!

will

ted, the Cassette Knob

not match up with the shaft from the Cas-

the Printer; then move the Cas-

is

firmly secured by the Stopper

If

the Cassetteisnot properly fit-

sette Holder. Do not force theCassette down, but fit it in gradually while
pushing and turning the Cassette Knob in the indicated direction. (See

Figure 15.)

8.

Once the new Cassetteisinstalled, move the carriage back and forth
manually. The ribbon

will

be gradually inserted between the Ribbon

Guide and Print Head.

Ribbon

guide Bezel

Print

head

Ribbon

guide

Ribbon

Figure 14. Ribbon Position

9. Keep moving theCarriage andcheck thatthe ribbon advances properly.

If

the ribbon has not been properly fitted between the Ribbon Guide
and Print Head (Le., into the Print Head Ribbon Guide Bezel), the rib­bon feed will not operate smoothly.

10.

Close the Top Cover.

18

Figure 15. Ribbon Cassette Installation

Chapter 2

Setting Print Function (DIP) Switches

There are four switches locatedonthe left rear sideofthe Printer. These

of

switches allow you to customize some
applications.

When you set switch 1 to OFF before turning the DMP 106's power ON,
the DMP
shown in Table

106
Table 2. For instance, in Tandy mode, you can select different baud rates
and interface modes.

Remember! The Printer power must be OFF before you change any
switches.

106

selects Tandy codes.Inthis setting, the switches function as

1.

On the other hand,ifyou set switch 1 to ON, the

selects codes for IBM. In this case, the switches function as shown in

the DMP

19

106

features for your own

DMP

of

the

Setting

Up

the

DMP

106

!

ON

OFF

2 3 4

(In IBM Mode)

!

z

o

234

(In

Tandy Mode)

Figure 16. Print Function (DIP) Switches

1.

DIP

Table

Switch Function in Tandy Mode

(Switch 1 set to OFF)

Pas. Symbol

1 Control Codes Tandy Codes

2 Serial/Parallel Serial Interface Parallel Interface
3 600/2400

4

CR

BPS

ON

600

BPSinSerial

terface terface
Carriage Return Only Carriage Return &

(CR=CR)

In-

OFF

2400

BPSinSerial

Line Feed

(CR

ON

OFF

=

In-

Nl)

Table 2.

DIP

Switch Function in

mM

Mode

(Switch 1 set to ON)

Pas. Symbol

1 Control Codes Codes for

2

3 Character Set Character Set 2 Character Set 1
4

IF

CR

ON

IBM

Line

Feed

Only Line

(IF=IF)

Carriage Return
(CR=CR)

Only·

OFF

Feed

& Carriage

Return

Carriage Return &

Line Feed

(IF

=

(CR

Nl)

20

=

Nl)

Chapter 2

Connecting the DMP 106 to a Power Source

Before plugging the power cord into anAC power outlet, check the following:

o Is the Printer Power

[2J

Have you removed the Yellow Band from the Carriage?

[2J

Don't

connect the Printer to your Computer yet.

Connect the AC power plug to a 3-wire,

(2201240

strip such as the Plug-In Power Strip (Radio Shack Cat. No. 61-2619) or
the Automatic Power Controller,

V, 50 Hz where the unitisso marked), or to an approved power

ON/OFF

Switch set to

120

volt,

SW-301

(26-1429).

OFF?

60Hz

grounded AC outlet

Carriage Movement Test

The Carriage Movement Test allows you to check that the Carriage moves
freely from one end
properly.

Printing
You can run the Carriage Movement Test by following these steps:

1.

2.

is

not performed during the Carriage Movement Test.

Set the ON-LINE/OFF-LINESwitch to
er Switch to ON.

The Carriage first moves toward the right until it strikes the Right Switch
which determines how far it must move to reach the home position at
the left; then it moves left until it reaches the home position.
Press the ON-LINE/OFF-LINE Switch to set it to
Carriage

forth, performing a Line Feed

of

the Platen to the other and thatthe Platenisturning

OFF-LINE

is

moving toward the left. The Carriage will move back and

at

the endofeach line.

and then set the Pow-

ON-LINE while the

3.

Turn the power

OFF

to end the Carriage Movement Test.

21

Setting

Up

Self-Test

the

DMP

106

The DMP

quality and general printer operation before you connect the Printer to your
computer. This
(printing
ly. The Self-Test
Before running the Self-Test, however, always be sure to load the DMP

with wide paper (9.5 H wide) since the test prints from one endofthe Platen
to the other. Printing on the Platen can shorten the life
the Print Head.

To run the Self-Test:

1.

2.

3.

4.

The Printer will begin printing rolling ASCII

CPI mode.

5.

106

has a built-in SeIt-Test feature which lets you check printing

is

a good time to check that the Print Headisset properly

is

neither toofaint nor smudged) and that paperisfeeding correct-

will

last for several minutes.

106

of

the Platen and

Plug the Printer into an AC power outlet.
Set the ON-LINE/OFF-LINE Switch to ON-LINE.
Set the Power
Press the ON-LINE/OFF-LINE Switch to set it to OFF-LINE while the

Carriage

Printing

ON/OFF

is

moving toward the left.

will

continue until you turn the power OFF.

Switch to ON.

96

characters in Standard

Connecting the DMP 106 to a Computer

Before making any connections between the Printer and your computer, be

sure all units are off!

10

You need the correct cable for your computer. Table 3 describes the printer

cables carried by Radio Shack; Table 4 provides a quick reference for printer

connection locations.

22

Table 3. Computer to DMP 106 Cables

COMPUTER

Model I (Keyboard only)
Model I (Exp. Interface)

Modelll/12/16/16B/DT-1/

Tandy 2000

Model 1II/4/4D/4PITandy 1000

Computer·

Color

Model 100ITandy 200/600

DT-100·
Tandy 1200/3000
Tandy 1000EXl1000SX

Tandy 3000HU3000HD

Table 4. Computer Connection Points

COMPUTER

Model I (Keyboard only)

Model I (Exp. Interface)

Model 1I/4PI12116/100

Modellll/4/DT-1/DT-100
Color Computer
Tandy 200/600/1000/1

1000SXl1200/2000/3000/

3000HU3000HD

OOOEXI

Chapter 2

Cable Number

26-1411 (available through National

Parts)
26-1401

26-4401
26-1401
26·3020
26-1409
26-1361
26-1347
26-225
26-227

Connector

Rear side of Keyboard
Left side of E.!.
Rear Panel of Computer
Underneath Panel
Rear Panel of Computer

Rear Panel of Computer

• When you use the Color Computer or the
off

set DIP switch 1to the

position. Serial interfaceisnot supportedin IBM

emulation mode.

23

DT-lOO

data terminal, always

Setting

1.

2. Connect the other endofthe cabletothe Printer Jackofyour Com-

Up

the

DMP

Attach the molded male endofthe cable to the connectoronthe left
rear side
Do not force the plug.

If

you are using shielded printer cable, connect the ground wire to the

ground screw shown in Figure

puter. See your computer owner's manual for specific instructions.

of

the Printer.

106

If

it doesn't fit one way, turnit over andtry again.

17.

__

..JuU

=

-

=-f

S";"'"~rl~'~

Figure 17. Connecting the Interface Cable

R)

/ I

Parallel interface

V'

"\GrOUnd

wire

Power-Up Sequence

The specific power-up sequence
gest you consult your computer owner's manual for details
your computer with peripheral devices (such as printers).

In

any event, the Power Lamp will remain lit while the PrinterisON.

It

is

essential thatthe Printer remains ON when connectedto theComputer.

If

you turn the power ONorOFF,ora Printerisconnected but not turned

of

on, erratic operation

the entire system may occur.

will

depend upon your Computer. We sug-

on

powering

up

24

Using the

DMP

106 3

(General Printer Operation)

The DMP

• Character Printing

• Graphics Printing

The Printer responds to software codes from the computer in two different
ways
many similarities, but each has its own unique features.

The Character Printing Modeisused for printing characters. In this 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
pitch

The Print Pitch (character spacing)
DMP
Consequently, you must think
printed per inch
5 CPI, 6 CPI, and 8.3 CPI for Elongated printing.

In Graphics Mode, you have completecontrol
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

ply ignores the code. This includes codes that changeline feed pitch. Graph-

ics

Mode

106isdesigned for two distinct applications:

- one for each application. The two response patterns, ormodes, have

is

printed, the List Feed commands stored in the memory determine the

of

the paper feed.

is

determined by the space the

106

puts between each printed character and also by the Font Style.

of

Pitch intermsofthe numberofcharacters

10

CPI,12CPI, and

106

doesn't return an error when you send such a code - it sim-

uses

only one Line Feed (7/72") to insure full coverageofthe paper.

16.7

CPI for Standard printing and

of

the Print Head. This mode

Control Codes

Before investigating the various print modes, consider how thecomputer com­municates with the Printer.

is

All information
(OO-FF
according to the American Standard Code for Information Interchange, com­monly referred to
codes.) Most numbers (or codes) are printed
bols. However, the numbers 0-31,
numbers, are used to control various functions
trol Codes allow you to change charactersets, select print modes, underline,
etc.

for you hexadecimal fans). The Printer interprets these numbers

sent to the Printerasnumbers between 0 and

as

the ASCII code.

(See

Appendix C for a listofASCII

as

letters, numbers, or sym-

as

wellassome special sequencesofcode

of

the Printer. These Con-

25

255

decimal

Using the

The Control Codes have different meanings, depending on thecurrent print

mode.
next
ous Printer fuctions. Read these sections carefully.

DMP

If

a Codeisnot recognized by the Printer, itisprinted as X. The

few

sections demonstrate how someofthe Control codes activate vari-

106 (General Printer Operation)

Sending Control Codes from BASIC

Note: Tandy codes are discussed in this section (DIP switch 1 set to OFF).
For IBM codes, refer to Chapter 8,

Some Printer features are activated by a single code, but many functions

of

require a sequence
gin with decimal
fies the
determines which Printer feature
these codes to the Printer.

Prin..ter

two or more codes. Most multiple code sequences be-

27

(referred toasthe ESCAPE code). The ESC code noti-

that a special sequenceison its way. The next code(s) sent

mM

Emulation Mode.

is

selected. In BASIC, use CHR$( ) to send

Note: This section
to the Printer.

# -2, for LPRINT.

For instance, set up the DMP
the normal way. Then type the following program:

1111

REM

20

LPRINT"DATA";CHRS(27);CHR$(28);"PROCESSING

30

LPR

and RUN it.

~f1i5~PROCESSING

Roll the paper forward and look at the results. The word MODE printed
over part
CHR$(28) are the guilty parties. Take a quick look
shows the various code sequences understood bythe DMP
Code sequence CHR$(27); CHR$(28) means change the forward line feed
to half its normal distance.

will usethe command LPRINT inexamples thatsend codes

If

you're using a Tandy Color Computer, substitute PRINT

106asdescribed earlier and enter BASIC in

INT"

!'"lODE"

of

DATA PROCESSING. Why? The codes CHR$(27) and

at

Appendix A. This chart

106.

The Control

5

26

Chapter 3

Character Printing Mode

Line Feed commands are not executed immediately. The
did not cause a Half ForwardLine Feed until afterthe first line was printed.
The set Line Feed pitch stays in effect until a

designated.

Type:

LL18T

Sure enough. You still have that short Line Feed.
Type: LPRINT CHR$(27);CHR$(54) to return to normal Line Feed pitch.

I

ENTER

I

new

(27 28)

Line Feed pitch

sequence

Graphics Mode

Graphics Modeisvery different from theCharacter Printing Mode. For one
thing, Graphics Mode accepts only one Line Feed Code - CHR$ (10). This

is

Line Feed
Mode features are available in the Graphics Mode. Standard letters and sym­bols, for example, are ignored by the Printer when

Instead, numeric data from
Print Head. This lets you produce high-resolutiongraphic print-outs
logos, etc.

For a quick look at this Mode in action, change our test program to:

fixed at 7/72 ". Furthermore, onlya

128to255istranslated into dot patterns for the

few

ofthe CharacterPrinting

itisin Graphics Mode.

of

charts,

is

10

LPRINT

20

FOR

30

LPRINT

40

NEXT:LPRINT

and RUN the program.

CHR$(18) puts the DMP
255

are interpreted as dot patterns.

LPRINT

Type:
LUSTing the program to be sure you're not stuck in Graphics land.

CHR$(18);

1=128

CHR$(I);

CHR$

TO

255

CHR$(30);

106

into Graphics Mode. The numbers

(30)1ENTER

Ito return the Printer toCPMode. Try

27

128

through

Using the

DMP

106

(General Printer Operation)

Selecting a

Print

Mode

Table 5 summarizes the Control Codes required to move from one mode

to

another.

Table 5. Control Codes for Changing Modes

If

you're

CP

Graphics

In:

and want

change to: (Dec)

Graphics

CP

to

Send a

18

30

CHR$(

);

(Hex)

12

1E

Hints and Tips About Print Modes...

Character Printing Mode

• All commands which determine LineFeed pitch are stored in the Printer's
memory. They are not executed until a LF code
is

received. Then, the paper advances according to the pitch codes stored

in the Printer's memory.

• Line Feed commands stay in effect until replaced by a new command,

is

or until the Printer

turned off.

• All printable characters (except user-defined Graphics) can be printed in

this mode.

Graphics Mode

(10

• Only one Line Feed Code

the paper to move 7/72

• Decimal numbers

128-255

Dec.)isacceptable. The LF Code causes

1/

forward. No other pitchisallowed.

sent via CHR$in BASIC are interpretedaspin

firing patterns for the Print Head.

• Only a

few

code sequences are recognized in Graphics Mode.

(10

Dec. or

138

Dec.)

28

Print Font Styles

and Character Widths

The DMP

• Standard

• Graphic Characters
Each font style
The character styles differ in the size

characters are created within the matrix.
The horizontal dot positions overlap; vertical ones don't.

Font Style

Standard

Block

Graphics

Table 6 shows that there are three basic pitches:

• Normal

• Compressed

• Condensed

When character pitch
the data in the buffer
will

106

has two distinct print (character) font styles:

is

created with a unique dot patternlaid outin a grid or matrix.

of

the matrix and the way individual

Table 6. Character Widths and Densities

Matrix Size

9x7

6x6

is

changed (for example from Normal to Condensed),

is

printed, some dot spaceisadded, and then printing

continue in the current line with the new character style.

Normal10CPl/Elongated 5
Compressed 12 CPIIElongated 6
Condensed 16.7 CPIIElongated 8.35

Normal10CPI
Compressed 12
Condensed 16.7

Pitch

CPI

CPI

4

CPI

CPI

CPI

Selecting

Character styles are selected by Control Codes from your computer during
operation.

Character styles stay in effect until another style
Graphics Mode does not change the font. The DMP

active font on leaving the Graphics Mode.
Table 7

is

Font

a summaryofthe Character Style change commands:

Styles

29

is

selected. Even entering

106

returns to the last

Print Font Styles and Character Widths

Table 7. Character Style Change Commands

Send

a CHR$( ):

(Dec) (Hex)

27
27
27
27
27
27
27

19
23
20

14

15
31
32

1B
1B
1B
1B
1B
1B 1F
1B

13
17
14

OE

OF

20

If You Want:

Normal
Compressed
Condensed
Start Elongation

End Elongation
Start Bold
End Bold

Standard Character Font Style

The Standard character setisprinted in a 9 x 7 dot matrix(9dots wide by
7 dots high).

Each

of

the Standardcharacters can be printedin three main character widths:

•

Norrnal

•

CDmpressed

•

Condensed

Eachofthese widths can be elongated (double-width), which gives half as

many characters per inch and a total
You can get a better feel for the different available print widths by printing

a

few

sample lines. Type in this program:

NEW

110
120
130
140

230

240

250

and RUN it.

STANDARD

STANDARD

STANDARD

The subroutine in line 240 sends the required Control Codes to the
DMP 106. Line 230 returns to Normal character width and stops program
execution.

10

Characters

12

CPI

16.7

CPI

[ENTER

I

F$=»STANDARD »
N=19:

N=23:

N=2f2l:

LPRINT

LPRINT

W$=»NORMAL
W$="COMPRESSED ":GOSUB
W$=»CONDENSED

CHR$(27);CHR$(19):STOP
CHR$(27);CHR$(N);F$;»CHARACTERS

W$;"DENSITY"

RETURN

CHARACTERS

CHARACTERS

CHARACTERS

CONDENSED

Per

Inch

of

six different print widths.

»:GOSUB

":GOSUB

NORMAL

COMPRESSED

DENSITY

(CPI)

240

240

240

";

DENSITY

DENSITY

30

Chapter 4

Graphics Characters

The

second character set is a 6 x 6 dot-matrix character set used for Block

Graphics printing. Thecharacters canbe

12

CPI,orCondensed 16.7
screen graphicsofmost computers; it is a unique character set.
A 6

x6 dot-matrix character set is available

pressed12or6CPI,
To

see how the various charactei: widths affect the Graphics characters, add:

190

N=19:

200

GOSUB

210

N=23:

220

N=20:

260

FOR

270

LPRINT:

and

RUN

the

and

W$="NORMAL
240:GOSUB
WS="COMPRESSED ":GOSUB
W$="CONDENSED

1=224

RETURN

program.

CPI.

Condensed 16.7or8.3

TO

254:LPRINT

Normal10CPI

This set is

not

in

Normal

":F$="GRAPHIC

260

":~OSUB

CHRS(I);:

width, Compressed

fully compatible with

10or5

CPI

character conditions.

CPI,

":LPRINT

240:

240:

GOSUB

GOSUB

NEXT

the

Com-

260

260

I

STANDARD

STANDARD

STANDARD

GRAPHIC

•

•••..

GRAPHIC

""""".-..j

GRAPHIC

I

""

I'.-~

Since the normalline-to-line spacingis1/6"or12
ics characters
using

the

to

the

program:

10

LPRINT·CHR$(27);CHR$(28l;

20

FOR

30

FOR

40

READ

50

NEXT

60

NEXT

70

DATA

80

DATA

90

DATA

CHARACTERS

CHARACTERS

CHARACTERS

CONDENSED

CHARACTERS

_........

~....--.

CHARACTERS

.......

CHARACTERS

rs.IiiiI...,

are

Half

Forward

R=1
C=1

,--,

CONDENSED

T"

1-1

u.y

6 dots high, we can create continuous vertical graphics by

TO

3

TO

7

N: LPRINT

Line Feed (CHR$(27);CHR$(28).

NORMAL

COMPRESSED

DENSITY

NORMAL

,-1-1

COMPRESSED

or

1-1

W.L-f

+r

DEr~ITY

+1'

J"..

CHRS(Nl;

C: LPRINT
R: LPRINT

CHR$(27l;CHR$(S4l;

241,243,241,224,241,243,241

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

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

W.L.j

DENSITY

.......

DENSITY

DENSITY

DENSITY

+JI""

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

dots high

and

Add

the

Graph-

these lines

31

Print Font Styles and Character Widths

and RUN it.

E-=c

STANDARD

STANDARD

STANDARD

CHARACTERS

CHARACTERS

CHARACTERS

CONDENSED

NORMAL

COMPRESSED

DENSITY

DENSITY

DENSITY

GRAPHIC

..

•••...

GRAPHIC

••••••-...

GRAPHIC

" • •

'.-.1

CHARACTERS

-..111

1II"""Il&.lII,---,orI-I

CHARACTERS

rsr...JiI.---,

CHARACTERS

......

CONDENSED

,.....,.,.~I

U.l...l~~

NORMAL

L.I..l....1

COMPRESSED

T"

1-1

L.l

J....j

+T

A"-

DENSITY

DENSITY

+T

...of"l!lIII..

DENSITY

When you've printed out the results, delete lines10through 90.

Wrap-Around

The DMP
termined by the number

By

counting dot columns, a combinationofdifferent font styles, including
standard and elongated, can be printed on each line. The numbers
dressable dots-per-line in the Character Printing Mode is:

• Normal

• Compressed=

• Condensed=

If

the lengthoftext the Printer receives exceeds the limitofdots-per-line,
a Line Feed
next line. This

106isa dot-addressable Printer. Therefore, line lengthisnot de-

of

characters, but by the numberofdots-per-line.

of

ad-

=

960

1152

1600

is

inserted and the last characterisprinted from the startofthe

is

called wrap-around.

Elongated Characters

Anyofthe character font styles canbe elongated totwice their normal width.

Table 8. Elongated Printing

Send a CHR$( ):

(Dec) (Hex)

27 14
27 15

18
18

OE
OF

To:

Start Elongation
End Elongation

32

Chapter 4

The start
tered any number

(27

14)

and end

(27

15)

codes for Elongated characters may be en-

of

times within a line and can be used in every mode.

You can easily elongate the characters in the current program. Change:

100

230

LPRINT

LPRINT

CHR$(27);CHR$(141

CHR$(271;CHR$(19);

CHR$(27);CHR$(lSI:STOP

and RUN the program.

STANDARD
STANDARD

STANDARD CHARACTERS CONDENSED

GRAPHIC

-

-_

_-_-~

GRAPHIC

.

-.

.-_-_

GRAPHIC

• -•••__

CHARACTERS CONDENSED

~

CHARACTERS

CHARACTERS

CHARACTERS

_ _

CHARACTERS

=

........

.---,..,....1-1

COMPRESSED

DENSITY

COMPRESSED

........

I-

I

L...I..t-1......,~

DENSITY

NORMAL

NORMAL

-.-I-I

~

-t-.4

L---.I

4-P"'"

-L.-J

~

DENSITY

DENSITY

DENSITY

~

~

DENSITY

Bold Characters

Bold characters are implemented in much the same way as Elongated
characters.

Table 9. Bold Printing

Send CHR$(

(Dec)

27

31

27 32

):

(Hex)

1B 1F
1B 20

To

Start Bold Printing
End Bold Printing

Bold characters start when you send a CHR$( );CHR$(31) and stop when
you send a CHR$(27);CHR$(32).

When a

(27

31)

code sequenceisreceived, the DMP

106

prints the current
buffer contents; thenitresumes Bold characterprinting from thenext charac­ter received.

Bold characters can be added to the current program by changing lines:

1~0

230

LPRINT
LPRINT

CHR$(27);CHR$(311
CHR$(27);CHR$(19);CHR$(27);

CHR$(32):STOP

33

Print Font Styles and Character Widths

Now RUN the program.

STANDARD

STANDARD

STANDARD

GRAPHIC

•

••••

GRAPHIC

--.rl'..-.J

GRAPHIC

...

~

CHARACTERS

CHARACTERS

CHARACTERS

CONDENSEDIlENSITY

CHARACTERS

__

~.

CHARACTERS

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

CIi4RACTERS

....

CJ:.lNDefiEI)

~

...

I-I

NORMAL

COMPRESSED

NORMAL

-,.........,..,...1-1

COMPRESSED

-rl-I

U-4W~

lEISITY

U..L.j"'~

DENSITY

DENSITY

DENSITY

W.14+r~

DENSITY

Mixing Bold and Elongated

Bold and Elongated characters cannot be active at the same time. The first

to

code (either Bold or Elongated)

106

dence. The DMP

then simply ignores the second code.

be received and activated will take prece-

Superscript and Subscript

In Superscript and Subscript, character heightiscut in half. In Superscript

is

character printing, a character
in Subscript, a character

is

Table 10. Super./Subscript Printing

Send CHR$( ):

(Dec) (Hex)

27

83 0
27 83 1
27 88

18
18
18

printed on the upper halfofa line; and

printed on the lower halfofa line.

To:

53 0
53 1
58

Start Superscript Printing
Start Subscript Printing
End Super-/Subscript Printing

Superscript printing startswhen you send a CHR$(27);CHR$(83);

CHR$(O).

A CHR$(27);CHR$(83);CHR$(l) code sequence starts Subscript printing.

Send a CHR$(27);CHR$(88) tostop either Superscript or Subscript printing.

34

Chapter 4

When a
ters are printed in Superscript
received. When a
contents; then

(27830)or(27831)

(27

88)isreceived, the

it

returnstothe font style which prevailed before entering

code sequenceisreceived, subsequent charac-

or

Subscript printing mode until a

DMP

106

prints the current buffer

Super-/Subscript character printing.

of

The character style

Super-/Subscript printingisthe same as the one used

before entering Super-/Subscript mode.
Type in this program:

10 LPRINT

20

LPRINT

30

LPRINT

40

LPRINT

50

LPRINT

60

LPRINT

70

Ei'm

CHR$(27);CHR$(83);CHR$(~);

"SUPERSCRIPT";
CHR$(27);CHR$(83);CHR$(1);
"SUBSCRIPT";
CHR$(27);CHR$(88);
"CHARACTER"

and RUN it.

10

In this program, lines

and30start Superscript and Subscript and line 50

ends the Super-/Subscript.

Selecting Character Sets

The character set can be selected by the following commands:

(27

88)

is

Table 11. Character Set Change Commands

Send

(Dec) (Hex)

27

58 1B

27

59 1B

• When a

(27

58)

CHR$( ):

3A
3B

code sequenceisreceived, the

IBM Character Set

Tandy Character Set

DMP

To:

106

prints thecurrent
Tandy characters stored in the buffer; then it starts IBM character set 2
printing from the next character received.

DMP

106

• Whena (2759) code sequence is received, the

prints the current

IBM characters storedin the buffer; then it resumes Tandy characterprint­ing from the next character received.

35

General Control Codes 5

Line Feed Codes (LF)

When aLF(ASCII
buffer

DMP

is

printed followedbya Line Feed. Unless you tell it otherwise, the

106 uses

10)

codeisreceived bythe

1/6"

Forward Line Feed when advancing paper.

DMP

106, all datainthe Printer

Pitch settings are sentto the
trol Code

27

is sent (CHR$(27». This tells the

DMP

106

in a two-code sequence. First, a Con-

DMP

106

that

a special code

sequence will follow. The next number determines the specific pitch. These
Control Codes are listed in Table 12.

Table 12. Line Feed Control Codes

Send CHR$(

(Dec)

27

28
54

27
27 56

Hints

and

TipsonLine Feed

•Inthe Character Printing Mode, codes are stored in the
They are

not

activated until a

):

(Hex)

18
18
18

...

1C
36

38

LF

codeissent.

To:

1/2 Forward LF (1112")

Full Forward LF (116")

3/4 Forward LF (1/8")

Printer

buffer.

• Line Feed Pitch codes have no effect in the Graphics Mode. The Line Feed
is

setat7/72"

forward.

Special Line Feed Codes

There aretwo
oneisfor execution and the otherisfor setting.

27 90 n

27

nl72"

Forward Line Feed codes

Table 13. Special Line Feed Control Codes

Send CHR$( ):

(Dec) (Hex)

18

5A n

91

n

18

58

that

operate in different ways;

To:

n172"

Forward Line Feed

n

Execution

n172"

Forward Line Feed

Set

nl72"

Forward Line Feed Execution:

This code is effective

in

both

CP

and

Graphics Modes.

37

General Control Codes

• When a CHR$(27);CHR$(90);CHR$(n)isreceived by the DMP
is

data in the Printer buffer
ward Line Feed pitch

For example,

ifnis

cause one full Line Feed

n/72"

This code

It

• When a

Forward Line Feed Set:

is

similartothe above code except the timing to be executed.

is

effective only in

CHR$(27);CHR$(91),CHR$(n)

Line Feed occurs but it

The

n/72"

Forward Line Feed

Line Feed code

n

is

a value between 0-127.

(LF=10or

seno

printed followed by the LF code. The For-

is

determined by the value n between 0-255.

12,

one full Line Feed will be carried out be-

is

12/72" (116").

CP

Mode.

is

received by the DMP

is

stored in the Printer buffer.

will

be executed with the receptionofthe

138).

106,

106,

all

no

Carriage Return (CR)

A CR

(13or141)
and then performs either a Carriage Return followed by a Line Feed or a
Carriage Return only, depending upon the following New Line Control Code

setting.

(Dec)

27

21

27

code tells the Printer to print the current buffer contents,

Table 14. New Line Control Codes

Send

CHRS(

22

):

(Hex)

18
18

15

16

CR=CR
CR=CR

Set

+LF(NL) Set

To:

• When a CR (13 or
CHR$(27);CHR$(21) already received, only a Carriage Return

141)

Codeisreceived by the DMP

106

with a
is

per-

formed after printing the buffer.

• When a CR Code
a Carriage Return followed by a Line Feed (NL)

is

received with a CHR$(27);CHR$(22) alreadyreceived,

is

carried out.

• DIP switch 4 determines the mode at power on. (ON: CR only, OFF: CR

with NL).

38

Setting Top-of-Form and Form Length

Chapter 5

The control code CHR$(27);CHR$(52)isused to set the Form Length.
resets the line feed count to zero and sets the currentlineasthe Top-of-Form
position. The line length per page
Form Feed code.
operation

n

(x

On initial power-up, the DMP
position and the Form Length
is

properly positioned before you turnonthe Printer.

is

1/6").

If

n

is0or1,itischanged to2.Whenever any Line Feed

activated, the Line Feed pitchiscounted up and compared with

is

set so

thatn:(x

106

sets the Top-of-Form at the current paper

is

set to 66 lines per page.Besure the paper

1/6")isused with the

Entering IBM Mode

When a CHR$(27);CHR$(33) codeisreceived, the DMP

of

defaults
riage returns to its home position, and all
are read again.

Note: When serial interface

(27

33)isignored and the Printer stays in Tandy mode.

the IBM mode. That is, buffer contents are printed out, the car-

DIP

switches (except switch

is

selected (DIP switch 2ison), the code sequence

106isreset to the

Ignored or Undefined Codes

Codes
printed with the symbol X which representsaninvalid code.

There are several reasons why a code may be unusable in a certain mode.
nored.
codes in the range 0 to

CII 0, for example,
The following summarizes the undefined codes:

that

are unusableorundefined in given mode are either ignored

Redundant codes

For

(used toenter Graphics Mode)

that

don't

example, if the Printerisin Graphics Mode, sending a CHR$(18)

31

that the DMP

is

not used in either print mode.

or

change the current Printer status are usually ig-

is

useless. And there are many ASCII control

106

simply doesn't recognize. AS-

It

1)

39

General Control Codes

Table. 15. DMP 106 Ignored Control Codes

Both Modes:

• Out of rangeonrepeat sequence.
on

• Out of range

• Redundant codes that don't change the current printer status.

For example, if you send a CHR$(14) when underline

CP Mode:

Graphics Mode:

All codes

(27
Codes printed as X

CP

• All codes from

the above ignored codes.

• All codes between 192-223.

0,1,127,255

in

15),

(27 90

Mode only:

positioning sequence.

is

already set.

the range 0-127 are ignored, except (10), (13), (30), (27 14),

n),

(27 16 n1

0-31

n2)

and (28 n1

and 128-159, except the active function codes or

n2)

DMP 106 Buffer Operation

The DMP 106's ability to temporarily store dataisoneofits main advan­tages over a typewriter. Codes sent to a typewriter (Le., keys pressed) are
transferred immediately to the paper. Codes sent to a Printer are not print­ed immediately; they are stored in a separate section
called the buffer. When the buffer fills,
LF or CR), the buffer

is

emptied and all dataisthen printed on the paper.

What happens afterthe buffer data

or

certain codes are received (Le.,

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 CP Mode, commands for changing print fonts, Line Feed, etc., can
be stored in the buffer to take effect when the data

Understanding how the buffer works

full control

of

the DMP

106.

is

important for those who wish to gain

of

memory inthe Printer

is

dumped to paper.

Hints and Tips on the

For

CP and Graphics Modes

• The buffer allocates a fixed number
width selected. The buffer

DMP

106 Buffer.•.

of

dots, depending on the character

is

emptied when the data stored equals that

number.

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.

40

Chapter 5

• The Carriage Return (CR =13decimal) code automatically activates print­ing (assuming at least one character code

• The Line Feed

Print Head

•

If

the computer delays more than a second before sending the next print

code, the buffer

• The Head Positioning sequence
Printing continues

(27

16)

command.

• When the buffer

(LF=

10)

is

positioned at the startofthe next print line.

is

code automatically activates printing, and the

printed. Printing continues from the current position.

(27

in

the current line at the dot address specified by the

is

full, the bufferisprinted. Printing continues from

the current position.

CP

Mode only

•

If

a character setofdifferent dot densityisselected, the data in the buffer

is

printed. Codes for changing character sets are:

(27

23).
Printing continues in the current line with the new
adding some dot space.

• Dot graphics printing continues from the current character position.
is

• When a start Bold orend Bold

received, the bufferisprinted. Bold print-

ing continues from the current character position.

is

• Since the buffer capacity

and/or

Elongated features, the buffermay be printedbefore the contents

small,ifyou frequently use the Underline

exceed the capacity for one line. Printing
character position.

•

If

a CR =CR feature has been selected, receptionofthe Carriage Return

(CR =

13)

code causes the buffercontents to be printedfollowed by a Car-

riage Return, and the next full buffer

If

CR =CR +LF(NL) has been selected, it

New

to be printed followed by a

will

Printing

resumeatthe start of the next print line.

Line (CR and LF).

is

already in the buffer).

16

nl

n2) prints the buffer.

(27

19),

char~cter

will

continue from the current

will

overprint on the current line.
will

cause the buffer contents

(27

20), and

style after

Graphics Mode only

is

• When the End Graphics Mode command

received, the bufferisprint­ed. The Printer returns to the CP Mode and printing continues in the same
line from the current print position.

Note: Repeat data can cause a buffer full or overflow condition,

as

single characters.

41

well

as

Character

Printing

Mode 6

Repeat Printing

The DMP
a single character code up to
underlining, repeated block graphics, etc. The Repeat features use a three­code sequence:

• CHR$(28)

• The number

• The code to be repeated.

Type in this

10

20

30

40

Now RUN the program.

122333444455555666666777777788888888

Note: Depending on thecomputer, the second parameter (numberofrepeti­tions)
as

the TAB command, causing the print head to move to the next TAB posi­tion instead
your computer for details.

106

provides a built-in repeat capability. You can use it to repeat

255

times. It's great for repeating graphics codes,

of

repetitions.

new program:

LPRINT

print

FOR

LPRINT
NEXT

is

interpreted differently. For example, CHR$(9) may be interpreted

CHR$(30):REM

mode

1=1

TO

8

CHR$(28);CHR$(I);CHR$(I+48);

I

of

printing characters 9 times. Refer to the owner's manual

To

be

sure

in

character

of

Underline Printing

If

you need to underline any text in Character Printing Mode, send the

106

DMP
til you send a CHR$(l4) which stops underlining.

Underlineisaccomplished by two pass printing; this means the second pass
creates a continuous unbroken line after the first pass prints the characters
to be underlined.

If

a Print Head Positioning codeisreceived while the Printerisin an
underline-selected condition, the underline
position (left-most printing position) and the dot column position designat­ed by the Print Head Positio{ling code.

If

you enter Graphics Mode while the Printerisin an underline-selected con-

dition, when you return to the Character Printing Mode, the designation

underlineisthe sameasit

a CHR$(l5). All text that follows this code

is

not printed between the home

was

before entering Graphics Mode.

43

will

be underlined un-

of

Character Printing Mode

Table 16. Underline Printing

Send

(Dec) (Hex)

CHRS(

15
14

):

OF

DE

To:

Start Underline

Stop Underline

For example, type in this short program:

10

LPRINT

20

LPRINT

30

LPRINT

40

LPRINT

50

LPRINT

If

this example, line 20 turns on the underline and the first lineoftext

HA"Y'

BIJ.? I

off

and GI

CHR$(301;:REM
CHR$(151;:REM

"LEEWAY

CHRS(141;:REM

"GIVES

NESS

\iE~;

PF1OQUCTS)

GOODSER'v'ICE

BUSINESS

GOOD

SERVICE"

is

underlined. Line 40 turns the underline

is

CHARACTER

PRINTING

START UNDERLINE

PRODUCTS "

STOP UNDERLINE

not underlined.

(bJT

Print Head Positioning

In any mode, you can position the Print Head to a specific dot position.

Every otherPrint Head position

The characters stored in ROM can use the half step positions - you can't.

is

accessible through the position sequence.

Using the Normal character sets
line, but only half

(480) are accessible by you. The same

(10 CPI), there are 960 dot positions per

is

true for Com-

pressed and Condensed characters.

Table 17.

Character Width Dots-per-L1ne Available Columns

Normal 960 480

Compressed 1152 576

Condensed 1600 800

DMP

106

Print

Head Positioning

Elongated characters use the same dot columns, even though the characters

are printed twice as wide.
Even

if

underlineisdesignated, underline does not appear between the home
position (the leftmost printing position) and the position designated by the
Print Head Positioning code.

44

Chapter 6

To position the Print Head to a specific position, send a
numbers (we'll call them

nl

and n2) thatspecify the desired position. In other

(27

16),

then two

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 simple tell the Printer which dot column you
want.

4.

Tell the Printer what you want to print.

When you want to specify a dotcolumn where printing

(27

16)

first use CHR$ to send the

code. Follow this with another two-code

is

to begin, you must

sequence which specifies the position. For instance:

LPRINT CHR$(27);CHR$(
wherenlis

a value between

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

0-3

and n2isa value between 0-255.

Table 18. Print Head Positioning

If you wish

specify

dot

256-511
512-767
768-799

0-255

to

column:

n1

must

o

1

2

3

be:

n2

must

0-255
0-255
0-255

0-31

be:

Remember! Normal printing allows you to access dot columns up to

(n1=1,n2 =

575

to

(nl

=3,

Why two numbers
DMP

223);

Compressed printing allows you to access dot columns up

(nl

=2, n2 =

n2=31).

106

with one numberis255, and clearly you have more than

63);

Condensed printing allows you to access up to

(nl

and

n2)?

The maximum value you can send to the

dot positions available.

Those

of

you who are fansofbinary math

is

interpreting these two numbersasa single

two lower bits

ofnlare usedasb(8) and b(9).

will

recognize that the DMP

100bit

(b(0)-b(9»

value. The

45

479
799

255

106

Character Printing Mode

Note: Use

if

See
nl

=I gives

n2. Type:

as

10

and
Whoops! The asterisk printed

you need

10

and

this

Position is a little like a TAB,
you much [mer control. Although itis available
tial is greatest

If

you wanttomake a real messonyour paper, try:

10

20

30

40

50

Get

9.5"

wide paper for this next example.

you

can

print a character startinginposition 480inNormal

256

of

those dots,

LPRINT

RUN

to

LPRINT

RUN
program

LPRINT
FOR
LPRINT
CHR$(100+I*SIN(I/5»;

LPRINT
NEXT

outofthe double-width mode

CHR$(27);CHR$(16);CHR$(1);CHR$(224);"*"

the program.

leave enough

CHR$(27l;CHR$(16);CHR$(1);CHR$(218);"*"

the program.

with the different character densities.

in

Graphics Mode.

CHR$(27);CHR$(28);

1=1

TO

50

CHR$(27);CHR$(16);CHR$(1);

"*"

I

and

at

the left edgeofthe paper.

room

for theasterisktofitonthe endofthe line. Try:

That's

better.Iffits nicelyatthe endofthe

but

*:

..•.

*

:

*

*

*

.

*

.

.

480-256=224

it gets right

and

then

!

*

*

i

*

*

:*

.

*

.

.

*

*

RUN

i

**

***

.*

is the differencetobe sent

Hmmm!

downtothe

in

both

the

dot

level, giving

print modes, its poten-

program.

density.

Maybe

line.

Try

46

Character Printing Mode

Printing Directions

In

the Character Printing Mode, either bi-orunidirectional printingisselec-

table.

At

power ON, bidirectional printingisselected initially.Ifyou need
to select unidirectional printing, send a
ting, send a

(27850).

Table 19. Printing Direction Control Codes

Send CHR$(

(Dec) (Hex)

27

85

1 1B

27

85

0

1B

):

55
55

1

0

(27851);

and for bidirectional prin-

To:

Select Unidirectional
Select Bidirectional

47

Graphics Mode 7

In Graphics Mode, you no longer have pre-defined characters at your dis-

posal. You are responsible for the positioning and the action

Head.

106

The DMP

allows you to have direct, programmable control over all

the available graphic dots.
How manyacross the paperaddressable dot columns are there? That varies,

depending

10

LPRINT

2'~1

FOt~

30

LPRINl

40

NEXT

50

LPRINT

6v.1

FOF~

70

LPRINT

80

NE:xr

the character style you're using.

CHRt(27);CHR$(8S);CHR$(I);

1=1

TO 5

"Unidirectional

I

CHR$(27);CHR$(8S);CHR$(0);

N==1TO

1'·1

5

"Bidirectional

Printing"

See

Printing"

Table 20.

on

Now RUN the program.

Table 20. DMP 106 Print Head Positioning

Character Style Available Dot Columns

Normal 480
Compressed 576
Condensed 800

of

the Print

of

How many up and down (dot columns) addressable dots are there? The an-

is

swer
That means you can specify

(7

7.

x 800= 5600).

anyone

of

up to 5,600 individual dots

49

Graphics Mode

How do you printjust one (or two or three)ofthose 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 CHR$(l8) to put the DMP

3.

Send a CHR$(27);CHR$(l6) totell the Printer you want to position the

to

Print Head

4.

Tell the Printer in which dot column you wish to print.

is

This

a little more complicated and will be explained shortly. For now,

print a specific dot.

106

into Graphics Mode.

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
ways. Again, this will be explained in moredetail shortly. For now, just
keep this overall procedure in mind.

is

When you wantto specify a dot column where printing
first use CHR$ to send the

(27

16)

code. Follow this with another two-code

to begin, you must

sequence which specifies the position. For instance:

LPRINT

Wherenlis

If

you wishtospecify

dot

CHR$(27);CHR$(16);CHR$(nl);CHR$(n2)

a value between

Table 21. Graphic

column:

0-255
256-511
512-767
768-799

0-3

and n2isa value between 0-255.

Dot

Positioning

n1

must be:

o

1

2

3

n2 must be:

0-255
0-255
0-255
0-31

of

Remember! Normal graphic printing allows you to access dot columns up

(nl

=

1,

to 479

n2=223);

dot columns up to
you to access up to

Compressed graphic printing allows you to access

575

(nl

=2,

799

n2=63);

(nl=3,

Condensed graphic printing allows

n2=31).

50

Chapter 7

Even though dot columns greater than
er than 255. That is, CHR$(400)
a two-byte value.

For instance, to draw a vertical bar at dot column

10

20

LPRINT
LPRINT

CHR$(18)
CHR$(27);CHR$(16);CHRA$(0);CHR$(144);

255

exist, you cannot send values great-

is

not allowed - you must break it into

144,

try this program:

CHR$(255)

(Don't worry, that last CHR$(255)
In line

CHR$(27);CHR$(16) tells it to get ready to position the Print Head. (Note
that

Try this line to print a vertical bar at the rightmost available dot column

-799.

10,

CHR$(l8) puts the Printer into Graphics Mode and, in line 20,

CHR$(O)isnecessary.)

10

LPRINT

CHR$(27);CHR$(20);CHR$(18);CHR$(27);

will

be discussed shortly.)

CHR$(16);CHR$(3);CHR$(31);CHR$(25S);

What happens is:

106

• CHR$(27);CHR$(20) puts the DMP

• CHR$(18) puts the Printer into Graphics Mode.

• CHR$(27);CHR$(l6) tells the DMP
Head.

• CHR$(3) tells the Printer that the position will be greater than 768.

• CHR$(31) specifies the last available dot column.
Note:

If

you used CHR$(32) in this line insteadofCHR$(31), the DMP

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

into the Condensed character set.

106

to get ready to position the Print

106

Printing Graphics Patterns

By

now, you should be adept at positioning the Print Head. But you also

106

need to be able to tell the DMP

we

Remember that
can print any or all

Look back at the sample programs used when
positioning. Do you remember the last part
which always printed a vertical bar? That's an example
printed at once.

said there were 7 vertical dots in each dot column. You

of

these dots in any combination you want.

what to print once theHeadispositioned.

we

talked about Print Head

of

the program line (CHR$(255»

of

all 7 dots being

51

Graphics Mode

Try printing just the top dotofthat last dot column (799):

10

LPRINT
CHR$(16);CHR$(3);CHR${Jl);CHR$(129);

How does CHR$(129) print just the top dot?
Even though the 7 dots in a dot column are in a vertical row, they are not

numbered sequentially down from I to
system you must use with the

CHR$(27);CHR$(20);CHRS(18);CHR$(27);

7.

Table22describes the numbering

DMP

106

when specifyinganindividual dot:

Table 22. DMP 106 Addressable

Dot

#:

1
2

4

8

16
32

64

Dot:

Dot

Numbering System

Number You Must Use

To Print the Dot:

129

130
132
136

144

160

192

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$(16);CHR$(]);CHR$(]I);CHR$(192);

Thisisfineifyou want to printanindividual dot, but how do you print

of

a combination
That's

1.

actually quite simple, too.

Specify the Dot # (1-64,

dots?

see

Table

22)

that represents the individual dots

you want to print.

73+128

# 's together.

= 201. Use

64

= 73. Then

201

as the addressable dot pat-

2. Add those individual Dot

3.

Add the sumofthe combined Dot # 's to 128.

For example,

# 8), and the last dot (Dot # 64), add them together: 1+8+

add the sum (73) to

if

you want to print the first dot (Dot # 1), the fourth dot (Dot

128:

tern in the form CHR$(201):

10

LPRINT

CHR$(27);CHR$(20);CHR$(18);CHR$(27);

CHR$(16lICHR$(]);CHR$(]I);CHR$(201l;

52

Chapter 7

Remember how CHR$(255) printed a solid (all dots printed) vertical bar.
Tryout

the formula on that:

1+2+4+8+

The following sample program line
middle:

10

LPRINT

16+

32+64=127+128

=255

will

print a box with a line through the

CHR$(27)jCHR$(20)jCHR$(18)jCHR$(27)j
CHRS(16);CHR$(3)jCHR$(31);CHRS(25S);
CHRS(210)jCHRS(201';CHRS(201)jCHR$(201)j
CHR$(25S)j

Now try the following program.
Type in NEW

10

LPRINT

I

ENTER)

CHR$(18)

205=1:N=128
30

FOR

1=1

TO

20:5=-8

40

FOR

J=(2)

TO

6

80

IF

S<0

THEN

9(2)

LPRINT

100

NEXT

120

LPRINT CHR$(3(2)

RUN the program.Beprepared for a pause; it takes time to fill the print
buffer.

A.

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

This program alternately adds and subtracts powersoftwo to the current
code pattern stored in the variable N. The net effect
a single dot from the preceding dot pattern.

CHR$(N)j

J:NEXT

iIIio....uIIIIiI.....<JIIilI..

N=N+2A(6-J)

I

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

ELSE

N=N-2AJ

is

to add or remove

Line Feed

In Graphics Mode, itisassumed that you want to print rowsofgraphics
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

0.1

approximately
ing without unwanted space between lines.

inch. This small paper advance allows for continuous print-

53

Graphics Mode

The numbers can be stored in DATA statements. To conserve memory and
typing time, store the data
send them to the Printer. Enter these sample DATA lines:

NEW

I

ENTER

I

120

DATA

160

DATA

190

DATA

210

DATA

The 999's willbeused to signify the endofa line. The other numbers are
between 0and
send them to the Printer.

10

LPRINT

20

FOR

30

READ

40

LPRINT

80

LPRINT:NEXT R

90

LPRINT

100

LPRINT

Now RUN the program.
Not much

a number several times. A good approache
indicate the number

Add:

999

19,12,112,999

40,39,16,16,8,15,999

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

127.

Now for the programto read the numbers, add

CHR$(18)

R=l

TO

N:IF

CHR$(128+N);:GOTO
CHR$(30)

"DMP

to

brag about yet. Maybe what it needsisto be jazzedup to repeat

as

numbers from 0to127,

4

N=999

of

repetitions followed by the numbertobe repeated.

106"

THEN

80

30

is

to use negative numbers to

then add

128asyou

128,

then

120

130

180

Don't

DATA
DATA

DATA

RUN it yet!

17,33,33,34,-4,66,68,-4,4,-5,8,-5,16,

-5,32,-5,64,999

64,96,80,72,68,66,97,112,120,124,126,

-7,127,-5,126
95,79,71,67;65,32,16,8,4,2,1,O,1,2,4,

11,87,76

56

Chapter 7

In

line 120, the sequence - 4,66isusedtomean four 66s: 66,66,66,66. Now
modify the program to recognize the negative numbers.
Change:

40

IF

N>=0

50

READ

60

LPRINT

70

GOTO30

and RUN the program.
The figure still doesn't look like much. Add the remaining DATA lines and

see what you've been working on.

110

DATA

140

DATA

150

DATA

170

DATA

200

DATA

RUN the program.

THEN

LPRINT

CHR$(128+N);:GOTO

M

CHR$(28);CHR$(-N);CHR$(128+M);

-7,O,-2,96,80,-2,72,-2,-2,100,-2,114,

-2,57

-5,124,-2,120,-3,121,-2,113,-3,114,98,
98,-2,100

-2,116,92,88,72,64,32,32
5,5,3

127,-4,64,3,-3,2,3,-5,7,-5,15,-5,31,

-5,63,-6,127

-5,O,-5,1,-5,2,-5,4,-5,8,-5,19,-5,38,

-4,64,127,32,32

16,80,104,72,

L

30

Now

that's

worth the effort!

57

mM

Emulation Mode

1_

Description

of

the

mM

Emulation Mode

The DMP
control code set and the other

sets are independent

Code set selection
The IBM emulation modeisprovided to use with the IBM code set. You

can select it by setting DIP switch 1to ON and then turning the power ON.

If

you send a CHR$(27);"!", it resets the Printer to the defaultofTandy

mode. (Refer to Appendix A.)
The IBM emulation mode does not support serial interface.

your computer to a serial interface, any attempt to select IBM emulation
mode

Character set selection
Two different character sets (not character styles) are also provided in the

DMP
set (refer to Appendix
ing to the setting
selects the Tandy character set, while setting it ON (IBM emulation mode)
selects the IBM character set.

When an IBM character set
character set 2by sending the control codes CHR$(27);"7" with DIP switch
3 OFF (set

When CHR(27);
a high bit set are interpreted to be control codes and not printable characters.

106

has two different control code sets; oneisthe original Tandy

is

the IBM control code set. These two-code

of

each other.

If

you connect

will

be ignored.

106;

oneisthe Tandy character set and the otheristhe IBM character

C). Each character set

of

DIP switch1.Setting DIP switch 1to OFF (Tandy mode)

is

selected, you can designate character set 1 or

1)

or CHR$(27);"6" with DIP switch 3 ON (set 2).

"7"isreceived with DIP switch 3 OFF, control codes with

is

automatically selected accord-

is

When CHR(27);"6"
a high bit set are interpreted to be printable characters.

received with DIP switch 3 ON, control codes with

Carriage Return

The code CHR$(l3) orCHR$(27);CHR$(l3) prints the buffer contents and
then moves the printing position to the leftmost dot position.

is

A line feed

executedifDIP switch 4isset to OFF (CR with LF).

59

IBM

Emulation Mode

When
CHR$(27);"5";CHR$(0) is set;
formed

CR

is received,

if

CHR$(27);"5";CHR$(1)isset.

only

a

both

carriage
carriage return

return

is

performed

and

line feed are per-

Vertical Formatting Control Codes

Setting the line feed pitch
The

LF

pitch is setto1/6
CHR$(27);"0", CHR$(27);"1", CHR$(27);"2", CHR$(27);"3"
mand

CHR$(27);"A".

liS-inch
The control code CHR$(27);

7/72-inch line feed
The control code CHR$(27);" 1" changes the line feed distance to 7172 inch.

Variable line feed
The control code

CHR$(27);"A"
CHR$(27);"A"

If

to

line feed

no

CHR$(27);"A"

1/6

inch.

command.

commandisexecuted after the

inch unless you change it by sending the command

or

the com-

"0"

changes the line feed distanceto1/8

CHR$(27);"2"

That

command has been given, the line feed distanceisset

is

an

is, the

execution command for the

LF

pitch designated by the

CHR$(27);"2"

command.

inch.

if

Useful Hint:

If

you wanttoreturn theLFpitchto1/6

to

spacing has been set
code

CHR$(27);"2"

pitch will returnto1/6
Setting the variable pitch line feed

The control code CHR$(27);"A";CHR$(n) defines theline feed pitch inincre­ments

of

1/72 inch. nisa single-byte binary number and can represent any

value between one
to

7172 inch by designating n as 7.

This command

code

CHR$(27);"2"tochange the line feed pitch.

Enter the following program:

is

7172 inch for the bit image mode, send a control

only (without a

inch.

and

85.

For

bit image graphics, line spacing can be set

onlytodefine theLFpitch; you needtosend a control

inch when, for example, the line

CHR$(27);"A"

command). The

LF

60

10

LPRINT

20

LPRINT

30

LPRINT

40

LPRINT "HALF LINE FEED

CHR$(27);"A";CHR$(61;
CHR$(271;"2"

"NORMAL

SPACING LINE FEED"

IS

EXECUTED"

Chapter 8

Setting the variable line feed

The controlcode
inch. n is a value between 1

Since the Printer has a minimum line feed pitch

feed pitch

Variable line feed execution

The

control code

termined
Since the

feed pitch

Execution command for line feed

The code CHR$(lO)

feeds the paperone line. Thepaper feed distanceisspecifiedbythe line spac­ing set commands (mentioned above). This command will terminate a double­width print mode set

Setting top-of-form and form length

The
bidirectional tractor feedisused. The control code CHR$(27);"C";CHR$(n)

sets the lines per page

CHR$(m) sets the inches per page.
represent anyvalue between one
ber
tion
The top-of-form position can also be set

CHR$(27);"4".

by
Printer

form length can be changedatany timeifeither the friction feed

and

can represent anyvalue between

is

setatthe current line after a form length setting commandisexecuted.

CHR$(27);"3";

is

in multiplesof1/144 inch.

CHR$(27);"J";CHR$(n)

the value

has a minimum line feed pitchof1/144",

isinmultiplesof1/144 inch.

or

by

The form length is setto11

(n/216")

CHR$(n) sets the line feed pitch to n/216

and

255.
of

1/144",

(n/216")

executes a

of

n. n

is

a number between 1

CHR$(27);CHR$(1O) prints

code14or

and

code sequence (27 14).

the control code CHR$(27);"C";CHR$(O);

n

is

a single-byte binary number

and

127. misalso a single-byte binary num-

one

and

at

the current line by sending

inchesatpower

n/216"

and

out

the character

22. The top-of-form posi-

the actual line

line feed de-

255.
the actual line

and

ON.

and

can

or

61

IBM

Emulation Mode

Vertical tabulation
When a controlcode

prints out the buffer contents and feeds the paper to a predetermined verti­cal TAB position set by the CHR$(27);"C"; sequence.

is

position
Form feed

When a control code CHR$(l2) or CHR(27);CHR$(12)

prints out the buffer contents and feeds the paper to the next top-of-form
position.

Skip perforation
The skip perforation function can be set by the CHR$(27);"N"; CHR$(n)

command.
number and can represent any value between one and
terminated bythe CHR$(27);

If

you want to print60lines per page on a sheetofII-inch paper, RUN the

following program:

10

The 61st lineisprinted on the next top-of-form without a form feed
command.

predetermined, this code functions the same as an LF code.

n designates the number

LPRINT

CHR$(ll)

CHR$(27);"N";CHR$(60);

or CHR$(27);CHR$(II)isissued, the Printer

If

no vertical TAB

is

issued, the Printer

of

linestoskip. nisa single-byte binary

127.

This function

"0"

command orthe form length set command.

is

Horizontal Formatting Control Codes

Horizontal tabulation
With horizontal tabulation, you can easily align sections horizontally. The

16

maximum

is

column0)by using the following control codes:

gin

CHR$ (27);
CHR$ (nk); CHR$

n indicates the horizontal column position and can represent any number

between I and 80 for lO-pitch mode, 1 and

133 for Condensed mode; column positions should be designated in ascend-

ing order. When all TABs have been selected, send a null code
to terminate the horizontal TAB designation. Once the TABs are set, send

horizontal TAB stops can be set to any column (the left mar-

"D";

CHR$

(nl);

CHR$ (n2)

(0)

62

...

96

for 12-pitch mode, and 1 and

(CHR$(O»

Chapter 8

control code CHR$(9) or CHR$(27);CHR$(09) to skip to the next right TAB
position.

is

• When TAB stops are not set, control code CHR$(9)
if

• During horizontal TAB setting,

if

ing order, or
setting should be terminated.

• All the previously set TABs are cleared by designating new TAB stop po-

sitions.

• Horizontal TAB stops are set at every 8th column when the Printer

wered ON.

Reset all TABs

the numberofTABsismore than

TAB stops are not entered in ascend-

ignored.

16,

horizontal TAB

is

po-

The code CHR$(27);"R" restores all TAB columns to the default value
every 8th column.

Backspace
CHR$(8) or CHR$(27);CHR$(8) causes the printhead to backspace the length

of

one character after printing the current buffer contents.Ifproportional

is

spacing
a space (ASCII 32,20hex).

Home head

If

you send the code sequence CHR$(27);CHR$(60), the print head

to the left margin to print a line. This will occur for one line only.
Set left/right margin

Left
CHR$(27);"X";CHR$(nl);CHR$(n2) command.

nl

indicates the left margin and n2 indicates the right margin, counting from

the leftmost column.

selected, the lengthofthe backspaceisthe same as the length

and

right

margins

can

be set

simultaneously

will

return

by

of

of

the

Printing Mode Control

In IBM emulation mode, you can printelongated, condensed, bold, and em­phasized characters; you can also print in super- or subscript mode, bit im­age mode and so on. Use these various print styles to print a title or to
highlight effectively in the character printing mode.

63

IBM

Emulation Mode

Double-width printing
In

double-width printing mode, the widthofa printed characterisdoubled;
the pitches
printing can be executed via CHR$(l4)
CHR$(27);"W";CHR$(l). When this modeisestablished with CHR$(l4)
or

CHR(27);CHR(l4), itisreleased by CHR$(20), CHR$(27);CHR$(20),
CHR$(27);"W";CHR$(0), a carriage return
lished

CHR$(27);"W";CHR$(0) only.

For

10

20

Now RUN the program.

of

horizontal TABs and spaces are also doubled. Double-width

with

instance, enter the following program:

LPRINT
LPRINT "TEXT

CHR$(27);

"W";

CHR$(l),

CHR$(271;CHR$(141;"TITLE"

PRINTING"

or

CHR$(27);CHR$(l4)

or

a line feed; when itisestab-

it

is

released

or

by

TITLE

TEXT

and RUN it. TITLEisprinted in double-width character mode, but TEXT
PRINTING
results with the results

PRINTING

is

not since a LF took place at the endofline

of

the following program:

10.

Compare these

10

LPRINT

20

LPRINT "TEXT PRINTING"

Selecting to-pitch (pica) mode
When thecode CHR$(l8), CHR$(27);CHR$(l8)

to the Printer, lO-pitch will be selected.
Condensed printing

In

the condensed printing mode, dot density can be condensed from 11120

inch to 11200 inch, and lO-pitch
and spaces are condensed, too. Condensed printing can be selected with
CHR$(l5)
CHR$(27);CHR(18)orCHR$(27);"M".

Note: Condensed printingissuspended in bit imageoremphasized printing
mode; when the Printer exits either
restored.

CHR$(271;"W";CHR$(II;"

is

changed to 16.7-pitch. Horizontal TABs

or

CHR$(27);CHR$(15),

or

and

released with

of

these modes, condensed printing

64

TITLE

CHR$(27)i;"M"issent

"

CHR$(l8),

is

Type in the following program:

10

20

and

LPRINT
LPRINT

RUN it.

CHR$(1S);

"THIS

Data

IS

can be printed with upto133

THISISCOMPRESSED

Selecting 12-pitch mode

Chapter 8

COMPRESSED"

characters in a line.

When thecode
Proportional spacing

Proportional spacing OFF
When the code CHR$(27);"P";CHR$(0)

tents are printed out and the font
Proportional spacing

When the code CHR$(27);"P";CHR$(1)issenttothe
rent buffercontents are printed out andthe font
al spacing font.
Emphasized printing

Emphasized printing
In theemphasized printing mode, each character is printed once

mal printing line, and again with a small shift vertically. This emphasized
printing mode
celled by CHR(27).

Enter the following program:

10

LPRINT

20

LPRINT

30

LPRINT

40

LPRINT

and

RUN the program.

CHR(27);":"issent to the Printer, l2-pitch will be selected.

ON/OFF

is

received, the current buffer con-

is

changedtoa monospaced font.

ON

DMP

106, the cur-

is

changedtoa proportion-

is

executed simultaneously.

on

the nor-

is

established by the control code,

"F".

The printing speedisreduced to halfin this mode.

CHR$(27);"E",

and can-

CHR$(27);"E";
"Emphasized

";
CHR$(27);"F";
"Printing"

Elphasized

Printing

65

IBM

Emulation Mode

Double-strike printing
In the double-strike printing mode, characters are printedtwice

on

the same
position throughtwo-pass printing; therefore, highlighted characters can be
printed not only by bold printing, but also bythe double-strike printing mode
which only slightly intensifies the appearance

is

mode

established by CHR$(27);

"G",

of

designated characters. This

and cancelled by CHR$(27);

"H"

Superscript and subscript

DMP

With your
superscript mode, a character

ter line, and in subscript mode, a character

106, you can print superscript and subscript characters. In

is

printed onthe upper halfofa normal charac-

is

printedonthe lower half

of

a normal character line. The superscript printing modeisestablished by

is

CHR$(27);"S";CHR$(O), and the subscript printing mode

established by
CHR$(27);"S", CHR$(1). Both superscript and subscript can be cancelled
by CHR$(27);

This function

"T"

.

is

useful for printing algebraic expressions.

Try the example program below:

Hl

20
30
40
50

60

7'1

80

90

LPRINT

LPRINT

LPRINT
LPRINT
LPRINT
LPRINT
LPRINT
LPRINT

LPRINT

"Y=AX";

CHR$(27);"S";CHR$(0);

11

113

CHP$(27);

II

1I=f,X

;

uT

It

;

CHR$(27);"S";CHR$(0);

u

""':1

U •

,

....

CHR$(271

; "T" ;

"+C"

.

and RUN the program.

Y=AX':3
=:BX2+C

66

Chapter 8

Underlining
In the underlining mode, all characters, spaces and the spaces which are

moved by horizontal TABs (except bit image
be underlined. This mode
celled by CHR$(27);"-";CHR$(0). Underlining
pass printing.

Type in the following program:

10

20

LPRINT

LPRINT

"THIS

CHRS(27);"-";CHRS(1);"UNDERLINE";

is

established by CHR$(27);"-";CHR$(l), and can-

FUNCTION

CHRS(271;"-";CHRS(01;

30

LPRINT "

and

RUN it.

THIS

FUNCTION

UNDERLINE

The word UNDERLINEisprinted with an underline.

Bit image mode

There are four kinds
of

dot

image consistsof8-bit data. Each mode has its particular horizontal

dot density, and its maximum number

WITH

WITH

TEXT

CAN

TEXT

of

bit image modes in the

AUTOMATICALLY"

PRINT

AUTOMATICALLY

data

and graphic symbols) will

is

accomplished through two-

CAN

PRINT"

DMP

106. One vertical line

of

bitsona line, as indicated below:

Mode

480 Bit Image

960

Bit Image

960 Bit Image

(Normal Speed)

1920 Bit Image

480 bit image mode:
In

480 bit image mode, horizontal dot (bit) densityis1160 inch. The code

of

sequence

CHR$ (27);
CHR$ (vK)

nI,

n2 are the numbers

single-byte binary number;
upper

data

tal

this modeisas follows:

"K"; CHR$

partofthe value. Therefore, the actual value

number

(nI,

(nI);

CHR$ (n2); CHR$

of

the horizontal dot positions. Eachofthemisa

nI

is

the lower partofthe value and n2isthe

n2) should not exceed 480.

Number of Bits/Line

480 Bits/Line

960

Bits/Line

960 Bits/Line
1920 Bits/Line

is

67

(vI);

...

nI

+256 xn2. The to-

IBM

Emulation Mode

vI

through vK represent the dot patterns for each vertical1ine and single-

byte binary number. Unlike in the Tandy mode, the dot patterns are num­bered from bottom to top:

128

64

32

16

8

4

2

1

Add the numbersofthe dot patterns you want to print to obtain the

data

forvIthrough vK.
960 bit image mode:
In

960 bit image mode, horizontal dot (bit) densityis1/120 inch. The code

sequence

CHR$ (27);

of

this modeisas follows:

"L";

CHR$

(nl);

CHR$ (n2); CHR$ (VI);

...

CHR$ (vK)

The total data number

(nl,

n2) should not exceed 960.

960 bit image mode (normal speed)

is

In 960 bit imagemode (normal speed), the dot density
The difference between these two 960 bit image modes

equally 1/120inch.
is

equivalent to the
difference between boldfaced characters and normal characters. The code
sequence

CHR$ (27);

of

this modeisas follows:

"L";

CHR$

(nl);

CHR$ (n2); CHR$

(vI);

...

CHR$ (vK)

The total data number

(nl,

n2) should not exceed 960.

1920 bit image mode:

In

1920

bit image mode, horizontal dot (bit) densityis1/240 inch. The bits

on

the same vertical1ine are printed every third position in this mode. The

code sequence

CHR$ (27);

of

this modeisas follows:

"Z";

CHR$

(nl);

CHR$ (n2); CHR$

(vI);

...

CHR$ (vK)

The total data number

(nl,

n2) should not exceed 1920.

68

Chapter 8

Other Control Codes

Paper end detection

The FAULT signal to the interface, when a paper end conditionisdetected,

By

can be turned ON or OFF.
tion, the last printable line on the paper can be printed without a device fault
on the external terminal. The FAULT signal
(ignore paper end), and
paper end).

Cancel

CHR$(24) or CHR$(27);CHR$(24) clears the data in the print buffer that
was

received prior to this command; the other control codesthat

prior to this control code remain in effect.

Unidirectional printing

combining this function with an override func-

is

inhibited by CHR$(27);"8"

is

made available by CHR$(27);"9" (cancel ignore

were

received

Usually, the DMP
lows you to print by using a unidirectional printing method to avoid slight

vertical misalignment.
perfectly. This function
CHR$(l), and cancelled by CHR$(27);"U";CHR$(O). When only a small
number
characters on a page in the unidirectional mode decreases the efficiency
the DMP

ters in the unidirectional mode. This code
one line which follows this code

Printing characters below 20 hex

The code sequence CHR$(27);"-";CHR$(n) prints the character assigned
to
(20 hex) will be printed instead.

of

n when n

characters are to be printed unidirectionally, printing all the

106.

is

106

executes bidirectional printing, but this Printer al-

By

using this function, you can print a chart or a graph

is

executed by the code sequence CHR$(27);"U";

of

Use the code CHR$(27);"<"to print only specific charac-

is

below20hex.Ifthereisno character assigned to n, a space

is

cancelled by CHR$(13); only

printed unidirectionally.

69

Appendices

Control Code

Tandy Control Codes

Code

Dec. Hex.

()()

01

138

141

27

27

27

nl

27

27
20

27
21

27
22

()()

01

OA

10

or

or

8A

OD

13

or (When NL, LF pitch

or

8D

14

OE

15

OF

18

12

IB Start Double-width Start Double-width

14

OE
IB

15

OF

IB10Positioning(3pitches Positioning(3pitches

16

nl

n2

1B

19

13
IB

14
IB

15
IB

16

Character Printing

Mode
Ignored
Ignored Ignored
Executive Line Feed

(Execute LF in accord­ance with information (Executive) 8A hex.:
latched)

Carriage Return
latched one.) per line.)

End Underline Ignored
Start Underline Ignored
Select Graphics Mode Ignored

End Elongation End Elongation

n2

are available.)

indicate dot position indicate dot position

from Home position.)
Select Standard

Character

Select Condensed

Character
Set

CR=CR

(No motion)

Set

CR=LF+CR

(No motion)

(NL)

(nl,

n2

Summary

Graphics Mode Remarks
Ignored

H

7/72

Line

Feed
Printing data

Carriage Return (When
NL, LF pitch

is

8D hex.: Printing data

are available.)

from Home position.)
Ignored

Ignored

Ignored

Ignored

is

(nl,

7172 H

n2

NLiCR
Selectable

nl,

n2:

value

.**

A

Code

Binary

73

Control Code Summary

Code

Dec. Hex. Mode

27

IB

23

27

28

27
31

27
32

27

33

27

52

27

54

27

56

27

58

27

59

27

83

27

83

27
85

27
85

27
88

17

IB
lC

IB
IF

IB End Bold Ignored
20

IB
21

IB Form Length Set Ignored
34

n n

IB Set Full Forward Ignored
36

1B

38
IB

3A Character Set Character Set

1B

3B

IB Select Superscript
53

0 0

IB
53

1

IB
55

0 0

1B

55

1

IB End Super-/Subscript
58

Character Printing

Select Compressed Ignored
Character

Set

Half

Forward
Line Feed
(No motion)

Start Bold Ignored

Enters IBM Mode

Line Feed (No motion)
Set

3/4

Line Feed (No motion)
Select IBM Select IBM

Select Tandy Select Tandy
Character Set

Character

Select Subscript

Character

1

Select Bidirectional

Printing

Select Unidirectional
Printing

1

Character

Forward Ignored

Graphics Mode

Ignored

Enters IBM Mode

Character Set
Ignored

Ignored

Ignored

Ignored

Ignored

Remarks

74

Appendix A

Code Character Printing

Dec. Hex. Mode

27

IB

n/72"

90

SA Line Feed

Forward

n n (Executive)

27
91

lB Set

5B

n/72"

Line Feed

Forward

n n (No motion)

28

1C Repeat Print Data

nl

n2

nl

n2 (Undefined Code

changed to X)

30

IE Ignored

Other Codes Prints X
in Function
Area

(02

dec.)

(02

(128

192

dec.)

DF hex.)

to

to

to

(80

31

to IF hex.)

Other Codes Prints X
in Function
Area

159,
223
to 9F,COto

Graphics Mode Remarks
n172" Forward

Line Feed
(Executive)

Ignored

Repeat Print
Data (IF

is

is
End Graphics Mode
Ignored

(Printing Data)

ignored.)

MSB

= 0, Data

75

Control

Code Summary

IBM Control Codes

Dec. Hex. ASCII Function
00
08
09 09

10

11

12
13
14
15

18
20
24
27+08
27+09
27+

10

27+

II

27+12
27+

13

27+

14

27+

15

27+

18

27+20

27+24

27+33

27

+45

27

+45 + 1

00
08

OA
OB
OC
OD
OE
OF

+0

12
14
18
IB+08

IB+09

IB+OA

IB+OB
IB+OC

IB+OD

IB+OE

IB+OF

IB+

12

IB+

14

IB+

18

IB+21
IB+2D+00

IB+2D+Ol

NULL
BS
HT
LF
VT
FF
CR Carriage Return
SO
SI
DC2
DC4 Stop Double-Width Printing
CAN Clear Printer Buffer
ESC+BS
ESC+HT
ESC+LF
ESC+VT
ESC+FF
ESC+CR
ESC+SO

ESC+SI

ESC+DC2

ESC + DC4

ESC+CAN

ESC+!
ESC + - +

NULL
ESC + - +

SOH

Terminator

Backspace
Horizontal Tab
Line Feed
Vertical Tab (same as LF)
Form Feed

Double-Width Printing
Select Compressed Mode
Select IO-Pitch Mode

Backspace (sameasBS)
Horizontal Tab (same as HT)
Line Feed (sameasLF)
Vertical Tab (sameasVT)
Form Feed (same as FF)
Carriage Return (sameasCR)
Double-Width Printing (same as

SO)
Select Compressed Mode (same as

SI)
Select IO-Pitch Mode (same as

DC2)

Stop Double-Width Printing (same
as DC4)

Clear Printer Buffer (same as
CAN)

ReturntoTandy Mode
Cancel Underline

Set Underline

76

Appendix

A

Dec.
27+48
27+49
27+50

27+51

+n

27+52
27+53

+00

27+53+01
27+54
27+55
27+56
27+57
27+58
27+60

27+65+n
27+67+n

27+67

+ 0 + m 1B+43+

28+68+nl

+ ...

+00
27+69
27+70
27+71
27+72

27+74+n

27+75

+nl

+n2

27+76

+nl

+n2

27+77

27+78+n

27+79

Hex.

IB+30
1B+31
IB+32

IB+33+n

IB+34
1B+35+00

1B+35+01
1B+36
1B+37
1B+38

IB+39

1B+3A

IB+3C

IB+41

+n

1B+43+n

+m

IB+44

+nl

+ ...

1B+45

IB+46
1B+47
1B+48
1B+4A+n

IB+4B

+nl

+n2

1B+4C

+nl

+n2

1B+4D

IB+4E+n

IB+4F

ASCII Function
ESC+O
ESC+l
ESC+2
ESC+3+n
ESC+4
ESC+5+

NULL CR Only
ESC+5+S0HCR=NL
ESC+6
ESC+7
ESC+8

ESC+9

ESC+:
ESC+<
ESC+A+n
ESC+C+n

ESC+C

00

+NULL+m

ESC+D+nl

+00

+ ... + NULL
ESC+E
ESC+F
ESC+G

ESC+H
ESC+J

ESC+K

+nl

ESC+L

+nl

ESC+M

ESC+n+n
ESC+O

+n

+n2

+n2

1/8"

Line Feed Set

7/72"

Line Feed Set
ESC A Execution
Variable Line Feed
Set TopofForm

(CR+LF)
Select Character Set 2
Select Character Set I
Ignores Paper End
Cancel Ignore Paper End
Select12Pitch
Home Head
Set Variable Line Feed
Set Lines Per Page

Set Inches Per Page

Set Horizontal Tab Stops
Set Emphasized Mode
Cancel Emphasized Mode
Set Double-Strike Mode
Cancel Double-Strike Mode
Variable Line Feed Execution

60

DPI Bit Image Mode

120

DPI Bit Image Mode

Select 10-Pitch Mode (same
DC2)

Set Skip Perforation
Cancel Skip Perforation

as

77

Control Code Summary

Dec. Hex. ASCII Function
27+80+00

27+80+01

27+82
27+83+00

27+83+01

27+84
27+85

+00

27+85+01

27+87

+00

27+87

+01

27+88

+nl

+n2

27+89

+nl

+n2

27+90

+nl

+n2

27+94+n

Other codes in Func­tion Area
(01toIF

IB+50+0

IB+50+

IB+52
IB+53+00

IB+53+01

IB+54
IB+55+00

IB+55+01

IB+57

IB+57+01

IB+58

+nl

+n2

IB+59

1

+00

ESC+P

+ NULL

ESC+P

+ SOH
ESC+R
ESC+S

+ NULL
ESC+S

+ SOH Set Subscript Mode
ESC+T
ESC+U

+ NULL Cancel Unidirectional Printing

ESC+U

+ SOH Set Unidirectional Printing
ESC+W

+ NULL Cancel Double-Width Printing
ESC+W

+ SOH
ESC+X

+nl

ESC+Y

+nl+n2 +nl+n2

IB+5A

+nl

+n2

IB+5E+n

and 7F hex.)

ESC+Z

+nl

ESC+~+n

+n2

+n2

Proportional Spacing

Proportional Spacing On
Reset All Tabs

Set Superscript Mode

Cancel Super-/Subscript Mode

Start Double-Width Printing

Set Left/Right Margin
120

DPI Bit Image Mode in Nor-

mal Speed

240

DPI Bit Image Mode
Prints Characters Below20Hex.
Ignored

Off

78

Parallel Interface

Interface Connector

Type 36-Pin Receptacle
Model 552742-1 or equivalent

AMP

__

or equivalent

._-

Manufacturer

Pin

Assignment

18

_.

-------

Interface B

Signals

Signal

Pin

Name

of

1 STROBE

DATA 1 20

2

DATA 2

3

DATA 3 22

4

DATA 4 23

5

DATA 5 24

6

DATA 6 25

7

DATA 7 26

8

DATA 8 27

9

ACK 28

10

BUSY 29 oV (Return for

11
12

PE

(Paper Out) 30

13 BUSY

OV

14
15

NC (Not Connected) 33 INIT

OV

16
17 CHASSIS GROUND
18

+5 V (80 mA Maximum) 36 NC

Signal

36

s~l~al

NameofSignal

19

oV (Return for
oV (Return for

21

oV (Return for
oV (Return for

oV (Return for
oV (Return for
oV (Return for
oV (Return for
oV (Return for
oV (Return for

OV

31

NC
(Not Connected)
FAULT (Printer Error

32

Condition)

34 NC

(Not Connected)

35 NC

(Not Connected)
(Not Connected)

19

1)

2)

3)

4)

5)

6)

7)

8)

9)

10)

11)

79

Interface

Parallel Interface Signals

DATA

BIT

1-8

=:><,.....,.--

--1

DATA

STROBE---~-;

__

i0.us

,--

min.

'---1-.

5-.u-s-m-in-.

-----~

..J

X

'-

_

BUSY

__

I

-!I

-j

<-1-;-

I---..,.r

I.

__

O.us

min.

I I I

~I

I

Timing Diagram

DBI-DB3 - Host Generated

DataBits DBI-DB8 contain ASCII character data information. Databit levels

are positive true logic.

ACKNOWLEDGE - Printer Generated

The ACK signal

is

no longer busy.

BUSY - Printer Generated

The BUSY signal goes positive to indicate when the Printer cannot accept
new data from the Host, or some Fault condition has occurred. Timing
illustrated in the Timing Diagram.

PAPER

The paper out signal
is

OUT (PE) - Printer Generated

outofpaperorthat

is

a negative-going signal which indicates

is

a positive-going pulse which indicates that thePrinter

the Printerisnot readytoreceive data.

I I I

~~I

5.us

5.us

that

the Printer

is

BUSY - Printer Generated

is

The BUSY signal

the logical inverseofBUSY.

80

Appendix B

FAULT-Printer
The

FAULT
dition present;Le., paper out, logic fault, off-line condition,
ical fault.

STROBE -

The

STROBE signalisa negative-going signal which indicates, by
edge,

CHASSIS

This lineisconnectedtothe
5 V - Printer Generated

This line is connected
Maximum supply current

INIT-Host
The

INIT

printer controller
is available only in IBM mode.

Parallel Interface Receivers

I/O

All

Receiver

lineisa negative-going signal

that

the

GROUND

signalisa negative-going 50-microsecond pulse, which resets the

Signals are TTL-compatible.

8

when

Generated

Host

Generated

Host

Generated

to

mA

max·l

low

sends

datatothe Printer.

chassisofthe Printer.

to

the

Printer's

is

80 rnA.

its initial state

and

1

kG

that

indicates thereis a fault con-

logic +5 V line.

and

clears the print buffer. This signal

Drivers

To Printer

or

other mechan-

the

rising

+sv

Driver

+sv

r2.2

kG/1

>----KJI-----O

1:

mA

min.

when low

Note: Printer-generatedsignals, BUSY,

kohm

a 2.2

pull-up resistor.

Open Collector

81

FAULT,

From Printer

PE,

BUSY, and ACK,have

Interface

Serial Interface (For Tandy mode only)

Serial Interfaceisselected by setting FunctionSelection Switch 2 to ON, and
1 to OFF.

Transmission Rate
Function Selection Switch

is

selected from two rates (600 BPS and 2400 BPS) by

3;

OFF designates 2400 BPS and ON designates

600 BPS.
General Specifications

of

Serial Interface

Standard Meet with RS-232C Serial
Baudrate

600or2400 BPS Serial

Parity Non-parity
Buffer Up to
Data

Bit 8

148

characters

Start Bit 1 Space bit
Stop Bit 1
Signal Cable

or

2 Mark bits

15

m Max.

Interface Connector and Signals

Type

A-Pin

DIN Jack (Receptacle)

Model TCS 4640-01A
Manufacturer HOSHIDEN CO., LTD.

equivalent

Pin

Assignment and Signals

Pin No.

1

2

3

4

or

equivalent

Signal

NS

BUSY

GND (0

DATA

or

V)

DATA

Signals

data

to the Printer.

-

To

Printer

on

this circuit are generated by the Computer for transmission

82

of

Appendix B

BUSY - From Printer
This signal indicates to the Computer whether or not the Printer can accept

is

data. The OFF condition (low) indicates that the Printer
not accept any more data.

Interface Timing and Signal Level

BUSY

and can-

DATA

BUSY

G!'JD~

Baudrate

600 BPS

2400 BPS

+3

-25

V ~ V

V~V

1.67

1.417

H

~

L

f1

+25

~

-3

msec.
msec.

(SPACE)

V (MARK)

f2

0.83 msec.

0.208 msec.

Remarks on Serial Interfacing Conditions

• When a Framing ERROR

is

detected, the Printer

will

print only one X

data, then stop printing until the data line goes toVL. In Graphics Mode,
this X data

unprintable code, so no printing

will

be performed.

is

• The Printer checks only the first stop-bit and ignores the second stop-bit
when a two-stop-bit condition exists.

of

• When a string

if

Mode,

each itemofdataistransmitted intermittently (everyone second

or more), printing

dataistransmitted to the Printer in Serial Interfacing

will

be performed every second.

83

Character

Tandy Character Sets

The DMP
The following

The printable characters may be classified as follows.

• Condensed or
Condensed Elongated

• Compressed or
Compressed Elongated

• Standard or
Standard Elongated

106

has

158

dot-matrix patternsin the ROM (Read Only Memory).

is

a tableofthe Character Codes.

ASCII
European Symbol
Block Graphic

Sets

C

95
32
31

85

Character Sets

95

ASCII Code

Code Char. Code Char.

Dec.

Hex.

Oct.

32

20

40

(Space)
33
34
35
36
37
38
39
40
41
42

43

44
45
46
47

48

49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

41

21

42

22
23

43

24

44

25

45

%

26

46

27

47

28

50 (

29

51

2A

52

28

53

2C

54

20

55

-

2E

56
2F 57
30

60

31

61
32

62
33

63 3 83 53

34

64
35

65

36

66
37

67

70

38

71

39
3A

72

38

73
74

3C
3D

75

3E

76
3F n

I

"

#

$

&

.

)

.

+

,

I

0)

1
2

4 84 54
5 85

6

7 87
8 88
9

:

;

<

=

>

?

Note: The following characters descend byone dot: Small Letters

(Underline),;

ASCII Character Sets

Dec.

Hex.

Oct.
64
65
66
67

68

69

70
71
72
73
74
75
76

77

78
79

80

81
82

100

40
41

101

42

102 8
103 C

43

104 0

44
45

105

46

106 F

47

107

48

110

49

111
112

4A

48 113 K 107

114

4C

115

40
4E

116
117

4F

120

50
51

121

52

122
123

124

125

55
56 126

86

57

127
130

58
89
90
91
92
93
94
95

131

59

132 Z

5A

133

58

134 \ 124

5C

135

50

136

5E

5F

137

Dec.

@

96

A 97

98

99

100

E

101

102

G 103

H

104

I

105
106

J

L

108

M

109

N

110
111

0

P 112

Q 113

R

114
115

S

T

116

U 117

V

118

W

119

X

120

Y

121
122

[

123 78 173

125

I

1\

126

-

Code

Hex.

60

61
62
63

64

65

66

67

68

69

6A

68

6C

60

6E

6F

70

71

72

73
74
75

76

n

78

79

7A

7C

70

7E

Oct.

140
141
142 b
143
144
145
146 f

147
150
151
152 j
153 k
154 I
155
156
157 0

160
161
162
163

164 t

165
166
167 w
170
171
172

174
175 )
176

Char.

•

a

c
d
e

9

h

i

m

n

P

q

r

s

u

v

x

Y

z

[

I
I

-

g,p,q,y,j,

86

32 European Symbol Code

Appendix C

Standard, Compressed

Code Char.

Dec.

Hex.

Oct.

160

AO

240

161

A1

241

162

A2

242

163

A3

243

164

A4

244

165

A5

245

166

A6

246

167

A7

247

168

A8

250

169

A9

251

170

AA

252

171

AB

253

172

AC

254 '/4

173

AD

255

174

AE

256

175

AF

257

or

Condensed Character Set

Code

Hex.

BO
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
BB
BC

BD
BE
BF

OCt.

260
261
262

263
264
265
266
267
270
271
272
273
274
275
276
277

Dec.

176

/

177

a

178

~

£

179
180
181

p.

0

182

'I'

183

184

t

§

185

®

186
187

©

188

3/

4

189

'/2

190

ql

191

Char.

¥

A

0

0

¢

-

ii

0

0

B

TM

e

U

e

..

f

Note: 1 The optimizer function allows the following:Ifa spacing code
received, the Carriage moves only the shortest distance, and the action

will

take place without unnecessary movement. This saves printing time. When

is

character data
automatically stores it until:

sent to the Printer within a one-secondinterval, the Printer

(1) Function codes are sent,

(2)

the interval

greater than one second. Printingisthen executed.

is

is

2 The following characters descend by one dot.

er,

1', §,

CD

87

Character

31

Block Graphic Code

Sets

Standard, CompressedorCondensed

Code Char. Code

Dec.

224
225
226
227
228
229

230
231
232
233
234
235
236
237
238
239

Hex.

EO
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
EB

EC
ED
EE
EF

Oct.

340
341
342
343
344
345
346
347
350

351
352
353
354
355
356
357

(Blank)

•

•

•

•

..

~

-

-

I

I

r

•

..

..

Dec.

240
241
242
243
244
245
246
247
248
249
250
251
252
253
254

Hex.

FO
F1
F2
F3
F4
F5

F6
F7
F8
F9
FA
FB
FC
FD
FE

Oct.

360
361
362
363
364
365
366
367

370
371
372
373
374
375
376

•

Char.

I

-

I

II

f-

I

L

-.J

-.JL

-1

+

,..

..lIIIII

~

...

Set

Note: These characters are composedofsix vertical dots. When using these
codes to prepare diagrams, Line Feed should be set to Half Forward Line

If

Feed.

another paper feed pitchisused, the diagram will not be accurate.

88

Appendix C

IBM Character Sets

Character Set 1

When in Tandy mode and an IBM character setisselected, only set 2isap-

plicable and character set 1 may not be printed.

89

Character

Sets

90

Appendix

Character Set 2

When in Tandy mode and an IBM character setisselected, only set 2isap­plicable.

C

91

Character

Sets

92

Programming Information D

The following items should be considered when you program the Computer.

1.

When Printer Poweristurned on:

of

• Optional functions are selected according to the setting
Function Selection Switches.

•

If

CP

Modeisselected, Full Forward Line Feedisset.

+LF)

is

• NL (CR

• Underline

• Standard character

• Buffer memory

2. Every character font can be intermixed with another style
in the same line. However, the Printer will insert dot spaces
that the new dot position
cause unexpected automatic wrap-around. To prevent this, intermix
characters only
line.

3.

Elongated (Double-width) characters and Underline are
at

the endofthe line and such printing continues until a terminating

command

4. You should avoid wrap-around. Wrap-around will disturb the dotcount
of

the text in a line.

5.

In the Repeat
many times as provided for in the count number.Ifany function code
is

received for repetition, it will be consideredaninvalid code (X).

is

is

received.

selected.

not

set.

is

set (not Elongated and not Bold).

is

completely cleared.

is

valid for the currentcharacter size. This may

on

short lines, or

Data

commands, printable characters can be repeated

don't

mix character sizesonthe same

not

the

of

character

to

insure

terminated

as

6.

POS commands can be usedatany carriage position.Ifa designated
dot column address
overprint will occur.

7.

Under Block Graphic printing,
for printing diagrams.

8. Line Feed in Graphics Mode
CP

Mode. An odd vertical spacingisgenerated in Graphics Mode. Con-

sider the following relationship between Line Feed pitches.

11

timesofFull Line Feed =18timesofGraphics Line Feed

11

timesofHalf

is

in the current text whichisalready printed out,

Half

Forward Line Feed should be used

is

different from Line Feed pitches in the

Line Feed =9 timesofGraphics Line Feed

93

Programming

9.

Graphic printing can be intermixed with character printing in the same

line. Dot density inGraphics Mode

er character style.

10.

Bold character modeisuseful for headings or titles.

Information

is

the same as the densityofthe form-

Programming

Note to ModelIIProgrammers:

If

the Printer goes off-line during a print operation, and remains off-line
for a certain period
sage. Application programs should be written to trap such errors, inform

of

the operator
rect the condition and continue printing.
gram, an
continue.

The BASIC statements LPRINT and LLIST outputto the Line Printer. See
your Computer's reference manual for syntax details.
Computer, read LPRINT as

Examples:

LLIST
LPRINT

LPRINT
REST"

LPRINT "SMALL";CHR$(27);CHR$(l4);"LARGE";CHR$(27);
CHR$(l5);

LPRINT
CHR$(23); "COMPRESSED";CHR$(27);CHR$(19); "STANDARD"

LPRINT
CHR$(l38);"TWO

the error condition, and give the operator a chance to cor-

I/O

error will occur and the operator may type

Lists the resident program to the Printer.

"THISISA TEST."

Prints the message in quotes and tells the Printer that the next

printable character brings a new line.

"THISISPART OF A

Prints both messages onthe same line (because
The next printable character received starts a new line.

Prints both normal and elongated charactersonthe same line.

Prints condensed, compressed, and standard characters in the
same line.

"START"

Prints these letters at

Examples

of

time, ModelIITRSDOS will present an error mes-

If

itisa BASIC applications pro-

CON

If

you have a Color

PRINT

"SMALL

CHR$(27);CHR$(20);'

AGAIN"

;CHR$(27);CHR$(56);CHR$(l38);

LINE"

# -2,.

3/4

LINE";:

'CONDENSED"

line pitch.

LPRINT

"THISISTHE

of

the semicolon).

"ONE

T I

ENTER

Ito

;CHR$(27);

LINE";

94