Radio Shack Hardware Manual DWP 510 Operation 1984 Tandy Text

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DWPCatalog Number 26-1270

TERMS AND CONDITIONS OF SALE AND LICENSE OF RADIO SHACK COMPUTER EQUIPMENT AND SOFTWARE
PURCHASED FROM A RADIO SHACK COMPANY-OWNED COMPUTER CENTER. RETAIL STORE OR FROM A
RADIO SHACK FRANCHISEE OR DEALER AT ITS AUTHORIZED LOCATION

LIMITED

WARRANTY

CUSTOMER OBLIGATIONS

Equipment"), and any copies of Radio
lull responsibility that this Radio Shack computer hardware purchased (the
capabilities,
Shack software included with the Equipment or licensed separately (the "Software") meets the specifications, capacity,
versatility, and other requirements of CUSTOMER.
CUSTOMER assumes full responsibility for the condition and effectiveness of the operating environment in which the Equipment and Software

CUSTOMER assumes

are to function, and for

II.

installation.

its

RADIO SHACK LIMITED WARRANTIES AND CONDITIONS OF SALE
upon purchase of the Equipment. RADIO
For a period of ninety (90) calendar days from the date of the Radio Shack sales document received
SHACK warrants to the onqinal CUSTOMER that the Equipment and the medium upon which the Software is stored is free from manufacturing

FROM
THIS WARRANTY IS ONLY APPLICABLE TO PURCHASES OF RADIO SHACK EQUIPMENT BY THE ORIGINAL CUSTOMER
AT ITS
RADIO SHACK COMPANY-OWNED COMPUTER CENTERS. RETAIL STORES AND FROM RADIO SHACK FRANCHISEES AND DEALERS
been
AUTHORIZED LOCATION The warranty is void if the Equipment's case or cabinet has been opened, or if the Equipment or Software has
defects

warranty period, the defective Equipment
If a manufacturing defect is discovered during the stated
Shack Computer Center, a Radio Shack retail store, participating Radio Shack franchisee or Radio Shack dealer
in the event of
along with a copy of the sales document or lease agreement. The original CUSTOMER'S sole and exclusive remedy
election and sole
correction of the defect by repair, replacement, or refund of the purchase price, at RADIO SHACK'S

subiected to improper or abnormal use.
to a Radio

must be returned
for repair

a defect is limited to the

expense. RADIO

III.

SHACK

to replace or repair expendable items.
provided in this
to the design, capability, capacity, or suitability for use of the Software, except as
of a
an "AS IS" basis, without warranty. The original CUSTOMER'S exclusive remedy, in the event

has no obligation

RADIO SHACK makes no warranty as

paragraph Software is licensed on
Radio Shack sales document
Software manufacturing defect, is its repair or replacement within thirty (30) calendar days of the date of the
Computer Center, a Radio Shack retail store,
received upon license of the Software. The defective Software shall be returned to a Radio Shack
participating Radio Shack franchisee or Radio Shack dealer along with the sales document.
any warranties of any nature on behalt
Except as provided herein no employee, agent, franchisee, dealer or other person is authorized to give

Except as provided herein. RADIO

PARTICULAR PURPOSE.
Some states do not allow

SHACK MAKES NO WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A

limitations

on how long an implied warranty

lasts,

so the above limitation(s)

may

not apply to

nllCTnMCD
LUblUMtK.

LIMITATION OF LIABILITY

ANY OTHER PERSON
EXCEPT AS PROVIDED HEREIN, RADIO SHACK SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR
INDIRECTLY BY'
OR ENTITY WITH RESPECT TO ANY LIABILITY. LOSS OR DAMAGE CAUSED OR ALLEGED TO BE CAUSED DIRECTLY OR
TO. ANY
"EQUIPMENT" OR "SOFTWARE" SOLD LEASED. LICENSED OR FURNISHED BY RADIO SHACK, INCLUDING, BUT NOT LIMITED
RESULTING FROM THE
INTERRUPTION OF SERVICE LOSS OF BUSINESS OR ANTICIPATORY PROFITS OR CONSEQUENTIAL DAMAGES
OF PROFITS. OR
USE OR OPERATION OF THE '"EQUIPMENT" OR "SOFTWARE" IN NO EVENT SHALL RADIO SHACK BE LIABLE FOR LOSS
MANNER
ANY INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY BREACH OF THIS WARRANTY OR IN ANY
"EQUIPMENT" OR "SOFTWARE
ARISING OUT OF OR CONNECTED WITH THE SALE. LEASE, LICENSE. USE OR ANTICIPATED USE OF THE

A
&.-#;.

BY
NOTWITHSTANDING THE ABOVE LIMITATIONS AND WARRANTIES. RADIO SHACK'S LIABILITY HEREUNDER FOR DAMAGES INCURRED
OR "SOFTWARE"
CUSTOMER OR OTHERS SHALL NOT EXCEED THE AMOUNT PAID BY CUSTOMER FOR THE PARTICULAR "EQUIPMENT"

...''':.<

%J5S»

INVOLVED
„
r
„
Software.
RADIO SHACK shall not be liable for any damages caused by delay in delivering or furnishing Equipment and/or
more than two (2) years
brought
may
be
this
Warranty
under
No action arising out of any claimed breach of this Warranty or transactions
of the Radio Shack sales document for the Equipment or
after the cause of action has accrued or more than four (4) years after the date
_.

Software, whichever
D.

Some

not apply to

IV.

first

occurs.

states do not allow the limitation or exclusion of incidental or consequential

damages, so the above

,...,,
limitation(s)

or exclusion(s)

„„
may

CUSTOMER.

RADIO SHACK SOFTWARE LICENSE
RADIO SHACK grants

medium

Title to the

CUSTOMER may

CUSTOMER

RADIO SHACK Software on one computer,

subiect to the following

this

terminals
use Software on one host computer and access that Software through one or more

,.,,

title

the Software permits this

shall not use,

in this

CUSTOMER.
G.

All

APPLICABILITY OF

IW^Wi

all

copies of the Software.

WARRANTY

The terms and conditions
Software License to

and as is specifically
make, manufacture, or reproduce copies of Software except for use on one computer
Software License. Customer is expressly prohibited from disassembling the Software.
copies are required in
CUSTOMER is permitted to make additional copies of the Software only for backup or archival purposes or if additional
allows a backup copy to be made. However, tor
the operation of one computer with the Software, but only to the extent the Software
own use
TRSDOS Software, CUSTOMER is permitted to make a limited number of additional copies for CUSTOMER S
of the Software tor each
CUSTOMER may resell or distribute unmodified copies of the Software provided CUSTOMER has purchased one copy
third parties receiving copies of the Software from
one sold or distributed. The provisions of this Software License shall also be applicable to
provided

a non-exclusive, paid-up license to use the

Software License, applicable copyright laws shall apply to the Software.
„,,„„,,„.„
CUSTOMER, but4 not,
on which the Software is recorded (cassette and/or diskette) or stored (ROM) is transferred to

Except as otherwise provided

CUSTOMER

of this

CUSTOMER

the Equipment and/or
Warranty are applicable as between RADIO SHACK and CUSTOMER to either a sale of
to a third party for lease to
or to a transaction whereby RADIO SHACK sells or conveys such Equipment

benefit of RADIO SHACK, the author, owner and/or licensor of the
limitations of liability and Warranty provisions herein shall inure to the
Software and any manufacturer of the Equipment sold by-RADIO SHACK.

The

ftHRNHB

m&u®i

w£*353

The FCC Wants You

Know

This equipment generates and uses radio frequency energy. If not installed and used properly, that is, in strict accordance with the manufacturer's instructions, it may cause interfer-

ence

to radio

and

television reception.

has been type tested and found to comply with the limits for a Class B computing
device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are
designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular
It

installation.
If this equipment does cause interference to radio or television
reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:

•

Reorient the receiving antenna

•

Relocate the computer with respect to the receiver

•

Move

the computer

away from

the receiver

Plug the computer into a different outlet so that computer and receiver are on different
branch circuits.

•

necessary, you should consult the dealer or an experienced radio/television technician for
You may find the following booklet prepared by the Federal Com-

additional suggestions.

munications Commission helpful: How to Identify and Resolve Radio-TV Interference
Problems.
This booklet is available from the US Government Printing Office, Washington DC
20402, Stock No. 004-000-00345-4.

Warning
This equipment has

been

comply with the limits for a Class B computing device,
FCC Rules. Only peripherals (computer input/output
certified to comply with the Class B limits may be attached

certified to

pursuant to Subpart J of Part 15 of
devices, terminals, printers, etc.)
to this

radio

computer. Operation with non-certified peripherals

is likely

to result in interference to

and TV reception.

DWP-510 Operation Manual:
Copyright© 1984 Tandy Corporation,
Fort Worth, Texas 76102, U.S.A.
All rights reserved.

Reproduction or

without express written permission from
its licensor, of any portion of this
manual is prohibited. While reasonable efforts have been taken in the preparation of this manual to assure its accuracy,
Tandy Corporation assumes no liability resulting from any
errors or omissions in this manual, or from the use of the information contained herein.
use,

Tandy Corporation and/or

Contents
Introduction

1/Description of the

DWP-510

Front View
Inside

View

Rear View

2/Setting

Up the DWP-510

Wheel Installation/Removal

Ribbon Cartridge Installation/Removal

Paper Loading

DWP-510 to
Connecting the DWP-510 to

Connecting the

3/Using the

Power Source

TRS-80

DWP-510

Setting the Pitch Switch
Setting the

New Line

Switch

DWP-510
Program Mode

13
13

Control Codes and the

External

Special Functions

4/Care and Maintenance
Troubleshooting

5 /Specifications

Appendix
Appendix
Appendix
Appendix

A/ ASCII Chracter Codes

B/ Interface Description
C/ Print Samples
D/ Schematic Diagrams

27
29

Introduction
Congratulations for selecting the
printers available for

With

a simple change of print wheels, the

Other special features of the

We think it's one of the best medium-cost, high-quality
should provide you with years of reliable service.

TRS-80 DWP-510.

microcomputers and

DWP-510

DWP-5 10

styles.

include:

® Selectable print pitch (characters per inch).

maximum

can provide print-outs in a variety of font

The

pitch can be specified via the

DWP-510

front panel switches

program control.
• Tractor Feed (optional/extra) paper handling for fanfold paper, or Friction Feed (standard) paper handling
or, for

flexibility, via

single-sheet or fanfold paper.

A Self-Test feature that lets you see if the Printer is operating properly before you
An

begin printing.

Out-of-Ribbon Sensor that automatically stops printing when the ribbon runs out.
• Special Line Feeds (1/48", Reverse, etc.) for special printing applications.

•

and much more!
This manual

will:

® Describe the
®
•

DWP-5 10

to you.

Show you how to set it up.
Describe how to use the Printer in

a variety of printing applications.

for

- 2 -

1/ Description of the
When you unpack the DWP-5 10, be
® DWP-510
•

®
•

DWP-510

sure the package contains a:

Power Cord
Print Wheel
Ribbon Cartridge

Be sure to unpack the cushions found on the inside of the Printer. You'll have
hands and gently lift it up to gain access to the inside of the Printer.
It's

important to become familiar with the Printer before you begin using

before setting

up and using the

DWP-5 10.

it.

to grasp the front cover with both

Study the following section carefully

Figure

Paper Advance Knob. Turn

knob

DWP-510 (Front View)

manually advance the paper.

PITCH Switch. To print at 10 characters per inch, set this switch to 10; to print at 12 characters per inch, set
the switch to 12; to print Proportionally Spaced text, set it to PS.
ON-LINE/OFF-LINE

Switch.

problems during printing,

this

POWER Indicator.

The

set this

Lights

when

Printer

switch to
the

power

must be

set to

OFF-LINE and
is

ON-LINE

before printing can begin. If you have

printing will immediately stop.

on.

Platen Pressure Lever. For friction feeding, this lever must be set toward the rear of the Printer. When using
the optional/extra Tractor Feed unit, disengage platen pressure by setting the lever to the front position.

Copy Control Lever. This

lever must be set to correspond with the number of copies you're printing. Pull
forward for single-copy printing. Set toward the rear if you're using multi-copy paper.
Caution: Damage to the print wheel could occur if the Copy Control Lever is not adjusted correctly.

- 4 -

Front Cover. Always use both hands

when

DWP-510 (Inside

lifting this cover.

View)

Note that the cover must be closed before

print-

ing will occur.

Platen.

(D Paper

Bail.

For the best printing

Carriage. This

results, the bail

mechanism holds

tridge before tilting the carriage

should always be against the paper.

the ribbon cartridge and the print wheel.

back

handles closest to the paper and pull up and towards you.

when

the

power

ON.

5 -

Always remove the ribbon

car-

To tilt the carriage back, grasp the two green
Do not move the carriage back and forth manually

to get to the print wheel.

inia

esiJ

^':.,-

Figure 3.

Self-Test Switch.
all

When

DWP-510 (Rear View)

running the Self-Test, this switch must be

(D Interface Connector. Connect the cable from your TRS-80
(D Power

ON/OFF Switch.

direction to turn the

set to

ON. Be

sure that

it is

set to

OFF for

other applications.

Set this switch to

to this connector.

ON to turn the Printer power on; push

the switch in the opposite

power OFF.

Power Cord Connector. Connect one end of the supplied power cord

to this connector.

plied cord; connect the cord to a grounded wall outlet or to an approved

power

- 6

strip.

Use only the sup-

2/ Setting
When

setting

Up the

up the DWP-510, always be sure you pick a

level, sturdy location

with plenty of

room

for easy

paper flow.

Wheel Installation/Removal

The DWP-510 package includes a Courier 10 print wheel which you will need to install before
Shack carries a number of different print wheels for printing different font styles. These include:

printing.

Radio

Courier (10 pitch) (26-1430)
Prestige Elite ( 1 2 pitch) (26-1431)
• Madeleine (Proportional Space) (26-1432)
•
•

Cubic (Proportional Space) (26-1433)
• Tile Italic (12 pitch) (26-1434)
®

OCR-B

•

Letter Gothic (12 pitch) (26-1436)

(26-1435)

Cubic 15 (26-1438)
• Bold Proportional Space (26-1439)
• Scientific A/N (26-1486)
•

•
•

Pica (10 pitch) (26-1290)
Narrator (26- 1291)

OCR-A (26-1292)
• Elite (12 pitch) (26-1293)
•

don't fit your immediate printing needs, be sure to check with your local Radio Shack
Center
or
store
since we are continually making more font styles available.
puter
If these font styles

7 -

Com-

Install the Print

Remove

Wheel:

the ribbon cartridge from the carriage by gently lifting the ribbon cartridge straight up.

Grasp the two green handles (which are

closest to the platen)

between your thumb and forefinger and gently

tilt

the carriage toward you.

Hold the

When

print wheel by the green hub.

the print wheel

properly installed, the hub will be toward the

paper.

Position the red dot (on the back of the print wheel, opposite the hub) so that
open notch on the carriage. (Match the red on both the hub and the notch.)

Push down on the hub

until the

corresponds to and

wheel clicks into place. The green hub should be

all

the

fits

into the

way down.

Grasp the two green handles (which are closest to the platen) between your thumb and forefinger and gently
away from you; firmly press the carriage down into its original position.

tilt

the carriage

Replace or

reinstall the

To Remove the
1.

Remove

2. Tilt

ribbon cartridge.

Print Wheel:

the ribbon cartridge.

the carriage back as described above.

Grasp the green hub of the print wheel and pull up. For
while pulling

easier removal, gently twist the wheel

back and forth

up.

Ribbon Cartridge Installation/Removal
carries two ribbon cartridges for the DWP-510— a high-quality carbon ribbon (26-1419) and a long
nylon ribbon (26-1449). No matter which ribbon you choose, you'll find that they're both easy to install and
remove.

Radio Shack
life

Note:

When

the carbon ribbon (26-1419) runs out, the printer detects the end of the ribbon

The nylon ribbon (26-1449)

To
1

an endless loop, so

this will

and stops

printing.

not happen.

Ribbon Cartridge:

Install a

Before installing the cartridge, remove

all

slack in the ribbon by turning the green

knob on the cartridge

in the

direction indicated by the arrow (clockwise).

Position the cartridge so that the ribbon slides into position between the print wheel and the plastic card guide;
the tabs on the cartridge should line up with the green claws on the carriage.

Press

Turn the ribbon

down on

To Remove
1

the cartridge and snap
feed

knob

into place.

1/4 to 1/2 turn clockwise until the cartridge locks

a Ribbon Cartridge:

Gently press the green carriage claws away from the cartridge

2. Lift

up on the

down.

cartridge.

Be careful not

to catch the ribbon

tabs.

on the print wheel.

Paper Loading
You
If

can use either fanfold computer paper or single-sheet typewriter paper with the DWP-510.

you're using fanfold paper, you'll find

tor

most

efficient to use the optional/extra

DWP-510

Bidirectional Trac-

Feed unit (26-1447).

Friction Feed Paper Loading
1

Gently pull the paper

bail

away from

the platen.

Set the platen pressure lever toward the rear side of the Printer (pressure

ON).

the paper behind the platen and turn the platen manually(turn the paper advance knob) so that the paper
advances past the card guide.

3. Insert

4. Set

move

freely

and move the platen pressure lever back toward the rear side of the Printer

(pres-

the platen pressure lever toward the front of the Printer (pressure

back and

OFF)

so that the paper can

forth.

Align and position the paper at the

Hold the paper
sure ON).

in position

The paper will no

longer

Lower

Position the paper manually to the

the paper bail so that

Note: Be sure the

left

it is

margin.

move

freely.

against the paper.

first line

Copy Control Lever

set to

of printing by turning the paper advance knob.

unless you're using multiple form paper. If the Printer runs out of

paper, no out of paper signal will be sent to the computer; the Printer will continue printing on the platen.
If this

happens, immediately turn the

per, return this switch to

ON-LINE/OFF-LINE

ON-LINE.

- 9 -

switch to

OFF-LINE;

after

loading more pa-

Connecting the

DWP-510

to a

Power Source

Always be sure the DWP-510 is connected to a grounded wall outlet or grounded approved power strip, such
Radio Shack's Plug-In Power Strip (6 1 -26 1 9) or the Automatic Power Controller, Model SW-30 1 (26- 1 429).
Always use the supplied cord when connecting the

DWP-5

to a

power source.

Plug the female end of the cord into the connector on the rear side of the Printer.

Connect the other end of the cord into an approved power source.

Connecting the

DWP-510

to a

XMS-80

The DWP-510 can be used with any TRS-80 Computer

or Data Terminal that has parallel interface capabilities.

This includes the:

Model I
Model II
• Model III
• Model 4
• Model 12
• Model 16
• Model 100
• Model 2000
• DT-1 Data Terminal
•
•

However, before connecting the Printer

to the

TRS-80, be sure you have the correct

cable.

Table

the appropriate Radio Shack cables; Table 2 briefly describes the location points on the TRS-80s.

summarizes

Table

Printer-to-Computer Cables

Cable Catalog Number

TRS-80

Model

26-1401

I/III/4

Model 1I/12/16/2000/DT-I

26-4401

Model 100

26-1409

Table

TRS-80 Connection Locations

TRS-80

Location

Model

Left side of E.I.

Model

Rear Panel

1/12/ 16/ 100/2000

Lower Panel

Model III/4/DT-

Connect one end of the appropriate cable

Connect the other end of the cable

to the interface

your TRS-80.

- 11

connector on theDWP-510.

- 12 -

DWP-5 10

3/ Using the

DWP-5 10, you should perform the Self-Test to ensure that the Printer is operating properly.
Before running the Self-Test, however, you should load wide paper (15") into the Printer because Self-Test performs printing across the full length of the platen. To run the Self-Test;
Before using the

Set the Printer

TEST

Set the

To end

ON/OFF switch to ON.

ON-LINE/OFF-LINE

the

2. Set

power

OFF-LINE.

switch to

ON.

switch to

the Self-Test, set the

TEST

switch to

OFF.

Setting the Pitch Switch
Be sure
using.

to set the
If

PITCH

switch (on the front panel) to the position that corresponds with the print wheel you are
print wheel, for example, set the Switch to 10; if you're using a Madeleine

you are using a Courier 10

Proportional Space wheel,

not accidentally

bump

set the

the

switch to PS.

PITCH

switch during printing. Unless you change the pitch via software, the curyou change the pitch via software, you must turn the Printer power

rent switch setting remains in effect. (Once

OFF to use the front panel

switch.)

New Line

Setting the

Switch

Inside the front panel (right side of the frame)

turn only

when

the Printer receives code

Normally, you'll leave this switch
Printer with an IBM PC), set it to

You

can also

select

All information

consider

code

(see next section

For some applications

power

OFF to

when you

are using the

However, once you change

use this switch.

DWP-5 10

how

sent to the Printer as

the Printer

(like

only via software (27 21/27 22 code sequence).

Control Codes and the
DWP-5 10,

the Carriage Return

CR+LF position.
CR ONLY

you must turn

Before using the

a switch to select Carriage Return with Line Feed or Carriage Re-

in the

CR + LF or CR

this function via software,

the

TRS-80 communicates with

numbers between

the Printer.

and 255 decimal (00-FF

for

you hexadecimal

fans).

The printer interprets these numbers according to the American Standard Code for Information Interchange,
commonly referred to as the ASCII code. (See Appendix A for a list of ASCII codes.) Most numbers (or codes)
are printed as letters, numbers, or symbols. However, the numbers 0-31, as well as some special sequences of
code numbers, are used to control various functions of the Printer. These Control Codes allow you to control line
feeds, backspacing, underlining, etc.

13 -

Sending Control Codes from

BASIC

Some

Printer functions are activated by a single code, but many require a sequence of two or more codes. Most
multiple-code sequences begin with decimal 27 (referred to as the ESCape code). The ESC code notifies the
Printer that a special sequence is on its way. The next code(s) sent determines which Printer function is selected.
In

BASIC, use

CHR$

(

For instance, set up the
lowing short program:
10

)

to send these codes to the Printer.

DWP-510

as described earlier

and enter BASIC

in the

normal way. Then type the

fol-

LPRINT CHR$(15); "UNDERLINE" CHR$(14); "NO UNDERLINE"

and

RUN

it.

The word UNDERLINE was underlined and the words NO
were not underlined. Why? The codes CHR$(15) and CHR$(14) are the guilty parties. Take a
Table 3. This chart shows the various code sequences understood by the DWP-5 10.

Roll the paper forward and look at the results.

UNDERLINE
quick look at

- 14 -

DWP-5 10 Control Codes

Table 3.

Code (Decimal)
08

Function

Backspace n/ 1 20"

< n <

255)

Line Feed*

Carriage Return with Line Feed**

End Underline

Start

27 01

1/120" Space

27 02

2/120" Space

27 03

3/120" Space

27 04

4/120" Space

27 05

5/120" Space

27 06

6/120" Space

27 07

7/120" Space

27 08

8/120" Space

27 09

9/120" Space

27 10

Reverse Line Feed*

27 14

12 Pitch Select

27 15

10 Pitch Select

27 17

Proportional Space Select

27 21

Start Carriage

27 22

End Carriage Return Only**

27 24

Enters External Program

27 25

Exits External

27 26

1/48" Line Feed

27 28

Half Line Feed

27 30

Reverse Half Line Feed

27 31

Bold Print

27 32

Bold Print Off

27 56

1/8" Line Feed

Underline

Return Only**

Mode***

Program Mode***

Line Feeds may be sent from machine-language programs, but not from BASIC'S LPRINT statement. See
the Technical Information section of your TRS-80 owner's manual for details on sending Line Feeds.

** Normally,
sent, a

causes a Carriage Return plus a Line Feed. However, after a CHR$(27); CHR$(21)
causes a Carriage Return only; CHR$(27); CHR$(22) causes a return to normal.

CHR$(13)

*** See External

Program Mode

later in this

manual.

Note: There are three more control codes that function only when you are using theOptional Auto Sheet Feeder. Refer to the Auto Sheet Feeder owner's manual for the specific codes.

- 15 -

Examples of Code Program Lines
LPRINT CHR$(8); CHR$(1)
Backspaces 1/120".

LPRINT CHR$(13)
Returns carriage with Line Feed.

LPRINT CHR$(27); CHR$(3)
Moves 3/120"

space.

LPRINT CHR$(27); CHR$(14)
All subsequent characters will be printed in 12 pitch.

LPRINT CHR$(27); CHR$(17)
All subsequent characters will be printed in Proportional Spacing.

External Program
On some

Mode

special print wheels, such as the

OCR-B

10 and others, you'll need to externally control the:

Spacing between Proportional Spaced characters
of ribbon feed.
• Printing impression level.
•
•

Amount

The

print wheels that require external programming will be labeled Require Special Programming on the
packaging material. Each print wheel package will contain external programming code information.

enter the External Program

Mode, send a CHR$(27); CHR$(24). Then send

a two-byte code for each

character or symbol.
•
•

The first byte is the ASCII code for the character.
The second byte contains the data specifying the
and

printing format

(i.e.,

printing impression level, ribbon feed,

pitch).

Important Note! This must be done for each character during the External Program

Mode

or an error will occur.

Table 4 describes printing impression levels, Table 5 shows Ribbon Feed, and Table 6 details spacing between
Proportional Spaced characters. Note that these tables list binary values. You'll need to combine the binary
values and then convert the binary values (using the Base Conversion Chart in your TRS-80 owner's or reference
manual) to a decimal value, then send that decimal value to the Printer with CHR$( ).

For example,

OCR-B,

the letter

T requires

1/10" spacing, normal ribbon feed and printing impression level

at Table 6, you'll see the 1/10" spacing is binary 0110. Table 5 shows you that normal ribbon feed is
and Table 4 shows that printing impression level 4 is binary 100. Adding these values together produces
a binary value of 01 101 100 (01 10 + 1 + 100 = 01 101 100). By referring to your Base Conversion Chart in a
TRS-80 owner's or reference manual, you'll see that binary 01 101 100 is equal to decimal 108. Therefore, if you
send a CHR$(84); CHR$(108) to the DWP-510, the letter T will be printed.

Looking

binary

- 16 -

Unit amount (A/60")

unit set (Available

PS mode only)

set

Hammer

set

Hammer impression

level

(print without

Carriage

movement)
1

(no

hammer

action)

Table 4

Ribbon Feed
1

amount
Normal

Long

Table 5
1

Table 6

Example

LPRINT CHR$(27); CHR$(24) 'ENTERS EXTERNAL PROGRAM
20 LPRINT CHR$(84); CHR$(108); 'PRINT T
30 LPRINT CHR$(97); CHR$(107); 'PRINT a
40 LPRINT CHR$(110); CHR$(107); 'PRINT n
50 LPRINT CHR$(100); CHR$(108); 'PRINT d
60 LPRINT CHR$(121); CHR$(107); 'PRINT y
10

17 -

D4
1

Special Functions
When

using the

Auto
In

DWP-5 10,

you should be aware that there are special functions

available.

NL (New Line)

some

cases, the

DWP-5 10

will automatically execute a

New

Line function (Carriage Return and Line Feed).

These cases include:
•

•
•

When
When
When

DWP-5 10
DWP-510
the DWP-5 10

and the carriage is in the 136th column position.
and the carriage is in the 163rd column position.
Proportional Spacing and the carriage moves to within 8 units (8/60") of the

the

set to 10 pitch

the

set to 12 pitch

set to

right

margin.

REMEMBER!

The New Line switch can be

set to select either

CR+NL. (when you
ONLY.) Refer to Setting the New Line Switch.

turn only. Usually

it is

set to

are using the

Carriage Return with Line Feed or Carriage Rewith an IBM PC, set this switch to CR

DWP-510

Optimizer
For more

efficient printing, the

DWP-510

stores certain codes

when they

are received within 10 milliseconds of

each other. These codes include:
•
®
•
•
•
•

Space
Backspace
Line Feed (including New Line)
Reverse Line Feed
Half Line Feed
Half Reverse Line Feed

until either the character codes or function codes are sent within intervals of 10 msec or
more. When either of these situations occurs, the stored codes are executed one at a time. For example, when 10
Line Feed codes. are entered with less than 10 msec intervals, the DWP-510 will automatically feed 10 lines at

These codes are stored

once.

- 18 -

4/ Care and Maintenance
parts marked with green require any normal handling/adjustment.
performed only by a qualified service technician.

Only the

other maintenance should be

—

Of course, you can and should perform
writer.

Any

standard cleaning procedures
just as you would with any office typeClean the platen, print wheel and other parts with standard typewriter cleaning fluids (use a soft, lint-free

cloth).

Some

do's

and don'ts

to assure

maximum

performance and

reliability

from your

Printer:

DON'T

Plug power cord into 3-wire grounded outlet.
Position the Printer on a firm, clean,

Operate Printer in environments of high dust or
content, high temperature or humidity.

flat surface.

Place any objects on any part of the Printer

Use only a lint- free cloth to clean the Printer
Mild detergent solution can be used sparingly.
Ensure that

all

case.

falls

inside the Printer, turn Printer

carefully

Use

covers are closed and secured before

remove the

(if

power

anything
off

and

object).

alcohol, solvents or harsh cleaning agents on any

part of the Printer.

operating.

Turn

dirt

off power before

making any adjustment.

Operate Printer without paper (
15" wide take care not to print

paper

less

than

lines too long for the

paper).

Troubleshooting
If the Printer fails to

Power lamp does not turn on
A Check to see that the AC cord
:

No communication

A
B
3.

operate properly, try to solve the problem as follows:

Check
Check

with the

plugged securely into an appropriate power source.

TRS-80

to see if the interface cable
to see if the

properly connected.

ON-LINE/OFF-LINE

switch

ON-LINE.

Printer will not print

A
B

D
E

Ensure that the cover is securely closed.
Check and change the ribbon, if necessary.
Perform the Self-Test! operation to ensure that the Printer is internally capable of printing (see page 13).
Ensure that the print wheel is locked into position.
Check to see if anything has fallen into the mechanism that is physically obstructing the carriage movement.

- 19

- 20 -

5/ Specifications
Printing Speed

Line Feed Speed

43 characters per second
300 ms per 13.6 inches
4 inches per second

Printing Pitch

1/10 inch, 1/12 inch, Proportional spacing

Line Feed Pitch
Font

1/6 inch, 1/12 inch

Carriage Return Speed

124 character positions on Double Daisy Print Wheel
Courier 10 (Catalog Number 26-1430)
Prestige Elite (Catalog Number 26-1431)
Madeleine P.S. (Catalog Number 26-1432)
Cubic P.S. (Catalog Number 26-1433)
Tile Italic (Catalog Number 26-1434)
OCR-B (Catalog Number 26-1435)
Letter Gothic 12 (Catalog Number 26-1436)
Cubic 15 (Catalog Number 26-1438)
Bold P.S. (Catalog Number 26- 439)

Wheel

Characters per Line
Print

Wheel

A/N

Number 26-1486)
Pica 10 (Catalog Number 26-1290)
Narrator (Catalog Number 26-129 1)
OCR-A (Catalog Number 26-1292)
Elite 12 (Catalog Number 26-1293)
136 characters in 10 pitch mode
163 characters in 12 pitch mode
Scientific

(Catalog

40 million characters
Nominal 270,000 characters; may vary according
(Multistrike carbon ribbon)

Life

Ribbon Life

Nominal 1,600,000

to the text printed

characters (Fabric ribbon)

Interfaces

Data
Code
Temperature Ranges

8 parallel data

and

strobe

Modified ASCII

41 to 95°F(5 to 35°C)
to 149°F (-40 to 65°C)

Operating
Storage

-40

Relative Humidity

RH (No condensation)
RH (No condensation)

Operating
Storage
Paper Weight

20 - 90%

Size

Width:

- 95%

Total weight: 26 pound/ft 2 max. (127.9 grams/m2 max.)
One ply: 8 pound/ft 2 max. (40 grams/m2 max.)

Ribbon

Fabric ribbon (Catalog Number 26-1449)
8.05" x 24.6" x 15.55"
x 625
x 395
(HWD)
204.5
typical
120 VAC, 50/60 Hz, 135

Size

Power Requirements

Optional bidirectional tractor

mm
mm

max.)
16. 54 inches max. (420
min.)
Length: 3.33 inches min. (84.7
Multi-strike, carbon ribbon (Catalog Number 26-1419)

available (Catalog

Number 26-1447).

- 21 -

Table

on Print Wheel, impression Levels and Proportional Space Units

7. Fonts, Positions

Font

Wheel

Position on Print

Impression Level
Proportional

(

Unit

Z
02

Space

C
D

]

3/4

1/4

)

[

1/2

(a)

C
D

136

126

176

137

127

177

(Blank)

077

- 23 -

254

333

334

337

376

—
«

Proportional Character Set Units Per

UNITS

77/4D

88/58

87/57

89/59

65/41

79/4F

74/4A

118/76

90/5A

44/2C

45/2D

83/53

100/64

76/4C

Q
X

166/A6

126/7E

191/BF

72/48

47/2F

190/BE

98/62

70/46

125/7D

[

-91/5B

102/66

3/4

173/AD

187/BB

84/54

-116/74

169/A9

117/75

69/45

82/52

1/4

67/43

93/5D

-114/72

123/7B

-115/73

172/AC

189/BD

80/50

167/A7

62/3E

78/4E

71/47

174/AE

-252/FC

86/56

75/4B

94/5E

60/3C

68/44

220/DC

-41/29
-

92/5C

1/2

106/6A
*

58/3A

96/60

251/FB

66/42

219/DB

;

59/3B

223/DF

CODE
CHAR
WIDTH

72/48

73/49

74/4A

75/4B

76/4C

77/4D

78/4E

79/4F

80/50

81/51

CODE
CHAR
WIDTH

82/52

83/53

84/54

85/55

86/56

87/57

88/58

89/59

90/ 5 A

91/5B

[

CODE
CHAR
WIDTH

92/5C

93/5D

94/5E

95/5F

96/60

97/61

98/62

99/63

100/64

101/65

]

CODE
CHAR
WIDTH

102/66

103/67

104/68

105/69

107/6B

108/6C

109/6D

110/6E

111/6F

CODE
CHAR

112/70

113/71

114/72

115/73

116/74

117/75

119/77

120/78

121/79

106/6
J

8/76

CODE
CHAR
WIDTH

122/7A

123/7B

124/7C

125/7D

126/7E

127/7F

128/80

156/9C

163/A3

165/A5

Not used

CODE
CHAR
WIDTH

166/A6

167/A-7

168/A8

169/A9

170/AA

171/AB

172/AC

173/AD

174/AE

175/AF

1/4

3/4

1/2

CODE
CHAR
WIDTH

187/BB

188/BC

189/BD

190/BE

191/BF

220/DC

221/DD

CODE
CHAR
WIDTH

222/DE

223/DF

251/FB

WIDTH

i
i

192/CO

204/CC

219/DB

252/FC

253/FD

254/FE

a
5

Note: Codes are in Decimal and Hexadecimal (Dec/Hex).

- 25 -

- 26 -

Appendix B/ Interface Description
Interface Input Signal
Input Signal System Diagram

DATA
DATA
DATA
DATA
DATA
DATA
DATA
DATA

PRINTER

2
3
4

TRS--80
5

6
7
8

STROBE
>

Ground

not shown.

Description of Each Input Signal

(1)

DATA Lines (DATA - DATA 8)
These DATA lines provide 8 input signals for actuating the Printer.
1

The

Printer will ignore any invalid code

applied.

(2)

STROBE
A sampling signal
A

for the

DATA lines which provide instruction signals for actuating the

control signal generated by the computer which latches data into the Printer.

Output Signal
Output Signal System Diagram

BUSY

OUT OF PAPER
PRINTER

BUSY

ACK
FAULT

Ground not shown.

-27

TRS-80

Printer.

Description of Each Output Signal
•

BUSY
Busy condition:
Data is in buffer
1

2) Initial state
3) Off-line

mode

4) Error state
5)

Ribbon fault state
Cover open state

Ready condition:

•

Condition other than one of those

Cover closed

listed in

through 6 above

state

OUT OF PAPER
No

function. This line

always a "0" signal.

BUSY
This signal
•

the logical inverse of BUSY.

ACK
This signal indicates the Printer has accepted data from

•

CPU.

FAULT
This signal indicates the Printer

an error

state,

ribbon fault

state,

cover open state or off-line

Pin Assignments

terface Signal

Pin
1

2
3

4
5

6
7
8

pin 18

pin 36

pin 19

Signal

Name

Signal

GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND

N.C

STROBE

DATA
DATA
DATA

DATA 4
DATA 5
DATA 6

DATA
DATA
ACK

24
25

Name

BUSY
OUT OF PAPER
BUSY

FAULT

GND

GND
GND
GND
GND

+ 5 VDC

12
13

14
15

34
35

N.C
N.C
N.C

Note: N.C. pins are actually pulled up to +5 VDC through a 4.7K resistor.
Pin 18 provides +5 VDC to the TRS-80 (less than 80
of current).

- 28 -

state.

Appendex C/ Print Samples

Cubic (Proportional Space)

Courier (10 pitch)

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdef ghi jklmnopqrstuvwxyz
0123456789"[| IM J'®]i"

ABCDEFGHIJKLMNOPQRSTUVWXYZ

feed'ata iit£n¥§$0AU

abcdef ghijklmnopqrstuvwxyz
H
0123456789"[t' i'®]i"
/eeoa^a ut£u.¥§$OAU

!%.(){}*+-=, ;:/\<>? f~13g&§

!%.(){}*+-=, ;:/\<>?jrSc&i

°#|©'~iT

Tile Italic (12 pitch)

Prestige Elite (12 pitch)

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdef ghi jklmn op qrst uvwxyz
0123456789"[i m i '®]i'
feeoata 0t£^Y§$0nU
!%.( ){}*+-=, ;:/\<>? 1[~(3c&@

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdef ghi jklmnopqrstuvwxyz
m
0123456789"[f i'®H"
/eeoaca UT£u¥§$0AU!%.(){}*+-=, ;:/\<>?JTBc&@

°#| ©' ~u'

OCR-B

Madeleine (Proportional Space)

ABCDEFGHI3KLMNOPQRSTUVWXYZ

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghi k Lmnopqrstuvwxyz
0123456789" '§¥i-n£
!"#$%&'()="
<:_ + *><>?-" \ac

•

],. /aijIJeeBRo'd
;
g/EauU£NuaA<*a
:

External Program

- 29 -

Mode (EPM)

required

Letter Gothic

2 pitch)

Scientific

A/N

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghi jklmnopqrstuvwxyz
0123456789 0123 " 56789

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghi jklmnopqrstuvwxyz
0123456789""[rr®]i"
feeoaia Utfn¥§$DAU
!%.(){}*+-=, ;:/\<>? Oc&(a

a8Y?

|~f-+»a:

/AZrhJrJ

EPM

Cubic 15

required

Pica (10 pitch)

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghi jklmnopqrstuvwxyz
Ul23456789"[2™£ '®]J»

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghi jklmnopqrstuvwxyz
0123456789"[£™io®]£»

/f§e6a0a

fee'atka ut£|i¥§$GH(j

t£|i¥§$a A'U

{%.(){}* + -=, ;:/\<>?_1l~Bg&a

Bold Proportional Space

Narrator

ABCDEFGHIJKLMNOPQRSTUVWXYZ

ABCDEFGHIJKLMNOPQRSTUVWXYZ
ABCDEFGHIJKLMNOPQRSTUVWXYZ

abcdefghijklmnopqrstuvwxyz
0123456789"[| m i'®B"

012345678r[i m *d®H"

fe&oMh ut£u¥§$OSU

ftE'Uh ut£u¥§$DAU

!S.

- 30 -

(){}*+—, ;:/\<>?

1f~6&@

OCR-A

Elite

abcdefghijklunoporstuvuxyz
abcdefghijklmnopqrstuvwxyz
QlSa^bTflT.E—.n-OiT"
.

.0'

!"/..()

ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789"[?™i6®]i"

f .£• ¥I=?'o"a'Ci.

{}* + -=

-ii

:/\<>f_

/ee'atfa ut£|i¥§$dHU
|

H&a

!*.

*#.«' A.-V0

EPM

(12 pitch)

°#

required

- 31 -

(){}•+-=, ;:/\<>?

|Oi-r,-

|w^r

=66666666
<<<<<<<<
t-l-i-l-S-HHI<<<<<<<<
QQOOQQDQ

fl
o

WW
z z z

- 34

8 16 th

Main Control Logic (Page 3

of 3)

On LINE

SPACE

PS
1

lid

SPACE

GND

GND
GND
COVER OPEN SW

LIFT HIGH

2
1

3
2
1

LF 0B

+5V

OPT1

SP 2

GND

SP 3

CHECK OFF

HOME
SP CLOCK
SEL&HAM1
SEL&HAM2
SEL&HAM3
SLE HOME
SLE CLOCK

TEST SW

GND

39
37
SP

35
33

REVERSE
SPTT

32
31

RESET
SEL DRIVE
SEL REVERSE

SEL PT

29
27

26
74

RIBBON END

17
15

_____

—
"

9
7
5
3
1

____

13
11

RF BA
RF 0B

RF DRIVE

GND
GND
GND
GND
GND
GND

~~~~
19

SERVO HOLD

*5V

+5V

HUNCH
SP

CHECK

SEL CHECK

BUSY

OUT OF PAPER

GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND

BUSY

GND
GND
GND
GND

FAULT

GND

RESTORE

STROBE
1

DATA

DATA 3
DATA 4
DATA 5
DATA 6
DATA?
DATA 8

O
z
n

- 35 -

9
11

15
17

ACK

GND
GND

DATA

5VDC

4
6
8
10
12
14

16
18

20
22
24

Power Board Logic (Page

1 of 6)

- 36 -

Power Board Logic (Page 2 of 6)

3 S

=11;

-II

EC -J

=dM
K

Power Board Logic (Page 3 of 6)
rn
$1

r—*~l»

As!

- 38 -

Power Board Logic (Page 4 of 6)

- 39 -

Power Board Logic (Page 5 of 6)

& & Q

40 -

Power Board Logic (Page 6 of 6)
__1

HAM
HAM 2

SELM2

SELM1

RF M4

RFM3
RFM1
RFM2
GND

6
5

LIFTMG

4
3

L SHIFT

H SHIFT

+15VH

LIFT

HOLD

SPLC

+5V

MG
MG

REVERSE

HOME

HAM DRIVE
SEL DRIVE
SEL REVERSE

SEL 8.
SEL

HAM 2
HAM 3

SERVO HOLD

LED

SP LED

SELB

LFM2

LFM1

LFM3
LFM4

_____

GND
+15VL

+15VL
~

SPFB3

SPFB2

SPB

SP LED

SPA

SPLED©

SPEC

—____

_____

-——__

SPEC

GND

SPEB

+15VL

SPEA

o o
o

oo
3

41 -

V_J

______

LED©

SEL
"

——_

GND

+15VL

SELFB3

SELFB2

-15V L

SEL LED

SELA

SELPT

o o
o o o

SP B

_____

SPA

-15VL

SP FT

+16VL

GND

-15VL

+15VL

GND

<
3

+5V

-15V L
RIB

END

lelh

SELB

SEL

SELA

SEL

LED©
LED©

""-""_____

Mic

Mib

wta

Mlb

Ml a

O
D

___R...R-K-A-

Space Sensor Board Logic
CN13

For Power Board Ass'v

q|\j-j 7

p or p ower Board Ass'v

CONNECTION

'^4^HT2>

SPLE

°e

EL-IKL3

- 43 -

Power Supply Logic (100 Volt
i

Series)

LS _§_2J2_f _5__ 2__5l
)

(

44 -

SERVICE POLICY
Radio Shack's nationwide network

and

of service facilities provides quick,

conve-

computer products, in most
instances. Warranty service will be performed in accordance with Radio
Shack's Limited Warranty. Non-warranty service will be provided at reasonable
parts and labor costs.
nient,

reliable repair services for

all

its

Because of the sensitivity of computer equipment, and the problems which can
result

from improper servicing, the following limitations also apply to the

services offered by Radio- Shack:
1

If any of the warranty seals on any Radio Shack computer products are
broken, Radio Shack reserves the right to refuse to service the equipment or

to void
2.

any remaining warranty on the equipment.

any Radio Shack computer equipment has been modified so

that

within manufacturer's specifications, including, but not limited

to,

not

the

in-

any non-Radio Shack parts, components, or replacement
boards, then Radio Shack reserves the right to refuse to service the equipment, void any remaining warranty, remove and replace any non-Radio
Shack part found in the equipment, and perform whatever modifications are
necessary to return the equipment to original factory manufacturer's specistallation of

fications.
3.

The cost for the labor and parts required to return the Radio Shack computer equipment to original manufacturer's specifications will be charged to
the customer in addition to the normal repair charge.

RADIO SHACK, A DIVISION OF TANDY CORPORATION
U.S.A.: FORT WORTH, TEXAS 76102
CANADA: BARRIE, ONTARIO L4M 4W5
TANDY CORPORATION
AUSTRALIA
91

KURRAJONG

MOUNT

AVENUE

DRUITT, N.S.W, 2770

BELGIUM

U. K.

PARC INOUSTRIEL DE NANINNE
5140 NANINNE

BILSTON ROAD WEDNESBURY

WEST MIDLANDS WS10 7JN

Printed in Japan

5A4

87469903

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