Commodore MPS-802 User manual

INF OR MATI ON TO USER
"WARNING : TH IS EQUIPMENT HAS BEEN CERTIFIED TO COMPLY WITH
THE LIMITS
FOR A CLASS B COMPUTING DEVICE, PURSUANT TO SUB·
PART J OF PART 15 OF FCC RULES. ONLY PERIPHERALS (COMPUTER
INPUT/OUTPUT DEVICES, TERMINALS, PRINTERS, ETC.) CERTIFIED TO
COMPLY WITH T
HE CLASS B LIMITS MAY BE ATTACHED TO TH IS
COMPUTER. OPERATION WITH NON·CERTIFIED PERIPHERALS
IS LI KELY
TO RESULT IN INTERFERENCE TO RADIO AND TV RECEPTION."
"THIS EQUIPMENT GENERATES AND USES RADIO FREQUENCY ENERGY
AND IF NOT
INSTALLED PROPER L Y, THAT IS, IN STRICT ACCORDANCE
WITH THE MANUFACTURER'S INSTRUCTI
ONS, MAY CAUSE INTER·
FERENCE TO RADIO AND TELEVISION RECEPTION. IT HAS
BtEN TYPE
TESTED AND FOUND
TO COMP LY WITH THE LIMITS FOR A CLASS B
COMPUTING DEVICE IN ACCORDANCE WITH THE SPECIFICATIONS IN
SUBPART J
OF PART 15 OF FCC RULES, WH I CH ARE DESIGNED TO
PROVI
DE REASONAB LE PRO T EC TI ON AGAINST SUCH INTERFERENCE
IN A
RES IDENTI AL I NSTALLAT I ON. HOWEVER, THERE IS NO GUAR·
ANTEE
THAT INTERFERENCE WI LL NOT OCCUR IN A PARTICULAR
I
NSTALLATION . IF TH IS EQUIPMENT DOES CAUSE INTERFERENCE TO
RADIO
OR TELEVISION REC E PT I ON, WHICH CAN BE DETERMINED BY
TURNING THE EQUIPMENT OFF AND ON, THE
USER IS ENCOURAGED TO
TRY TO CORRECT THE INTERFERENCE BY ONE OR MORE OF THE
FOLLOWING MEASURES:
• REORIENT THE RECEIVING
ANTENNA
• RELOCATE THE COMPUTER WITH RESPECT TO
THE RECEIVER
• MOVE THE COMPUTER AWAY FROM THE RECEIVER
• PLUG THE COMPUTER INTO A DIFFERENT OUTLET
SO THAT COMPUTER AND RECEIVER ARE ON DIFFERENT
BRANCH CIRCUITS
"IF NECESSARY, THE
USER SHOULD CONSULT THE DEALER OR AN
EXPERIENCED RADIOITELEVISION TECHNICIAN
FOR ADDITIONAL
SUGGESTIONS. THE USER MAY FIND THE FOLLOWING BOOKLET PRE·
PARED BY THE FEDERAL COMMUNICATIONS COMMISSI ON HELPFUL:
'
HOW TO IDENTIFY AND RESOLVE RADIO·TV INTERFERENCE
PROBLEMS.'
TH IS BOOKLET IS AVAI LABLE FROM THE U.$. GVERN·
MENT PRINTING OFFIC, WASHINGTON,
D.C. 2402, STOCK NO . 004·
000-00345-4."
PART
NO : 320970

COMMODORE
MPS-BD2
DDT MATRIX PRINTER
USER'S GUIDE
A Friendly Introductian ta Your MPS-B02 Dot Matrix Printer
~ commodore
COMPUTER

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© 1984 Commodore Electtonlcs; Ltd.

Table Of Contents
Page No.
5ectlon1:GENERALINFORMATION .......•.......••.................•. 1
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . .
.. 1
PrintingCharacteristics
..............•............................ 1
Interface
..............................•..•.........•............. 1
PaperFeed Mechanisms
..•........................•...••......... 2
InternalMicroprocessorSystem
.•...................•..........•... 2
Specifications
....................•............................... 2
UNPACKINGYOUR PRINTER
......•...•....•..•....................... 3
Section
2: PREPARING TO USEYOUR PRINTER. . . . . . . . . . . . . . . . . . . . . . . .. • •. 4
CONNECTINGTHE PRINTERTOYOUR
COMPUTER. . . . . . . . . . . . . . . . . . . . • . . . 6
INSTALLINGTHEPAPER
...•......••.....••........•.....•........••.• 6
PERFORMINGTHEPOWER·ON
TEST. . . . • . . . . . •• . • . . . . • . . . . . . . . . . . •. . . .. 6
PERFORMINGTHE PRINTHEADTEST
.....•............................. 7
Section3: USING YOUR PRINTER
....................................... 8
SPECIALPRINTER·ASSOCIATEDCOMMANDS............................ 9
TheOPEN Command
....................................•...•.... 9
TheCMDCommand
.....•......................................•. 9
ThePRINT#Command ...........................................•. 10
TheCLOSECommand
.•.......................................... 10
PRINTING IN THEDIRECT MODE
.............................•.......•• 11
PRINTING UNDEF4 PROGRAM CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
FORMATCONTROL .....................................•............ 15
Printing DataExactlyas Received:sa= 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 16
Printing DataAccording
toa PreviouslyDefined Format:sa= 1 ............ 16
Storing
the FormattingData: sa= 2 .........•........................ 17
The FormattingCharacters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 18
Numeric:
.....................................•............. 18
Alpha(String Data):
........................................... 19
Skip(Blank):
.................................................. 20
Literals in Format
Strings ......•................................... 20
Setting
the Numberof LinesPerPage:sa =3 .........................•. 21
Enabling the PrinterDiagnostic Messages: sa= 4 .....•..... ~ . . . . . . . . . .. 21
Defininga ProgrammableCharacter:sa= 5 .. . . . . . . . . . . . . . . . . . . . • . . • . .. 23
SettingSpacing Between Lines:sa= 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 25
SelectingUpper/Lowercase:sa= 7
................................... 25
Suppressing Diagnostic MessagePrinting:sa= 9 . . . . . . . . . . . . . . . . . . . . .
.. 26
Resetting the Printer:sa= 10
....................•.................. 26
SPECIALCHARACTER FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 26
EnhancedCharacters
............................................. 26
Paging
......................................................... 27
SpecifyingIndividual Upper·and Lowercase
Characters. . .. . . . •. . . . . . . . .. 27
Reversinga Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 27
TheCarriageReturn
........................................•..... 28
Quotation Marks
................................................. 28
APPENDIX
SIMPLESTRING
FORMATIING ..................................... 29
LEADING ZEROES FORCED
...............•....................... 31
SIGNEDNUMBERS ......•........ ~ ............................... 32
DECIMALFRACTION SPECIFICATION
............................... 33
FIXED
AND FLOATING$ FIELDS .................................... 34
MIXEDFORMATFIELDTYPES
...................................... 35
FORMATIING WITH LITERALS ..................................... 36

Section 1
GENERAL INFORMATION
The FRICTION/SPROCKET FEED MPS-802 Printer adds a great deal of versitilityand
convenience to the use of your Commodore Computer. While this manual contains all
the information you need
to check out, connect, and operate your printer, you should
also refer
to otherCommodore manuals to get the most out of yourcomputersystem.
DESCRIPTION
The MPS-802 printer is designed to operate through software control.lt prints upper-
and lower-case alphabetic characters,numeric characters,and all the graphic charac-
ters available on yourCommodore computer, and even acustom user-defined charact-
er. In addition, your printer has considerable formatting capability owing to its in-
ternal microprocessor system.
Printing Characteristics
Your printeremploys a dot matrix print head. The wire heavy-duty jeweled head has a
life expectancy
of 50 million characters. If a print head malfunction should occur, ob-
tain authorized technical assistance. Failure to do this may vO.id warranty.
Interface
Your printerisdesigned to connectdirectlyintoyourcomputerthrough theSerial Port
(6-pins). However, you can connect your printer
to as many as"4 VIC disk drives by
daisy-chaining. Daisy-chaining means connecting 1 peripheral
to your computer and
plugging additional peripherals into the Serial Port of the last item connected. For
more information about Serial Port specifications, please refer
to the Serial Bus Sec-
tion in your Programmer's Reference Guide.

Paper Feed Mechanism
The MPS-802 Printer has a FRICTIONISPROCKET ·feed mechanism that uses
sprocket holes
to hold the paper edges. This model Is especially useful for printing
business forms.
See Figure 1 ..
Normal paper without sprocket holes can be used, too.
Internal Microprocessor System
Your printercontains a microprocessor system that resets and executes a diagnostic
and initialization sequence when you turn on the power.
In addition, it contains a ran-
dom access memory (RAM) in which you can store formatting data, Because your
printer is
an "intelligent" peripheral, it uses none of your computer's memory.
Specifications
Table 1 shows the specifications for the MPS-802 Printer.
TABLE 1
Model 1526 Printer Specifications
Printing Method
Print Rate
Print Direction
Column Capacity
Character Font
Line Spacing
.Character Size
Copies
Ribbon Type
Ribbon Life
Ribbon Cartridge
Paper Width
Forms
"Lines per minute
Serial Impact Dot Matrix
45 Ipm" with 80 columns printed
78 Ipm with 40 columns printed
124 Ipm with 20 columns printed
Bi-directional
80
8X8
Programmable
0.094" high, 0.08" wide
3, including original
Cartridge
1.2 X 10
8 characters
Commodore
PIN 613160550
4.5" to 10" (including tractor holes)
7.5 + (0.5 X 2 sprocket margins)
Pin-tOopin distance: .5" longitudinally
2
9.5" laterally
5132" diameter

UNPACKING YOUR PRINTER
Before you unpack your printer, inspect the shipping carton for signs of damage. If it
appears to be damaged, be especially careful when you inspect its contents. DON'T
throwawayany ofthe packaging material until you have locatedall thecontents
of the
carton! The package should contain:
1. Commodore Printer, Model MPS-802
2. Serial Cable
3. User's Manual
4. Warranty card
5. Printer ribbon cartridge
If any
of these is missing or damaged, notify yourCommodore dealer Immediately.
3

Section 2
PREPARING TO USE YOUR PRINTER
Before starting touse yourprinter, you should makesure that itisinworking condition.
This proceudre includes checking for obstructions in the path
of the print head or
paper feed and making sure that the printerribbon is properly in place. Follow this pro-
cedure:
1. Lift the plastic cover gently to expose print head and mechanism.
2. Carefully remove any foreign material that may have fallen into the mechanism.
3. Remove the ribbon cartridge from its box and turn the plastic knob
counterclockwise so the ribbon is tight.
4. Hold the ribbon cartridge with the plastic knob at the top left side, then set it on the
two side frames
of the printer mechanism with tilting the cartridge so the two front
hooks on the side frames
be engaged with two catches on both left and right sides
of bottom
of cartridge, then steer down while pressing the ribbon side so the two
side tabs
of cartridge are positioned into the slots on the side frames of the printer
mechanism.
5. Turn the plastic knob on cartridge in the direction ofthe arrow to take up the slack in
the ribbon. Continue to turn the knob until the ribbon slips into front of printerhead
by itself.
. Figure 2A. The Ribbon Cartridge
6. Replace the plastic cover.
7. Insert the wire paper holder in the two holes in the rear of the cabinet as shown in
figure
2B.
Figure 28. Wire Paper Holder
4

COMMODORE PRINTER
SERIAL CABLE
Figure 3. Printer to Computer Hookup
Figure
4. Multiple Hookup
5
COMMODORE PRINTER

CONNECTING THE PRINTER TO YOUR COMPUTER
To connect your printer to your Commodore computer, please follow the instructions
in the order listed below.
a. Make sure that both-your computer and printer are turned OFF.
b. Connect one end of the S-pin DIN_ cable to either of the two connector sockets
located in the back
of yourprinterat tne lower left. This cable is "keyed" so that you
cannot plug the cable
-in the wrong way. This means that thepinsshould be positIon-
ed so that a slight pressure will insert the cable properly. You should not have to
force these pins
in, and doing so could damage your cable.
c. Connect the other end of the cable to your computer in the Serial Port Connector
located in the back
of yourcomputer. Make sure that you are "keying" the pins pro-
perly into the connector with Sholes.
d. Now plug the printer's power cord into a standard AC wall outlet. However, do NOT
turn the equipment on yet.
INSTALLING THE PAPER
The tractor feed printeraccepts standard fan-folded pin feed paper. You can purchase
this paper from your local Commodore dealer.
The paper drive in this printer may be adjusted
to accept varying widths of paper. This
is done by sliding the pin feed mechanism
to the desired position. Depress the paper
feed button in the upperright-hand top panel
to advance the paperafter it is loaded. To
remove the paper, open the feed mechanism retainers and pull the paper out.
PLATE ..
Figure 5. Paper Path
CAUTION: DO NOT FEED PAPER BACKWARDS.
6

Figure 6. Inserting Paper Into MPS.802
PERFORMING THE POWER·ON TEST
You are now ready to proceed with the power-on part of the checkout:
1. Turn on the AC power to your computer and verify that is is working correctly.
2. To turn on the power to the printer, press the rocker switch at the side of the printer
so that the white dot is visible. In response to the application of AC power, the .
printer's microprocessor should move the print head all the way to the right, then to
its home position at the far left. If this does not happen
(and that's highly unlikely),
turn
off both machines, check all cor nections and try again. If you still get no
response, contact your Commodore dealer.
PERFORMING THE PRINT HEAD TEST
You can test the print r.ead (and the ribbon cartridge as well) afteryou have inserted the
paper. NEVER al:ow any printing
to occur when there is no paper in the printer. To do
so may result
in damage to the print head. To perform this test, simply turn on the
printer wh
Ie pressing the paper feed button. Turn power off to end the test.
!4I."/,& O( ).+, - ,/01234:56788' 1(. )?e!A8CDEFGHIJKl..~PQRSTUVWXYl[ ,It ..... -.J • .., 1t-.'-1_r-'-
! 4I.-r/.& 0 ( ). +, - , /0 1234:56789' I ( ~ )?e!ABCDEFGH I JKl..~PQRSTUVWXYl [ , It ..... -.J • .., It- .'-1_r'-r
"$""/.& 0 ( ). +, - , /01234:56789. '( • )?e!ABCDEFGH I JKl..~PQRSTUVWXYl [ , It ..... -.J • .., It- .'-1 _ r-'-T1
,../.&' ( ) $+, -. /01234:56789' J<. )?e!ABCDEFGH IJKl..M'«JPQRSTUVWXYz[ '·It ..... -.J • .., I h'-1_r-'-T11
y..s.0 ( ) •• , -, /01234:56789" < .. )?e!ABCDEFGH IJKl..~PQRSTUVWXYz[' It ..... -.J • .., It-.'-1_r-'-T11 I
& 0 ( ) *+ , - , /01234:56789. ; ( " )?S!A8CDEFGH I JKl..~PQRSTUVWXYZ [ , It ..... -.J • .., It- .'-1 _ r-'-T11 I I
o ( ). +, - , /0 1234:56789 • ; ( =>?I!!ABCDEFGH I JKl..MNOPQRSTUVWXYl [ , It ..... -.J • .., 1t-.'-1_ r-'-T11 I r
( ) *+, -, /01234:56789'; <= )?e!A8CDEFGH IJKl..~PQRSTUVWXYl[' It ..... -.J • .., It-.'-1_r-'-T11 I •
)$+, -', /0123456789'1(" )?I!!ABCDEFGH I JKl..M'IOPQRSTUVWXVZ [ 'It ..... -.J • .., 1t-.'-1_r-'-T11 I ••
",'., /01234:58789', <a )?e!ABCDEFGH IJKl..I'NJPQRSTUVWXYZ[' It"'I.-.J • .., 1t-.'-1_r-'-T11 I .-..J
• , - • /0 123456799 I ; ( • )?e!ABCOEFGH I JKl..M'IOPQRSTUVWXYl [ , It ..... -.J • .., It-. '-1 _ r-'-T11 I .....
,-, /111234:56789' J( ~ >?e!ABCDEFGH IJKl..Ml-DPQRSTUVWXYl[ 'It ..... -.J • .., 1t-.'-1_r-'-T11 I ..... .
- , /0123456789' , < .. )?I!!ABCDEFGH I JKl..Mt-DPQRSTUVWXYZ[ , I t"'I.- .J • .., It- .'-1_ r-'-T-i I I ..... ...
,/0123456789', < ~ )?S!A8CDEFGH IJKl..Ml-DPQRSTUVWXYZ[, It ..... -.J • .., 1t-.'-1 _r-'-T11 I ........ .
/0123456789' '( ~ )?l!!ASCDEFGHIJKl..M'IOPQRSTUVWXYZ[' It ..... -.J • .., It- .'-1_r-'-T11 I ......... ..
7

Section 3
USING YOUR PRINTER
Yourprinterdoesmuch morethan just giveyou clean, fast copy. Since it has itsown in-
ternal microprocessor system,
it is very versatile. In this section you will learn how to
use your printer to print out listings, program results, and graphic displays. You will
learn how
to use it to format data and enhance charactersize. You will even be able to
create your own custom characters.
Before you attemp.t
to use your printer, make sure you know how to do the following:
1. Operate your Commodore computer.
2. Do elementary programming in BASIC.
3. Write files to and from a peripheral device such as the DATASSETIE* recorder or
the Commodore Floppy Disk Drive.
4. Open and close files.
You should refer to your computer User Manual for this information.
This section uses these conventions
to indicate cerain actions or requirements.
Example
dn
Description
Italicized lowercase letters in a syntax indicate that
you should enter something
(a variable) in place of
the letters.
Brackets indicate optional usage.
NOTE: The commands described in this manual apply specifically to
use with the printer. Certain commands may follow a slightly different
general form or produce different results from those described here
when they are used for the computer or other peripheral devices. Con-
sult the appropriate manual for the exact usage
of these commands in
other contexts.
'OATASSETTE is a trademark of Commodore Electronics. Ltd.
8

PRINTER·ASSOCIATED COMMANDS
The OPEN Command
The syntax. of the OPEN command is:
OPEN Ifn, dn, [s~J
This command sets Ii correspondence between a file number and a physical device.
The
Ifn or logicalfile may be any numberyou choose toassign toyourfile from 1to 255.
It doesn't matter which number you choose as long as you remain consistent
throughoutyourset
of commands.Thedn ordevice number(alsoknown as the primary
address) refers to the device to which you wish to send the file.
In the case of the
printer, the number must
be 4 since that is the number assigned to it at the factory.
NOTE: If you want to change a printer device number, you can have it
changed by
an authorized Commodore technician. See your Com-
modore dealer about this.
(You might want to have a printer's device
number changed if you have two printers attached to your computer.
You need
to refer to each of them individually; hence, the need to
change one
of the device numbers.)
The
sa orsecondaryaddress is used tospecifyaparticularprinterfunction. Secondary
addresses are thoroughly discussed in the section entitled FORMAT CONTROL.
The CMD Command
The syntax of this command is:
CMD Ifn
CMD transfers output from the screen tothe printer. The Ifn must be thesame as in the
OPEN statement with which it isassociated. Unlike a PRINT command, the line orbus
to the receiving device is left open. The line or bus tothe receiving device (in this case,
the printer) is said to
be "listening." If you follow a CMD command with a PRINT or a
LIST command, the output is directed to the printer instead of the screen.·
9

The PRINT # Command
The syntax of the PRINT # command is:
PRINT # Ifn, data
PRINT# works just like PRINT except that it directs output to the printerinstead ofthe
video screen. Afterprinting the designated data, the line orbus
to the printer is said to
be "unlistened." Therefore, if you have used the CMD command, it is necessary to
follow it with a PRINT # command in order to "unlisten" the connection between the
printer and the computer.
NOTE: In standard Commodore BASIC, the PRINT command can be ab-
breviated as a question mark (?). You may not do this with PRINT #. It
must always be typed out as PRINT
#.
The CLOSE Command
The syntax of this command is:
CLOSE Ifn
You should always close afileafterprinting to it. You may not exceed ten open files, so
you should make a habit of closing files when you are finished with them. This way you
will always have the maximum number of files available for use.
Remember when using the CMD command, since CMD does not "unlisten" the line to
the printer, you must always precede a CLOSE command with PRINT#
in order to pro·
perly close the file.
Example: Right
OPEN 5,4
PRINT 115 i "HELW THERE"
CLOSE 5
OPEN 5,4
CMD 5, "HELLO THERE" not
PRINT 115;CLOSE 5
OPEN 5,4
CMD 5,"HELLO THERE" not
PRINT 115,"HELLO THERE"
CLOSE 5
OPEN 5,4
,PRINT lt5,"HELLO THERE" not
CMD 5,"HELLO THERE"
PRINT lt5:CLOSE 5
Wrong
OPEN 5,4
CMD 5, "HELLO THERE"
CLOSE 5
OPEN 5,4
CMD 5,"HELW THERE"
PRINT 115, "HELLO THERE"
PRINT 115: CLOSE 5
OPEN 5,4
PRINT 115,"HELW THERE"
CMD 5,"HELLO THERE"
CLOSE 5
Armed with these thumbnail descriptions of what the printer-related commands do,
you can now proceed
to the next part of this section. which tells you how to use these
commands to control your printer. You can find more detailed information about these
commands in your computer User Manual.
10

PRINTING IN THE DIRECT MODE
The direct mode of communication allows you to enter printing commands at the
keyboard.
The following example shows the entire direct mode listing process
of a short
program.
Example:
You type: The screen displays:
OPEN
3,4
OPEN 3,4 READY.
CMD3 CMD3
LIST LIST
PRINT # PRINT #3
READY.
CLOSE 3 CLOSE 3
READY.
The printerprints: Comments:
READY.
You open the file and
give
it a /In of 3. The 4
makes the file available
to
the printer.
The printer is,"listening."
The program is printed
on the printer.
The printer is
"listening."
Use the PRINT #
command
to "unlisten"
the printer.
You close the file
so that
Ifn 3 can be used for
something else.
PRINTING UNDER PROGRAM CONTROL
As we have seen, you can control the printerdirectly from the keyboard. You can also
control the printer from within a BASIC program. In the example below, this short
BASIC program is placed
in the computer's memory. (It could have been placed there
from the keyboard, a cassette tape, or a floppy disk):
10 OPEN 3,4
20 PRINT
t
3, "THIS PROGRAM ILLUSTRATES
30 CLOSE 3
WO SlfJt,.';; f'l_Iv .. '.f-·pIII ,
f-ltF'E
PROGRAM CONTROL"
REMEMBER THIS: The LIST command within aprogram terminates pro-
gram execution. Then, when you
are finished running a program, you
must type the
PRINT # command to close the channel. Then type the
CLOSE command to close the file.
11

The following example shows a BASIC program that takes advantage of some of your
printer's special features. The program directs the printer to generate the following:
•
An enhanced heading. You will find more about this feature on page 33.
• The entire printer character set.
Two special character functions are used in the program: the OFF/RVS key and the
CRSR Down (Cursor Down) key. You may find out more about these starting on page
26.
A printout of a program you place in your computer's memory looks like this:
10 OPEN 4,,4
20
FOR I = 32 TO 95
30 FOR I = 160 TO 223
40 C$="-8"+A$
50 0$="-8"+B$
60 E$="I' +A$
70 F$="" +B$
8,0 G$="" +C$
90 H$="" +0$
100 PRINT #4,CHR$(14)"MOOEL
110 PRINT 4:PRINT ~4:PRINT
120 PRINT i4, A$
130 PRINT #4, B$
140 PRINT #4, C$
150 PRINT #4, 0$
160 PRINT lA, E$
170 PRINT #4, F$
180 PRINT #4, G$
190 PRIN #4, H$
200 CLOS 4
12
:A$=A$+CHR$(I):NEXT
:B$=B$+CHR$(I):NEXT
1526 PRINTER CHARACT~R SET"
#4

Here is an explanation of each statement in the program.
Line No. Explanation
10 Opens the printer as a file for printing.
20 Sets A$ equal toastring containing all the unshifted characters from the
keyboard.
30 Sets B$ equal to a string containing all the shifted characters from the
keyboard.
40 Sets C$ equal to the set of all unshifted characters in reverse field. The
character between the quotes is entered by pressing: .. _.. ".
50 Sets D$ equal to the set of all shifted characters in reverse field.
60·90 Each time a PRINT statement is encountered, as.in lines 120-190, a Car-
riage Return is executed (unless asemicolon is placedat the end of the
preceding
PRINT statement). Therefore, each string, as in lines 160-190,
must begin with a Cursor Down to reset the printer to lowerc~e.
NOTE: The use of a Cursor Down to set to lowercase and Cursor Up to
reset to uppercase enables you to use upper-
and lowercase letters on
the same line.
60 Sets E$ = toaCursor Down plus A$. The character between the quotes
is entered
by pressing: .. • ".
70 Sets F$ =to a Cursor Down plus B$.
80 Sets G$ =to a Cursor Down plus C$.
90 Sets H$ =to a Cursor Down plus D$.
100-190 PRINT #4 tells the computertoprint to device4(in thiscase, the printer).
100 CHR$ (14) increases the width of the printed character to twice its
original size. This line prints the title of the program
in 'enhanced
characters.'
110 Prints three Carriage Returns on the printer.
120-190 Prints each of the strings constructed in lines 20 through 90 on the
printer.
200 Closes the printer channel.
NOTE: Printing a listing from within a program terminates the program.
Therefore,
LIST should be placed at the end of the program.
13

To execute this program, simply type:
RUN
This is the result:
MODEL.
1
'526
PR
I
r-
.....
TER
SET
I
"11$/:,&'
( ) *
+,
-.
/0<1123456789:
;
<
">?I!1A8COEFGH
I·JKLMNOPQRSTUVL<lXY2[
£.
]"to-
1.--1
iii..,
n.L,_.-L-r-I11
r-"_....
8,J.-.-..,~-_,
h
.....
'L·vf!8-.'
rXOIo
,.-+1
,
..
~
_!7'ZT
is
.......
'
.................
eW_
..
'Q
.,
__
"
......
,
4_
..
I
......
~IIiiIiiI!!I.£SU
__
t1!U-.aa.
...
I
IItf$"<.~;
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Now, close the channel and the file, type:
PRINT
114
CLOSE 4
14

FORMAT CONTROL
Through the printer's format control option, you can control the interpretation of data
sent
to the printer. The format control option allows you to print numbers in columns,
set the numberof lines per page, and perform other useful formatting tasks. To imple-
ment the format control option, you use the third parameter of the
OPEN command.
OPEN Ifn, dn, sa
As before, Ifn is the logical file number, dn is the device number (also known as the
primary address), and
sa is the secondaryaddress. It is in the secondary address posi-
tion that you enter the desired parameter.
You can enter any of the eleven secondary addresses in your OPEN command. These
are:
o Print data exactly as received in Upper/Graphics case.
Print data according to a previously-defined format
2 Store the formatting data
3 Set the number of lines per page
to be printed
4 Enable the printer format diagnostic messages
5·Define a programmable character
6 Set spacing between lines
7 Print data exactly as received in Upper/Lower case.
9 Suppress diagnostic message printing
10 Reset printer
After the appropriate
OPEN statement has been transmitted, a PRINT # statement is
required to transmit the secondary address information to the specified device (in this
case, your printer).
Remember that it is possible to have
as many as ten files open simultaneously. This
allows you to perform several formatting functions at one time on the data in the com-
puter's memory. There
are examples of the formatting capabilities described in this
section in the Appendix.
15