Commodore MPP-1361 User manual

Commodore
CBM Bi-Directional
Printer
User's Manual
rxcommodore
COMPUTER

"WARNING -THIS EQUIPMENT GENERATES, USES, AND CAN RADIATE
RADIO FREQUENCY ENERGY AND IF NOT INSTALLED AND USED IN
ACCORDANCE WITH THE INSTRUCTIONS MANUAL, MAY CAUSE INTER-
FERENCE TO RADIO COMMUNICATIONS. IT HAS BEEN TESTED AND
FOUND TO COMPLY WITH THE LIMITS FOR ACLASS ACOMPUTING
DEVICE PURSUANT TO SUBPART JOF PART 15 OF FCC RULES, WHICH
ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST
SUCH INTERFERENCE WHEN OPERATED IN ACOMMERCIAL ENVIRON-
MENT. OPERATION OF THIS EQUIPMENT IN ARESIDENTIAL AREA IS
LIKELY TO CAUSE INTERFERENCE IN WHICH CASE THE USER AT HIS
OWN EXPENSE WILL REQUIRED TO TAKE WHATEVER MEASURES MAY
BE REQUIRED TO CORRECT THE INTERFERENCE."
Dieses Handbuch wurde gescannt, bearbeitet und ins PDF-Format konvertiert von
Riidiger Schuldes
[email protected]
(c) 2003

Commodore
CBM Bi-Directional
Printer
User's Manual
MPP-1361
Part Number 251198
April 1983
COMMODORE BUSINESS MACHINES, INC.

TABLE OF CONTENTS
Page No.
Section 1:GENERAL INFORMATION 1
DESCRIPTION 1
Printing Characteristics 1
IEEE-488 Interface 3
Paper feed Mechanisms 3
Feed Button 3
Printer Ribbon 3
Internal Microprocessor System 3
Specifications 3
UNPACKING YOUR PRINTER 5
Section 2: PREPARING TO USE YOUR PRINTER 6
CONNECTING THE PRINTER TO YOUR COMPUTER 7
PERFORMING THE POWER-ON TEST 8
Printer Self-Test 9
Error Indicator 9
INSTALLING THE PAPER 9
REMOVING THE PAPER 10
PERFORMING THE PRINT HEAD TEST 10
Section 3: USING YOUR PRINTER 11
SPECIAL PRINTER-ASSOCIATED COMMANDS 12
The OPEN Command 12
The CMD Command 12
The PRINT Command 13
The CLOSE Command 13
PRINTING IN THE DIRECT MODE 14
PRINTING UNDER PROGRAM CONTROL 14
FORMAT CONTROL 19
Printing Data Exactly As Received: sa=0 20
Printing Data according to aPreviously
Defined Format :sa =120
Storing the Formatting Data: sa=2 21
The Formatting Characters 21
Numeric 21
Alpha (String Data) 24
Skip (Blank) 24
Literals in Format Strings 24
Setting the Number of Lines Per Page: sa=3 25
Enabling the Printer Diagnostic Messages: sa=4 26
Diagnostic Messages 26
Defining aProgrammable Character: sa=5 27
Setting Spacing Between Lines: sa=6 29
Setting Upper or Lower Case: sa=7 29
Selecting ASCII/Graphics: sa=8 30
Suppress Diagnostic Message Printing: sa=9 30

Resetting the Printer sa =10 30
Setting Uni-Direction Mode: sa =11 30
Resetting Uni-Direction Mode: sa =12 31
Setting Condense Mode: sa =13 31
Resetting Condense Mode: sa =14 31
Setting Pseudo Letter Quality Mode: sa =15 31
Resetting Pseudo Letter Quality Mode: sa =21 32
Storing Bit Image Data: sa =17 32
Printing Bit Data Previously Written sa =18 33
SPECIAL CHARACTER FUNCTIONS 33
Enhanced Characters 33
Paging 34
Specifying Individual Upper- and
Lower-case Characters 34
Reversing aField 36
The Carriage Return 36
Quotation Marks 36
LIST OF TABLES
Table
1MPP-1361 Printer Specifications 4
2Formatting Examples 23
3Special Control Character Summary 35
LIST OF ILLUSTRATIONS
Figure
1Feed Mechanism and Ribbon Cartridge 2
2The Printer Cartridge 6
3Printer to Computer Hookup 7
4Multiple Hookup 8
APPENDIX AA1
Simple String Formatting A2
Leading Zeroes Forced A4
Signed Numbers A5
Decimal Fraction Specification A6
Fixed and Floating $Fields A7
Mixed Format Field Types A8
Formatting With Literals A9
APPENDIX BB1
ASCII Character Codes B1
APPENDIX CC1
SAMPLE PROGRAM OF BIT IMAGE C1

Section 1
GENERAL INFORMATION
With the purchase of aCommodore CBM Printer, you have added agreat deal of versatility
and convenience to the use of your Commodore Computer. You have purchased the Tractor
Feed, Friction Feed Bi-Directional MPP-1361, While this manual contains all the information you
need to check out, connect, and operate your printer, you should also refer to other Commodore
manuals to get the most out of your computer system.
NOTE TO BUSINESS KEYBOARD USERS ONLY: If you wish to duplicate the
examples in this manual and you are using the CBM Business Keyboard
computer, you should type the BASIC command POKE 59468, 12 at the
beginning of each session with your computer and printer.
DESCRIPTION
Your CBM printer is designed to operate through software control. It prints upper- and lower-
case alphabetic characters, all the graphic characters available from your Commodore com-
puter, and even custom user-defined characters. Additionally, your printer has considerable
formatting capability owing to its own internal microprocessor system.
PRINTING CHARACTERISTICS
Your printer employs aBrother print head. The eight-wire heavy-duty jeweled head has alife
expectancy of 100 million characters. If aprint head malfunction should occur, obtain authorized
technical assistance. Failure to do this may void your warranty.
-1-

r"""- "-—-»— IIUIHMIINHi^
jBE ~B~
;;;ii;7;i;:
III Illll Illll liiiuisuinimuni
Figure1.Feed Mechanism and Ribbon Cartridge
-2-

IEEE-488 Interface
The MPP-1361 Printer conforms to IEEE-488 interface requirements and may be connected
directly to your Commodore computer. The printer is designed to be used with the Commodore
CBM Floppy Disk Drives and may be daisy-chained with other IEEE-488 devices.
Paper Feed Mechanisms
The MPP-1361 Printer employs both atracter feed and afriction feed mechanism. You can use
either pin-fold paper or no pin-fold paper. To select atracter feed or afriction feed, the Feed Select
Lever (on the left side of mechanism) is used.
FEED Button
The MPP-1361 Printer has two FEED BUTTON. One is the FORM TOP button, the other is the
LINE FEED button. FORM TOP button feeds one page of paper, and LINE FEED button feeds
one line per one push.
Printer Ribbon
The printer ribbon (shown in Figure 2) is an easily-loaded cartridge.
Internal Microprocessor System
Your printer contains amicroprocessor system that resets and executes adiagnostic and
initialization sequence when power is applied. In addition, it contains arandom 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 1shows the specifications for the MPP-1361 Printer.
-3-

TABLE 1
Printing Method
Print Rate
Print Direction
Column Capacity
Character Font
Column Spacing
Line Spacing
Character Size
Copies
Ribbon Type
Ribbon Life
Paper Width
Forms
MPP-1361 Printer Specifications
Serial Impact Dot Matrix
150 character per second
40 Ipm with 136 columns printed
75 Ipm with 68 columns printed
110 Ipm with 34 columns printed
Bi-directional with logic seek
normal 136 characters
condense 250 characters
5X8 dot matrix
1/10" -10 characters per inch
Programmable (72 step per inch)
0.116" high, 0.08" wide
3, including original
Cartridge
1million characters
15" computer folded paper
5"~15"+ .5X2 (sprocked margins)
Pin to pin distance: 5" longitudinally
9.5" Laterally
5/32" 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. DONTthrow away any of
the packaging material until you have located all the contents of the carton! The package
should contain:
1. Commodore Printer MPP-1361
2. User Manual (P/N 251198)
3. Warranty Card
4. Printer ribbon cartridge (2)
5. Power code
If any of the first five items are missing or damaged, notify your Commodore dealer immediately.
Additionally, you must obtain the appropriate cable from your Commodore dealer to connect
your printer to your computer. See Section 2, page 7, for information about which IEEE cable
to get.

Section 2
PREPARING TO USE YOUR PRINTER
Before using your printer, you should make sure that it is in good working condition. The
following procedure includes checking for obstructions in the path of the print head or paper
feed and insuring that the printer ribbon is in place and properly set:
1. Open the printer lid
2. Carefully remove any foreign material that may have strayed into the mechanism or electronics
3. Install the printer ribbon cartridge
4. Close the printer lid.
Figure 2. The Printer Cartridge

CONNECTING THE PRINTER TO YOUR COMPUTER
One of two connector cables is required to connect the printer to the computer:
1
.
PET-to-IEEE cable, P/N 320101
Use this cable if the printer is to be the only IEEE device connected to your computer.
2. lEEE-to-IEEE cable, P/N 905080
Use this cable if you will be using your printer in conjunction with the Dual Drive Floppy Disk.
Follow these steps to connect your printer to your computer:
1
.
Turn off the AC power to your computer.
2. Place the printer in aconvenient location close to the computer. DO NOT connect the
printer to an AC outlet at this time.
3. If you are using the PET-to-IEEE cable, connect the cable between the IEEE-488 interface
connector on your computer and the connector on the printer as shown in Figure 3. If you
are using the lEEE-to-IEEE cable, connect the printer in aconfiguration similar to that
shown in Figure 4.
4. Connect the printer's power cord to an AC outlet. DO NOT turn on the power at this time.
COMMODORE
COMPUTER
PET-TO-IEEE CABLE
(P/N 320101) COMMODORE PRINTER
Figure 3. Printer to Computer Hookup
-7-

DUAL DRIVE FLOPPY DISK,
COMMODORE COMPUTER
COMMODORE PRINTER,
Figure 4. Multiple Hookup
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 it is working correctly.
2. To turn on the power to the printer, press the rocker switch (located toward the rear on the
right side of the printer). 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 connections and try again. If you still get no response, contact your Commodore
dealer.
-8-

Printer Self-Test
The printer initialization process provides atest on the RAM, ROM, and the timers. If afailure
is detected, the LED will blink aspecific number of times to indicate the fault. The flash code -
is repeated continuously with aone second pause separating each group of flashes. The
following lists the flash codes:
Number of Flashes Resource
1Zero-page RAM
28K ROM
36522 Timer
46532 Timer
56532 Timer
Error Indicator
After the printer passes the initialization self-test, the LED is used as a power-on and failure
indicator. If the LED flashes at ahigh rate (approx. 8/sec), the carriage has failed to reach the
home position or the carriage has been blocked. If the LED flashes at aslow rate (approx.
2/sec.), it is an indication that the printer is out of paper, the plastic cover is lifted. In either case, nor-
mal printing can be resumed after the problem has been solved and the top-of-form button is de-
pressed.
INSTALLING THE PAPER
Now that you have positive responses from all of the previous steps, you can load the paper.
The MPP-1361 Printer accepts both pin-fold paper and the no pin-fold paper. To load the paper,
follow the procedure below.
1. Raise the Printer lid.
2. Pull the Feed Selection Lever (on the left side of mecanisms) forward.
3. Push the paper into the insertion slot from rearside.
When you use the pin-fold paper, follow the procedure below.
1. Raise the two sprocket lock levers to loosen and adjust the sprocket pin position to
accommodate the paper width.
2. Engage the paper feed holes onto the feed pins, and adjust the paper tension. Push the paper
holding covers and two sprocket lock levers down.
When you use the no pin-fold paper, follow the procedure below.
1. Raise the two sprocket lock levers to loosen and adjust the sprocket to the paper width.
2. Push the Feed Selection Lever to rearward.

REMOVING THE PAPER
To remove the fanfold paper, follow either of the two methods described below:
1.To disengage the paper from the paper holding mechanism, pull it forward out of the
printer.
NOTE: Do not attempt to pull the paper out in the backward direction.
2. Feed the paper out of the printer by pressing the TOP OF FORM (details are described later).
PERFORMING THE PRINT HEAD TEST
You can test the print head (and the ribbon cartridge as well) after you have inserted the
paper. NEVER allow 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 off the printer, then turn it
back on while pressing the TOP OF FORM button. It is necessary to hold the TOP OF FORM down
until the head starts to move. The printout will be as follows:
i#*?iA 'O*+ ,-.,'Tt 123456789 : : <=>?@HBCDEFGH IJKLMNOPQRSTUVWXVZ CS3tH "J1WiVH_r-1-!#*>
ZC\ltH«_JI\nf ll-i l-,_rJ-rtt*;;*'':>*+,-./ei234567S9:;<=>?eHBCDEFGHI.JKLr'1HuPQRSTUVHXVZCSD1
DEFGH IJKLMNOPQRSTUVWXVZ tS3tH »~J1Wth*L-1r-m I'<& '<- >*+ ,-./& 1£3456789 :;<=>?@flBCDEFGH
.XOl 23456789 :K=>?@RBCDEFGH IJKLMNOPQRSTUVWXVZ C\ 31«-| """J1 W? 11- h_rJ-H IIl'()*+,-./0i:
«? tf- l_,_ r-J-r-l II |"~0 *+..-. XS 123456789 :;<=>?@RBCDEFGH I.JKLMNOPQRSTUVWXVZ CS3tH "J1bF IV
QRSTUVWXVZ C\]tH .""J 1UT 1i- —H-rH III—*+,-.X0 123456789 :.: <=>?@RBCDEFGH IJKLMNOPQRSTL
:<<>?eflBCDEFGH IJKLMNOPQRSTUVWXVZ C\ 3t*-|,.""\J 1k*r11- h_r-L-r-l II I -J» ,~ X0 123456789 :;<=>'
Ir~-_t "~ XO 123456789 :;<=>?@RBCDEFGH I.JKLMNOPQRSTUVWXVZ C\3t*i ."J sS UF Ih.H_r-L-H II I .
1"H-~J 1UF lh 1L-i_i-L-r-ll Ir™-Ji u»ve123456789 :;<<>?SRBCDEFGH IJKLMNOPQRSTUVWXVZ C\ 3t*t«_
HI.JKLMNOPQRSTUVWXVZ CS]+<HI m~J ®yr IV•H_r-m II I __li *J"V-l 23456789 :.: <=>?©RBCOEFGH IJKL
23456789: !<=>?@RBCDEFGHI JKLMNOPQRSTUVWXVZ CN JTH «"""J 1hf 11- .>-, _r-H-l 1Ir~-Ji «-"" V-* I345«
,L., _r-L-H |||
—
mJ„ -> %-* |-456789 :;<=>?@HBCDEFGH I.JKLMNOPQRSTUVWXVZ C\]T-H «~J1tsF!!-<-,_,
UVWXVZCS3+**.-J1tsT |J- ,l-,_ r-L-HI II—-_Ji "-J «—*i—-6789:.:<=>?@HBCDEFGHI,TKLMN0PQRSTUVWXS
7SRBCDEFGH IJKLMNOPQRSTUVWXVZ CX3TH «~J 1y11- •>-. _r-SH II I -Ji ,J "V-* I-—-I 89 :.: <=>?@RBC
mj, j»%_*|——-I |9 :;<<>?@RBCDEFGH IJKLMNOPQRSTUVWXVZ C\ 31 HI «"J1U^ 1h—i_r-1—i—11I I -J. '-
~J 1UF 11- «i—,_r-1—r-II Ir~__Jt *-i,mw~*\ -I k'-;<=>?eflBCDEFGHIJKLMNOPQRSTUVWXVZC\]t^.~"J 1
LMNOPQRSTUVWXVZ[\3t<HU~_l Li t*F lh.H_r-mi 1I—__k "J,'V-*t _-l I-.
,-'L=>?'i!FlBCDEFGHI,TKLMNOF
-I I-, '-JL»?aRBCDEFGH I.JKLMNOPQRSTUVWXVZ CS3 t^»«""J 1UF II-, l^.H-^ IIn~-_J. "-""V-*!—~-l I-.
r-mi Ir~-_W "-" V-*| —~-l kl-n_X.reflBCDEFGHIJKLMNOPQRSTUVWXVZ[\3tH«_J1IsT IhH_r———1
1
VZC\3+^»-J 1l»r ll-.S_H-^l Ir~-Ji *-imaw-*\ -I I-. '-,L-vr-*BCOEFGHI,TKLMHOPQRSTUVWXVZCS3
CDEFGHIJKLMNOPQRSTUVWXVZrOt^HI.-J 1\*T 11- ,h_r^-H IIf~~-Ji -).-* I——-I k'-' LX.-r~*_»DEFC
j^V*|——-_| |-, '-,L-..--rit_*l EFGHIJKLMNOPQRSTUVWXV2CS3tH«_J1ksF" 11- •lt_ r-1-^ III--h ,J, V-4
UF lh,'-,_rJ-!-ll In"_.Ji »J»V-*I —"-I k,-'L'--.'ri»-*'l ,>£>H IJKLMNOPQRSTUVWXVZ CX 31*!.'"*J1\
XTI
!
PQRSTUVWXVZCS3t-H,-J 1tsT lh."-,_ r-J-rH III-_Ji "J"*^* I—~-l kuLvm_»l ,XO<M JKLMNOPQRST
'-'L-'-T~1»_#l ,-XO^ UKLMNOPQRSTUVWXVZCS3tH«~J 1kJ* 11- ."-i _H-^ IIP~_J. ,J *V-* I—_-l I-, '-'L'-..'
III—__U «J« V-41—"-I k^LVfll-*! ^XD* t*4LMH0PQRSTUVWXVZCS:tH«-J1fc^ 11- •t-. _rJ-H IIT~~
3tHI»-J 1UT ll-.h-H-HI Ir--Ji •-"r-*|—--I I-, l-JLv--n»-*l ,*n* 1»4I inopqrstuvwxvzcsji-h.
Of l*-H |trOPQRSTUVWXVZC\3r+HI»_J1ksT 11- •>-, _r*-rA IIr~_J. "J"*r-* I—--l I-. '- ,L---'ri»_#l ,XO* \*-\
*|——-I I-, ^LVTH-*I .'XO* t»4-S |fr^QRSTUVWXVZ[S3t<HI -~J 1UsF INh-r-mi I I --J. '-"'r-tl —_
l-.L-i-r-J-HI II—-_J. '->"•*-* \—--I k,-'L_-----T—»-_*1 ,-XO* H»-K! Ifr^bcSTUVWXVZ i:\3tH -~J1l^T ll-.H_
TUVWXVZ[\3tHI«-J 1kr 11- .>-,_ r-^-i-ll Ir~-J. «-"V*|-—-I k,-'LX.-n»_#l ,XO* |*4I |tr^ak.cdeUVW:«
You know how to connect your printer to your computer, how to check it out and how to insert
the ribbon and paper. You are now ready for the next step: putting your Commodore printer to
work.
-10-

Section 3
USING YOUR PRINTER
Your printer does much more than just give you clean, fast copy. Since it has its own internal
microprocessor system, it is veryversatile. In this section you will learn howto use your printer
to printout listings, program results, and graphic displays. You will learn howto use it to format
data and enhance character size. You will even be able to create your own custom
characters.
Before you attempt 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 aperipheral device such as the tape cassette recorder or the
CBM Floppy Disk Drive.
4. Open and close files.
You should refer to your computer User Manual for this information.
This section uses certain conventions to indicate certain actions or requirements:
Example Description
dn Italicized lowercase letters in asyntax
indicate that you should enter something (a
variable) in place of letters.
[]Brackets indicates optional usage.
NOTE: The commands described in this manual apply specifically to use with
the printer. Certain of the commands may follow aslightly different general
form or produce different results from those described here when they are
used for the computer or other peripheral devices. Consult the appropriate
manual for the exact usage of these commands in other contexts.
-11-

SPECIAL PRINTER-ASSOCIATED COMMANDS
When you want to print something on your printer, essentially what you are doing is
transferring the video screen function to the printer. Afew special BASIC commands allows
you to make this transfer. Most other BASIC considerations and rules remain the same.
Always remember to press the RETURN key after you type each command.
The OPEN Command
The syntax of the OPEN command is:
OPEN Ifn, dn, [sa]
This command sets acorrespondence between afile number and aphysical device. The Ifn
or logical file number may be any number you choose to assign to your file from 1to 255. It
doesn't matter which number you choose as long as you remain consistent throughout your
set of commands. The dn or ctew'ce number (also known 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 4since
that is the number assigned to it at the factory.
NOTE: If you should want to change aprinter number, you can have it changed
by an authorized Commodore technician. See your Commodore dealer about
this. (You might want to have aprinter'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 or secondary address is somewhat of aunique concept. It alerts the printer's
microprocessor system that formatting is to occur. Secondary addresses are thoroughly
discussed starting on page 19, under FORMAT CONTROL.
The CMD Command
The syntax of this command is:
CMD Ifn
CMDtransfers control from the computer to the printer. The Ifn must be the same as that in the
OPEN statement with which it is associated. Unlike aPRINT command, the line or bus to the -
receiving device is left open. The line or bus to the receiving device (in this case, the printer) is
said to be "listening." When you give the CMD command, the printer prints READY and is -
waiting for further commands. If you follow aCMDcommand with aPRINT or aLIST command
,
the output is directed to the printer.
-12-

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 printer instead of the video
screen. The line to the printer is closed after printing the designated data. The line or bus to
the printer is said to be "unlistened." Therefore, if you have used the CMD command, it is
necessary to follow it with aPRINT* command in order to close down the connection
between the printer and the computer.
NOTE: In standard Commodore BASIC, the PRINT command can be -
abbreviated as aquestion 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 afile after printing from it. You may not exceed ten open files so it is
well to make ahabit of closing files when you are finished with them. This way you will always
have the maximum number of files available for use. As you shall see later, one file may be open
under several logical file numbers at one time.
Remember, since CMD does not close the line to the printer, you must always precede aCLOSE
command with PRINT* in order to properly close the file.
Example:
Right Wrong
OPEN 5-4
PRINT#5,"HELL0 THERE"
CLOSE 5OPEN 5,4
not Cf1D 5, "HELLO THERE"
OPEN 5.-4 CLCic;E 5
CMD 5, "HELLO THERE" "*"
PRINT#5:CL0SE 5
-13-

OPEN 5,4
CMD 5, "HELLO THERE"
PRINT#5, "HELLO THERE"
CLOSE 5not
OPEN 5.,4
CMD 5," HELLO THERE"
PR INT#5 ,"HELLO THERE
"
PRINT#5:CL0SE5
OPEN 5,4
PRINT#5.,"HELL0 THERE" f
CMOS, "HELLO THERE"
PR 1NT#5: CLOSES
OPEN 5,4
PRINT#5, "HELLO THERE"
CMOS ,"' 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.
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 ashort BASIC
program. Afile containing asingle BASIC statement is typed into the computer's memory. The
file is opened, and the file is listed. After the file is listed, the output channel is closed and the
file is closed. The printer is now out of use and the computer is ready to accept new
commands.
Example:
107-THISISATEST"
—The screen displays: —
107'THISISATEST You place the data in the com-
puter's memory
OPEN 3. 4OPEN 3,4
READY
You open the file and give it a
Ifn of 3. The 4makes the file
available to the printer.
CMD 3CMD 3READY The printer is "listening"
LIST LIST 10 PRINT THIS IS ATEST
READY.
The program is printed on the
printer.
The printer is still 'listening."
PRINT#3 PRINT#3
READY Use the PRINT* command to
"uniisten" the printer.
OLOSE*3 CLOSE*3
READY You close the tile so that Ifn 3
can be used for something else.
-14-