4 * PROGRAM TITLE: O$LA (O$LA,O$LE,O$LH,O$LC,O$LF)
5 * LINE PRINTER ROUTINES
9 * 1.1 (2006-04-03) - GET IT SMALLER
18 * THESE ARE THE LIBRARY ROUTINES FOR HACHTI'S LINE PRINTER INTERFACE
20 * ******* SPECIAL VERSION CONFIGURED FOR 80*64 LASER PRINTER!
24 * DEPENDS ON HACHTI'S HARDWARE AND FORTRAN IV COMPILER TAPE
36 * DAC (BUFFER ADDRESS)
39 * THIS PRINTS ONE LINE OF LISING TEXT
40 * (60 2-CHAR WORDS MAX) TO THE LINE PRINTER.
44 * DAC (HEADING ADDRESS)
47 * SETUP THE LISTING HEADER
48 * RESETS THE PAGE COUNTER AND SPACES TO THE BEGINNING OF
53 * DAC (BUFFER ADDRESS)
56 * PRINT TEXT FROM BUFFER. NO CR OR LF IS OUTPUT.
61 * PRODUCE A CARRIAGE RETURN ON THE LINE PRINTER.
67 * SEND A LINE FEED COMMAND TO THE PRINTER.
74 * SPACES TO THE BEGINNING OF THE NEXT PAGE BY SENDING
75 * A FF CHARACTER TO THE PRINTER.
77 ********************************************************************************
79 SUBR O$LA TYPE A COMPLETE LINE WITH CR/LF, HEADING ETC.
80 SUBR O$LH INITIALISE HEADING
81 SUBR O$LP,T1 TYPE A LINE, NO CR
82 SUBR O$LC,T20 RETURN THE CARRIAGE
83 SUBR O$LF,T30 ADVANCE TO NEXT LINE
84 SUBR O$LE,FF EJECT PAGE
86 SUBR O$LSK1,SKP1 EMPTY LINES BETWEEN TOP OF PAGE AND HEADING
87 SUBR O$LSK2,SKP2 EMPTY LINES BETWEEN HEADING AND MAIN TEXT
88 SUBR O$LLPP,LPP PURE TEXT LINES PER PAGE
89 SUBR O$LRS,RS DISTANCE FROM PAGE NUMBERING TO RIGHT MARGIN
91 ********************************************************************************
97 LPP DEC 60 DATA LINES PER PAGE (WITHOUT HEADING ETC.)
98 LNW DEC 40 LINE LENGTH IN 2-CHAR WORDS
102 LDA* O$LA BUFFER ADDRESS
104 LDA LINE LEFT LINE COUNTER
105 SZE LINES LEFT ON PAGE?
106 JMP PGOK YES, JUMP AWAY
107 JST FF CALL FORM FEED ROUTINE
108 PGOK LDA LPP LINES PER PAGE
110 CAS LINES ARE WE ON THE FIRST LINE?
111 JMP *+2 NO, WE ARE NOT.
112 JST NP MAKE HEADER, SPACING ETC.
114 IRS LINE BUMP COUNTER
115 NOP WE DON'T CONTROL THAT HERE ANYMORE
116 JST T1 PRINT THE LINE
117 LBUF DAC ** ADDRESS OF LINE BUFFER
118 JST T20 CARRIAGE RETURN
120 IRS O$LA MAKE RETURN ADDRESS
124 O$LH DAC ** INIT HEADING
126 STA P1 POINTER TO SOURCE
128 STA P2 POINTER TO TARGET
138 LDA LPP LINES PER PAGE
140 STA LINE THE LINE COUNTER
141 IRS O$LH ADJUST ADDRESS
143 STA LN1 CLEAR PAGE NUMBERING
144 STA LN2 CLEAR PAGE NUMBERING
145 STA LN3 CLEAR PAGE NUMBERING
150 SKP1 DEC 0 EMPTY LINES BEFORE HEADING
151 SKP2 DEC 1 EMPTY LINES BETWEEN HEADING AND TEXT
152 NP DAC ** PREPARE NEW PAGE
153 LDA SKP1 SPACES BEFORE HEADING
154 SNZ SPACING REQUIRED?
155 JMP NHDS NO SPACE BEFORE HEADING
161 NHDS JST LNNR PREPARE LINE NUMBERING
163 HBUP DAC HBUF ADDRESS OF HEADER BUFFER
164 JST T20 CARRIAGE RETURN
166 LDA SKP2 NUMBER OF SPACES BEFORE TEXT
167 SNZ SPACING REQUIRED?
168 JMP NSPC NO, IT'S NOT.
171 SP1 JST T30 LINE FEED
172 IRS CNT DEC COUNTER, SKIP IF READY
180 STA LINE LINE COUNTER
189 XR DEC 0 THE CALLER'S X REGISTER
194 LINE DEC -40 NEG LINES LEFT ON PAGE
196 PGSP DAC PGS POINTER TO PGS
199 ************************************************************
203 STX XR SAVE CALLER'S INDEX REGISTER
220 LDX XR RESTORE CALLER'S INDEX REGISTER
265 * PRINT LINE NUMBER TO BUFFER
266 LNNR DAC ** INCREMENT LINE NUMBER, PUT TO BUFFER
267 JST LNR INCREMENT DIGIT
268 LN1 DEC 0 LEAST SIGNIFICANT DIGIT
269 JMP RDY NO CARRY, COUNTING READY
270 JST LNR INCREMENT DIGIT
271 LN2 DEC 0 SECOND DIGIT
272 JMP RDY NO CARRY, COUNTING READY
273 JST LNR INCREMENT DIGIT
274 LN3 DEC 0 THIRD DIGIT
276 RDY NOP OVERFLOW, BUT WHAT SHOULD WE DO?
279 LDA LN3 LEFTMOST VALUE (100)
286 LDA LN1 RIGHTMOST DIGIT (1)
287 ADD =48 ZERO CHARACTER
290 * MIDDLE VALUE CAN BE SPACE OR 0
291 LDA LN3 ASK LEFTMOST NUMBER
296 ZZ3 LDA LN2 MIDDLE VALUE (10)
298 ZZZ LLR 8 SHIFT UP AGAIN
299 STA PGS+4 STORE INTO POSITION
302 LDA HBP HEADER BUFFER ADDRESS
305 ADD ='40000 SET INDEX BIT
306 STA P1 TO WRITE POINTER
307 LDA PGSP PAGE NUMBER BUFFER ADDRESS
308 ADD =5 ADD PAGE NUMBERING LENGTH
309 ADD ='40000 SET INDEX BIT
310 STA P2 TO READ POINTER
318 RS DEC 0 RIGHT DISTANCE FOR PAGE NUMBERING (2-CHAR WORDS)
321 MDG DAC ** MAKE DIGIT FROM A
324 LDA =32 IS ZERO->SPACE
326 NZ ADD =48 THE ZERO CHARACTER
330 LNR DAC ** DIGIT SERVICE
331 IRS* LNR INCREMENT DIGIT
332 LDA* LNR LOAD NEW VALUE OF DIGIT
333 SUB =10 TEST IF OVERFLOW
335 JMP NOFL NO, TAKE FIRST RETURN
336 STA* LNR YES, CLEAR DIGIT (A WAS ZERO)
337 IRS LNR TALLY RETURN ADDRESS
338 NOFL IRS LNR TALLY RETURN ADDRESS
345 FIN WRITE OUT LITERALS