| 1 | /5 LP08/LS8E/LA180/LV8E HANDLER |
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| 11 | /COPYRIGHT (C) 1974,1975,1977 BY DIGITAL EQUIPMENT CORPORATION |
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| 22 | /THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE |
| 23 | /AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT |
| 24 | /CORPORATION. DIGITAL EQUIPMENT CORPORATION ASSUMES NO RESPONSIBILITY |
| 25 | /FOR ANY ERRORS THAT MAY APPEAR IN THIS DOCUMENT. |
| 26 | / |
| 27 | /THE SOFTWARE DESCRIBED IN THIS DOCUMENT IS FURNISHED TO THE PURCHASER |
| 28 | /UNDER A LICENSE FOR USE ON A SINGLE COMPUTER SYSTEM AND CAN BE COPIED |
| 29 | /(WITH INCLUSION OF DIGITAL'S COPYRIGHT NOTICE) ONLY FOR USE IN SUCH |
| 30 | /SYSTEM, EXCEPT AS MAY OTHERWISE BE PROVIDED IN WRITING BY DIGITAL. |
| 31 | / |
| 32 | /DIGITAL EQUIPMENT CORPORATION ASSUMES NO RESPONSIBILITY FOR THE USE |
| 33 | /OR RELIABILITY OF ITS SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY |
| 34 | /DIGITAL. |
| 35 | / |
| 36 | / |
| 37 | / |
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| 41 | / |
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| 43 | / |
| 44 | / |
| 45 | \f LPVERSION="C&77 |
| 46 | |
| 47 | *0 |
| 48 | |
| 49 | -1 |
| 50 | DEVICE LPSV;DEVICE LPT;1040;LPT&177;ZBLOCK 2 |
| 51 | |
| 52 | /LPT HANDLER FOR EITHER LP08 OR LS8E LINE PRINTER. |
| 53 | /HANDLES TABS, PASSES EVERYTHING ELSE ON TO THE HARDWARE. |
| 54 | |
| 55 | LSF=6661 /SKIP ON FLAG |
| 56 | LSR=6663 /SKIP ON ERROR |
| 57 | LLS=6666 /LOAD LPT BUFFER |
| 58 | |
| 59 | DBST= 6570 /SKIP IF DEMAND SET AND CLEAR IT |
| 60 | DBTD= 6574 /LOAD COMPLEMENT OF AC0-11 TO TRANSMIT BUFFER |
| 61 | DBSE= 6575 /SET INTERRUPT ENABLE |
| 62 | DBCE= 6575 /CLEAR INTERRUPT ENABLE |
| 63 | |
| 64 | LA180=0 /SET TO 1 TO USE LA180 |
| 65 | |
| 66 | /V3D CHANGES: |
| 67 | |
| 68 | /ADDED IN LA180 SUPPORT |
| 69 | \f *200 |
| 70 | |
| 71 | LPWDTH, -205 /-(WIDTH+1) [USE -121 FOR 80 COLUMNS] |
| 72 | LTERMC, 14 /4 FOR LV8 |
| 73 | LVCCNV, -40 /0 IF PRINTER PRINTS LC |
| 74 | LP7770, 7770 |
| 75 | LP0007, 0007 |
| 76 | LPT, LPVERSION /NORMAL ENTRY POINT |
| 77 | CLA STL RAR |
| 78 | TAD I LPT / R/W BIT TO LINK L |
| 79 | AND LP7700 / I |
| 80 | CMA /TREAT 0 PG CNT AS 0 WD CNT N |
| 81 | DCA LPTWC /SAVE -(DBLWD COUNT+1) K |
| 82 | LPT214, RDF / |
| 83 | TAD LPTCIF / M |
| 84 | DCA LPTXIT /SAVE CIF CDF RETRN FIELD U |
| 85 | TAD I LPT / S |
| 86 | AND (70 / T |
| 87 | TAD (CDF 0 / |
| 88 | DCA LPTCDF / N |
| 89 | ISZ LPT /PT TO BUFFER O |
| 90 | TAD I LPT /GET BUFFER ADDRESS T |
| 91 | DCA LPTCA /SAVE BUFFER PTR |
| 92 | ISZ LPT /PT TO BLOCK # C |
| 93 | TAD I LPT /GET IT H |
| 94 | ISZ LPT /POINT TO ERROR RETURN G |
| 95 | LPTCDF, HLT / ! |
| 96 | SNL |
| 97 | JMP LPTERR /CAN'T READ FROM LPT |
| 98 | SNA CLA |
| 99 | TAD LPT214 /OUTPUT FORM FEED IF BLOCK 0 |
| 100 | LPTELP, JMS LPTPCH /PRINT 3RD CHAR OF DOUBLEWORD |
| 101 | ISZ LPTWC |
| 102 | JMP LPTLP /GET 3 MORE CHARS |
| 103 | SKP |
| 104 | LPTCTZ, TAD LTERMC |
| 105 | JMS LPTPCH /OUTPUT FORM FEED IF ^Z SEEN (EOT OF LV8) |
| 106 | ISZ LPT /BUMP TO NORMAL RETURN |
| 107 | LPTXIT, HLT /RESTORE FIELDS |
| 108 | JMP I LPT /EXIT |
| 109 | \f/UNPACKING LOOP - USES A SHIFT REGISTER METHOD TO GET THE |
| 110 | /THIRD CHARACTER IN EACH DOUBLEWORD. |
| 111 | |
| 112 | LPTLP, STL /GUARD BIT OF SHIFT REGISTER |
| 113 | LPROTL, RTL |
| 114 | RTL |
| 115 | SPA /DO WE HAVE 8 BITS SHIFTED IN? |
| 116 | JMP LPTELP |
| 117 | DCA LPTCDF /SAVE SHIFT REGISTER |
| 118 | TAD I LPTCA |
| 119 | JMS LPTPCH /PRINT A CHAR |
| 120 | TAD I LPTCA |
| 121 | ISZ LPTCA /BUMP INPUT POINTER |
| 122 | LP7400, 7400 /PROTECT ISZ |
| 123 | AND LP7400 |
| 124 | CLL RAL |
| 125 | TAD LPTCDF /SHIFT HIGH 4 BITS INTO |
| 126 | JMP LPROTL /SHIFT REGISTER |
| 127 | |
| 128 | LPTERR, STL CLA RAR /PUT 4000 IN AC |
| 129 | JMP LPTXIT /AND TAKE ERROR RETURN |
| 130 | |
| 131 | LPTWC, 0 |
| 132 | LPTCA, 0 |
| 133 | \f/CHAR PRINT ROUTINE |
| 134 | |
| 135 | LPTPCH, 0 |
| 136 | AND (177 |
| 137 | TAD (-175 |
| 138 | SMA |
| 139 | JMP LPFLSH /FLUSH CODES 175-177 |
| 140 | TAD (175-140 |
| 141 | SMA |
| 142 | TAD LVCCNV /CONVERT LC TO UC IF DESIRED |
| 143 | TAD (140-33 |
| 144 | SNA |
| 145 | TAD (11 /CHANGE ALTMODE TO $ |
| 146 | IAC |
| 147 | SNA |
| 148 | JMP LPTCTZ /^Z - END OF FILE |
| 149 | TAD (32-11 |
| 150 | SNA |
| 151 | JMP LPTTAB /TABS MUST BE SIMULATED |
| 152 | LPLFHK, TAD (11 /RESTORE CHAR |
| 153 | SZA /FLUSH NULLS |
| 154 | JMS LPCHAR / |
| 155 | TAD LPLPTR /IF COL. CTR GT 0 |
| 156 | SMA /WE HIT A CONTROL CHAR |
| 157 | TAD LPWDTH /OR EOL- SET TO FULL |
| 158 | DCA LPLPTR /WIDTH (NOTE LPLPTR=1 !) |
| 159 | LP7700, |
| 160 | LPFLSH, SMA CLA /NEVER SKIPS |
| 161 | JMP I LPTPCH /RETURN |
| 162 | |
| 163 | LPCHAR, 0 /LOW LEVEL PRINT ROUTINE |
| 164 | IFZERO LA180 < |
| 165 | NOP /NOP'S NEEDED FOR SET |
| 166 | LLS /PUT CHAR IN LPT BUFFER |
| 167 | NOP |
| 168 | > |
| 169 | IFNZRO LA180 < |
| 170 | CMA |
| 171 | DBTD /PUT CHAR IN LP BUFFER |
| 172 | CMA |
| 173 | > |
| 174 | AND LP7770 /KLUDGE - CLEARS COLUMN CTR |
| 175 | TAD LP7770 /ON CR, LF, VT, FF BUT ALSO |
| 176 | SNA CLA /ON ^H,^N, AND ^O. BIG DEAL |
| 177 | DCA LPLPTR /?SR RICHIE SAID 'LPCRFG' |
| 178 | LP7600, 7600 /CLEAR AC |
| 179 | LPCTCL, TAD LP7600 |
| 180 | KRS |
| 181 | TAD (-7603 /CHECK FOR ^C FROM CONSOLE |
| 182 | SNA CLA |
| 183 | KSF /WITH FLAG UP |
| 184 | JMP .+3 |
| 185 | LPTCIF, CDF CIF 0 /YES, RETURN TO OS/8 |
| 186 | JMP I LP7600 |
| 187 | IFNZRO LA180 <DBST> /NO MUST BE HERE |
| 188 | IFZERO LA180 <LSF> /NO FOR SET |
| 189 | JMP LPCTCL /WAIT FOR FLAG |
| 190 | ISZ LPLPTR /CHECK LINE OVERFLOW |
| 191 | JMP I LPCHAR |
| 192 | TAD (15 |
| 193 | JMS LPCHAR |
| 194 | CLA IAC |
| 195 | JMP LPLFHK |
| 196 | \fLPTTAB, TAD LPBLNK /GET PSEUDO BLANK |
| 197 | JMS LPCHAR /PRINT IT |
| 198 | TAD LPWDTH |
| 199 | CMA |
| 200 | TAD LPLPTR /GET # CHARS IN LINE |
| 201 | AND LP0007 |
| 202 | LPBLNK, SZA CLA /LOOP 'TILL MULTIPLE OF 8 |
| 203 | JMP LPTTAB |
| 204 | JMP I LPTPCH |
| 205 | |
| 206 | LPLPTR, 0 |
| 207 | $ |
| 208 | \f |