| 1 | /LP86 HANDLER\r |
| 2 | \r |
| 3 | LPVERSION="A&77\r |
| 4 | \r |
| 5 | *0\r |
| 6 | \r |
| 7 | -1\r |
| 8 | DEVICE LP86;DEVICE LP;1040;LPT&177+4000;ZBLOCK 2\r |
| 9 | \r |
| 10 | /LP HANDLER FOR IBM PC XT/AT V24 AUX LINE.\r |
| 11 | / THE PDP-8 IS CONNECTED TO THE PC VIA V24 LINE.\r |
| 12 | / THIS HANDLER TRANSMITTS ALL DATA VIA THE V24 LINE.\r |
| 13 | / NO ANSWER BACK. THE HANDSHAKE IS DONE WITH CTRL S (XOFF) AND\r |
| 14 | / CTRL Q (XON).\r |
| 15 | / THE PC HAS TO FETCH ALL DATA FROM THE LINE. NO ERROR RETRIES\r |
| 16 | / OR CHECKS ARE MADE.\r |
| 17 | /\r |
| 18 | / REV 0.0 10-MAY-88 H.A.\r |
| 19 | / REV 0.1 11-MAY-88 H.A.\r |
| 20 | / REV 0.2 5-AUG-88 H.A. PHOENIX OUT OF WASTE PAPER\r |
| 21 | \r |
| 22 | / IOTs for communication interface:\r |
| 23 | DEVCOD= 33\r |
| 24 | \r |
| 25 | VRSF= DEVCOD^10+6001\r |
| 26 | VROB= DEVCOD^10+6004\r |
| 27 | VRRB= DEVCOD^10+6006\r |
| 28 | VSF= DEVCOD^10+6011\r |
| 29 | VLS= DEVCOD^10+6016\r |
| 30 | \r |
| 31 | FIXTAB\r |
| 32 | \r |
| 33 | \r |
| 34 | / special characters:\r |
| 35 | XON= 21\r |
| 36 | XOFF= 23\r |
| 37 | CTRLC= 3\r |
| 38 | TAB= 11\r |
| 39 | LF= 12\r |
| 40 | CR= 15\r |
| 41 | CTRLN= 16\r |
| 42 | CTRLZ= 32\r |
| 43 | \r |
| 44 | \r |
| 45 | *200\r |
| 46 | \r |
| 47 | PLINK, 0000\r |
| 48 | CLA STL RAR / handler actually starts here\r |
| 49 | TAD I LPT / R/W BIT TO LINK L\r |
| 50 | AND LP7700 / I\r |
| 51 | CMA /TREAT 0 PG CNT AS 0 WD CNT N\r |
| 52 | DCA LPTWC /SAVE -(DBLWD COUNT+1) K\r |
| 53 | RDF /\r |
| 54 | TAD LPTCIF / M\r |
| 55 | DCA LPTXIT /SAVE CIF CDF RETURN FIELD U\r |
| 56 | TAD I LPT / S\r |
| 57 | AND LPT70 / T\r |
| 58 | TAD LPCDF0 /\r |
| 59 | DCA LPTCDF / N\r |
| 60 | ISZ LPT /POINT TO BUFFER O\r |
| 61 | TAD I LPT /GET BUFFER ADDRESS T\r |
| 62 | DCA LPTCA /SAVE BUFFER PTR\r |
| 63 | ISZ LPT /PT TO BLOCK # C\r |
| 64 | TAD I LPT /GET IT H\r |
| 65 | ISZ LPT /POINT TO ERROR RETURN G\r |
| 66 | LPTCDF, HLT / !\r |
| 67 | SNL\r |
| 68 | JMP LPTERR /CAN'T READ FROM LPT\r |
| 69 | SZA CLA\r |
| 70 | JMP LPT1\r |
| 71 | \r |
| 72 | \r |
| 73 | / Initialization \r |
| 74 | \r |
| 75 | VLS /initialize\r |
| 76 | CLA\r |
| 77 | RDF\r |
| 78 | TAD LPCDF0\r |
| 79 | DCA RESFLD\r |
| 80 | LPCDF0, CDF 0\r |
| 81 | JMP RESFLD / NO INIT SEQUENCE SEND TO HOST\r |
| 82 | "R\r |
| 83 | 40\r |
| 84 | "R\r |
| 85 | "E\r |
| 86 | "C\r |
| 87 | "V\r |
| 88 | "L\r |
| 89 | "P\r |
| 90 | CR\r |
| 91 | 00\r |
| 92 | RESFLD, HLT\r |
| 93 | JMP LPT1\r |
| 94 | \r |
| 95 | \f/UNPACKING LOOP - USES A SHIFT REGISTER METHOD TO GET THE\r |
| 96 | /THIRD CHARACTER IN EACH DOUBLEWORD.\r |
| 97 | \r |
| 98 | LPTLP, STL /GUARD BIT OF SHIFT REGISTER\r |
| 99 | LPROTL, RTL\r |
| 100 | RTL\r |
| 101 | SPA /DO WE HAVE 8 BITS SHIFTED IN?\r |
| 102 | JMP LPTELP\r |
| 103 | DCA LPTCDF /SAVE SHIFT REGISTER\r |
| 104 | TAD I LPTCA\r |
| 105 | JMS I PLINK /PRINT A CHAR\r |
| 106 | SZA\r |
| 107 | JMP ERR\r |
| 108 | TAD I LPTCA\r |
| 109 | ISZ LPTCA /BUMP INPUT POINTER\r |
| 110 | LP7400, 7400 /PROTECT ISZ\r |
| 111 | AND LP7400\r |
| 112 | CLL RAL\r |
| 113 | TAD LPTCDF /SHIFT HIGH 4 BITS INTO\r |
| 114 | JMP LPROTL /SHIFT REGISTER\r |
| 115 | \r |
| 116 | LPTELP, JMS I PLINK /PRINT 3RD CHAR OF DOUBLEWORD\r |
| 117 | SZA\r |
| 118 | JMP ERR\r |
| 119 | LPT1, ISZ LPTWC\r |
| 120 | JMP LPTLP /GET 3 MORE CHARS\r |
| 121 | LPTCTZ, ISZ LPT /BUMP TO NORMAL RETURN\r |
| 122 | LPTXIT, HLT /RESTORE FIELDS\r |
| 123 | JMP I LPT /EXIT\r |
| 124 | \r |
| 125 | LPTERR, STL CLA RAR /PUT 4000 IN AC\r |
| 126 | JMP LPTXIT /AND TAKE ERROR RETURN\r |
| 127 | \r |
| 128 | LPTWC, 0\r |
| 129 | LPTCA, 0\r |
| 130 | \r |
| 131 | \r |
| 132 | TRATXT, 0\r |
| 133 | TAD I TRATXT /get character\r |
| 134 | ISZ TRATXT /point to next\r |
| 135 | SNA /character zero?\r |
| 136 | JMP I TRATXT /yes - return\r |
| 137 | JMS I PLINK /no - transfer it\r |
| 138 | SNA\r |
| 139 | JMP TRATXT+1\r |
| 140 | \r |
| 141 | \r |
| 142 | ERR, CLA CLL SNL\r |
| 143 | JMP LPTCTZ\r |
| 144 | TAD PLINK\r |
| 145 | TAD OFFSET\r |
| 146 | DCA PLINK\r |
| 147 | CLA IAC STL RAL /AC=CTRL/C\r |
| 148 | JMS I PLINK / send CTRL/C to abort job on '11\r |
| 149 | LP7700, CLA SMA /never skips\r |
| 150 | JMP LPTERR\r |
| 151 | \r |
| 152 | \r |
| 153 | LPT70, 70\r |
| 154 | LPTCIF, CDF CIF 0\r |
| 155 | OFFSET, VTYPE-LPTPCH\r |
| 156 | \r |
| 157 | *376\r |
| 158 | LPT, LPVERSION /NORMAL ENTRY POINT\r |
| 159 | JMS PLINK\r |
| 160 | IFNZRO LPT-376 <ENTERR.QQQQ>\r |
| 161 | PAGE\r |
| 162 | \f\r |
| 163 | /OUTPUT ANY CHARACTER ONTO THE OUTPUT LINE (8 DATA BITS)\r |
| 164 | /CTRL Z IS TREATED AS END OF INPUT FILE.\r |
| 165 | \r |
| 166 | LPTPCH, 0\r |
| 167 | DCA CHAR /save it\r |
| 168 | TAD CHAR\r |
| 169 | TAD (-CTRLZ\r |
| 170 | SNA\r |
| 171 | JMP EOF\r |
| 172 | JMS VREAD / CHECK XON/ XOFF\r |
| 173 | CLA\r |
| 174 | TAD CHAR\r |
| 175 | JMS VTYPE /transfer it\r |
| 176 | CLA\r |
| 177 | JMP I LPTPCH\r |
| 178 | \r |
| 179 | \r |
| 180 | EOF, TAD (CTRLZ\r |
| 181 | JMS VTYPE\r |
| 182 | CLA IAC CLL\r |
| 183 | JMP I LPTPCH\r |
| 184 | LPERR, IAC STL\r |
| 185 | JMP I LPTPCH\r |
| 186 | \r |
| 187 | \r |
| 188 | \r |
| 189 | COUNT2, -113\r |
| 190 | CHAR, 0\r |
| 191 | \r |
| 192 | \r |
| 193 | /THIS ROUTINE CHECKS THE SERIELL INPUT LINE FOR XON/ XOFF\r |
| 194 | / IT 8 IS STRIPPED OFF. IT ALSO CHECKS FOR CTRL C FROM\r |
| 195 | /the terminal.\r |
| 196 | \r |
| 197 | VREAD, 0000\r |
| 198 | CLA\r |
| 199 | VRSF\r |
| 200 | JMP I VREAD /NO INPUT, RETURN\r |
| 201 | CLA\r |
| 202 | VRRB /INPUT BYTE --> AC\r |
| 203 | AND (177\r |
| 204 | TAD (-XOFF /IS IT XOFF CHAR?\r |
| 205 | SZA CLA\r |
| 206 | JMP I VREAD /NO XOFF, RETURN\r |
| 207 | VR1, JMS CINTER /TEST FOR TERMINAL INTERRUPT\r |
| 208 | CLA\r |
| 209 | VROB /INPUT --> AC\r |
| 210 | AND (177 /STRIP OFF PARITY BIT\r |
| 211 | TAD (-XON /TEST FOR XON CHARACTER\r |
| 212 | SZA CLA\r |
| 213 | JMP VR1 /NO XON, WAIT\r |
| 214 | JMP I VREAD /XON, RETURN\r |
| 215 | \r |
| 216 | VTYPE, 0000\r |
| 217 | VWTF, JMS CINTER /abort if CTRL/C typed\r |
| 218 | VSF\r |
| 219 | JMP VWTF\r |
| 220 | VLS\r |
| 221 | CLA\r |
| 222 | JMP I VTYPE /return\r |
| 223 | \r |
| 224 | CINTER, 0000\r |
| 225 | KSF /is there a character?\r |
| 226 | JMP I CINTER /no - return\r |
| 227 | DCA AC /yes - save Accu\r |
| 228 | KRB /read character\r |
| 229 | AND (177 /no parity\r |
| 230 | TAD (-CTRLC /is it CTRL/C?\r |
| 231 | SZA CLA /skip if it is\r |
| 232 | JMP NOCC /no - return\r |
| 233 | CLA /SEND CTRL Z\r |
| 234 | TAD (CTRLZ /TO LINE\r |
| 235 | JMS VTYPE /TO HOST - THIS ABORTS HOST JOB\r |
| 236 | CDF CIF 0 /exit\r |
| 237 | JMP I (7600 / to OS/8\r |
| 238 | \r |
| 239 | NOCC, TAD AC /restore Accu\r |
| 240 | JMP I CINTER /return\r |
| 241 | \r |
| 242 | AC, 0\r |
| 243 | \r |
| 244 | \r |
| 245 | $\r |
| 246 | \f\1a\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 |