| 1 | / TD8E Dectape DUMP Program |
| 2 | / This program will send a Dectape image out the console port. |
| 3 | / The format of the data sent is 0xff (0377) or 0xfd if read error |
| 4 | / followed by 128 word of data for each block. |
| 5 | / After the last block a 0xfe (0376) is sent |
| 6 | / with a two byte checksum, low 8 bits first then upper 4. |
| 7 | / The words in a block are sent as three bytes for each 2 words. |
| 8 | / 1 = low 8 bits first word |
| 9 | / 2 = upper 4 bits first and lower 4 bits second |
| 10 | / 3 = upper 8 bits second word |
| 11 | / |
| 12 | / The program (PC) receiving the data should be started before this program |
| 13 | / |
| 14 | / To run start at 0200. |
| 15 | / SR 11 should be drive, only 0 and 1 supported without reassembling |
| 16 | / SR 6-8 should be maximum memory field in computer, needs 8k minimum |
| 17 | / The receiving program should be running first. |
| 18 | / At normal exit hitting cont will restart the program |
| 19 | / |
| 20 | / Should halt at label finish (140) with number of recoverable errors in AC |
| 21 | / The current block being read will be displayed in the AC |
| 22 | / while running. |
| 23 | / |
| 24 | / If a unrecoverable error occurs the program will halt with the error in |
| 25 | / the AC. Hit continue to dump more or comment out hlt, search for *****. |
| 26 | / The PC program will print out the bad location if an error occurs |
| 27 | / |
| 28 | / We will retry each read up to 16 times on error |
| 29 | / |
| 30 | / This transfers the standard 129 word by 1474 blocks used by OS/8 etc. |
| 31 | / Other formats can be handled by changing constants below |
| 32 | |
| 33 | INAD=400 / Address of serial input, 30 for console |
| 34 | KCF2=6000 INAD |
| 35 | KSF2=6001 INAD |
| 36 | KCC2=6002 INAD |
| 37 | KRS2=6004 INAD |
| 38 | KIE2=6005 INAD |
| 39 | KRB2=6006 INAD |
| 40 | |
| 41 | OUTAD=410 / Address of serial output, 40 for console |
| 42 | TFL2=6000 OUTAD |
| 43 | TSF2=6001 OUTAD |
| 44 | TCF2=6002 OUTAD |
| 45 | TPC2=6004 OUTAD |
| 46 | TSK2=6005 OUTAD |
| 47 | TLS2=6006 OUTAD |
| 48 | |
| 49 | /2 TD8E INITIALIZER PROGRAM, V7A |
| 50 | / |
| 51 | /COPYRIGHT (C) 1975, 1977 |
| 52 | /DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS. |
| 53 | / |
| 54 | / |
| 55 | / |
| 56 | /THIS SOFTWARE IS FURNISHED UNDER A LICENSE FOR USE ONLY ON A |
| 57 | /SINGLE COMPUTER SYSTEM AND MAY BE COPIED ONLY WITH THE INCLU- |
| 58 | /SION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE, OR ANT OTHER |
| 59 | /COPIES THEREOF, MAY NOT BR PROVIDED OR OTHERWISE MADE AVAILABLE |
| 60 | /TO ANY OTHER PERSON EXCEPT FOR USE ON SUCH SYSTEM AND TO ONE WHO |
| 61 | /AGREES TO THESE LICENSE TERMS. TITLE TO AND OWNERSHIP OF THE |
| 62 | /SOFTWARE SHALL AT ALL TIMES REMAIN IN DEC. |
| 63 | / |
| 64 | / |
| 65 | /THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT |
| 66 | /NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL |
| 67 | /EQUIPMRNT COROPATION. |
| 68 | / |
| 69 | /DEC ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS |
| 70 | /SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DEC. |
| 71 | / |
| 72 | / |
| 73 | / |
| 74 | / |
| 75 | / |
| 76 | / |
| 77 | \f |
| 78 | /DECEMBER 21, 1973 GB/RL/EF/SR |
| 79 | |
| 80 | /ABSTRACT-- |
| 81 | / THE ROUTINE DESCRIBED AND LISTED HERE IS A GENERAL |
| 82 | /DATA HANDLER FOR THE TD8E DECTAPE SYSTEM. THE ROUTINE |
| 83 | /CONTAINS SEARCH, READ, AND WRITE FUNCTIONS IN A FORMAT |
| 84 | /WHICH IS COMPATIBLE WITH OS/8 DEVICE HANDLER CALLING |
| 85 | /SEQUENCES. |
| 86 | |
| 87 | /FIXES SINCE FIELD-TEST RELEASE: |
| 88 | |
| 89 | /1. FIXED BUG RE CLA ON RETRY AFTER ERROR |
| 90 | /2. ALLOWED FINAL BOOTSTRAP TO BE INTO A WRITE-LOCKED DEVICE |
| 91 | |
| 92 | /OS/8 V3D CHANGES: |
| 93 | |
| 94 | /3. FIXED BUG RE TD8E BUILD (V6B PATCH) |
| 95 | \f |
| 96 | /THIS ROUTINE CAN BE RE-EDITED AND ASSEMBLED TO PRODUCE |
| 97 | /VARIATIONS ON THE BASIC TD8E SYSTEM. ASSEMBLY PARAMETERS |
| 98 | /CONTROL: |
| 99 | /A) WHAT DRIVES (UNITS 0-7) WILL BE USED |
| 100 | /B) THE ORIGIN OF THE TWO PAGE ROUTINE |
| 101 | /C) WHAT MEMORY FIELD THE ROUTINE WILL RUN IN |
| 102 | /D) THE SIZE OF THE DECTAPE BLOCK TO BE READ/WRITTEN |
| 103 | |
| 104 | /FOLLOWING ARE THE PARAMETERS SET UP FOR THE STANDARD |
| 105 | /DEC VERSION OF THIS ROUTINE: |
| 106 | |
| 107 | DRIVE=10 /UNITS 0 AND 1 SELECTED |
| 108 | ORIGIN=600 /ENTER AT ORIGIN, ORIGIN+4 |
| 109 | AFIELD=0 /INITIAL FIELD SETTING |
| 110 | MFIELD=00 /AFIELD*10=MFIELD |
| 111 | WDSBLK=201 /129 WORDS PER BLOCK |
| 112 | |
| 113 | /THE USE OF THE PARAMETERS IS AS FOLLOWS: |
| 114 | |
| 115 | / DRIVE: DRIVE DETERMINES WHICH UNITS WILL BE SELECTED |
| 116 | / DRIVE=10 IMPLIES UNITS 0 &1 |
| 117 | / DRIVE=20 IMPLIES UNITS 2&3 |
| 118 | / DRIVE=30 IMPLIES UNITS 4&5 |
| 119 | / DRIVE=40 IMPLIES UNITS 6&7 |
| 120 | |
| 121 | /ORIGIN: ALTERING ORIGIN CAUSES ASSEMBLY IN A DIFFERENT |
| 122 | / MEMORY LOCATION. WHEN CHANGING ORIGIN KEEP IN MIND |
| 123 | /THAT THIS IS A TWO PAGE ROUTINE. |
| 124 | |
| 125 | /AFIELD: AFIELD DETERMINES THE INITIAL FIELD SETTING FOR THE |
| 126 | / LOADER. PERMISSIBLE VALUES FOR AFIELD ARE 0 TO 7. |
| 127 | |
| 128 | /MFIELD: MFIELD IS USED IN A CIF CDF MFIELD INSTRUCTION. |
| 129 | / THE VALUE INSERTED FOR MFIELD SHOULD BE 10(8) TIMES |
| 130 | / THE VALUE FOR AFIELD. THE PERMISSIBLE VALUES ARE 00-70. |
| 131 | |
| 132 | /WDSBLK: WDSBLK GOVERNS HOW MANY WORDS THE ROUTINE THINKS ARE |
| 133 | / IN A DECTAPE BLOCK. THE STANDARD VALUE IS 201(8) OR |
| 134 | / 128 DECIMAL. NOTE THAT THE FUNCTION WORD BIT 10 CAN |
| 135 | / 129 DECIMAL ??? (DJG) |
| 136 | / BE USED TO SUBTRACT ONE FROM WDSBLK. THE VALUE USED |
| 137 | / FOR WDSBLK SHOULD BE THE NUMBER OF WORDS THE TAPE WAS |
| 138 | / FORMATTED TO CONTAIN. |
| 139 | |
| 140 | /IF WE WANT A HANDLER FOR UNITS 2&3 TO RESIDE IN |
| 141 | /FIELD 2 AT LOCATION 3000 AND READ/WRITE 256(10) WORDS |
| 142 | /PER BLOCK, THE PARAMETERS WOULD BE: |
| 143 | / DRIVE=20 |
| 144 | / ORIGIN=3000 |
| 145 | / AFIELD=2 |
| 146 | / MFIELD=20 |
| 147 | / WDSBLK=400 |
| 148 | \f/THE CALL TO THE SUBROUTINE FOLLOWS BASICALLY THE |
| 149 | /CALLING SEQUENCE FOR OS/8 DEVICE HANDLERS. |
| 150 | /THE CALLING SEQUENCE IS: |
| 151 | |
| 152 | / CDF CURRENT |
| 153 | / CIF MFIELD /MFIELD=FIELD ASSEMBLED IN |
| 154 | / JMS ENTRY /ENTRY=ORIGIN (EVEN NUMBERED DRIVE |
| 155 | /AND ORIGIN+4 FOR ODD NUMBERED DRIVE. |
| 156 | / ARG1 |
| 157 | / ARG1B (DJG) |
| 158 | / ARG2 |
| 159 | / ARG3 |
| 160 | / ERROR RETURN |
| 161 | / NORMAL RETURN |
| 162 | |
| 163 | /THE ARGUMENTS ARE: |
| 164 | |
| 165 | /ARG1: FUNCTION WORD BIT0: 0=READ, 1=WRITE |
| 166 | / BITS 1-5: UNUSED, WAS # BLOCKS IN OPERATION (DJG) |
| 167 | / BITS 6-8: FIELD OF BUFFER AREA |
| 168 | / BIT 9: UNUSED |
| 169 | / BIT 10: # OF WORDS/BLOCK. |
| 170 | / 0= WDSBLK, 1=WDSBLK-1 |
| 171 | / BIT 11: 1=START FORWARD, 0=REVERSE |
| 172 | /ARG1A: # OF BLOCKS IN OPERATIONA (DJG) |
| 173 | /ARG2: BUFFER ADDRESS FOR OPERATION |
| 174 | /ARG3: STARTING BLOCK FOR OPERATION |
| 175 | |
| 176 | /ERRORS: THE HANDLER DETECTS TWO TYPES OF ERRORS: |
| 177 | /A) FATAL ERRORS- PARITY ERROR, TIMING ERROR, |
| 178 | / TOO GREAT A BLOCK NUMBER |
| 179 | / FATAL ERRORS TAKE ERROR RETURN WITH THE |
| 180 | / AC=4000. |
| 181 | /B) NON-FATAL- SELECT ERROR. |
| 182 | / IF NO PROPER UNIT IS SELECTED, THE ERROR |
| 183 | / RETURN IS TAKEN WITH CLEAR AC. |
| 184 | /FATAL ERRORS TRY THREE TIMES BEFORE TAKING ERROR RETURN. |
| 185 | /THE NORMAL RETURN IS TAKEN AFTER ALL INDICATED |
| 186 | /BLOCKS HAVE BEEN TRANSFERRED. THE AC IS CLEAR. |
| 187 | |
| 188 | /THE TD8E IOT'S ARE: |
| 189 | SDSS=7001-DRIVE /SKIP ON SINGLE LINE FLAG |
| 190 | SDST=7002-DRIVE /SKIP ON TIMING ERROR |
| 191 | SDSQ=7003-DRIVE /SKIP ON QUAD LINE FLAG |
| 192 | SDLC=7004-DRIVE /LOAD COMMAND REGISTER |
| 193 | SDLD=7005-DRIVE /LOAD DATA REGISTER |
| 194 | SDRC=7006-DRIVE /READ COMMAND REGISTER |
| 195 | SDRD=7007-DRIVE /READ DATA REGISTER |
| 196 | |
| 197 | /THE IOT'S IN GENERAL ARE 677X,676X,675X,AND 674X. |
| 198 | /THE OTHERS CONTROL UNITS 2-7. |
| 199 | |
| 200 | / THIS HANDLER USES DECTAPE BLOCKS NOT OS/8 BLOCKS ! |
| 201 | |
| 202 | *ORIGIN |
| 203 | |
| 204 | / MODIFIED SO BIT 0 ON ENTRY IS UNIT 1 |
| 205 | DTA0, 0 |
| 206 | DCA UNIT /SAVE UNIT POSITION |
| 207 | RDF |
| 208 | TAD C6203 /GET DATA FIELD AND SETUP RETURN |
| 209 | DCA LEAVE |
| 210 | TAD I DTA0 /GET FUNCTION WORD |
| 211 | SDLD /PUT FUNCTION INTO DATA REGISTER |
| 212 | CLL RTR /AC STILL HAS FUNCTION. PUT # WORDS PER |
| 213 | /BLOCK INTO LINK |
| 214 | SZL CLA /KNOCK ONE OFF WDSBLK? |
| 215 | IAC /YES |
| 216 | TAD MWORDS |
| 217 | DCA WCOUNT /STORE MASTER WORD COUNT |
| 218 | ISZ DTA0 /TO BLOCK COUNT (DJG) |
| 219 | TAD I DTA0 / (DJG) |
| 220 | CIA / (DJG) |
| 221 | DCA PGCT / (DJG) |
| 222 | ISZ DTA0 /TO BUFFER |
| 223 | TAD I DTA0 |
| 224 | DCA XBUFF /SAVE ADDRESS (DJG) |
| 225 | / DCA BUFF |
| 226 | ISZ DTA0 /TO BLOCK NUMBER |
| 227 | TAD I DTA0 |
| 228 | DCA BLOCK |
| 229 | ISZ DTA0 /POINT TO ERROR EXIT |
| 230 | CIF CDF MFIELD /TO ROUTINES DATA FIELD |
| 231 | / SDRD /GET FUNCTION INTO AC |
| 232 | / CLL RAL |
| 233 | / AND CM200 /GET # PAGES TO XFER |
| 234 | / DCA PGCT |
| 235 | SDRD |
| 236 | AND C70 /GET FIELD FOR XFER |
| 237 | TAD C6201 /FORM CDF N |
| 238 | DCA XFIELD /IF=0 AND DF=N AT XFER. |
| 239 | TAD UNIT /TEST FOR SELECT ERROR |
| 240 | SDLC |
| 241 | CLA / Moved here because my drive 1 is slow selecting |
| 242 | TAD RETRY |
| 243 | DCA TRYCNT /3 ERROR TRIES |
| 244 | SDRC |
| 245 | AND C100 |
| 246 | SZA CLA |
| 247 | JMP FATAL-1 |
| 248 | SDRD /PUT FUNCT INTO XFUNCT IN SECOND PG. |
| 249 | DCA I CXFUN |
| 250 | TAD WCOUNT |
| 251 | DCA I CXWCT |
| 252 | SDRD /GET MOTION BIT TO LINK |
| 253 | CLL RAR |
| 254 | XFIELD, HLT /INTO NEXT PAGE |
| 255 | JMP GO /AND START THE MOTION. |
| 256 | RWCOM, SDST /ANY CHECKSUM ERRORS? |
| 257 | SZA CLA /OR CHECKSUM ERRORS? |
| 258 | JMP TRY3 /PLEASE NOTE THAT THE LINK IS ALWAYS |
| 259 | /SET AT RWCOM. GETCHK SETS IT. |
| 260 | / TAD PGCT /NO ERROR..FINISHED XFER? |
| 261 | / TAD CM200 |
| 262 | / SNA |
| 263 | ISZ PGCT / (DJG) |
| 264 | SKP / (DJG) |
| 265 | JMP EXIT /ALL DONE. GET OUT |
| 266 | / DCA PGCT /NEW PAGE COUNT |
| 267 | ISZ BLOCK /NEXT BLOCK TO XFER |
| 268 | / TAD WCOUNT /FORM NEXT BUFFER ADDRESS |
| 269 | / CIA |
| 270 | / TAD BUFF |
| 271 | / DCA XBUFF /SAVE ADDRESS (DJG) |
| 272 | / DCA BUFF / (DJG) |
| 273 | CLL CML /FORCES MOTION FORWARD |
| 274 | GO, CLA CML RTR /LINK BECOMES MOTION BIT |
| 275 | TAD C1000 |
| 276 | TAD UNIT /PUT IN 'GO' AND UNIT # |
| 277 | SDLC /LOOK FOR BLOCK NO. |
| 278 | CLA |
| 279 | TAD XBUFF |
| 280 | DCA OLDBUF |
| 281 | RDF |
| 282 | TAD C6201 |
| 283 | DCA OLDFLD |
| 284 | JMS I CRDQUD /WAIT AT LEAST 6 LINES TO LOOK |
| 285 | JMS I CRDQUD |
| 286 | CM200, 7600 /COULD HAVE SAVED A LOC. HERE |
| 287 | SRCH, SDSS |
| 288 | JMP .-1 /WAIT FOR SINGLE LINE FLAG |
| 289 | SDRC |
| 290 | CLL RTL /DIRECTION TO LINK. INFO BITS |
| 291 | /ARE SHIFTED. |
| 292 | AND C374 /ISOLATE MARK TRACK BITS |
| 293 | TAD M110 /IS IT END ZONE? |
| 294 | SNA /THE LINK STAYS SAME THRU THIS |
| 295 | JMP ENDZ |
| 296 | TAD M20 /CHECK FOR BLOCK MARK |
| 297 | SZA CLA |
| 298 | JMP SRCH |
| 299 | SDRD /GET THE BLOCK NUMBER |
| 300 | SZL /IF WE ARE IN REVERSE, LOOK FOR 3 |
| 301 | /BLOCKS BEFORE TARGET BLOCK. THIS |
| 302 | /ALLOWS TURNAROUND AND UP TO SPEED. |
| 303 | TAD C3 /REVERSE |
| 304 | CMA |
| 305 | TAD BLOCK |
| 306 | CMA /IS IT RIGHT BLOCK? |
| 307 | SNA |
| 308 | JMP FOUND /YES..HOORAY! |
| 309 | M110, SZL SNA CLA /NO, BUT ARE WE HEADED FOR IT? |
| 310 | /ABOVE SNA IS SUPERFLUOUS. |
| 311 | JMP SRCH /YES |
| 312 | ENDZ, SDRC /WE ARE IN THE END ZONE |
| 313 | CLL RTL /DIRECTION TO LINK |
| 314 | CLA /ARE WE IN REVERSE? |
| 315 | JMP GO /YES..TURN US AROUND |
| 316 | /IF WE ARE IN THE END ZONE GOING FORWARD, IT IS AN ERROR |
| 317 | TRY3, CLA |
| 318 | OLDFLD, NOP |
| 319 | TAD OLDBUF |
| 320 | DCA XBUFF |
| 321 | ISZ TRYCNT |
| 322 | JMP GO /TRY 3 TIMES |
| 323 | JMP FATAL /LINK OFF MEANS AC=4000 ON RETURN |
| 324 | EXIT, ISZ DTA0 |
| 325 | CLL CML /AC=0 ON NORMAL RETURN |
| 326 | FATAL, TAD UNIT |
| 327 | SDLC /STOP THE UNIT |
| 328 | CLA CML RAR |
| 329 | LEAVE, HLT |
| 330 | JMP I DTA0 |
| 331 | |
| 332 | \f |
| 333 | C6203, 6203 |
| 334 | C6201, 6201 |
| 335 | CRDQUD, RDQUAD |
| 336 | /WCOUNT, 0 (MOVED PAGE 0 DJG) |
| 337 | BUFF, 0 |
| 338 | /MWORDS, -WDSBLK (MOVED PAGE 0 DJG) |
| 339 | UNIT, 0 |
| 340 | CXFUN, XFUNCT |
| 341 | M20, -20 |
| 342 | PGCT, 0 |
| 343 | CXWCT, XWCT |
| 344 | C100, 100 |
| 345 | TRYCNT, -3 |
| 346 | C1000, 1000 |
| 347 | |
| 348 | |
| 349 | *ORIGIN+172 |
| 350 | FOUND, SZL CLA /RIGHT BLOCK. HOW ABOUT DIRECTION? |
| 351 | JMP GO /WRONG..TURN AROUND |
| 352 | TAD UNIT /PUT UNIT INTO LINK |
| 353 | CLL RAL /AC IS NOW 0 |
| 354 | C70, 70 /********DON'T MOVE THIS!!!!****** |
| 355 | C3, 3 |
| 356 | / TAD BUFF /GET BUFFER ADDRESS (DJG) |
| 357 | /XFIELD, HLT /INTO NEXT PAGE |
| 358 | \f *ORIGIN+200 |
| 359 | CIF MFIELD |
| 360 | / DCA XBUFF /SAVE ADDRESS (DJG) |
| 361 | RAR /NOW GET UNIT # |
| 362 | DCA XUNIT |
| 363 | SDRC |
| 364 | SDLC |
| 365 | REVGRD, SDSS |
| 366 | JMP .-1 /LOOK FOR REVERSE GUARD |
| 367 | SDRC |
| 368 | AND K77 |
| 369 | TAD CM32 /IS IT REVERSE GUARD? |
| 370 | SZA CLA |
| 371 | JMP REVGRD /NO.KEEP LOOKING |
| 372 | TAD XWCT |
| 373 | DCA WORDS /WORD COUNTER |
| 374 | TAD XFUNCT /GET FUNCTION READ OR WRITE |
| 375 | K7700, SMA CLA |
| 376 | JMP READ /NEG. IS WRITE |
| 377 | WRITE, SDRC |
| 378 | AND C300 /CHECK FOR WRITE LOCK AND SELECT ERROR |
| 379 | CLL CML /LOCK OUT AND SELECT ARE AC 0 ERRORS |
| 380 | SZA CLA |
| 381 | JMP I CFATAL /FATAL ERROR. LINK MUST BE ON |
| 382 | JMS RDQUAD /NO ONE EVER USES THIS WORD! |
| 383 | C7600, 7600 |
| 384 | TAD C1400 |
| 385 | TAD XUNIT /INITIATE WRITE MODE |
| 386 | SDLC |
| 387 | CLA CMA |
| 388 | JMS WRQUAD /PUT 77 IN REVERSE CHECKSUM |
| 389 | CLA CMA |
| 390 | DCA CHKSUM |
| 391 | WRLP, TAD I XBUFF /GLORY BE! THE ACTUAL WRITE! |
| 392 | JMS WRQUAD |
| 393 | ISZ XBUFF /BUMP CORE POINTER |
| 394 | JMP STFLD1+1 /NOT AT END OF FIELD (DJG) |
| 395 | RDF |
| 396 | TAD (6211 |
| 397 | DCA STFLD1 |
| 398 | STFLD1, NOP |
| 399 | ISZ WORDS /DONE THIS BLOCK? |
| 400 | JMP WRLP /NOT YET..LOOP A WHILE |
| 401 | TAD XFUNCT /IS THE OPERATION FOR WDSBLK PER BLOCK? |
| 402 | CLL RTR /IF NO, WRITE A 0 WORD |
| 403 | SZL CLA |
| 404 | JMS WRQUAD /WRITE A WORD OF 0 |
| 405 | JMS GETCHK /DO THE CHECK SUM |
| 406 | JMS WRQUAD /WRITE FORWARD CHECKSUM |
| 407 | JMS WRQUAD /ALLOW CHECKSUM TO BE WRITTEN |
| 408 | JMP I CRWCOM |
| 409 | K77, 77 /ABOVE MAY SKIP (NOT ANYMORE DJG) |
| 410 | \fREAD, JMS RDQUAD |
| 411 | JMS RDQUAD |
| 412 | JMS RDQUAD /SKIP CONTROL WORDS |
| 413 | AND K77 |
| 414 | TAD K7700 /TACK 7700 ONTO CHECKSUM. |
| 415 | DCA CHKSUM /CHECKSUM ONLY LOW 6 BITS ANYWAY |
| 416 | RDLP, JMS RDQUAD |
| 417 | JMS EQUFUN /COMPUT CHECKSUM AS WE GO |
| 418 | DCA I XBUFF /IT GETS CONDENSED LATER |
| 419 | ISZ XBUFF /AT END OF FIELD? |
| 420 | JMP STFLD2+1 /NOT AT END OF FIELD (DJG) |
| 421 | RDF |
| 422 | TAD (6211 |
| 423 | DCA STFLD2 |
| 424 | STFLD2, NOP |
| 425 | ISZ WORDS /DONE THIS OP? |
| 426 | JMP RDLP /NO SUCH LUCK |
| 427 | TAD XFUNCT /IF OP WAS FOR WDSBLK-1, READ AND |
| 428 | CLL RTR /CHECKSUM THE LAST TAPE WORD |
| 429 | SNL CLA |
| 430 | JMP RDLP2 |
| 431 | JMS RDQUAD /NOT NEEDED FOR WDSBLK/BLOCK |
| 432 | JMS EQUFUN /CHECKSUM IT |
| 433 | RDLP2, JMS RDQUAD /READ CHECKSUM |
| 434 | AND K7700 |
| 435 | JMS EQUFUN |
| 436 | JMS GETCHK /GET SIX BIT CHECKSUM |
| 437 | JMP I CRWCOM |
| 438 | C300, 300 /PROTECTION (NOT ANYMORE DJG) |
| 439 | |
| 440 | WRQUAD, 0 /WRITE OUT A 12 BIT WORD |
| 441 | JMS EQUFUN /ADD THIS TO CHECKSUM |
| 442 | SDSQ /SKIP ON QUADLINE FLAG |
| 443 | JMP .-1 |
| 444 | SDLD /LOAD DATA ONTO BUS |
| 445 | CLA /SDLD DOESN'T CLEAR AC |
| 446 | JMP I WRQUAD |
| 447 | |
| 448 | RDQUAD, 0 /READ A 12 BIT WORD |
| 449 | SDSQ |
| 450 | JMP .-1 |
| 451 | SDRD /READ DATA |
| 452 | JMP I RDQUAD |
| 453 | |
| 454 | \fXUNIT, |
| 455 | EQUFUN, 0 /COMPUTE EQUIVALENCE CHECKSUM |
| 456 | CMA |
| 457 | DCA EQUTMP /ACTUALLY CHECKSUMS ON DECTAPE ARE |
| 458 | TAD EQUTMP /EQUIVALENCE OF ALL WORDS IN A RECORD |
| 459 | AND CHKSUM /SIX BITS AT A TIME. BUT SINCE EQUIVALENCE |
| 460 | CIA /IS ASSOCIATIVE, WE CAN DO IT 12 |
| 461 | CLL RAL /BITS AT A TIME AND CONDENSE LATER. |
| 462 | TAD EQUTMP /THIS ROUTINE USES THESE IDENTITIES: |
| 463 | TAD CHKSUM /A+B=(A.XOR.B)+2*(A.AND.B) |
| 464 | DCA CHKSUM /A.EQU.B=.NOT.(A.XOR.B)=A.XOR.(.NOT.B) |
| 465 | TAD EQUTMP /A.EQU.B=(A+(.NOT.B))-2*(A.AND.(.NOT.B)) |
| 466 | CMA |
| 467 | JMP I EQUFUN |
| 468 | |
| 469 | GETCHK, 0 /FORM 6 BIT CHECKSUM |
| 470 | CLA |
| 471 | TAD CHKSUM |
| 472 | CMA |
| 473 | CLL RTL |
| 474 | RTL |
| 475 | RTL |
| 476 | JMS EQUFUN |
| 477 | CLA CLL CML /FORCES LINK ON AT RWCOM |
| 478 | TAD CHKSUM |
| 479 | AND K7700 |
| 480 | JMP I GETCHK |
| 481 | |
| 482 | CFATAL, FATAL |
| 483 | CRWCOM, RWCOM |
| 484 | XFUNCT, 0 |
| 485 | CM32, -32 |
| 486 | C1400, 1400 |
| 487 | CHKSUM, 0 |
| 488 | WORDS, 0 |
| 489 | XWCT, 0 |
| 490 | EQUTMP, 0 |
| 491 | |
| 492 | *20 |
| 493 | RETRY, 7774 / RETRY UP TO 4 TIME |
| 494 | NUMBLK, 2702 / NUMBER OF BLOCKS |
| 495 | MWORDS, -WDSBLK / WORDS PER BLOCK |
| 496 | WCOUNT, 0 |
| 497 | BLKFLD, 37 / 31 129 word blocks per field |
| 498 | / WRAPPING PAST END OF LAST FIELD DOESN'T WORK |
| 499 | FIELDS, 0 |
| 500 | RDSIZE, 0 / NUMBER BLOCKS PER READ |
| 501 | CBLOCK, 0 / CURRENT BLOCK TO XFER |
| 502 | CLKSUM, 0 |
| 503 | DRVSEL, 0 |
| 504 | READST, 377 |
| 505 | LOC, 0 |
| 506 | LEN, 0 |
| 507 | BCNT, 0 / BLOCKS TO SEND TO PC |
| 508 | TEMP, 0 |
| 509 | C17, 17 |
| 510 | C360, 360 |
| 511 | CHKSM, 0 |
| 512 | ERRCN2, 0 |
| 513 | OLDBUF, 0 / USED BY DTA0 ROUTINE |
| 514 | XBUFF, 0 / USED BY DTA0 ROUTINE |
| 515 | C374, 374 / USED BY DTA0 ROUTINE |
| 516 | BLOCK, 0 / USED BY DTA0 ROUTINE |
| 517 | |
| 518 | *140 |
| 519 | FINISH, |
| 520 | CLA |
| 521 | TAD BO1 |
| 522 | DCA 30 |
| 523 | TAD BO2 |
| 524 | DCA 31 |
| 525 | CAF |
| 526 | JMP 30 |
| 527 | |
| 528 | / HLT / Normal good halt |
| 529 | / JMP START / And restart if requested |
| 530 | |
| 531 | / REBOOT FROM RK05 |
| 532 | BO1, 6743 |
| 533 | BO2, JMP 31 |
| 534 | |
| 535 | *200 |
| 536 | START, CDF 0 |
| 537 | CAF |
| 538 | CLA CLL / OSR / Get drive |
| 539 | AND (1 |
| 540 | RTR |
| 541 | DCA DRVSEL |
| 542 | CLA CLL / OSR / Get max field |
| 543 | / RTR |
| 544 | / RAR |
| 545 | / AND (7 |
| 546 | TAD (1 /PHPH |
| 547 | SNA |
| 548 | HLT / Must have at least 1 field for buffer |
| 549 | CIA |
| 550 | DCA FIELDS |
| 551 | DCA ERRCN2 |
| 552 | RDSZLP, TAD BLKFLD / Multiply by number of fields available |
| 553 | ISZ FIELDS |
| 554 | JMP RDSZLP |
| 555 | DCA RDSIZE / NUMBER BLOCK PER READ |
| 556 | DCA CBLOCK |
| 557 | DCA CHKSM |
| 558 | |
| 559 | DUMPLP, CLA |
| 560 | TAD RDSIZE |
| 561 | TAD CBLOCK |
| 562 | CIA |
| 563 | TAD NUMBLK / MORE BLOCKS LEFT THAN READSIZE? |
| 564 | SMA / NO, READ NUMBER LEFT |
| 565 | CLA / YES, ONLY READ RDSIZE |
| 566 | TAD RDSIZE |
| 567 | SNA / ANY MORE BLOCKS? |
| 568 | JMP DONE / NO, DO FINISH STUFF |
| 569 | DCA ARGSZ |
| 570 | TAD CBLOCK |
| 571 | DCA ARGBK |
| 572 | TAD DRVSEL |
| 573 | JMS DTA0 |
| 574 | 0010 / READ STARTING IN FIELD 1 |
| 575 | ARGSZ, 0 |
| 576 | 0 |
| 577 | ARGBK, 0 |
| 578 | JMP ERRRET |
| 579 | TAD (377 / All blocks good |
| 580 | DCA READST |
| 581 | / Send data, each block starts with FF |
| 582 | CLA CLL / then 2 12 bit words in 3 bytes |
| 583 | DCA LOC / ERRRET DUPLICATES SOME OF THIS |
| 584 | TAD ARGSZ |
| 585 | CIA |
| 586 | DCA BCNT / Setup loop counter with number blocks read |
| 587 | CDF 10 |
| 588 | OUTBL1, JMS OUTBLK / Send a block |
| 589 | ISZ CBLOCK |
| 590 | ISZ BCNT / Send all read? |
| 591 | JMP OUTBL1 / No |
| 592 | CDF 0 |
| 593 | JMP DUMPLP / Go read next batch |
| 594 | |
| 595 | |
| 596 | DONE, CLA / Send FE and -checksum of all words |
| 597 | TAD (376 |
| 598 | JMS PUN |
| 599 | CLA CLL |
| 600 | TAD CHKSM / Send checksum in two bytes, low bits first |
| 601 | CIA |
| 602 | JMS PUN |
| 603 | CLA CLL |
| 604 | TAD CHKSM |
| 605 | CIA |
| 606 | RTR |
| 607 | RTR |
| 608 | RTR |
| 609 | RTR |
| 610 | AND C17 |
| 611 | JMS PUN |
| 612 | CLA |
| 613 | TAD DRVSEL |
| 614 | JMS DTA0 / REWIND TAPE |
| 615 | 0010 |
| 616 | 1 |
| 617 | 0 |
| 618 | 0 |
| 619 | NOP |
| 620 | TAD ERRCN2 / Leave AC with # of errors |
| 621 | JMP FINISH |
| 622 | |
| 623 | /SEND GOOD BLOCKS READ WITH GOOD BLOCK FLAG |
| 624 | /THEN BAD WITH BAD BLOCK FLAG. |
| 625 | ERRRET, |
| 626 | / HLT / ****** If we want to stop on error |
| 627 | CDF 10 |
| 628 | CLA CLL |
| 629 | DCA LOC |
| 630 | TAD CBLOCK |
| 631 | CIA |
| 632 | TAD BLOCK /Get - number good blocks read |
| 633 | CIA /Last was bad |
| 634 | SNA |
| 635 | JMP FSTBAD /First block is bad, no good to send |
| 636 | DCA BCNT |
| 637 | TAD (377 |
| 638 | DCA READST |
| 639 | OUTBL2, JMS OUTBLK /Send good blocks |
| 640 | ISZ CBLOCK |
| 641 | ISZ BCNT |
| 642 | JMP OUTBL2 |
| 643 | FSTBAD, TAD (375 /NOW SEND BAD BLOCK |
| 644 | DCA READST |
| 645 | JMS OUTBLK |
| 646 | ISZ CBLOCK |
| 647 | ISZ ERRCN2 |
| 648 | CDF 0 |
| 649 | JMP DUMPLP /And read from here on |
| 650 | |
| 651 | PAGE |
| 652 | OUTBLK, 0 /Send a block of data out serial port |
| 653 | CLA |
| 654 | TAD WCOUNT |
| 655 | DCA LEN |
| 656 | TAD READST /Send good/bad flag |
| 657 | JMS PUN |
| 658 | OUT, CLA CLL |
| 659 | TAD I LOC |
| 660 | TAD CHKSM / Keep checksum of all words sent |
| 661 | DCA CHKSM |
| 662 | TAD I LOC / Send 2 words as 3 bytes |
| 663 | JMS PUN |
| 664 | CLA CLL |
| 665 | TAD I LOC |
| 666 | RTR / Shift top 4 bits to low 4 |
| 667 | RTR |
| 668 | RTR |
| 669 | RTR |
| 670 | AND C17 |
| 671 | DCA TEMP |
| 672 | ISZ LOC |
| 673 | JMP STFLD3+1 /NOT AT END OF FIELD (DJG) |
| 674 | RDF /At end, inc to next field |
| 675 | TAD (6211 /BUILD CDF |
| 676 | DCA STFLD3 |
| 677 | STFLD3, NOP |
| 678 | ISZ LEN /END IF BUFFER? |
| 679 | SKP /NO |
| 680 | JMP ENDBK /YES |
| 681 | TAD I LOC |
| 682 | TAD CHKSM |
| 683 | DCA CHKSM |
| 684 | TAD I LOC |
| 685 | RTL |
| 686 | RTL |
| 687 | AND C360 |
| 688 | TAD TEMP |
| 689 | JMS PUN |
| 690 | CLA CLL |
| 691 | TAD I LOC |
| 692 | RTR |
| 693 | RTR |
| 694 | JMS PUN |
| 695 | ISZ LOC |
| 696 | JMP STFLD4+1 /NOT AT END OF FIELD (DJG) |
| 697 | RDF |
| 698 | TAD (6211 /BUILD CDF |
| 699 | DCA STFLD4 |
| 700 | STFLD4, NOP |
| 701 | ISZ LEN |
| 702 | JMP OUT |
| 703 | JMP I OUTBLK |
| 704 | ENDBK, TAD TEMP /SEND LAST PART OF WORD |
| 705 | JMS PUN |
| 706 | JMP I OUTBLK |
| 707 | |
| 708 | PUN, 0 / Send byte out serial port |
| 709 | / PLS / Punch for testing with emulator |
| 710 | TLS2 / Send out console |
| 711 | CLA CLL |
| 712 | TAD CBLOCK |
| 713 | / PSF |
| 714 | TSF2 /Wait until character sent |
| 715 | JMP .-1 |
| 716 | CLA |
| 717 | JMP I PUN |
| 718 | |
| 719 | $ |