| 1 | /1 RK8E NON-SYSTEM HANDLER FOR OS/8 |
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| 11 | /COPYRIGHT (C) 1974,1975 BY DIGITAL EQUIPMENT CORPORATION |
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| 15 | / |
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| 21 | / |
| 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 | / |
| 38 | / |
| 39 | / |
| 40 | / |
| 41 | / |
| 42 | / |
| 43 | / |
| 44 | / |
| 45 | |
| 46 | /DEC-S8-URK8B-A-LA HJ |
| 47 | |
| 48 | /COPYRIGHT 1973 |
| 49 | |
| 50 | /DIGITAL EQUIPMENT CORPORATION |
| 51 | |
| 52 | /MAYNARD, MASSACHUSETTS 01754 |
| 53 | |
| 54 | /JANUARY 22, 1973 |
| 55 | \f |
| 56 | /ONE RK8E IS TREATED AS TWO LOGICAL DISKS |
| 57 | /EACH OF 3248 OS/8 BLOCKS. |
| 58 | |
| 59 | /THIS HANDLER CONTAINS ENTRY POINTS FOR THE 8 LOGICAL UNITS. |
| 60 | /(RKA0,RKB0,RKA1,RKB1,RKA2,RKB2,RKA3,RKB3) |
| 61 | |
| 62 | |
| 63 | DCLR=6742 |
| 64 | DLAG=6743 |
| 65 | DLDC=6746 |
| 66 | DRST=6745 |
| 67 | DSKP=6741 |
| 68 | DLCA=6744 |
| 69 | *0 |
| 70 | -10 |
| 71 | DEVICE RK05;DEVICE RKA0;4230;20;ZBLOCK 2 |
| 72 | DEVICE RK05;DEVICE RKB0;4230;21;ZBLOCK 2 |
| 73 | DEVICE RK05;DEVICE RKA1;4230;22;ZBLOCK 2 |
| 74 | DEVICE RK05;DEVICE RKB1;4230;23;ZBLOCK 2 |
| 75 | DEVICE RK05;DEVICE RKA2;4230;24;ZBLOCK 2 |
| 76 | DEVICE RK05;DEVICE RKB2;4230;25;ZBLOCK 2 |
| 77 | DEVICE RK05;DEVICE RKA3;4230;26;ZBLOCK 2 |
| 78 | DEVICE RK05;DEVICE RKB3;4230;27;ZBLOCK 2 |
| 79 | \f VERSION="A&77 |
| 80 | |
| 81 | *200 |
| 82 | |
| 83 | /THE FOLLOWING MUST REMAIN HERE BECAUSE OF THE R200 REF. |
| 84 | R37, 37 /USED TO CHECK FOR CYLINDER CHANGE |
| 85 | RKEBLK, 0 /12 BITS OF BLOCK NUMBER |
| 86 | CHKHED, 0 /CHECK HEADER FLAG |
| 87 | RKEARG, 0 /HOLDS RETURN ADDRESS |
| 88 | RKENO, 0 /HOLDS ENTRY POINT COUNT |
| 89 | PAGCNT, 0 /HOLDS REMAINING PAGE COUNT |
| 90 | RKEISZ, ISZ RKENO /TO PUT BACK OVER THE EP ADDR |
| 91 | |
| 92 | CTRLC, TAD R200 /TO IGNORE PARITY |
| 93 | KRS /READ THE KEYBOARD |
| 94 | TAD R7575 /SUBTRACT ^C |
| 95 | SNA CLA |
| 96 | KSF /IS KEYBOARD FLAG UP? |
| 97 | JMP RWAIT /NO |
| 98 | RCIF, CDF CIF 0 |
| 99 | JMP I R7600 /BOOTSTRAP |
| 100 | |
| 101 | |
| 102 | |
| 103 | |
| 104 | |
| 105 | |
| 106 | /NOTE: A LOCATION CAN BE EEKED OUT BY USING RKA0 BETTER |
| 107 | RERRCT, 0 /HOLDS RETRY COUNT |
| 108 | \f ZBLOCK 220-. /PAD ENTRY POINTS TO 220 |
| 109 | |
| 110 | RKA0, VERSION |
| 111 | RKB0, ISZ RKENO /THE ISZ'S SET UP A COUNT OF |
| 112 | RKA1, ISZ RKENO /OF WHICH ENTRY POINT WE CAME IN |
| 113 | RKB1, ISZ RKENO |
| 114 | RKA2, ISZ RKENO |
| 115 | RKB2, ISZ RKENO |
| 116 | RKA3, ISZ RKENO |
| 117 | RKB3, ISZ RKENO |
| 118 | R400, 400 /AN INNOCUOUS AND INSTRUCTION WHICH |
| 119 | /IS REFERENCED BY A TAD. |
| 120 | CLA CLL CMA RTL /AC=-3 |
| 121 | DCA RERRCT /RETRY 3 TIMES |
| 122 | TAD RKENO /7-EP NUMBER |
| 123 | CMA /EP-8 |
| 124 | TAD RKETAD /ADD ON INSTRUCTION |
| 125 | /WHICH REFERENCES THE 400 TO GENERATE A |
| 126 | /TAD CORRECT ENTRY POINT INSTRUCTION. |
| 127 | DCA GETENT /WE EXECUTE TO GET USERS ADDRESS |
| 128 | CLA CLL CML RTR /AC=2000 |
| 129 | TAD GETENT /GENERATE A DCA INTO ENTRY POINT INSTRUCTION |
| 130 | DCA RKECMD /THIS IS EXECUTED TO REPLACE ISZ RKENO |
| 131 | RDF /GET USERS DATA FIELD |
| 132 | TAD RCIF /BUILD A CIF FOR RETURNING |
| 133 | DCA REXIT /STORE IT INTO THE EXIT CODE |
| 134 | GETENT, HLT /WILL BE A TAD "ENTRY POINT" |
| 135 | /WILL SAVE UNIT INFO HERE FOR ERRORS |
| 136 | DCA RKEARG /SAVE USERS ADDR IN COMMON LOCATION |
| 137 | DCA RKENO /ZERO COUNT FOR NEXT TIME |
| 138 | TAD RKEISZ /GET THE ISZ RKENO |
| 139 | RKECMD, HLT /THE DCA ENTRY POINT IS PUT HERE |
| 140 | /AND THIS LOCATION IS USED FOR THE RK8E COMMAND |
| 141 | \f |
| 142 | |
| 143 | RETRY, TAD RKEARG /AC=-2 IF ERROR RETRY |
| 144 | DCA RKEARG |
| 145 | TAD GETENT |
| 146 | AND R6 /GET THE UNIT NUMBER |
| 147 | DCA RKECMD /SET UP UNIT FOR COMMAND |
| 148 | TAD GETENT |
| 149 | RAR /PUT HI/LOW LOGICAL DISK BIT IN LINK |
| 150 | SZL CLA |
| 151 | TAD R6260 /DISPLACEMENT TO 2ND HALF OF DISK |
| 152 | DCA RKA0 /NICE PLACE FOR A CONSTANT |
| 153 | TAD I RKEARG /GET ARG1 |
| 154 | AND R4070 /GET R/W AND DF BITS |
| 155 | TAD RKECMD /GET UNIT NUMBER |
| 156 | DCA RKECMD /BASE COMMAND TO RK8E(DLDC) |
| 157 | TAD I RKEARG /GET ARG1 AGAIN |
| 158 | TAD I RKEARG /GET ARG1 AGAIN |
| 159 | ISZ RKEARG /POINT TO ARG2 |
| 160 | AND R7600 |
| 161 | CIA /TO MAKE 0 LOOK LIKE 40 PAGES |
| 162 | DCA PAGCNT /SAVE PAGE COUNT |
| 163 | TAD I RKEARG /GET ARG2 |
| 164 | ISZ RKEARG /POINT TO ARG3 |
| 165 | DLCA /LOAD CURRENT ADDRESS REGISTER |
| 166 | \f |
| 167 | TAD I RKEARG /GET ARG3 |
| 168 | CLL |
| 169 | TAD RKA0 /SYS OR RKB0 DISPLACMENT |
| 170 | DCA RKEBLK /LOW PART OF RK8E BLOCK NUMBER |
| 171 | SZL /STILL OFF IF BELOW BLOCK 10000 |
| 172 | OVRFLO, ISZ RKECMD /TURN ON EXTENDED BIT IF OVERFLOWED |
| 173 | RELOOP, DCA CHKHED /SET CHECK HEADER FLAG TO EITHER |
| 174 | /0 OR 4000(WHICH GETS RTR'D BEFORE USED) |
| 175 | /AND CAUSES EITHER A "DATA" OR "ALL" |
| 176 | /TRANSFER |
| 177 | DCLR /CLEAR STATUS REGISTER |
| 178 | TAD PAGCNT /TEST TO SEE IF ONLY 1 PAGE WANTED |
| 179 | TAD R200 |
| 180 | SNA CLA |
| 181 | RKETAD, TAD R400 /7600 WAS IN PAGCNT |
| 182 | TAD CHKHED /ADD IN CHECK HEADER FLAG |
| 183 | CLL RTR /SHIFT TO CORRECT BITS |
| 184 | TAD RKECMD /ADD IN BASE COMMAND |
| 185 | DLDC /LOAD COMMAND REGISTER |
| 186 | TAD RKEBLK |
| 187 | DLAG /LOAD BLOCK REGISTER AND GO |
| 188 | RWAIT, DSKP /WAIT ON FLAG |
| 189 | JMP CTRLC /CHECK FOR CONTROL C WHILE WAITING |
| 190 | DRST /READ COMPLETION REGISTER |
| 191 | CLL RAL /GET RID OF SUCCESS BIT |
| 192 | SZA /AND SEE IF ANYTHING LEFT |
| 193 | JMP RERROR /AN ERROR |
| 194 | |
| 195 | /IF THERE WAS NO ERROR L=1 BECAUSE DONE FLAG |
| 196 | TAD PAGCNT /CHECK TO SEE IF DONE |
| 197 | TAD R400 /ADD 2 PAGES ONTO TOTAL |
| 198 | SNL |
| 199 | JMP RKDONE /NO MORE TO DO |
| 200 | DCA PAGCNT /SAVE FOR NEXT TIME |
| 201 | TAD RKEBLK |
| 202 | CMA |
| 203 | |
| 204 | /THE R37 MUST REMAIN AT 200 SO THE FOLLOWING IS A 200 |
| 205 | R200, AND R37 /IF BLOCK IS AT A 37 MAKE |
| 206 | /NEXT OPERATION DO A CHECK HEADER |
| 207 | SZA CLA |
| 208 | STL RAR /SET AC TO "ALL" FLAG |
| 209 | ISZ RKEBLK /BUMP BLOCK NUMBER |
| 210 | JMP RELOOP /TRANSFER SOME MORE |
| 211 | JMP OVRFLO /PAST BLOCK 7777-SET EXTENDED BIT |
| 212 | \f |
| 213 | RERROR, AND R1002 /AC WAS RAL'D AND WE WANT TO SEE IF |
| 214 | /DRIVE SEEK FAILED OR CYLINDER ADDR ERROR |
| 215 | SNA CLA |
| 216 | JMP RKTST3 /WE TRY 3 TIMES |
| 217 | /WE HAVE TO RECALIBRATE DRIVE |
| 218 | DCLR /CLEAR STAUS REGISTER |
| 219 | STL RTL /AC=2 |
| 220 | DCLR /RECALIBRATE DRIVE |
| 221 | DSKP /WAIT ON FLAG |
| 222 | JMP .-1 |
| 223 | DCLR /CLEAR STATUS REGISTER |
| 224 | DRST /WAIT FOR STATUS TO CLEAR |
| 225 | SZA CLA |
| 226 | JMP .-2 /STILL DOING RECALIBRATE |
| 227 | RKTST3, CLA CLL CMA RAL /AC=-2 |
| 228 | ISZ RERRCT /SKIP IF WE TRIED 3 TIMES |
| 229 | JMP RETRY /TRY AGAIN |
| 230 | JMP .+3 /ERROR EXIT |
| 231 | RKDONE, ISZ RKEARG /NORMAL RETURN |
| 232 | R7600, 7600 /GROUP 2 CLA |
| 233 | ISZ RKEARG /IF JUMPED TO HERE- ERROR RETURN |
| 234 | REXIT, HLT /RESET USERS INST FIELD- WE NEVER TOUCHED DF |
| 235 | JMP I RKEARG /EXIT |
| 236 | |
| 237 | R6260, 6260 /SIZE OF ONE LOGICAL DISK |
| 238 | R4070, 4070 /USED TO GET READ/WRITE AND DF BITS |
| 239 | R1002, 1002 / " TO CHECK FOR RECALIBRATE ERRORS |
| 240 | R6, 6 /TO PEEL OUT UNIT NUMBER |
| 241 | R7575, 7575 /- ^C CONSTANT |
| 242 | |
| 243 | |
| 244 | $$$$ |
| 245 | \f |