| 1 | /* i1401_sys.c: IBM 1401 simulator interface\r |
| 2 | \r |
| 3 | Copyright (c) 1993-2005, Robert M. Supnik\r |
| 4 | \r |
| 5 | Permission is hereby granted, free of charge, to any person obtaining a\r |
| 6 | copy of this software and associated documentation files (the "Software"),\r |
| 7 | to deal in the Software without restriction, including without limitation\r |
| 8 | the rights to use, copy, modify, merge, publish, distribute, sublicense,\r |
| 9 | and/or sell copies of the Software, and to permit persons to whom the\r |
| 10 | Software is furnished to do so, subject to the following conditions:\r |
| 11 | \r |
| 12 | The above copyright notice and this permission notice shall be included in\r |
| 13 | all copies or substantial portions of the Software.\r |
| 14 | \r |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r |
| 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r |
| 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r |
| 18 | ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r |
| 19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r |
| 20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r |
| 21 | \r |
| 22 | Except as contained in this notice, the name of Robert M Supnik shall not be\r |
| 23 | used in advertising or otherwise to promote the sale, use or other dealings\r |
| 24 | in this Software without prior written authorization from Robert M Supnik.\r |
| 25 | \r |
| 26 | 20-Sep-05 RMS Revised for new code tables\r |
| 27 | 04-Jan-05 WVS Added address argument support\r |
| 28 | 14-Nov-04 WVS Added data printout support\r |
| 29 | 16-Mar-03 RMS Fixed mnemonic for MCS\r |
| 30 | 03-Jun-02 RMS Added 1311 support\r |
| 31 | 18-May-02 RMS Added -D feature from Van Snyder\r |
| 32 | 26-Jan-02 RMS Fixed H, NOP with no trailing wm (found by Van Snyder)\r |
| 33 | 17-Sep-01 RMS Removed multiconsole support\r |
| 34 | 13-Jul-01 RMS Fixed bug in symbolic output (found by Peter Schorn)\r |
| 35 | 27-May-01 RMS Added multiconsole support\r |
| 36 | 14-Mar-01 RMS Revised load/dump interface (again)\r |
| 37 | 30-Oct-00 RMS Added support for examine to file\r |
| 38 | 27-Oct-98 RMS V2.4 load interface\r |
| 39 | */\r |
| 40 | \r |
| 41 | #include "i1401_defs.h"\r |
| 42 | #include <ctype.h>\r |
| 43 | \r |
| 44 | #define LINE_LNT 80\r |
| 45 | extern DEVICE cpu_dev, inq_dev, lpt_dev;\r |
| 46 | extern DEVICE cdr_dev, cdp_dev, stack_dev;\r |
| 47 | extern DEVICE dp_dev, mt_dev;\r |
| 48 | extern UNIT cpu_unit;\r |
| 49 | extern REG cpu_reg[];\r |
| 50 | extern uint8 M[];\r |
| 51 | extern char ascii_to_bcd_old[128], ascii_to_bcd[128];\r |
| 52 | extern char bcd_to_ascii_old[64], bcd_to_ascii_a[64], bcd_to_ascii_h[64];\r |
| 53 | extern char *get_glyph (char *cptr, char *gbuf, char term);\r |
| 54 | extern int32 store_addr_h (int32 addr);\r |
| 55 | extern int32 store_addr_t (int32 addr);\r |
| 56 | extern int32 store_addr_u (int32 addr);\r |
| 57 | extern t_bool conv_old;\r |
| 58 | \r |
| 59 | /* SCP data structures and interface routines\r |
| 60 | \r |
| 61 | sim_name simulator name string\r |
| 62 | sim_PC pointer to saved PC register descriptor\r |
| 63 | sim_emax maximum number of words for examine/deposit\r |
| 64 | sim_devices array of pointers to simulated devices\r |
| 65 | sim_stop_messages array of pointers to stop messages\r |
| 66 | sim_load binary loader\r |
| 67 | */\r |
| 68 | \r |
| 69 | char sim_name[] = "IBM 1401";\r |
| 70 | \r |
| 71 | REG *sim_PC = &cpu_reg[0];\r |
| 72 | \r |
| 73 | int32 sim_emax = LINE_LNT;\r |
| 74 | \r |
| 75 | DEVICE *sim_devices[] = {\r |
| 76 | &cpu_dev,\r |
| 77 | &inq_dev,\r |
| 78 | &cdr_dev,\r |
| 79 | &cdp_dev,\r |
| 80 | &stack_dev,\r |
| 81 | &lpt_dev,\r |
| 82 | &mt_dev,\r |
| 83 | &dp_dev,\r |
| 84 | NULL\r |
| 85 | };\r |
| 86 | \r |
| 87 | const char *sim_stop_messages[] = {\r |
| 88 | "Unknown error",\r |
| 89 | "Unimplemented instruction",\r |
| 90 | "Non-existent memory",\r |
| 91 | "Non-existent device",\r |
| 92 | "No WM at instruction start",\r |
| 93 | "Invalid A address",\r |
| 94 | "Invalid B address",\r |
| 95 | "Invalid instruction length",\r |
| 96 | "Invalid modifer",\r |
| 97 | "Invalid branch address",\r |
| 98 | "Breakpoint",\r |
| 99 | "HALT instruction",\r |
| 100 | "Invalid MT unit number",\r |
| 101 | "Invalid MT record length",\r |
| 102 | "Write to locked MT unit", \r |
| 103 | "Skip to unpunched CCT channel",\r |
| 104 | "Card reader empty",\r |
| 105 | "Address register wrap",\r |
| 106 | "I/O check",\r |
| 107 | "Invalid disk sector address",\r |
| 108 | "Invalid disk sector count",\r |
| 109 | "Invalid disk unit",\r |
| 110 | "Invalid disk function",\r |
| 111 | "Invalid disk record length",\r |
| 112 | "Write track while disabled",\r |
| 113 | "Write check error",\r |
| 114 | "Disk address miscompare",\r |
| 115 | "Direct seek cylinder exceeds maximum"\r |
| 116 | };\r |
| 117 | \r |
| 118 | /* Binary loader -- load carriage control tape\r |
| 119 | \r |
| 120 | A carriage control tape consists of entries of the form\r |
| 121 | \r |
| 122 | (repeat count) column number,column number,column number,...\r |
| 123 | \r |
| 124 | The CCT entries are stored in cct[0:lnt-1], cctlnt contains the\r |
| 125 | number of entries\r |
| 126 | */\r |
| 127 | \r |
| 128 | t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag)\r |
| 129 | {\r |
| 130 | int32 col, rpt, ptr, mask, cctbuf[CCT_LNT];\r |
| 131 | t_stat r;\r |
| 132 | extern int32 cctlnt, cctptr, cct[CCT_LNT];\r |
| 133 | char cbuf[CBUFSIZE], gbuf[CBUFSIZE];\r |
| 134 | \r |
| 135 | if ((*cptr != 0) || (flag != 0)) return SCPE_ARG;\r |
| 136 | ptr = 0;\r |
| 137 | for ( ; (cptr = fgets (cbuf, CBUFSIZE, fileref)) != NULL; ) { /* until eof */\r |
| 138 | mask = 0;\r |
| 139 | if (*cptr == '(') { /* repeat count? */\r |
| 140 | cptr = get_glyph (cptr + 1, gbuf, ')'); /* get 1st field */\r |
| 141 | rpt = get_uint (gbuf, 10, CCT_LNT, &r); /* repeat count */\r |
| 142 | if (r != SCPE_OK) return SCPE_FMT;\r |
| 143 | }\r |
| 144 | else rpt = 1;\r |
| 145 | while (*cptr != 0) { /* get col no's */\r |
| 146 | cptr = get_glyph (cptr, gbuf, ','); /* get next field */\r |
| 147 | col = get_uint (gbuf, 10, 12, &r); /* column number */\r |
| 148 | if (r != SCPE_OK) return SCPE_FMT;\r |
| 149 | mask = mask | (1 << col); /* set bit */\r |
| 150 | }\r |
| 151 | for ( ; rpt > 0; rpt--) { /* store vals */\r |
| 152 | if (ptr >= CCT_LNT) return SCPE_FMT;\r |
| 153 | cctbuf[ptr++] = mask;\r |
| 154 | }\r |
| 155 | }\r |
| 156 | if (ptr == 0) return SCPE_FMT;\r |
| 157 | cctlnt = ptr;\r |
| 158 | cctptr = 0;\r |
| 159 | for (rpt = 0; rpt < cctlnt; rpt++) cct[rpt] = cctbuf[rpt];\r |
| 160 | return SCPE_OK;\r |
| 161 | }\r |
| 162 | \r |
| 163 | /* Symbol table */\r |
| 164 | \r |
| 165 | const char *opcode[64] = {\r |
| 166 | NULL, "R", "W", "WR", "P", "RP", "WP", "WRP",\r |
| 167 | "SRF", "SPF", NULL, "MA", "MUL", NULL, NULL, NULL,\r |
| 168 | NULL, "CS", "S", NULL, "MTF", "BWZ", "BBE", NULL,\r |
| 169 | "MZ", "MCS", NULL, "SWM", "DIV", NULL, NULL, NULL,\r |
| 170 | NULL, NULL, "SS", "LCA", "MCW", "NOP", NULL, "MCM",\r |
| 171 | "SAR", NULL, "ZS", NULL, NULL, NULL, NULL, NULL,\r |
| 172 | NULL, "A", "B", "C", "MN", "MCE", "CC", NULL,\r |
| 173 | "SBR", NULL, "ZA", "H", "CWM", NULL, NULL, NULL\r |
| 174 | };\r |
| 175 | \r |
| 176 | /* Print an address from three characters */\r |
| 177 | \r |
| 178 | void fprint_addr (FILE *of, t_value *dig)\r |
| 179 | {\r |
| 180 | int32 addr, xa;\r |
| 181 | extern int32 hun_table[64], ten_table[64], one_table[64];\r |
| 182 | \r |
| 183 | addr = hun_table[dig[0] & CHAR] + ten_table[dig[1]] + one_table[dig[2]];\r |
| 184 | xa = (addr >> V_INDEX) & M_INDEX;\r |
| 185 | if (xa) fprintf (of, " %d,%d", addr & ADDRMASK, ((xa - (X1 >> V_INDEX)) / 5) + 1);\r |
| 186 | else if (addr >= MAXMEMSIZE) fprintf (of, " %d*", addr & ADDRMASK);\r |
| 187 | else fprintf (of, " %d", addr);\r |
| 188 | return;\r |
| 189 | }\r |
| 190 | \r |
| 191 | /* Print unknown opcode as data */\r |
| 192 | \r |
| 193 | t_stat dcw (FILE *of, int32 op, t_value *val, int32 sw)\r |
| 194 | {\r |
| 195 | int32 i;\r |
| 196 | t_bool use_h = sw & SWMASK ('F');\r |
| 197 | \r |
| 198 | fprintf (of, "DCW @%c", bcd2ascii (op, use_h)); /* assume it's data */\r |
| 199 | for (i = 1; i < sim_emax; i++) {\r |
| 200 | if (val[i] & WM) break;\r |
| 201 | fprintf (of, "%c", bcd2ascii (val[i], use_h));\r |
| 202 | }\r |
| 203 | fprintf (of, "@");\r |
| 204 | return -(i - 1); /* return # chars */\r |
| 205 | }\r |
| 206 | \r |
| 207 | /* Symbolic decode\r |
| 208 | \r |
| 209 | Inputs:\r |
| 210 | *of = output stream\r |
| 211 | addr = current address\r |
| 212 | *val = values to decode\r |
| 213 | *uptr = pointer to unit\r |
| 214 | sw = switches\r |
| 215 | Outputs:\r |
| 216 | return = if >= 0, error code\r |
| 217 | if < 0, number of extra words retired\r |
| 218 | */\r |
| 219 | \r |
| 220 | #define FMTASC(x) ((x) < 040)? "<%03o>": "%c", (x)\r |
| 221 | \r |
| 222 | t_stat fprint_sym (FILE *of, t_addr addr, t_value *val,\r |
| 223 | UNIT *uptr, int32 sw)\r |
| 224 | {\r |
| 225 | int32 op, flags, ilnt, i, t;\r |
| 226 | int32 wmch = conv_old? '~': '`';\r |
| 227 | t_bool use_h = sw & SWMASK ('F');\r |
| 228 | extern int32 op_table[64], len_table[9];\r |
| 229 | \r |
| 230 | if (sw & SWMASK ('C')) { /* character? */\r |
| 231 | t = val[0];\r |
| 232 | if (uptr->flags & UNIT_BCD) {\r |
| 233 | if (t & WM) fputc (wmch, of);\r |
| 234 | fputc (bcd2ascii (t & CHAR, use_h), of);\r |
| 235 | }\r |
| 236 | else fprintf (of, FMTASC (t & 0177));\r |
| 237 | return SCPE_OK;\r |
| 238 | }\r |
| 239 | if ((uptr != NULL) && (uptr != &cpu_unit)) /* CPU? */\r |
| 240 | return SCPE_ARG;\r |
| 241 | if (sw & SWMASK ('D')) { /* dump? */\r |
| 242 | for (i = 0; i < 50; i++)\r |
| 243 | fprintf (of, "%c", bcd2ascii (val[i] & CHAR, use_h)) ;\r |
| 244 | fprintf (of, "\n\t");\r |
| 245 | for (i = 0; i < 50; i++)\r |
| 246 | fprintf (of, (val[i] & WM)? "1": " ") ;\r |
| 247 | return -(i - 1);\r |
| 248 | }\r |
| 249 | if (sw & SWMASK ('S')) { /* string? */\r |
| 250 | i = 0;\r |
| 251 | do {\r |
| 252 | t = val[i++];\r |
| 253 | if (t & WM) fputc (wmch, of);\r |
| 254 | fputc (bcd2ascii (t & CHAR, use_h), of);\r |
| 255 | } while ((i < LINE_LNT) && ((val[i] & WM) == 0));\r |
| 256 | return -(i - 1);\r |
| 257 | }\r |
| 258 | if ((sw & SWMASK ('M')) == 0) return SCPE_ARG;\r |
| 259 | \r |
| 260 | if ((val[0] & WM) == 0) return STOP_NOWM; /* WM under op? */\r |
| 261 | op = val[0]& CHAR; /* isolate op */\r |
| 262 | if (opcode[op] == NULL) return dcw (of, op, val, sw); /* invalid op */\r |
| 263 | flags = op_table[op]; /* get flags */\r |
| 264 | for (ilnt = 1; ilnt < sim_emax; ilnt++) { /* find inst lnt */\r |
| 265 | if (val[ilnt] & WM) break;\r |
| 266 | }\r |
| 267 | if ((flags & (NOWM | HNOP)) && (ilnt > 7)) ilnt = 7; /* cs, swm, h, nop? */\r |
| 268 | else if ((op == OP_B) && (ilnt > 4) && (val[4] == BCD_BLANK)) ilnt = 4;\r |
| 269 | else if ((ilnt > 8) && (op != OP_NOP)) ilnt = 8; /* cap length */\r |
| 270 | if (ilnt == 3) { /* lnt = 3? */\r |
| 271 | fprintf (of, "DSA"); /* assume DSA */\r |
| 272 | fprint_addr (of, val); /* print addr */\r |
| 273 | return -(ilnt - 1);\r |
| 274 | }\r |
| 275 | if ((((flags & len_table[ilnt]) == 0) && /* invalid lnt, */\r |
| 276 | (op != OP_NOP)) || /* not nop? */\r |
| 277 | (opcode[op] == NULL)) /* or undef? */\r |
| 278 | return dcw (of, op, val, sw);\r |
| 279 | fprintf (of, "%s",opcode[op]); /* print opcode */\r |
| 280 | if (ilnt > 2) { /* A address? */\r |
| 281 | if (((flags & IO) || (op == OP_NOP)) && (val[1] == BCD_PERCNT))\r |
| 282 | fprintf (of, " %%%c%c", bcd2ascii (val[2], use_h),\r |
| 283 | bcd2ascii (val[3], sw));\r |
| 284 | else fprint_addr (of, &val[1]);\r |
| 285 | }\r |
| 286 | if (ilnt > 5) fprint_addr (of, &val[4]); /* B address? */\r |
| 287 | if ((ilnt == 2) || (ilnt == 5) || (ilnt == 8)) /* d character? */\r |
| 288 | fprintf (of, " '%c", bcd2ascii (val[ilnt - 1], use_h));\r |
| 289 | return -(ilnt - 1); /* return # chars */\r |
| 290 | }\r |
| 291 | \r |
| 292 | /* get_addr - get address + index pair */\r |
| 293 | \r |
| 294 | t_stat get_addr (char *cptr, t_value *val)\r |
| 295 | {\r |
| 296 | int32 addr, index;\r |
| 297 | t_stat r;\r |
| 298 | char gbuf[CBUFSIZE];\r |
| 299 | \r |
| 300 | cptr = get_glyph (cptr, gbuf, ','); /* get address */\r |
| 301 | addr = get_uint (gbuf, 10, MAXMEMSIZE, &r);\r |
| 302 | if (r != SCPE_OK) return SCPE_ARG;\r |
| 303 | if (*cptr != 0) { /* more? */\r |
| 304 | cptr = get_glyph (cptr, gbuf, ' ');\r |
| 305 | index = get_uint (gbuf, 10, 3, &r);\r |
| 306 | if ((r != SCPE_OK) || (index == 0)) return SCPE_ARG;\r |
| 307 | }\r |
| 308 | else index = 0;\r |
| 309 | if (*cptr != 0) return SCPE_ARG;\r |
| 310 | val[0] = store_addr_h (addr);\r |
| 311 | val[1] = store_addr_t (addr) | (index << V_ZONE);\r |
| 312 | val[2] = store_addr_u (addr);\r |
| 313 | return SCPE_OK;\r |
| 314 | }\r |
| 315 | \r |
| 316 | /* get_io - get I/O address */\r |
| 317 | \r |
| 318 | t_stat get_io (char *cptr, t_value *val)\r |
| 319 | {\r |
| 320 | if ((cptr[0] != '%') || (cptr[3] != 0) || !isalnum (cptr[1]) ||\r |
| 321 | !isalnum (cptr[2])) return SCPE_ARG;\r |
| 322 | val[0] = BCD_PERCNT;\r |
| 323 | val[1] = ascii2bcd (cptr[1]);\r |
| 324 | val[2] = ascii2bcd (cptr[2]);\r |
| 325 | return SCPE_OK;\r |
| 326 | }\r |
| 327 | \r |
| 328 | /* Symbolic input\r |
| 329 | \r |
| 330 | Inputs:\r |
| 331 | *cptr = pointer to input string\r |
| 332 | addr = current PC\r |
| 333 | *uptr = pointer to unit\r |
| 334 | *val = pointer to output values\r |
| 335 | sw = switches\r |
| 336 | Outputs:\r |
| 337 | status = > 0 error code\r |
| 338 | <= 0 -number of extra words\r |
| 339 | */\r |
| 340 | \r |
| 341 | t_stat parse_sym (char *cptr, t_addr addr, UNIT *uptr, t_value *val, int32 sw)\r |
| 342 | {\r |
| 343 | int32 i, op, ilnt, t, cflag, wm_seen;\r |
| 344 | int32 wmch = conv_old? '~': '`';\r |
| 345 | extern int32 op_table[64], len_table[9];\r |
| 346 | char gbuf[CBUFSIZE];\r |
| 347 | \r |
| 348 | cflag = (uptr == NULL) || (uptr == &cpu_unit);\r |
| 349 | while (isspace (*cptr)) cptr++; /* absorb spaces */\r |
| 350 | if ((sw & SWMASK ('C')) || (sw & SWMASK ('S')) || (*cptr == wmch) ||\r |
| 351 | ((*cptr == '\'') && cptr++) || ((*cptr == '"') && cptr++)) {\r |
| 352 | wm_seen = 0;\r |
| 353 | for (i = 0; (i < sim_emax) && (*cptr != 0); ) {\r |
| 354 | t = *cptr++; /* get character */\r |
| 355 | if (cflag && (wm_seen == 0) && (t == wmch)) wm_seen = WM;\r |
| 356 | else if (uptr->flags & UNIT_BCD) {\r |
| 357 | if (t < 040) return SCPE_ARG;\r |
| 358 | val[i++] = ascii2bcd (t) | wm_seen;\r |
| 359 | wm_seen = 0;\r |
| 360 | }\r |
| 361 | else val[i++] = t;\r |
| 362 | }\r |
| 363 | if ((i == 0) || wm_seen) return SCPE_ARG;\r |
| 364 | return -(i - 1);\r |
| 365 | }\r |
| 366 | \r |
| 367 | if (cflag == 0) return SCPE_ARG; /* CPU only */\r |
| 368 | cptr = get_glyph (cptr, gbuf, 0); /* get opcode */\r |
| 369 | for (op = 0; op < 64; op++) { /* look it up */\r |
| 370 | if (opcode[op] && strcmp (gbuf, opcode[op]) == 0) break;\r |
| 371 | }\r |
| 372 | if (op >= 64) return SCPE_ARG; /* successful? */\r |
| 373 | val[0] = op | WM; /* store opcode */\r |
| 374 | cptr = get_glyph (cptr, gbuf, 0); /* get addr or d */\r |
| 375 | if (((op_table[op] && IO) && (get_io (gbuf, &val[1]) == SCPE_OK)) ||\r |
| 376 | (get_addr (gbuf, &val[1]) == SCPE_OK)) {\r |
| 377 | cptr = get_glyph (cptr, gbuf, 0); /* get addr or d */\r |
| 378 | if (get_addr (gbuf, &val[4]) == SCPE_OK) {\r |
| 379 | cptr = get_glyph (cptr, gbuf, ','); /* get d */\r |
| 380 | ilnt = 7; /* a and b addresses */\r |
| 381 | }\r |
| 382 | else ilnt = 4; /* a address */\r |
| 383 | }\r |
| 384 | else ilnt = 1; /* no addresses */\r |
| 385 | if ((gbuf[0] == '\'') || (gbuf[0] == '"')) { /* d character? */\r |
| 386 | t = gbuf[1];\r |
| 387 | if ((gbuf[2] != 0) || (*cptr != 0) || (t < 040))\r |
| 388 | return SCPE_ARG; /* end and legal? */\r |
| 389 | val[ilnt] = ascii2bcd (t); /* save D char */\r |
| 390 | ilnt = ilnt + 1;\r |
| 391 | }\r |
| 392 | else if (gbuf[0] != 0) return SCPE_ARG; /* not done? */\r |
| 393 | if ((op_table[op] & len_table[ilnt]) == 0) return STOP_INVL;\r |
| 394 | return -(ilnt - 1);\r |
| 395 | }\r |
| 396 | \r |
| 397 | /* Convert BCD to ASCII */\r |
| 398 | \r |
| 399 | int32 bcd2ascii (int32 c, t_bool use_h)\r |
| 400 | {\r |
| 401 | if (conv_old) return bcd_to_ascii_old[c];\r |
| 402 | else if (use_h) return bcd_to_ascii_h[c];\r |
| 403 | else return bcd_to_ascii_a[c];\r |
| 404 | }\r |
| 405 | \r |
| 406 | /* Convert ASCII to BCD */\r |
| 407 | \r |
| 408 | int32 ascii2bcd (int32 c)\r |
| 409 | {\r |
| 410 | if (conv_old) return ascii_to_bcd_old[c];\r |
| 411 | else return ascii_to_bcd[c];\r |
| 412 | }\r |