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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 |