-
Notifications
You must be signed in to change notification settings - Fork 304
/
pdp11_sys.c
1114 lines (1003 loc) · 39.2 KB
/
pdp11_sys.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* pdp11_sys.c: PDP-11 simulator interface
Copyright (c) 1993-2013, Robert M Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Robert M Supnik shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
02-Sep-13 RMS Added third Massbus, RS03/RS04
29-Apr-12 RMS Fixed compiler warning (Mark Pizzolato)
19-Nov-08 RMS Moved I/O support routines to I/O library
15-May-08 RMS Added KE11-A, DC11 support
Renamed DL11
04-Feb-08 RMS Modified to allow -A, -B use with 8b devices
25-Jan-08 RMS Added RC11, KG11A support from John Dundas
10-Sep-07 RMS Cleaned up binary loader
20-Dec-06 RMS Added TA11 support
12-Nov-06 RMS Fixed operand order in EIS instructions (W.F.J. Mueller)
14-Jul-06 RMS Reordered device list
06-Jul-06 RMS Added multiple KL11/DL11 support
26-Jun-06 RMS Added RF11 support
17-May-06 RMS Added CR11/CD11 support (John Dundas)
16-Aug-05 RMS Fixed C++ declaration and cast problems
22-Jul-05 RMS Fixed missing , in initializer (Doug Gwyn)
22-Dec-03 RMS Added second DEUNA/DELUA support
18-Oct-03 RMS Added DECtape off reel message
14-Sep-03 PLB Added VT11 support
06-May-03 RMS Added support for second DEQNA/DELQA
09-Jan-03 RMS Added DELUA/DEUNA support
17-Oct-02 RMS Fixed bugs in branch, SOB address parsing
09-Oct-02 RMS Added DELQA support
12-Sep-02 RMS Added TMSCP, KW11P, RX211 support, RAD50 examine
29-Nov-01 RMS Added read only unit support
17-Sep-01 RMS Removed multiconsole support
26-Aug-01 RMS Added DZ11
20-Aug-01 RMS Updated bad block inquiry
17-Jul-01 RMS Fixed warning from VC++ 6.0
27-May-01 RMS Added multiconsole support
05-Apr-01 RMS Added support for TS11/TSV05
14-Mar-01 RMS Revised load/dump interface (again)
11-Feb-01 RMS Added DECtape support
30-Oct-00 RMS Added support for examine to file
14-Apr-99 RMS Changed t_addr to unsigned
09-Nov-98 RMS Fixed assignments of ROR/ROL (John Wilson)
27-Oct-98 RMS V2.4 load interface
08-Oct-98 RMS Fixed bug in bad block routine
30-Mar-98 RMS Fixed bug in floating point display
12-Nov-97 RMS Added bad block table routine
*/
#include "pdp11_defs.h"
#include <ctype.h>
extern DEVICE cpu_dev;
extern DEVICE sys_dev;
extern DEVICE ptr_dev;
extern DEVICE ptp_dev;
extern DEVICE tti_dev;
extern DEVICE tto_dev;
extern DEVICE lpt_dev;
extern DEVICE cr_dev;
extern DEVICE clk_dev;
extern DEVICE pclk_dev;
extern DEVICE dli_dev;
extern DEVICE dlo_dev;
extern DEVICE dci_dev;
extern DEVICE dco_dev;
extern DEVICE dz_dev;
extern DEVICE vh_dev;
extern DEVICE dt_dev;
extern DEVICE rc_dev;
extern DEVICE rf_dev;
extern DEVICE rk_dev;
extern DEVICE rl_dev;
extern DEVICE hk_dev;
extern DEVICE rx_dev;
extern DEVICE ry_dev;
extern DEVICE mba_dev[];
extern DEVICE rp_dev;
extern DEVICE rs_dev;
extern DEVICE rq_dev, rqb_dev, rqc_dev, rqd_dev;
extern DEVICE tm_dev;
extern DEVICE tq_dev;
extern DEVICE ts_dev;
extern DEVICE tu_dev;
extern DEVICE ta_dev;
#ifdef USE_DISPLAY
extern DEVICE vt_dev;
#endif
extern DEVICE xq_dev, xqb_dev;
extern DEVICE xu_dev, xub_dev;
extern DEVICE ke_dev;
extern DEVICE kg_dev;
extern DEVICE dmc_dev;
extern DEVICE dup_dev;
extern DEVICE dpv_dev;
extern DEVICE kmc_dev;
extern UNIT cpu_unit;
extern REG cpu_reg[];
extern uint16 *M;
extern int32 saved_PC;
/* SCP data structures and interface routines
sim_name simulator name string
sim_PC pointer to saved PC register descriptor
sim_emax number of words for examine
sim_devices array of pointers to simulated devices
sim_stop_messages array of pointers to stop messages
sim_load binary loader
*/
char sim_name[] = "PDP-11";
REG *sim_PC = &cpu_reg[0];
int32 sim_emax = 4;
DEVICE *sim_devices[] = {
&cpu_dev,
&sys_dev,
&mba_dev[0],
&mba_dev[1],
&mba_dev[2],
&clk_dev,
&pclk_dev,
&ptr_dev,
&ptp_dev,
&tti_dev,
&tto_dev,
&cr_dev,
&lpt_dev,
&dli_dev,
&dlo_dev,
&dci_dev,
&dco_dev,
&dz_dev,
&vh_dev,
&rc_dev,
&rf_dev,
&rk_dev,
&rl_dev,
&hk_dev,
&rx_dev,
&ry_dev,
&rp_dev,
&rs_dev,
&rq_dev,
&rqb_dev,
&rqc_dev,
&rqd_dev,
&dt_dev,
&tm_dev,
&ts_dev,
&tq_dev,
&tu_dev,
&ta_dev,
#ifdef USE_DISPLAY
&vt_dev,
#endif
&xq_dev,
&xqb_dev,
&xu_dev,
&xub_dev,
&ke_dev,
&kg_dev,
&dmc_dev,
&dup_dev,
&dpv_dev,
&kmc_dev,
NULL
};
const char *sim_stop_messages[] = {
"Unknown error",
"Red stack trap",
"Odd address trap",
"Memory management trap",
"Non-existent memory trap",
"Parity error trap",
"Privilege trap",
"Illegal instruction trap",
"BPT trap",
"IOT trap",
"EMT trap",
"TRAP trap",
"Trace trap",
"Yellow stack trap",
"Powerfail trap",
"Floating point exception",
"HALT instruction",
"Breakpoint",
"Wait state",
"Trap vector fetch abort",
"Trap stack push abort",
"RQDX3 consistency error",
"Sanity timer expired",
"DECtape off reel"
};
/* Binary loader.
Loader format consists of blocks, optionally preceded, separated, and
followed by zeroes. Each block consists of:
001 ---
xxx |
lo_count |
hi_count |
lo_origin > count bytes
hi_origin |
data byte |
: |
data byte ---
checksum
If the byte count is exactly six, the block is the last on the tape, and
there is no checksum. If the origin is not 000001, then the origin is
the PC at which to start the program.
*/
t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag)
{
int32 c[6], d, i, cnt, csum;
uint32 org;
if ((*cptr != 0) || (flag != 0))
return SCPE_ARG;
do { /* block loop */
csum = 0; /* init checksum */
for (i = 0; i < 6; ) { /* 6 char header */
if ((c[i] = getc (fileref)) == EOF)
return SCPE_FMT;
if ((i != 0) || (c[i] == 1)) /* 1st must be 1 */
csum = csum + c[i++]; /* add into csum */
}
cnt = (c[3] << 8) | c[2]; /* count */
org = (c[5] << 8) | c[4]; /* origin */
if (cnt < 6) /* invalid? */
return SCPE_FMT;
if (cnt == 6) { /* end block? */
if (org != 1) /* set PC? */
saved_PC = org & 0177776;
return SCPE_OK;
}
for (i = 6; i < cnt; i++) { /* exclude hdr */
if ((d = getc (fileref)) == EOF) /* data char */
return SCPE_FMT;
csum = csum + d; /* add into csum */
if (org >= MEMSIZE) /* invalid addr? */
return SCPE_NXM;
M[org >> 1] = (org & 1)? /* store data */
(M[org >> 1] & 0377) | (uint16)(d << 8):
(M[org >> 1] & 0177400) | (uint16)d;
org = (org + 1) & 0177777; /* inc origin */
}
if ((d = getc (fileref)) == EOF) /* get csum */
return SCPE_FMT;
csum = csum + d; /* add in */
} while ((csum & 0377) == 0); /* result mbz */
return SCPE_CSUM;
}
/* Symbol tables */
#define I_V_L 16 /* long mode */
#define I_V_D 17 /* double mode */
#define I_L (1 << I_V_L)
#define I_D (1 << I_V_D)
/* Warning: for literals, the class number MUST equal the field width!! */
#define I_V_CL 18 /* class bits */
#define I_M_CL 037 /* class mask */
#define I_V_NPN 0 /* no operands */
#define I_V_REG 1 /* reg */
#define I_V_SOP 2 /* operand */
#define I_V_3B 3 /* 3b literal */
#define I_V_FOP 4 /* flt operand */
#define I_V_AFOP 5 /* fac, flt operand */
#define I_V_6B 6 /* 6b literal */
#define I_V_BR 7 /* cond branch */
#define I_V_8B 8 /* 8b literal */
#define I_V_SOB 9 /* reg, disp */
#define I_V_RSOP 10 /* reg, operand */
#define I_V_ASOP 11 /* fac, operand */
#define I_V_ASMD 12 /* fac, moded int op */
#define I_V_DOP 13 /* double operand */
#define I_V_CCC 14 /* CC clear */
#define I_V_CCS 15 /* CC set */
#define I_V_SOPR 16 /* operand, reg */
#define I_NPN (I_V_NPN << I_V_CL)
#define I_REG (I_V_REG << I_V_CL)
#define I_3B (I_V_3B << I_V_CL)
#define I_SOP (I_V_SOP << I_V_CL)
#define I_FOP (I_V_FOP << I_V_CL)
#define I_6B (I_V_6B << I_V_CL)
#define I_BR (I_V_BR << I_V_CL)
#define I_8B (I_V_8B << I_V_CL)
#define I_AFOP (I_V_AFOP << I_V_CL)
#define I_ASOP (I_V_ASOP << I_V_CL)
#define I_RSOP (I_V_RSOP << I_V_CL)
#define I_SOB (I_V_SOB << I_V_CL)
#define I_ASMD (I_V_ASMD << I_V_CL)
#define I_DOP (I_V_DOP << I_V_CL)
#define I_CCC (I_V_CCC << I_V_CL)
#define I_CCS (I_V_CCS << I_V_CL)
#define I_SOPR (I_V_SOPR << I_V_CL)
static const int32 masks[] = {
0177777, 0177770, 0177700, 0177770,
0177700+I_D, 0177400+I_D, 0177700, 0177400,
0177400, 0177000, 0177000, 0177400,
0177400+I_D+I_L, 0170000, 0177777, 0177777,
0177000
};
static const char *opcode[] = {
"HALT","WAIT","RTI","BPT",
"IOT","RESET","RTT","MFPT",
"JMP","RTS","SPL",
"NOP","CLC","CLV","CLV CLC",
"CLZ","CLZ CLC","CLZ CLV","CLZ CLV CLC",
"CLN","CLN CLC","CLN CLV","CLN CLV CLC",
"CLN CLZ","CLN CLZ CLC","CLN CLZ CLC","CCC",
"NOP","SEC","SEV","SEV SEC",
"SEZ","SEZ SEC","SEZ SEV","SEZ SEV SEC",
"SEN","SEN SEC","SEN SEV","SEN SEV SEC",
"SEN SEZ","SEN SEZ SEC","SEN SEZ SEC","SCC",
"SWAB","BR","BNE","BEQ",
"BGE","BLT","BGT","BLE",
"JSR",
"CLR","COM","INC","DEC",
"NEG","ADC","SBC","TST",
"ROR","ROL","ASR","ASL",
"MARK","MFPI","MTPI","SXT",
"CSM", "TSTSET","WRTLCK",
"MOV","CMP","BIT","BIC",
"BIS","ADD",
"MUL","DIV","ASH","ASHC",
"XOR",
"FADD","FSUB","FMUL","FDIV",
"L2DR",
"MOVC","MOVRC","MOVTC",
"LOCC","SKPC","SCANC","SPANC",
"CMPC","MATC",
"ADDN","SUBN","CMPN","CVTNL",
"CVTPN","CVTNP","ASHN","CVTLN",
"L3DR",
"ADDP","SUBP","CMPP","CVTPL",
"MULP","DIVP","ASHP","CVTLP",
"MOVCI","MOVRCI","MOVTCI",
"LOCCI","SKPCI","SCANCI","SPANCI",
"CMPCI","MATCI",
"ADDNI","SUBNI","CMPNI","CVTNLI",
"CVTPNI","CVTNPI","ASHNI","CVTLNI",
"ADDPI","SUBPI","CMPPI","CVTPLI",
"MULPI","DIVPI","ASHPI","CVTLPI",
"SOB",
"BPL","BMI","BHI","BLOS",
"BVC","BVS","BCC","BCS",
"BHIS","BLO", /* encode only */
"EMT","TRAP",
"CLRB","COMB","INCB","DECB",
"NEGB","ADCB","SBCB","TSTB",
"RORB","ROLB","ASRB","ASLB",
"MTPS","MFPD","MTPD","MFPS",
"MOVB","CMPB","BITB","BICB",
"BISB","SUB",
"CFCC","SETF","SETI","SETD","SETL",
"LDFPS","STFPS","STST",
"CLRF","CLRD","TSTF","TSTD",
"ABSF","ABSD","NEGF","NEGD",
"MULF","MULD","MODF","MODD",
"ADDF","ADDD","LDF","LDD",
"SUBF","SUBD","CMPF","CMPD",
"STF","STD","DIVF","DIVD",
"STEXP",
"STCFI","STCDI","STCFL","STCDL",
"STCFD","STCDF",
"LDEXP",
"LDCIF","LDCID","LDCLF","LDCLD",
"LDCFD","LDCDF",
NULL
};
static const int32 opc_val[] = {
0000000+I_NPN, 0000001+I_NPN, 0000002+I_NPN, 0000003+I_NPN,
0000004+I_NPN, 0000005+I_NPN, 0000006+I_NPN, 0000007+I_NPN,
0000100+I_SOP, 0000200+I_REG, 0000230+I_3B,
0000240+I_CCC, 0000241+I_CCC, 0000242+I_CCC, 0000243+I_NPN,
0000244+I_CCC, 0000245+I_NPN, 0000246+I_NPN, 0000247+I_NPN,
0000250+I_CCC, 0000251+I_NPN, 0000252+I_NPN, 0000253+I_NPN,
0000254+I_NPN, 0000255+I_NPN, 0000256+I_NPN, 0000257+I_CCC,
0000260+I_CCS, 0000261+I_CCS, 0000262+I_CCS, 0000263+I_NPN,
0000264+I_CCS, 0000265+I_NPN, 0000266+I_NPN, 0000267+I_NPN,
0000270+I_CCS, 0000271+I_NPN, 0000272+I_NPN, 0000273+I_NPN,
0000274+I_NPN, 0000275+I_NPN, 0000276+I_NPN, 0000277+I_CCS,
0000300+I_SOP, 0000400+I_BR, 0001000+I_BR, 0001400+I_BR,
0002000+I_BR, 0002400+I_BR, 0003000+I_BR, 0003400+I_BR,
0004000+I_RSOP,
0005000+I_SOP, 0005100+I_SOP, 0005200+I_SOP, 0005300+I_SOP,
0005400+I_SOP, 0005500+I_SOP, 0005600+I_SOP, 0005700+I_SOP,
0006000+I_SOP, 0006100+I_SOP, 0006200+I_SOP, 0006300+I_SOP,
0006400+I_6B, 0006500+I_SOP, 0006600+I_SOP, 0006700+I_SOP,
0007000+I_SOP, 0007200+I_SOP, 0007300+I_SOP,
0010000+I_DOP, 0020000+I_DOP, 0030000+I_DOP, 0040000+I_DOP,
0050000+I_DOP, 0060000+I_DOP,
0070000+I_SOPR, 0071000+I_SOPR, 0072000+I_SOPR, 0073000+I_SOPR,
0074000+I_RSOP,
0075000+I_REG, 0075010+I_REG, 0075020+I_REG, 0075030+I_REG,
0076020+I_REG,
0076030+I_NPN, 0076031+I_NPN, 0076032+I_NPN,
0076040+I_NPN, 0076041+I_NPN, 0076042+I_NPN, 0076043+I_NPN,
0076044+I_NPN, 0076045+I_NPN,
0076050+I_NPN, 0076051+I_NPN, 0076052+I_NPN, 0076053+I_NPN,
0076054+I_NPN, 0076055+I_NPN, 0076056+I_NPN, 0076057+I_NPN,
0076060+I_REG,
0076070+I_NPN, 0076071+I_NPN, 0076072+I_NPN, 0076073+I_NPN,
0076074+I_NPN, 0076075+I_NPN, 0076076+I_NPN, 0076077+I_NPN,
0076130+I_NPN, 0076131+I_NPN, 0076132+I_NPN,
0076140+I_NPN, 0076141+I_NPN, 0076142+I_NPN, 0076143+I_NPN,
0076144+I_NPN, 0076145+I_NPN,
0076150+I_NPN, 0076151+I_NPN, 0076152+I_NPN, 0076153+I_NPN,
0076154+I_NPN, 0076155+I_NPN, 0076156+I_NPN, 0076157+I_NPN,
0076170+I_NPN, 0076171+I_NPN, 0076172+I_NPN, 0076173+I_NPN,
0076174+I_NPN, 0076175+I_NPN, 0076176+I_NPN, 0076177+I_NPN,
0077000+I_SOB,
0100000+I_BR, 0100400+I_BR, 0101000+I_BR, 0101400+I_BR,
0102000+I_BR, 0102400+I_BR, 0103000+I_BR, 0103400+I_BR,
0103000+I_BR, 0103400+I_BR,
0104000+I_8B, 0104400+I_8B,
0105000+I_SOP, 0105100+I_SOP, 0105200+I_SOP, 0105300+I_SOP,
0105400+I_SOP, 0105500+I_SOP, 0105600+I_SOP, 0105700+I_SOP,
0106000+I_SOP, 0106100+I_SOP, 0106200+I_SOP, 0106300+I_SOP,
0106400+I_SOP, 0106500+I_SOP, 0106600+I_SOP, 0106700+I_SOP,
0110000+I_DOP, 0120000+I_DOP, 0130000+I_DOP, 0140000+I_DOP,
0150000+I_DOP, 0160000+I_DOP,
0170000+I_NPN, 0170001+I_NPN, 0170002+I_NPN, 0170011+I_NPN, 0170012+I_NPN,
0170100+I_SOP, 0170200+I_SOP, 0170300+I_SOP,
0170400+I_FOP, 0170400+I_FOP+I_D, 0170500+I_FOP, 0170500+I_FOP+I_D,
0170600+I_FOP, 0170600+I_FOP+I_D, 0170700+I_FOP, 0170700+I_FOP+I_D,
0171000+I_AFOP, 0171000+I_AFOP+I_D, 0171400+I_AFOP, 0171400+I_AFOP+I_D,
0172000+I_AFOP, 0172000+I_AFOP+I_D, 0172400+I_AFOP, 0172400+I_AFOP+I_D,
0173000+I_AFOP, 0173000+I_AFOP+I_D, 0173400+I_AFOP, 0173400+I_AFOP+I_D,
0174000+I_AFOP, 0174000+I_AFOP+I_D, 0174400+I_AFOP, 0174400+I_AFOP+I_D,
0175000+I_ASOP,
0175400+I_ASMD, 0175400+I_ASMD+I_D, 0175400+I_ASMD+I_L, 0175400+I_ASMD+I_D+I_L,
0176000+I_AFOP, 0176000+I_AFOP+I_D,
0176400+I_ASOP,
0177000+I_ASMD, 0177000+I_ASMD+I_D, 0177000+I_ASMD+I_L, 0177000+I_ASMD+I_D+I_L,
0177400+I_AFOP, 0177400+I_AFOP+I_D,
-1
};
static const char *rname [] = {
"R0", "R1", "R2", "R3", "R4", "R5", "SP", "PC"
};
static const char *fname [] = {
"F0", "F1", "F2", "F3", "F4", "F5", "?6", "?7"
};
static const char r50_to_asc[] = " ABCDEFGHIJKLMNOPQRSTUVWXYZ$._0123456789";
/* Specifier decode
Inputs:
*of = output stream
addr = current PC
spec = specifier
nval = next word
flag = TRUE if decoding for CPU
iflag = TRUE if decoding integer instruction
Outputs:
count = -number of extra words retired
*/
/* Use scp.c provided fprintf function */
#define fprintf Fprintf
#define fputs(_s,f) Fprintf(f,"%s",_s)
#define fputc(_c,f) Fprintf(f,"%c",_c)
int32 fprint_spec (FILE *of, t_addr addr, int32 spec, t_value nval,
int32 flag, int32 iflag)
{
int32 reg, mode;
static const int32 rgwd[8] = { 0, 0, 0, 0, 0, 0, -1, -1 };
static const int32 pcwd[8] = { 0, 0, -1, -1, 0, 0, -1, -1 };
reg = spec & 07;
mode = ((spec >> 3) & 07);
switch (mode) {
case 0:
if (iflag)
fprintf (of, "%s", rname[reg]);
else fprintf (of, "%s", fname[reg]);
break;
case 1:
fprintf (of, "(%s)", rname[reg]);
break;
case 2:
if (reg != 7)
fprintf (of, "(%s)+", rname[reg]);
else fprintf (of, "#%-o", nval);
break;
case 3:
if (reg != 7)
fprintf (of, "@(%s)+", rname[reg]);
else fprintf (of, "@#%-o", nval);
break;
case 4:
fprintf (of, "-(%s)", rname[reg]);
break;
case 5:
fprintf (of, "@-(%s)", rname[reg]);
break;
case 6:
if ((reg != 7) || !flag)
fprintf (of, "%-o(%s)", nval, rname[reg]);
else fprintf (of, "%-o", (nval + addr + 4) & 0177777);
break;
case 7:
if ((reg != 7) || !flag)
fprintf (of, "@%-o(%s)", nval, rname[reg]);
else fprintf (of, "@%-o", (nval + addr + 4) & 0177777);
break;
} /* end case */
return ((reg == 07)? pcwd[mode]: rgwd[mode]);
}
/* Symbolic decode
Inputs:
*of = output stream
addr = current PC
*val = values to decode
*uptr = pointer to unit
sw = switches
Outputs:
return = if >= 0, error code
if < 0, number of extra words retired
*/
t_stat fprint_sym (FILE *of, t_addr addr, t_value *val,
UNIT *uptr, int32 sw)
{
int32 cflag, i, j, c1, c2, c3, inst, fac, srcm, srcr, dstm, dstr;
int32 bflag, l8b, brdisp, wd1, wd2;
extern int32 FPS;
bflag = 0; /* assume 16b */
cflag = (uptr == NULL) || (uptr == &cpu_unit); /* cpu? */
if (!cflag) { /* not cpu? */
DEVICE *dptr = find_dev_from_unit (uptr);
if (dptr == NULL)
return SCPE_IERR;
if (dptr->dwidth < 16)
bflag = 1;
}
if (sw & SWMASK ('A')) { /* ASCII? */
if (bflag)
c1 = val[0] & 0177;
else c1 = (val[0] >> ((addr & 1)? 8: 0)) & 0177;
fprintf (of, (c1 < 040)? "<%03o>": "%c", c1);
return 0;
}
if (sw & SWMASK ('B')) { /* byte? */
if (bflag)
c1 = val[0] & 0177;
else c1 = (val[0] >> ((addr & 1)? 8: 0)) & 0377;
fprintf (of, "%o", c1);
return 0;
}
if (bflag) /* 16b only */
return SCPE_ARG;
if (sw & SWMASK ('C')) { /* character? */
c1 = val[0] & 0177;
c2 = (val[0] >> 8) & 0177;
fprintf (of, (c1 < 040)? "<%03o>": "%c", c1);
fprintf (of, (c2 < 040)? "<%03o>": "%c", c2);
return -1;
}
if (sw & SWMASK ('R')) { /* radix 50? */
if (val[0] > 0174777) /* max value */
return SCPE_ARG;
c3 = val[0] % 050;
c2 = (val[0] / 050) % 050;
c1 = val[0] / (050 * 050);
fprintf (of, "%c%c%c", r50_to_asc[c1],
r50_to_asc[c2], r50_to_asc[c3]);
return -1;
}
if (!(sw & SWMASK ('M')))
return SCPE_ARG;
inst = val[0] | ((FPS << (I_V_L - FPS_V_L)) & I_L) |
((FPS << (I_V_D - FPS_V_D)) & I_D); /* inst + fp mode */
for (i = 0; opc_val[i] >= 0; i++) { /* loop thru ops */
j = (opc_val[i] >> I_V_CL) & I_M_CL; /* get class */
if ((opc_val[i] & 0777777) == (inst & masks[j])) { /* match? */
srcm = (inst >> 6) & 077; /* opr fields */
srcr = srcm & 07;
fac = srcm & 03;
dstm = inst & 077;
dstr = dstm & 07;
l8b = inst & 0377;
wd1 = wd2 = 0;
switch (j) { /* case on class */
case I_V_NPN: case I_V_CCC: case I_V_CCS: /* no operands */
fprintf (of, "%s", opcode[i]);
break;
case I_V_REG: /* reg */
fprintf (of, "%s %-s", opcode[i], rname[dstr]);
break;
case I_V_SOP: /* sop */
fprintf (of, "%s ", opcode[i]);
wd1 = fprint_spec (of, addr, dstm, val[1], cflag, TRUE);
break;
case I_V_3B: /* 3b */
fprintf (of, "%s %-o", opcode[i], dstr);
break;
case I_V_FOP: /* fop */
fprintf (of, "%s ", opcode[i]);
wd1 = fprint_spec (of, addr, dstm, val[1], cflag, FALSE);
break;
case I_V_AFOP: /* afop */
fprintf (of, "%s %s,", opcode[i], fname[fac]);
wd1 = fprint_spec (of, addr, dstm, val[1], cflag, FALSE);
break;
case I_V_6B: /* 6b */
fprintf (of, "%s %-o", opcode[i], dstm);
break;
case I_V_BR: /* cond branch */
fprintf (of, "%s ", opcode[i]);
brdisp = (l8b + l8b + ((l8b & 0200)? 0177002: 2)) & 0177777;
if (cflag)
fprintf (of, "%-o", (addr + brdisp) & 0177777);
else if (brdisp < 01000)
fprintf (of, ".+%-o", brdisp);
else fprintf (of, ".-%-o", 0200000 - brdisp);
break;
case I_V_8B: /* 8b */
fprintf (of, "%s %-o", opcode[i], l8b);
break;
case I_V_SOB: /* sob */
fprintf (of, "%s %s,", opcode[i], rname[srcr]);
brdisp = (dstm * 2) - 2;
if (cflag)
fprintf (of, "%-o", (addr - brdisp) & 0177777);
else if (brdisp <= 0)
fprintf (of, ".+%-o", -brdisp);
else fprintf (of, ".-%-o", brdisp);
break;
case I_V_RSOP: /* rsop */
fprintf (of, "%s %s,", opcode[i], rname[srcr]);
wd1 = fprint_spec (of, addr, dstm, val[1], cflag, TRUE);
break;
case I_V_SOPR: /* sopr */
fprintf (of, "%s ", opcode[i]);
wd1 = fprint_spec (of, addr, dstm, val[1], cflag, TRUE);
fprintf (of, ",%s", rname[srcr]);
break;
case I_V_ASOP: case I_V_ASMD: /* asop, asmd */
fprintf (of, "%s %s,", opcode[i], fname[fac]);
wd1 = fprint_spec (of, addr, dstm, val[1], cflag, TRUE);
break;
case I_V_DOP: /* dop */
fprintf (of, "%s ", opcode[i]);
wd1 = fprint_spec (of, addr, srcm, val[1], cflag, TRUE);
fprintf (of, ",");
wd2 = fprint_spec (of, addr - wd1 - wd1, dstm,
val[1 - wd1], cflag, TRUE);
break;
} /* end case */
return ((wd1 + wd2) * 2) - 1;
} /* end if */
} /* end for */
return SCPE_ARG; /* no match */
}
#define A_PND 100 /* # seen */
#define A_MIN 040 /* -( seen */
#define A_PAR 020 /* (Rn) seen */
#define A_REG 010 /* Rn seen */
#define A_PLS 004 /* + seen */
#define A_NUM 002 /* number seen */
#define A_REL 001 /* relative addr seen */
/* Register number
Inputs:
*cptr = pointer to input string
*strings = pointer to register names
mchar = character to match after register name
Outputs:
rnum = 0..7 if a legitimate register
< 0 if error
*/
int32 get_reg (char *cptr, const char *strings[], char mchar)
{
int32 i;
if (*(cptr + 2) != mchar)
return -1;
for (i = 0; i < 8; i++) {
if (strncmp (cptr, strings[i], 2) == 0)
return i;
}
return -1;
}
/* Number or memory address
Inputs:
*cptr = pointer to input string
*dptr = pointer to output displacement
*pflag = pointer to accumulating flags
Outputs:
cptr = pointer to next character in input string
NULL if parsing error
Flags: 0 (no result), A_NUM (number), A_REL (relative)
*/
char *get_addr (char *cptr, int32 *dptr, int32 *pflag)
{
int32 val, minus;
char *tptr;
minus = 0;
if (*cptr == '.') { /* relative? */
*pflag = *pflag | A_REL;
cptr++;
}
if (*cptr == '+') { /* +? */
*pflag = *pflag | A_NUM;
cptr++;
}
if (*cptr == '-') { /* -? */
*pflag = *pflag | A_NUM;
minus = 1;
cptr++;
}
errno = 0;
val = strtoul (cptr, &tptr, 8);
if (cptr == tptr) { /* no number? */
if (*pflag == (A_REL + A_NUM)) /* .+, .-? */
return NULL;
*dptr = 0;
return cptr;
}
if (errno || (*pflag == A_REL)) /* .n? */
return NULL;
*dptr = (minus? -val: val) & 0177777;
*pflag = *pflag | A_NUM;
return tptr;
}
/* Specifier decode
Inputs:
*cptr = pointer to input string
addr = current PC
n1 = 0 if no extra word used
-1 if extra word used in prior decode
*sptr = pointer to output specifier
*dptr = pointer to output displacement
cflag = true if parsing for the CPU
iflag = true if integer specifier
Outputs:
status = = -1 extra word decoded
= 0 ok
= +1 error
*/
t_stat get_spec (char *cptr, t_addr addr, int32 n1, int32 *sptr, t_value *dptr,
int32 cflag, int32 iflag)
{
int32 reg, indir, pflag, disp = 0;
indir = 0; /* no indirect */
pflag = 0;
if (*cptr == '@') { /* indirect? */
indir = 010;
cptr++;
}
if (*cptr == '#') { /* literal? */
pflag = pflag | A_PND;
cptr++;
}
if (strncmp (cptr, "-(", 2) == 0) { /* autodecrement? */
pflag = pflag | A_MIN;
cptr++;
}
else if ((cptr = get_addr (cptr, &disp, &pflag)) == NULL)
return 1;
if (*cptr == '(') { /* register index? */
pflag = pflag | A_PAR;
if ((reg = get_reg (cptr + 1, rname, ')')) < 0)
return 1;
cptr = cptr + 4;
if (*cptr == '+') { /* autoincrement? */
pflag = pflag | A_PLS;
cptr++;
}
}
else if ((reg = get_reg (cptr, iflag? rname: fname, 0)) >= 0) {
pflag = pflag | A_REG;
cptr = cptr + 2;
}
if (*cptr != 0) /* all done? */
return 1;
switch (pflag) { /* case on syntax */
case A_REG: /* Rn, @Rn */
*sptr = indir + reg;
return 0;
case A_PAR: /* (Rn), @(Rn) */
if (indir) { /* @(Rn) = @0(Rn) */
*sptr = 070 + reg;
*dptr = 0;
return -1;
}
else *sptr = 010 + reg;
return 0;
case A_PAR+A_PLS: /* (Rn)+, @(Rn)+ */
*sptr = 020 + indir + reg;
return 0;
case A_MIN+A_PAR: /* -(Rn), @-(Rn) */
*sptr = 040 + indir + reg;
return 0;
case A_NUM+A_PAR: /* d(Rn), @d(Rn) */
*sptr = 060 + indir + reg;
*dptr = disp;
return -1;
case A_PND+A_REL: case A_PND+A_REL+A_NUM: /* #.+n, @#.+n */
if (!cflag)
return 1;
disp = (disp + addr) & 0177777; /* fall through */
case A_PND+A_NUM: /* #n, @#n */
*sptr = 027 + indir;
*dptr = disp;
return -1;
case A_REL: case A_REL+A_NUM: /* .+n, @.+n */
*sptr = 067 + indir;
*dptr = (disp - 4 + (2 * n1)) & 0177777;
return -1;
case A_NUM: /* n, @n */
if (cflag) { /* CPU - use rel */
*sptr = 067 + indir;
*dptr = (disp - addr - 4 + (2 * n1)) & 0177777;
}
else {
if (indir) return 1; /* other - use abs */
*sptr = 037;
*dptr = disp;
}
return -1;
default:
return 1;
} /* end case */
}
/* Symbolic input
Inputs:
*cptr = pointer to input string
addr = current PC
*uptr = pointer to unit
*val = pointer to output values
sw = switches
Outputs:
status = > 0 error code
<= 0 -number of extra words
*/
t_stat parse_sym (char *cptr, t_addr addr, UNIT *uptr, t_value *val, int32 sw)
{
int32 bflag, cflag, d, i, j, reg, spec, n1, n2, disp, pflag;
t_value by;
t_stat r;
char *tptr, gbuf[CBUFSIZE];
bflag = 0; /* assume 16b */
cflag = (uptr == NULL) || (uptr == &cpu_unit); /* cpu? */
if (!cflag) { /* not cpu? */
DEVICE *dptr = find_dev_from_unit (uptr);
if (dptr == NULL)
return SCPE_IERR;
if (dptr->dwidth < 16)
bflag = 1;
}
while (isspace (*cptr)) cptr++; /* absorb spaces */
if ((sw & SWMASK ('A')) || ((*cptr == '\'') && cptr++)) { /* ASCII char? */
if (cptr[0] == 0) /* must have 1 char */
return SCPE_ARG;
if (bflag)
val[0] = (t_value) cptr[0];
else val[0] = (addr & 1)?
(val[0] & 0377) | (((t_value) cptr[0]) << 8):
(val[0] & ~0377) | ((t_value) cptr[0]);
return 0;
}
if (sw & SWMASK ('B')) { /* byte? */
by = get_uint (cptr, 8, 0377, &r); /* get byte */
if (r != SCPE_OK)
return SCPE_ARG;
if (bflag)
val[0] = by;
else val[0] = (addr & 1)?
(val[0] & 0377) | (by << 8):
(val[0] & ~0377) | by;
return 0;
}
if (bflag)
return SCPE_ARG;
if ((sw & SWMASK ('C')) || ((*cptr == '"') && cptr++)) { /* ASCII string? */
if (cptr[0] == 0) /* must have 1 char */
return SCPE_ARG;
val[0] = ((t_value) cptr[1] << 8) | (t_value) cptr[0];
return -1;
}
if (sw & SWMASK ('R')) /* radix 50 */
return SCPE_ARG;
cptr = get_glyph (cptr, gbuf, 0); /* get opcode */
n1 = n2 = pflag = 0;
for (i = 0; (opcode[i] != NULL) && (strcmp (opcode[i], gbuf) != 0) ; i++) ;
if (opcode[i] == NULL)
return SCPE_ARG;
val[0] = opc_val[i] & 0177777; /* get value */
j = (opc_val[i] >> I_V_CL) & I_M_CL; /* get class */
switch (j) { /* case on class */
case I_V_NPN: /* no operand */
break;
case I_V_REG: /* register */
cptr = get_glyph (cptr, gbuf, 0); /* get glyph */
if ((reg = get_reg (gbuf, rname, 0)) < 0)
return SCPE_ARG;
val[0] = val[0] | reg;
break;