| /* gri_sys.c: GRI-909 simulator interface | |
| Copyright (c) 2001-2008, 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. | |
| 14-Jan-08 RMS Added GRI-99 support | |
| 18-Oct-02 RMS Fixed bug in symbolic decode (found by Hans Pufal) | |
| */ | |
| #include "gri_defs.h" | |
| #include <ctype.h> | |
| extern DEVICE cpu_dev; | |
| extern UNIT cpu_unit; | |
| extern DEVICE tti_dev, tto_dev; | |
| extern DEVICE hsr_dev, hsp_dev; | |
| extern DEVICE rtc_dev; | |
| extern REG cpu_reg[]; | |
| extern uint16 M[]; | |
| extern int32 sim_switches; | |
| void fprint_addr (FILE *of, uint32 val, uint32 mod, uint32 dst); | |
| /* SCP data structures and interface routines | |
| sim_name simulator name string | |
| sim_PC pointer to saved PC register descriptor | |
| sim_emax maximum number of words for examine/deposit | |
| sim_devices array of pointers to simulated devices | |
| sim_stop_messages array of pointers to stop messages | |
| sim_load binary loader | |
| */ | |
| char sim_name[] = "GRI-909"; | |
| REG *sim_PC = &cpu_reg[0]; | |
| int32 sim_emax = 2; | |
| DEVICE *sim_devices[] = { | |
| &cpu_dev, | |
| &tti_dev, | |
| &tto_dev, | |
| &hsr_dev, | |
| &hsp_dev, | |
| &rtc_dev, | |
| NULL | |
| }; | |
| const char *sim_stop_messages[] = { | |
| "Unknown error", | |
| "Unimplemented unit", | |
| "HALT instruction", | |
| "Breakpoint", | |
| "Invalid interrupt request" | |
| }; | |
| /* Binary loader | |
| Bootstrap loader format consists of blocks separated by zeroes. Each | |
| word in the block has three frames: a control frame (ignored) and two | |
| data frames. The user must specify the load address. Switch -c means | |
| continue and load all blocks until end of tape. | |
| */ | |
| t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag) | |
| { | |
| int32 c; | |
| uint32 org; | |
| t_stat r; | |
| char gbuf[CBUFSIZE]; | |
| if (*cptr != 0) { /* more input? */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get origin */ | |
| org = get_uint (gbuf, 8, AMASK, &r); | |
| if (r != SCPE_OK) | |
| return r; | |
| if (*cptr != 0) /* no more */ | |
| return SCPE_ARG; | |
| } | |
| else org = 0200; /* default 200 */ | |
| for (;;) { /* until EOF */ | |
| while ((c = getc (fileref)) == 0) ; /* skip starting 0's */ | |
| if (c == EOF) /* EOF? done */ | |
| break; | |
| for ( ; c != 0; ) { /* loop until ctl = 0 */ | |
| /* ign ctrl frame */ | |
| if ((c = getc (fileref)) == EOF) /* get high byte */ | |
| return SCPE_FMT; /* EOF is error */ | |
| if (!MEM_ADDR_OK (org)) | |
| return SCPE_NXM; | |
| M[org] = ((c & 0377) << 8); /* store high */ | |
| if ((c = getc (fileref)) == EOF) /* get low byte */ | |
| return SCPE_FMT; /* EOF is error */ | |
| M[org] = M[org] | (c & 0377); /* store low */ | |
| org = org + 1; /* incr origin */ | |
| if ((c = getc (fileref)) == EOF) /* get ctrl frame */ | |
| return SCPE_OK; /* EOF is ok */ | |
| } /* end block for */ | |
| if (!(sim_switches & SWMASK ('C'))) | |
| return SCPE_OK; | |
| } /* end tape for */ | |
| return SCPE_OK; | |
| } | |
| /* Symbol tables */ | |
| #define F_V_FL 16 /* class flag */ | |
| #define F_M_FL 017 | |
| #define F_V_FO 000 /* function out */ | |
| #define F_V_FOI 001 /* FO, impl reg */ | |
| #define F_V_SF 002 /* skip function */ | |
| #define F_V_SFI 003 /* SF, impl reg */ | |
| #define F_V_RR 004 /* reg reg */ | |
| #define F_V_ZR 005 /* zero reg */ | |
| #define F_V_RS 006 /* reg self */ | |
| #define F_V_JC 010 /* jump cond */ | |
| #define F_V_JU 011 /* jump uncond */ | |
| #define F_V_RM 012 /* reg mem */ | |
| #define F_V_ZM 013 /* zero mem */ | |
| #define F_V_MR 014 /* mem reg */ | |
| #define F_V_MS 015 /* mem self */ | |
| #define F_2WD 010 /* 2 words */ | |
| #define F_FO (F_V_FO << F_V_FL) | |
| #define F_FOI (F_V_FOI << F_V_FL) | |
| #define F_SF (F_V_SF << F_V_FL) | |
| #define F_SFI (F_V_SFI << F_V_FL) | |
| #define F_RR (F_V_RR << F_V_FL) | |
| #define F_ZR (F_V_ZR << F_V_FL) | |
| #define F_RS (F_V_RS << F_V_FL) | |
| #define F_JC (F_V_JC << F_V_FL) | |
| #define F_JU (F_V_JU << F_V_FL) | |
| #define F_RM (F_V_RM << F_V_FL) | |
| #define F_ZM (F_V_ZM << F_V_FL) | |
| #define F_MR (F_V_MR << F_V_FL) | |
| #define F_MS (F_V_MS << F_V_FL) | |
| struct fnc_op { | |
| uint32 inst; /* instr prot */ | |
| uint32 imask; /* instr mask */ | |
| uint32 oper; /* operator */ | |
| uint32 omask; /* oper mask */ | |
| }; | |
| static const int32 masks[] = { | |
| 0176000, 0176077, 0000077, 0176077, | |
| 0000300, 0176300, 0000300, 0177777, | |
| 0000077, 0177777, 0000377, 0176377, | |
| 0176300, 0176377 | |
| }; | |
| /* Instruction mnemonics | |
| Order is critical, as some instructions are more precise versions of | |
| others. For example, JU must precede JC, otherwise, JU will be decoded | |
| as JC 0,ETZ,dst. There are some ambiguities, eg, what is 02-xxxx-06? | |
| Priority is as follows: | |
| FO (02-xxxx-rr) | |
| SF (rr-xxxx-02) | |
| MR (06-xxxx-rr) | |
| RM (rr-xxxx-06) | |
| JC (rr-xxxx-03) | |
| RR | |
| */ | |
| static const char *opcode[] = { | |
| "FOM", "FOA", "FOI", "FO", /* FOx before FO */ | |
| "SFM", "SFA", "SFI", "SF", /* SFx before SF */ | |
| "ZM", "ZMD", "ZMI", "ZMID", /* ZM before RM */ | |
| "MS", "MSD", "MSI", "MSID", | |
| "RM", "RMD", "RMI", "RMID", | |
| "MR", "MRD", "MRI", "MRID", | |
| "JO", "JOD", "JN", "JND", /* JU before JC */ | |
| "JU", "JUD", "JC", "JCD", | |
| "ZR", "ZRC", "RR", "RRC", /* ZR before RR */ | |
| "RS", "RSC", | |
| NULL | |
| }; | |
| static const uint32 opc_val[] = { | |
| 0004000+F_FOI, 0004013+F_FOI, 0004004+F_FOI, 0004000+F_FO, | |
| 0000002+F_SFI, 0026002+F_SFI, 0010002+F_SFI, 0000002+F_SF, | |
| 0000006+F_ZM, 0000106+F_ZM, 0000206+F_ZM, 0000306+F_ZM, | |
| 0014006+F_MS, 0014106+F_MS, 0014206+F_MS, 0014306+F_MS, | |
| 0000006+F_RM, 0000106+F_RM, 0000206+F_RM, 0000306+F_RM, | |
| 0014000+F_MR, 0014100+F_MR, 0014200+F_MR, 0014300+F_MR, | |
| 0037003+F_JU, 0037103+F_JU, 0037203+F_JU, 0037303+F_JU, | |
| 0000403+F_JU, 0000503+F_JU, 0000003+F_JC, 0000103+F_JC, | |
| 0000000+F_ZR, 0000200+F_ZR, 0000000+F_RR, 0000200+F_RR, | |
| 0000000+F_RS, 0000200+F_RS | |
| }; | |
| /* Unit mnemonics. All 64 units are decoded, most just to octal integers */ | |
| static const char *unsrc[64] = { | |
| "0", "IR", "2", "TRP", "ISR", "MA", "MB", "SC", /* 00 - 07 */ | |
| "SWR", "AX", "AY", "AO", "14", "15", "16", "MSR", /* 10 - 17 */ | |
| "20", "21", "XR", "ATRP", "BSW", "BPK", "BCPA", "BCPB",/* 20 - 27 */ | |
| "GR1", "GR2", "GR3", "GR4", "GR5", "GR6", "36", "37", /* 30 - 37 */ | |
| "40", "41", "42", "43", "44", "45", "46", "47", | |
| "50", "51", "52", "53", "54", "CDR", "56", "CADR", | |
| "60", "61", "62", "63", "64", "65", "DWC", "DCA", | |
| "DISK", "LPR", "72", "73", "CAS", "RTC", "HSR", "TTI" /* 70 - 77 */ | |
| }; | |
| static const char *undst[64] = { | |
| "0", "IR", "2", "TRP", "ISR", "5", "MB", "SC", /* 00 - 07 */ | |
| "SWR", "AX", "AY", "13", "EAO", "15", "16", "MSR", /* 10 - 17 */ | |
| "20", "21", "XR", "ATRP", "BSW", "BPK", "BCPA", "BCPB",/* 20 - 27 */ | |
| "GR1", "GR2", "GR3", "GR4", "GR5", "GR6", "36", "37", /* 30 - 37 */ | |
| "40", "41", "42", "43", "44", "45", "46", "47", | |
| "50", "51", "52", "53", "54", "CDR", "56", "CADR", | |
| "60", "61", "62", "63", "64", "65", "DWC", "DCA", | |
| "DISK", "LPR", "72", "73", "CAS", "RTC", "HSP", "TTO" /* 70 - 77 */ | |
| }; | |
| /* Operators */ | |
| static const char *opname[4] = { | |
| NULL, "P1", "L1", "R1" | |
| }; | |
| /* Conditions */ | |
| static const char *cdname[8] = { | |
| "NEVER", "ALWAYS", "ETZ", "NEZ", "LTZ", "GEZ", "LEZ", "GTZ" | |
| }; | |
| /* Function out/sense function */ | |
| static const char *fname[] = { | |
| "NOT", /* any SF */ | |
| "POK", "LNK", "BOV", /* SFM */ | |
| "SOV", "AOV", /* SFA */ | |
| "IRDY", "ORDY", /* any SF */ | |
| "CLL", "STL", "CML", "HLT", /* FOM */ | |
| "ICF", "ICO", /* FOI */ | |
| "ADD", "AND", "XOR", "OR", /* FOA */ | |
| "INP", "IRDY", "ORDY", "STRT", /* any FO */ | |
| NULL | |
| }; | |
| static const struct fnc_op fop[] = { | |
| { 0000002, 0000077, 001, 001 }, /* NOT */ | |
| { 0000002, 0176077, 010, 010 }, /* POK */ | |
| { 0000002, 0176077, 004, 004 }, /* LNK */ | |
| { 0000002, 0176077, 002, 002 }, /* BOV */ | |
| { 0026002, 0176077, 004, 004 }, /* SOV */ | |
| { 0026002, 0176077, 002, 002 }, /* AOV */ | |
| { 0000002, 0000077, 010, 010 }, /* IRDY */ | |
| { 0000002, 0000077, 002, 002 }, /* ORDY */ | |
| { 0004000, 0176077, 001, 003 }, /* CLL */ | |
| { 0004000, 0176077, 002, 003 }, /* STL */ | |
| { 0004000, 0176077, 003, 003 }, /* CML */ | |
| { 0004000, 0176077, 004, 004 }, /* HLT */ | |
| { 0004004, 0176077, 001, 001 }, /* ICF */ | |
| { 0004004, 0176077, 002, 002 }, /* ICO */ | |
| { 0004013, 0176077, 000, 014 }, /* ADD */ | |
| { 0004013, 0176077, 004, 014 }, /* AND */ | |
| { 0004013, 0176077, 010, 014 }, /* XOR */ | |
| { 0004013, 0176077, 014, 014 }, /* OR */ | |
| { 0004000, 0176000, 011, 011 }, /* INP */ | |
| { 0004000, 0176000, 010, 010 }, /* IRDY */ | |
| { 0004000, 0176000, 002, 002 }, /* ORDY */ | |
| { 0004000, 0176000, 001, 001 } /* STRT */ | |
| }; | |
| /* Print opcode field for FO, SF */ | |
| void fprint_op (FILE *of, uint32 inst, uint32 op) | |
| { | |
| int32 i, nfirst; | |
| for (i = nfirst = 0; fname[i] != NULL; i++) { | |
| if (((inst & fop[i].imask) == fop[i].inst) && | |
| ((op & fop[i].omask) == fop[i].oper)) { | |
| op = op & ~fop[i].omask; | |
| if (nfirst) | |
| fputc (' ', of); | |
| nfirst = 1; | |
| fprintf (of, "%s", fname[i]); | |
| } | |
| } | |
| if (op) | |
| fprintf (of, " %o", op); | |
| return; | |
| } | |
| /* Print address field with potential indexing */ | |
| void fprint_addr (FILE *of, uint32 val, uint32 mode, uint32 dst) | |
| { | |
| if ((val & INDEX) && | |
| ((dst == U_SC) || (mode != MEM_IMM))) | |
| fprintf (of, "#%o", val & AMASK); | |
| else fprintf (of, "%o", val); | |
| return; | |
| } | |
| /* Symbolic decode | |
| Inputs: | |
| *of = output stream | |
| addr = current PC | |
| *val = pointer to data | |
| *uptr = pointer to unit | |
| sw = switches | |
| Outputs: | |
| return = status code | |
| */ | |
| #define FMTASC(x) ((x) < 040)? "<%03o>": "%c", (x) | |
| t_stat fprint_sym (FILE *of, t_addr addr, t_value *val, | |
| UNIT *uptr, int32 sw) | |
| { | |
| int32 i, j; | |
| uint32 inst, src, dst, op, bop; | |
| inst = val[0]; | |
| if (sw & SWMASK ('A')) { /* ASCII? */ | |
| if (inst > 0377) | |
| return SCPE_ARG; | |
| fprintf (of, FMTASC (inst & 0177)); | |
| return SCPE_OK; | |
| } | |
| if (sw & SWMASK ('C')) { /* characters? */ | |
| fprintf (of, FMTASC ((inst >> 8) & 0177)); | |
| fprintf (of, FMTASC (inst & 0177)); | |
| return SCPE_OK; | |
| } | |
| if (!(sw & SWMASK ('M'))) | |
| return SCPE_ARG; | |
| /* Instruction decode */ | |
| inst = val[0]; | |
| src = I_GETSRC (inst); /* get fields */ | |
| op = I_GETOP (inst); | |
| dst = I_GETDST (inst); | |
| bop = op >> 2; /* bus op */ | |
| for (i = 0; opcode[i] != NULL; i++) { /* loop thru ops */ | |
| j = (opc_val[i] >> F_V_FL) & F_M_FL; /* get class */ | |
| if ((opc_val[i] & DMASK) == (inst & masks[j])) { /* match? */ | |
| switch (j) { /* case on class */ | |
| case F_V_FO: /* func out */ | |
| fprintf (of, "%s ", opcode[i]); | |
| fprint_op (of, inst, op); | |
| fprintf (of, ",%s", undst[dst]); | |
| break; | |
| case F_V_FOI: /* func out impl */ | |
| fprintf (of, "%s ", opcode[i]); | |
| fprint_op (of, inst, op); | |
| break; | |
| case F_V_SF: /* skip func */ | |
| fprintf (of, "%s %s,", opcode[i], unsrc[src]); | |
| fprint_op (of, inst, op); | |
| break; | |
| case F_V_SFI: /* skip func impl */ | |
| fprintf (of, "%s ", opcode[i]); | |
| fprint_op (of, inst, op); | |
| break; | |
| case F_V_RR: /* reg reg */ | |
| if (strcmp (unsrc[src], undst[dst]) == 0) { | |
| if (bop) | |
| fprintf (of, "%s %s,%s", opcode[i + 2], | |
| unsrc[src], opname[bop]); | |
| else fprintf (of, "%s %s", opcode[i + 2], unsrc[src]); | |
| } | |
| else { | |
| if (bop) | |
| fprintf (of, "%s %s,%s,%s", opcode[i], | |
| unsrc[src], opname[bop], undst[dst]); | |
| else fprintf (of, "%s %s,%s", opcode[i], | |
| unsrc[src], undst[dst]); | |
| } | |
| break; | |
| case F_V_ZR: /* zero reg */ | |
| if (bop) | |
| fprintf (of, "%s %s,%s", opcode[i], | |
| opname[bop], undst[dst]); | |
| else fprintf (of, "%s %s", opcode[i], undst[dst]); | |
| break; | |
| case F_V_JC: /* jump cond */ | |
| fprintf (of, "%s %s,%s,", | |
| opcode[i], unsrc[src], cdname[op >> 1]); | |
| fprint_addr (of, val[1], 0, U_SC); | |
| break; | |
| case F_V_JU: /* jump uncond */ | |
| fprintf (of, "%s ", opcode[i]); | |
| fprint_addr (of, val[1], 0, U_SC); | |
| break; | |
| case F_V_RM: /* reg mem */ | |
| if (bop) | |
| fprintf (of, "%s %s,%s,", | |
| opcode[i], unsrc[src], opname[bop]); | |
| else fprintf (of, "%s %s,", opcode[i], unsrc[src]); | |
| fprint_addr (of, val[1], op & MEM_MOD, dst); | |
| break; | |
| case F_V_ZM: /* zero mem */ | |
| if (bop) | |
| fprintf (of, "%s %s,", opcode[i], opname[bop]); | |
| else fprintf (of, "%s ", opcode[i]); | |
| fprint_addr (of, val[1], op & MEM_MOD, dst); | |
| break; | |
| case F_V_MR: /* mem reg */ | |
| fprintf (of, "%s ", opcode[i]); | |
| fprint_addr (of, val[1], op & MEM_MOD, dst); | |
| if (bop) | |
| fprintf (of, ",%s,%s", opname[bop], undst[dst]); | |
| else fprintf (of, ",%s", undst[dst]); | |
| break; | |
| case F_V_MS: /* mem self */ | |
| fprintf (of, "%s ", opcode[i]); | |
| fprint_addr (of, val[1], op & MEM_MOD, dst); | |
| if (bop) | |
| fprintf (of, ",%s", opname[bop]); | |
| break; | |
| } /* end case */ | |
| return (j >= F_2WD)? -1: SCPE_OK; | |
| } /* end if */ | |
| } /* end for */ | |
| return SCPE_ARG; | |
| } | |
| /* Field parse routines | |
| get_fnc get function field | |
| get_ma get memory address | |
| get_sd get source or dest | |
| get_op get optional bus operator | |
| */ | |
| char *get_fnc (char *cptr, t_value *val) | |
| { | |
| char gbuf[CBUFSIZE]; | |
| int32 i; | |
| t_value d; | |
| t_stat r; | |
| uint32 inst = val[0]; | |
| uint32 fncv = 0, fncm = 0; | |
| while (*cptr) { | |
| cptr = get_glyph (cptr, gbuf, 0); /* get glyph */ | |
| d = get_uint (gbuf, 8, 017, &r); /* octal? */ | |
| if (r == SCPE_OK) { /* ok? */ | |
| if (d & fncm) /* already filled? */ | |
| return NULL; | |
| fncv = fncv | d; /* save */ | |
| fncm = fncm | d; /* field filled */ | |
| } | |
| else { /* symbol? */ | |
| for (i = 0; fname[i] != NULL; i++) { /* search table */ | |
| if ((strcmp (gbuf, fname[i]) == 0) && /* match for inst? */ | |
| ((inst & fop[i].imask) == fop[i].inst)) { | |
| if (fop[i].oper & fncm) /* already filled? */ | |
| return NULL; | |
| fncm = fncm | fop[i].omask; | |
| fncv = fncv | fop[i].oper; | |
| break; | |
| } | |
| } | |
| if (fname[i] == NULL) | |
| return NULL; | |
| } /* end else */ | |
| } /* end while */ | |
| val[0] = val[0] | (fncv << I_V_OP); /* store fnc */ | |
| return cptr; | |
| } | |
| char *get_ma (char *cptr, t_value *val, char term) | |
| { | |
| char gbuf[CBUFSIZE]; | |
| t_value d; | |
| t_stat r; | |
| cptr = get_glyph (cptr, gbuf, term); /* get glyph */ | |
| if (gbuf[0] == '#') /* indexed? */ | |
| d = get_uint (gbuf + 1, 8, AMASK, &r) | INDEX; /* [0, 77777] */ | |
| else d = get_uint (gbuf, 8, DMASK, &r); /* [0,177777] */ | |
| if (r != SCPE_OK) | |
| return NULL; | |
| val[1] = d; /* second wd */ | |
| return cptr; | |
| } | |
| char *get_sd (char *cptr, t_value *val, char term, t_bool src) | |
| { | |
| char gbuf[CBUFSIZE]; | |
| int32 d; | |
| t_stat r; | |
| cptr = get_glyph (cptr, gbuf, term); /* get glyph */ | |
| for (d = 0; d < 64; d++) { /* symbol match? */ | |
| if ((strcmp (gbuf, unsrc[d]) == 0) || | |
| (strcmp (gbuf, undst[d]) == 0)) | |
| break; | |
| } | |
| if (d >= 64) { /* no, [0,63]? */ | |
| d = get_uint (gbuf, 8, 077, &r); | |
| if (r != SCPE_OK) | |
| return NULL; | |
| } | |
| val[0] = val[0] | (d << (src? I_V_SRC: I_V_DST)); /* or to inst */ | |
| return cptr; | |
| } | |
| char *get_op (char *cptr, t_value *val, char term) | |
| { | |
| char gbuf[CBUFSIZE], *tptr; | |
| int32 i; | |
| tptr = get_glyph (cptr, gbuf, term); /* get glyph */ | |
| for (i = 1; i < 4; i++) { /* symbol match? */ | |
| if (strcmp (gbuf, opname[i]) == 0) { | |
| val[0] = val[0] | (i << (I_V_OP + 2)); /* or to inst */ | |
| return tptr; | |
| } | |
| } | |
| return cptr; /* original ptr */ | |
| } | |
| /* Symbolic input | |
| Inputs: | |
| *cptr = pointer to input string | |
| addr = current PC | |
| *uptr = pointer to unit | |
| *val = pointer to output values | |
| sw = switches | |
| Outputs: | |
| status = error status | |
| */ | |
| t_stat parse_sym (char *cptr, t_addr addr, UNIT *uptr, t_value *val, int32 sw) | |
| { | |
| int32 i, j, k; | |
| char *tptr, gbuf[CBUFSIZE]; | |
| 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; | |
| val[0] = (t_value) cptr[0] & 0177; | |
| return SCPE_OK; | |
| } | |
| if ((sw & SWMASK ('C')) || ((*cptr == '"') && cptr++)) { /* char string? */ | |
| if (cptr[0] == 0) /* must have 1 char */ | |
| return SCPE_ARG; | |
| val[0] = (((t_value) cptr[0] & 0177) << 8) | ((t_value) cptr[1] & 0177); | |
| return SCPE_OK; | |
| } | |
| /* Instruction parse */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get opcode */ | |
| for (i = 0; (opcode[i] != NULL) && (strcmp (opcode[i], gbuf) != 0) ; i++) ; | |
| if (opcode[i] == NULL) | |
| return SCPE_ARG; | |
| val[0] = opc_val[i] & DMASK; /* get value */ | |
| j = (opc_val[i] >> F_V_FL) & F_M_FL; /* get class */ | |
| switch (j) { /* case on class */ | |
| case F_V_FO: /* func out */ | |
| tptr = strchr (cptr, ','); /* find dst */ | |
| if (!tptr) /* none? */ | |
| return SCPE_ARG; | |
| *tptr = 0; /* split fields */ | |
| cptr = get_fnc (cptr, val); /* fo # */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_sd (tptr + 1, val, 0, FALSE); /* dst */ | |
| break; | |
| case F_V_FOI: /* func out impl */ | |
| cptr = get_fnc (cptr, val); /* fo # */ | |
| break; | |
| case F_V_SF: /* skip func */ | |
| cptr = get_sd (cptr, val, ',', TRUE); /* src */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| case F_V_SFI: /* skip func impl */ | |
| cptr = get_fnc (cptr, val); /* fo # */ | |
| break; | |
| case F_V_RR: /* reg-reg */ | |
| cptr = get_sd (cptr, val, ',', TRUE); /* src */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_op (cptr, val, ','); /* op */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_sd (cptr, val, 0, FALSE); /* dst */ | |
| break; | |
| case F_V_ZR: /* zero-reg */ | |
| cptr = get_op (cptr, val, ','); /* op */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_sd (cptr, val, 0, FALSE); /* dst */ | |
| break; | |
| case F_V_RS: /* reg self */ | |
| cptr = get_sd (cptr, val, ',', TRUE); /* src */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| val[0] = val[0] | I_GETSRC (val[0]); /* duplicate */ | |
| cptr = get_op (cptr, val, 0); /* op */ | |
| break; | |
| case F_V_JC: /* jump cond */ | |
| cptr = get_sd (cptr, val, ',', TRUE); /* src */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_glyph (cptr, gbuf, ','); /* cond */ | |
| for (k = 0; k < 8; k++) { /* symbol? */ | |
| if (strcmp (gbuf, cdname[k]) == 0) | |
| break; | |
| } | |
| if (k >= 8) | |
| return SCPE_ARG; | |
| val[0] = val[0] | (k << (I_V_OP + 1)); /* or to inst */ | |
| case F_V_JU: /* jump uncond */ | |
| cptr = get_ma (cptr, val, 0); /* addr */ | |
| break; | |
| case F_V_RM: /* reg mem */ | |
| cptr = get_sd (cptr, val, ',', TRUE); /* src */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| case F_V_ZM: /* zero mem */ | |
| cptr = get_op (cptr, val, ','); /* op */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_ma (cptr, val, 0); /* addr */ | |
| break; | |
| case F_V_MR: /* mem reg */ | |
| cptr = get_ma (cptr, val, ','); /* addr */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_op (cptr, val, ','); /* op */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_sd (cptr, val, 0, FALSE); /* dst */ | |
| break; | |
| case F_V_MS: /* mem self */ | |
| cptr = get_ma (cptr, val, ','); /* addr */ | |
| if (!cptr) | |
| return SCPE_ARG; | |
| cptr = get_op (cptr, val, 0); /* op */ | |
| break; | |
| } /* end case */ | |
| if (!cptr || (*cptr != 0)) /* junk at end? */ | |
| return SCPE_ARG; | |
| return (j >= F_2WD)? -1: SCPE_OK; | |
| } |