/* i701_sys.c: IBM 701 Simulator system interface. Copyright (c) 2005, Richard Cornwell 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. */ #include "i7090_defs.h" #include t_stat parse_sym(char *cptr, t_addr addr, UNIT * uptr, t_value * val, int32 sw); /* 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[] = "IBM 701"; REG *sim_PC = &cpu_reg[0]; int32 sim_emax = 1; DEVICE *sim_devices[] = { &cpu_dev, &chan_dev, #ifdef NUM_DEVS_CDR &cdr_dev, #endif #ifdef NUM_DEVS_CDP &cdp_dev, #endif #ifdef NUM_DEVS_LPR &lpr_dev, #endif #ifdef MT_CHANNEL_ZERO &mtz_dev, #endif #ifdef NUM_DEVS_DR &drm_dev, #endif NULL }; #ifdef NUM_DEVS_CDR DIB cdp_dib = { CH_TYP_PIO, 1, 02000, 07777, &cdp_cmd, &cdp_ini }; #endif #ifdef NUM_DEVS_CDP DIB cdr_dib = { CH_TYP_PIO, 1, 04000, 07777, &cdr_cmd, NULL }; #endif #ifdef NUM_DEVS_DR DIB drm_dib = { CH_TYP_PIO, 1, 0200, 07774, &drm_cmd, &drm_ini }; #endif #ifdef NUM_DEVS_LPR DIB lpr_dib = { CH_TYP_PIO, 1, 01000, 07777, &lpr_cmd, &lpr_ini }; #endif #ifdef MT_CHANNEL_ZERO DIB mt_dib = { CH_TYP_PIO, NUM_UNITS_MT, 0400, 07770, &mt_cmd, &mt_ini }; #endif /* Simulator stop codes */ const char *sim_stop_messages[] = { "Unknown error", "IO device not ready", "HALT instruction", "Breakpoint", "Unknown Opcode", "Nested indirects exceed limit", "Nested XEC's exceed limit", "I/O Check opcode", "Memory management trap during trap", "7750 invalid line number", "7750 invalid message", "7750 No free output buffers", "7750 No free input buffers", "Error?", "Error2", 0 }; /* Simulator debug controls */ DEBTAB dev_debug[] = { {"CHANNEL", DEBUG_CHAN}, {"TRAP", DEBUG_TRAP}, {"CMD", DEBUG_CMD}, {"DATA", DEBUG_DATA}, {"DETAIL", DEBUG_DETAIL}, {"EXP", DEBUG_EXP}, {"SENSE", DEBUG_SNS}, {0, 0} }; /* Character conversion tables */ extern char six_to_ascii[64]; extern char ascii_to_six[128]; /* Load a card image file into memory. */ t_stat sim_load(FILE * fileref, char *cptr, char *fnam, int flag) { t_uint64 wd; t_uint64 mask; int addr = 0; int dlen = 0; char *p; p = strrchr(fnam, '.'); if (p == NULL) return SCPE_ARG; p++; if (strcasecmp(p, "crd") == 0) { int firstcard = 1; uint16 buf[80]; t_uint64 lbuff[24]; int i; while (sim_fread(buf, 2, 80, fileref) == 80) { /* Bit flip into read buffer */ for (i = 0; i < 24; i++) { int bit = 1 << (i / 2); int b = 36 * (i & 1); int col; mask = 1; wd = 0; for (col = 35; col >= 0; mask <<= 1) { if (buf[col-- + b] & bit) wd |= mask; } lbuff[i] = wd; } i = 2; if (firstcard) { addr = 0; dlen = 3 + (int)((lbuff[0] >> 18) & 077777); firstcard = 0; i = 0; } else if (dlen == 0) { addr = (int)(lbuff[0] & 077777); dlen = (int)(lbuff[0] >> 18) & 077777; } for (; i < 24 && dlen > 0; i++) { M[addr++] = lbuff[i]; dlen--; } } } else if (strcasecmp(p, "oct") == 0) { char buf[81]; while (fgets(buf, 80, fileref) != 0) { for(p = buf; *p == ' ' || *p == '\t'; p++); /* Grab address */ for(addr = 0; *p >= '0' && *p <= '7'; p++) addr = (addr << 3) + *p - '0'; while(*p != '\n' && *p != '\0') { for(; *p == ' ' || *p == '\t'; p++); for(wd = 0; *p >= '0' && *p <= '7'; p++) wd = (wd << 3) + *p - '0'; if (addr < MAXMEMSIZE) M[addr++] = wd; } } } else if (strcasecmp(p, "txt") == 0) { char buf[81]; while (fgets(buf, 80, fileref) != 0) { for(p = buf; *p == ' ' || *p == '\t'; p++); /* Grab address */ for(addr = 0; *p >= '0' && *p <= '7'; p++) addr = (addr << 3) + *p - '0'; while(*p == ' ' || *p == '\t') p++; if(strncasecmp(p, "BCD", 3) == 0) { p += 4; parse_sym(++p, addr, &cpu_unit, &M[addr], SWMASK('C')); } else if (strncasecmp(p, "OCT", 3) == 0) { p += 4; for(; *p == ' ' || *p == '\t'; p++); parse_sym(p, addr, &cpu_unit, &M[addr], 0); } else { parse_sym(p, addr, &cpu_unit, &M[addr], SWMASK('M')); } } } else return SCPE_ARG; return SCPE_OK; } /* Symbol tables */ typedef struct _opcode { uint16 opbase; char *name; } t_opcode; /* Opcodes */ t_opcode base_ops[] = { {0, "STOP"}, {1, "TR"}, {2, "TRO"}, {3, "TRP"}, {4, "TRZ"}, {5, "SUB"}, {6, "R SUB"}, {7, "SUB AB"}, {8, "NO OP"}, {9, "ADD"}, {10, "R ADD"}, {11, "ADD AB"}, {12, "STORE"}, {13, "STORE A"}, {14, "STORE MQ"}, {15, "LOAD MQ"}, {16, "MPY"}, {17, "MPY R"}, {18, "DIV"}, {19, "ROUND"}, {20, "L LEFT"}, {21, "L RIGHT"}, {22, "A LEFT"}, {23, "A RIGHT"}, {24, "READ"}, {25, "READ B"}, {26, "WRITE"}, {27, "WRITE EF"}, {28, "REWIND"}, {29, "SET DR"}, {30, "SENSE"}, {31, "COPY"}, {13 + 040, "EXTR"}, {0, NULL} }; char *chname[] = { "*" }; /* Parse address Inputs: *dptr = pointer to device. *cptr = pointer to string. **tptr = pointer to final scaned character. Outputs: address with sign. */ t_addr parse_addr(DEVICE *dptr, char *cptr, char **tptr) { t_addr v; int s = 0; *tptr = cptr; if (dptr != &cpu_dev) return 0; v = 0; if (*cptr == '-') { cptr++; s = 1; } while(*cptr >= '0' && *cptr <= '7') { v <<= 3; v += *cptr++ - '0'; } if (v > 4096) return 0; if (s) { if ((cptr - 1) != *tptr) *tptr = cptr; v |= 0400000; } else { if (cptr != *tptr) *tptr = cptr; } return v; } void sys_init(void) { extern t_addr (*sim_vm_parse_addr) (DEVICE *, char *, char **); sim_vm_parse_addr = &parse_addr; } void (*sim_vm_init) (void) = &sys_init; /* Symbolic decode Inputs: *of = output stream addr = current PC *val = pointer to values *uptr = pointer to unit sw = switches Outputs: return = status code */ t_stat fprint_sym(FILE * of, t_addr addr, t_value * val, UNIT * uptr, int32 sw) { t_uint64 inst = *val; /* Print value in octal first */ fputc(' ', of); fprint_val(of, inst, 8, 36, PV_RZRO); if (sw & SWMASK('M')) { int op = (inst >> (12+18)); int i; fputs(" rt ", of); if (op != (040 + 13)) op &= 037; for(i = 0; base_ops[i].name != NULL; i++) { if (base_ops[i].opbase == op) { fputs(base_ops[i].name, of); break; } } fputc(' ', of); if ((inst >> 18) & 0400000L) fputc('-', of); fprint_val(of, (inst >> 18) & 0000000007777L, 8, 12, PV_RZRO); op = (inst >> 12); fputs(" lt ", of); if (op != (040 + 13)) op &= 037; for(i = 0; base_ops[i].name != NULL; i++) { if (base_ops[i].opbase == op) { fputs(base_ops[i].name, of); break; } } fputc(' ', of); if (inst & 0400000L) fputc('-', of); else fputc(' ', of); fprint_val(of, inst & 0000000007777L, 8, 12, PV_RZRO); } if (sw & SWMASK('C')) { int i; fputs(" '", of); for (i = 5; i >= 0; i--) { int ch; ch = (int)(inst >> (6 * i)) & 077; fputc(six_to_ascii[ch], of); } fputc('\'', of); } return SCPE_OK; } t_opcode * find_opcode(char *op, t_opcode * tab) { while (tab->name != NULL) { if (*tab->name != '\0' && strcmp(op, tab->name) == 0) return tab; tab++; } return NULL; } /* 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) { int i; int f; t_value d, tag; int sign; char opcode[100]; char *arg; while (isspace(*cptr)) cptr++; d = 0; if (sw & SWMASK('M')) { t_opcode *op; do { i = 0; sign = 0; f = 0; if (*cptr == ',') { d <<= 18; cptr++; } /* Skip blanks */ while (isspace(*cptr)) cptr++; /* Grab opcode */ cptr = get_glyph(cptr, opcode, ','); if ((op = find_opcode(opcode, base_ops)) != 0) { d |= (t_uint64) op->opbase << 12; } else { return STOP_UUO; } cptr = get_glyph(cptr, opcode, ','); tag = parse_addr(&cpu_dev, opcode, &arg); if (arg != opcode) d += (t_uint64)tag; } while (*cptr == ','); if (*cptr != '\0') return STOP_UUO; *val = d; return SCPE_OK; } else if (sw & SWMASK('C')) { i = 0; while (*cptr != '\0' && i < 6) { d <<= 6; if (ascii_to_six[0177 & *cptr] != -1) d |= ascii_to_six[0177 & *cptr]; cptr++; i++; } while (i < 6) { d <<= 6; d |= 060; i++; } } else { if (*cptr == '-') { sign = 1; cptr++; } else { sign = 0; if (*cptr == '+') cptr++; } while (*cptr >= '0' && *cptr <= '7') { d <<= 3; d |= *cptr++ - '0'; } if (sign) d |= 00400000000000L; } *val = d; return SCPE_OK; }