| /* i1401_sys.c: IBM 1401 simulator interface | |
| Copyright (c) 1993-2014, 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. | |
| 25-Mar-14 RMS Fixed d character printout (Van Snyder) | |
| 25-Mar-12 RMS Fixed && -> & in test (Peter Schorn) | |
| 20-Sep-05 RMS Revised for new code tables | |
| 04-Jan-05 WVS Added address argument support | |
| 14-Nov-04 WVS Added data printout support | |
| 16-Mar-03 RMS Fixed mnemonic for MCS | |
| 03-Jun-02 RMS Added 1311 support | |
| 18-May-02 RMS Added -D feature (Van Snyder) | |
| 26-Jan-02 RMS Fixed H, NOP with no trailing wm (Van Snyder) | |
| 17-Sep-01 RMS Removed multiconsole support | |
| 13-Jul-01 RMS Fixed bug in symbolic output (Peter Schorn) | |
| 27-May-01 RMS Added multiconsole support | |
| 14-Mar-01 RMS Revised load/dump interface (again) | |
| 30-Oct-00 RMS Added support for examine to file | |
| 27-Oct-98 RMS V2.4 load interface | |
| */ | |
| #include "i1401_defs.h" | |
| #include <ctype.h> | |
| #define LINE_LNT 80 | |
| extern DEVICE cpu_dev, inq_dev, lpt_dev; | |
| extern DEVICE cdr_dev, cdp_dev, stack_dev; | |
| extern DEVICE dp_dev, mt_dev; | |
| extern UNIT cpu_unit; | |
| extern REG cpu_reg[]; | |
| extern uint8 M[]; | |
| extern char ascii_to_bcd_old[128], ascii_to_bcd[128]; | |
| extern char bcd_to_ascii_old[64], bcd_to_ascii_a[64], bcd_to_ascii_h[64]; | |
| extern int32 store_addr_h (int32 addr); | |
| extern int32 store_addr_t (int32 addr); | |
| extern int32 store_addr_u (int32 addr); | |
| extern t_bool conv_old; | |
| /* 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[] = "IBM 1401"; | |
| REG *sim_PC = &cpu_reg[0]; | |
| int32 sim_emax = LINE_LNT; | |
| DEVICE *sim_devices[] = { | |
| &cpu_dev, | |
| &inq_dev, | |
| &cdr_dev, | |
| &cdp_dev, | |
| &stack_dev, | |
| &lpt_dev, | |
| &mt_dev, | |
| &dp_dev, | |
| NULL | |
| }; | |
| const char *sim_stop_messages[] = { | |
| "Unknown error", | |
| "Unimplemented instruction", | |
| "Non-existent memory", | |
| "Non-existent device", | |
| "No WM at instruction start", | |
| "Invalid A address", | |
| "Invalid B address", | |
| "Invalid instruction length", | |
| "Invalid modifer", | |
| "Invalid branch address", | |
| "Breakpoint", | |
| "HALT instruction", | |
| "Invalid MT unit number", | |
| "Invalid MT record length", | |
| "Write to locked MT unit", | |
| "Skip to unpunched CCT channel", | |
| "Card reader empty", | |
| "Address register wrap", | |
| "I/O check", | |
| "Invalid disk sector address", | |
| "Invalid disk sector count", | |
| "Invalid disk unit", | |
| "Invalid disk function", | |
| "Invalid disk record length", | |
| "Write track while disabled", | |
| "Write check error", | |
| "Disk address miscompare", | |
| "Direct seek cylinder exceeds maximum" | |
| }; | |
| /* Binary loader -- load carriage control tape | |
| A carriage control tape consists of entries of the form | |
| (repeat count) column number,column number,column number,... | |
| The CCT entries are stored in cct[0:lnt-1], cctlnt contains the | |
| number of entries | |
| */ | |
| t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag) | |
| { | |
| int32 col, rpt, ptr, mask, cctbuf[CCT_LNT]; | |
| t_stat r; | |
| extern int32 cctlnt, cctptr, cct[CCT_LNT]; | |
| char cbuf[CBUFSIZE], gbuf[CBUFSIZE]; | |
| if ((*cptr != 0) || (flag != 0)) | |
| return SCPE_ARG; | |
| ptr = 0; | |
| for ( ; (cptr = fgets (cbuf, CBUFSIZE, fileref)) != NULL; ) { /* until eof */ | |
| mask = 0; | |
| if (*cptr == '(') { /* repeat count? */ | |
| cptr = get_glyph (cptr + 1, gbuf, ')'); /* get 1st field */ | |
| rpt = get_uint (gbuf, 10, CCT_LNT, &r); /* repeat count */ | |
| if (r != SCPE_OK) | |
| return SCPE_FMT; | |
| } | |
| else rpt = 1; | |
| while (*cptr != 0) { /* get col no's */ | |
| cptr = get_glyph (cptr, gbuf, ','); /* get next field */ | |
| col = get_uint (gbuf, 10, 12, &r); /* column number */ | |
| if (r != SCPE_OK) | |
| return SCPE_FMT; | |
| mask = mask | (1 << col); /* set bit */ | |
| } | |
| for ( ; rpt > 0; rpt--) { /* store vals */ | |
| if (ptr >= CCT_LNT) | |
| return SCPE_FMT; | |
| cctbuf[ptr++] = mask; | |
| } | |
| } | |
| if (ptr == 0) | |
| return SCPE_FMT; | |
| cctlnt = ptr; | |
| cctptr = 0; | |
| for (rpt = 0; rpt < cctlnt; rpt++) | |
| cct[rpt] = cctbuf[rpt]; | |
| return SCPE_OK; | |
| } | |
| /* Symbol table */ | |
| const char *opcode[64] = { | |
| NULL, "R", "W", "WR", "P", "RP", "WP", "WRP", | |
| "SRF", "SPF", NULL, "MA", "MUL", NULL, NULL, NULL, | |
| NULL, "CS", "S", NULL, "MTF", "BWZ", "BBE", NULL, | |
| "MZ", "MCS", NULL, "SWM", "DIV", NULL, NULL, NULL, | |
| NULL, NULL, "SS", "LCA", "MCW", "NOP", NULL, "MCM", | |
| "SAR", NULL, "ZS", NULL, NULL, NULL, NULL, NULL, | |
| NULL, "A", "B", "C", "MN", "MCE", "CC", NULL, | |
| "SBR", NULL, "ZA", "H", "CWM", NULL, NULL, NULL | |
| }; | |
| /* Print an address from three characters */ | |
| void fprint_addr (FILE *of, t_value *dig) | |
| { | |
| int32 addr, xa; | |
| extern int32 hun_table[64], ten_table[64], one_table[64]; | |
| addr = hun_table[dig[0] & CHAR] + ten_table[dig[1]] + one_table[dig[2]]; | |
| xa = (addr >> V_INDEX) & M_INDEX; | |
| if (xa) | |
| fprintf (of, " %d,%d", addr & ADDRMASK, ((xa - (X1 >> V_INDEX)) / 5) + 1); | |
| else if (addr >= MAXMEMSIZE) | |
| fprintf (of, " %d*", addr & ADDRMASK); | |
| else fprintf (of, " %d", addr); | |
| return; | |
| } | |
| /* Print unknown opcode as data */ | |
| t_stat dcw (FILE *of, int32 op, t_value *val, int32 sw) | |
| { | |
| int32 i; | |
| t_bool use_h = sw & SWMASK ('F'); | |
| fprintf (of, "DCW @%c", bcd2ascii (op, use_h)); /* assume it's data */ | |
| for (i = 1; i < sim_emax; i++) { | |
| if (val[i] & WM) | |
| break; | |
| fprintf (of, "%c", bcd2ascii (val[i], use_h)); | |
| } | |
| fprintf (of, "@"); | |
| return -(i - 1); /* return # chars */ | |
| } | |
| /* Symbolic decode | |
| Inputs: | |
| *of = output stream | |
| addr = current address | |
| *val = values to decode | |
| *uptr = pointer to unit | |
| sw = switches | |
| Outputs: | |
| return = if >= 0, error code | |
| if < 0, number of extra words retired | |
| */ | |
| #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 op, flags, ilnt, i, t; | |
| int32 wmch = conv_old? '~': '`'; | |
| t_bool use_h = sw & SWMASK ('F'); | |
| extern int32 op_table[64], len_table[9]; | |
| if (sw & SWMASK ('C')) { /* character? */ | |
| t = val[0]; | |
| if (uptr->flags & UNIT_BCD) { | |
| if (t & WM) | |
| fputc (wmch, of); | |
| fputc (bcd2ascii (t & CHAR, use_h), of); | |
| } | |
| else fprintf (of, FMTASC (t & 0177)); | |
| return SCPE_OK; | |
| } | |
| if ((uptr != NULL) && (uptr != &cpu_unit)) /* CPU? */ | |
| return SCPE_ARG; | |
| if (sw & SWMASK ('D')) { /* dump? */ | |
| for (i = 0; i < 50; i++) | |
| fprintf (of, "%c", bcd2ascii (val[i] & CHAR, use_h)) ; | |
| fprintf (of, "\n\t"); | |
| for (i = 0; i < 50; i++) | |
| fprintf (of, (val[i] & WM)? "1": " ") ; | |
| return -(i - 1); | |
| } | |
| if (sw & SWMASK ('S')) { /* string? */ | |
| i = 0; | |
| do { | |
| t = val[i++]; | |
| if (t & WM) | |
| fputc (wmch, of); | |
| fputc (bcd2ascii (t & CHAR, use_h), of); | |
| } while ((i < LINE_LNT) && ((val[i] & WM) == 0)); | |
| return -(i - 1); | |
| } | |
| if ((sw & SWMASK ('M')) == 0) | |
| return SCPE_ARG; | |
| if ((val[0] & WM) == 0) /* WM under op? */ | |
| return STOP_NOWM; | |
| op = val[0]& CHAR; /* isolate op */ | |
| if (opcode[op] == NULL) /* invalid op */ | |
| return dcw (of, op, val, sw); | |
| flags = op_table[op]; /* get flags */ | |
| for (ilnt = 1; ilnt < sim_emax; ilnt++) { /* find inst lnt */ | |
| if (val[ilnt] & WM) | |
| break; | |
| } | |
| if ((flags & (NOWM | HNOP)) && (ilnt > 7)) /* cs, swm, h, nop? */ | |
| ilnt = 7; | |
| else if ((op == OP_B) && (ilnt > 4) && (val[4] == BCD_BLANK)) | |
| ilnt = 4; | |
| if (ilnt == 3) { /* lnt = 3? */ | |
| fprintf (of, "DSA"); /* assume DSA */ | |
| fprint_addr (of, val); /* print addr */ | |
| return -(ilnt - 1); | |
| } | |
| if ((((flags & len_table[(ilnt > 8)? 8: ilnt]) == 0) && /* invalid lnt, */ | |
| (op != OP_NOP)) || /* not nop? */ | |
| (opcode[op] == NULL)) /* or undef? */ | |
| return dcw (of, op, val, sw); | |
| fprintf (of, "%s",opcode[op]); /* print opcode */ | |
| if (ilnt > 2) { /* A address? */ | |
| if (((flags & IO) || (op == OP_NOP)) && (val[1] == BCD_PERCNT)) | |
| fprintf (of, " %%%c%c", bcd2ascii (val[2], use_h), | |
| bcd2ascii (val[3], sw)); | |
| else fprint_addr (of, &val[1]); | |
| } | |
| if (ilnt > 5) /* B address? */ | |
| fprint_addr (of, &val[4]); | |
| if ((ilnt == 2) || (ilnt == 5) || (ilnt >= 8)) /* d character? */ | |
| fprintf (of, " '%c", bcd2ascii (val[ilnt - 1], use_h)); | |
| return -(ilnt - 1); /* return # chars */ | |
| } | |
| /* get_addr - get address + index pair */ | |
| t_stat get_addr (char *cptr, t_value *val) | |
| { | |
| int32 addr, index; | |
| t_stat r; | |
| char gbuf[CBUFSIZE]; | |
| cptr = get_glyph (cptr, gbuf, ','); /* get address */ | |
| addr = get_uint (gbuf, 10, MAXMEMSIZE, &r); | |
| if (r != SCPE_OK) | |
| return SCPE_ARG; | |
| if (*cptr != 0) { /* more? */ | |
| cptr = get_glyph (cptr, gbuf, ' '); | |
| index = get_uint (gbuf, 10, 3, &r); | |
| if ((r != SCPE_OK) || (index == 0)) | |
| return SCPE_ARG; | |
| } | |
| else index = 0; | |
| if (*cptr != 0) | |
| return SCPE_ARG; | |
| val[0] = store_addr_h (addr); | |
| val[1] = store_addr_t (addr) | (index << V_ZONE); | |
| val[2] = store_addr_u (addr); | |
| return SCPE_OK; | |
| } | |
| /* get_io - get I/O address */ | |
| t_stat get_io (char *cptr, t_value *val) | |
| { | |
| if ((cptr[0] != '%') || (cptr[3] != 0) || | |
| !isalnum (cptr[1]) || !isalnum (cptr[2])) | |
| return SCPE_ARG; | |
| val[0] = BCD_PERCNT; | |
| val[1] = ascii2bcd (cptr[1]); | |
| val[2] = ascii2bcd (cptr[2]); | |
| return SCPE_OK; | |
| } | |
| /* 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 i, op, ilnt, t, cflag, wm_seen; | |
| int32 wmch = conv_old? '~': '`'; | |
| extern int32 op_table[64], len_table[9]; | |
| char gbuf[CBUFSIZE]; | |
| cflag = (uptr == NULL) || (uptr == &cpu_unit); | |
| while (isspace (*cptr)) cptr++; /* absorb spaces */ | |
| if ((sw & SWMASK ('C')) || (sw & SWMASK ('S')) || (*cptr == wmch) || | |
| ((*cptr == '\'') && cptr++) || ((*cptr == '"') && cptr++)) { | |
| wm_seen = 0; | |
| for (i = 0; (i < sim_emax) && (*cptr != 0); ) { | |
| t = *cptr++; /* get character */ | |
| if (cflag && (wm_seen == 0) && (t == wmch)) | |
| wm_seen = WM; | |
| else if (uptr->flags & UNIT_BCD) { | |
| if (t < 040) | |
| return SCPE_ARG; | |
| val[i++] = ascii2bcd (t) | wm_seen; | |
| wm_seen = 0; | |
| } | |
| else val[i++] = t; | |
| } | |
| if ((i == 0) || wm_seen) | |
| return SCPE_ARG; | |
| return -(i - 1); | |
| } | |
| if (cflag == 0) /* CPU only */ | |
| return SCPE_ARG; | |
| cptr = get_glyph (cptr, gbuf, 0); /* get opcode */ | |
| for (op = 0; op < 64; op++) { /* look it up */ | |
| if (opcode[op] && strcmp (gbuf, opcode[op]) == 0) | |
| break; | |
| } | |
| if (op >= 64) /* successful? */ | |
| return SCPE_ARG; | |
| val[0] = op | WM; /* store opcode */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get addr or d */ | |
| if (((op_table[op] & IO) && (get_io (gbuf, &val[1]) == SCPE_OK)) || | |
| (get_addr (gbuf, &val[1]) == SCPE_OK)) { | |
| cptr = get_glyph (cptr, gbuf, 0); /* get addr or d */ | |
| if (get_addr (gbuf, &val[4]) == SCPE_OK) { | |
| cptr = get_glyph (cptr, gbuf, ','); /* get d */ | |
| ilnt = 7; /* a and b addresses */ | |
| } | |
| else ilnt = 4; /* a address */ | |
| } | |
| else ilnt = 1; /* no addresses */ | |
| if ((gbuf[0] == '\'') || (gbuf[0] == '"')) { /* d character? */ | |
| t = gbuf[1]; | |
| if ((gbuf[2] != 0) || (*cptr != 0) || (t < 040)) | |
| return SCPE_ARG; /* end and legal? */ | |
| val[ilnt] = ascii2bcd (t); /* save D char */ | |
| ilnt = ilnt + 1; | |
| } | |
| else if (gbuf[0] != 0) /* not done? */ | |
| return SCPE_ARG; | |
| if ((op_table[op] & len_table[ilnt]) == 0) | |
| return STOP_INVL; | |
| return -(ilnt - 1); | |
| } | |
| /* Convert BCD to ASCII */ | |
| int32 bcd2ascii (int32 c, t_bool use_h) | |
| { | |
| if (conv_old) | |
| return bcd_to_ascii_old[c]; | |
| else if (use_h) | |
| return bcd_to_ascii_h[c]; | |
| else return bcd_to_ascii_a[c]; | |
| } | |
| /* Convert ASCII to BCD */ | |
| int32 ascii2bcd (int32 c) | |
| { | |
| if (conv_old) | |
| return ascii_to_bcd_old[c]; | |
| else return ascii_to_bcd[c]; | |
| } |