First Commit of my working state

[simh.git] / I1401 / i1401_sys.c

/* i1401_sys.c: IBM 1401 simulator interface\r
\r
   Copyright (c) 1993-2005, Robert M. Supnik\r
\r
   Permission is hereby granted, free of charge, to any person obtaining a\r
   copy of this software and associated documentation files (the "Software"),\r
   to deal in the Software without restriction, including without limitation\r
   the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
   and/or sell copies of the Software, and to permit persons to whom the\r
   Software is furnished to do so, subject to the following conditions:\r
\r
   The above copyright notice and this permission notice shall be included in\r
   all copies or substantial portions of the Software.\r
\r
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL\r
   ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
   IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
\r
   Except as contained in this notice, the name of Robert M Supnik shall not be\r
   used in advertising or otherwise to promote the sale, use or other dealings\r
   in this Software without prior written authorization from Robert M Supnik.\r
\r
   20-Sep-05    RMS     Revised for new code tables\r
   04-Jan-05    WVS     Added address argument support\r
   14-Nov-04    WVS     Added data printout support\r
   16-Mar-03    RMS     Fixed mnemonic for MCS\r
   03-Jun-02    RMS     Added 1311 support\r
   18-May-02    RMS     Added -D feature from Van Snyder\r
   26-Jan-02    RMS     Fixed H, NOP with no trailing wm (found by Van Snyder)\r
   17-Sep-01    RMS     Removed multiconsole support\r
   13-Jul-01    RMS     Fixed bug in symbolic output (found by Peter Schorn)\r
   27-May-01    RMS     Added multiconsole support\r
   14-Mar-01    RMS     Revised load/dump interface (again)\r
   30-Oct-00    RMS     Added support for examine to file\r
   27-Oct-98    RMS     V2.4 load interface\r
*/\r
\r
#include "i1401_defs.h"\r
#include <ctype.h>\r
\r
#define LINE_LNT        80\r
extern DEVICE cpu_dev, inq_dev, lpt_dev;\r
extern DEVICE cdr_dev, cdp_dev, stack_dev;\r
extern DEVICE dp_dev, mt_dev;\r
extern UNIT cpu_unit;\r
extern REG cpu_reg[];\r
extern uint8 M[];\r
extern char ascii_to_bcd_old[128], ascii_to_bcd[128];\r
extern char bcd_to_ascii_old[64], bcd_to_ascii_a[64], bcd_to_ascii_h[64];\r
extern char *get_glyph (char *cptr, char *gbuf, char term);\r
extern int32 store_addr_h (int32 addr);\r
extern int32 store_addr_t (int32 addr);\r
extern int32 store_addr_u (int32 addr);\r
extern t_bool conv_old;\r
\r
/* SCP data structures and interface routines\r
\r
   sim_name             simulator name string\r
   sim_PC               pointer to saved PC register descriptor\r
   sim_emax             maximum number of words for examine/deposit\r
   sim_devices          array of pointers to simulated devices\r
   sim_stop_messages    array of pointers to stop messages\r
   sim_load             binary loader\r
*/\r
\r
char sim_name[] = "IBM 1401";\r
\r
REG *sim_PC = &cpu_reg[0];\r
\r
int32 sim_emax = LINE_LNT;\r
\r
DEVICE *sim_devices[] = {\r
    &cpu_dev,\r
    &inq_dev,\r
    &cdr_dev,\r
    &cdp_dev,\r
    &stack_dev,\r
    &lpt_dev,\r
    &mt_dev,\r
    &dp_dev,\r
    NULL\r
    };\r
\r
const char *sim_stop_messages[] = {\r
    "Unknown error",\r
    "Unimplemented instruction",\r
    "Non-existent memory",\r
    "Non-existent device",\r
    "No WM at instruction start",\r
    "Invalid A address",\r
    "Invalid B address",\r
    "Invalid instruction length",\r
    "Invalid modifer",\r
    "Invalid branch address",\r
    "Breakpoint",\r
    "HALT instruction",\r
    "Invalid MT unit number",\r
    "Invalid MT record length",\r
    "Write to locked MT unit",  \r
    "Skip to unpunched CCT channel",\r
    "Card reader empty",\r
    "Address register wrap",\r
    "I/O check",\r
    "Invalid disk sector address",\r
    "Invalid disk sector count",\r
    "Invalid disk unit",\r
    "Invalid disk function",\r
    "Invalid disk record length",\r
    "Write track while disabled",\r
    "Write check error",\r
    "Disk address miscompare",\r
    "Direct seek cylinder exceeds maximum"\r
    };\r
\r
/* Binary loader -- load carriage control tape\r
\r
   A carriage control tape consists of entries of the form\r
\r
        (repeat count) column number,column number,column number,...\r
\r
   The CCT entries are stored in cct[0:lnt-1], cctlnt contains the\r
   number of entries\r
*/\r
\r
t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag)\r
{\r
int32 col, rpt, ptr, mask, cctbuf[CCT_LNT];\r
t_stat r;\r
extern int32 cctlnt, cctptr, cct[CCT_LNT];\r
char cbuf[CBUFSIZE], gbuf[CBUFSIZE];\r
\r
if ((*cptr != 0) || (flag != 0)) return SCPE_ARG;\r
ptr = 0;\r
for ( ; (cptr = fgets (cbuf, CBUFSIZE, fileref)) != NULL; ) { /* until eof */\r
    mask = 0;\r
    if (*cptr == '(') {                                 /* repeat count? */\r
        cptr = get_glyph (cptr + 1, gbuf, ')');         /* get 1st field */\r
        rpt = get_uint (gbuf, 10, CCT_LNT, &r);         /* repeat count */\r
        if (r != SCPE_OK) return SCPE_FMT;\r
        }\r
    else rpt = 1;\r
    while (*cptr != 0) {                                /* get col no's */\r
        cptr = get_glyph (cptr, gbuf, ',');             /* get next field */\r
        col = get_uint (gbuf, 10, 12, &r);              /* column number */\r
        if (r != SCPE_OK) return SCPE_FMT;\r
        mask = mask | (1 << col);                       /* set bit */\r
        }\r
    for ( ; rpt > 0; rpt--) {                           /* store vals */\r
        if (ptr >= CCT_LNT) return SCPE_FMT;\r
        cctbuf[ptr++] = mask;\r
        }\r
    }\r
if (ptr == 0) return SCPE_FMT;\r
cctlnt = ptr;\r
cctptr = 0;\r
for (rpt = 0; rpt < cctlnt; rpt++) cct[rpt] = cctbuf[rpt];\r
return SCPE_OK;\r
}\r
\r
/* Symbol table */\r
\r
const char *opcode[64] = {\r
 NULL,  "R",   "W",  "WR",  "P",   "RP",  "WP",  "WRP",\r
 "SRF", "SPF", NULL, "MA",  "MUL", NULL,  NULL,  NULL,\r
 NULL,  "CS",  "S",  NULL,  "MTF", "BWZ", "BBE", NULL,\r
 "MZ",  "MCS", NULL, "SWM", "DIV", NULL,  NULL,  NULL,\r
 NULL,  NULL,  "SS", "LCA", "MCW", "NOP", NULL,  "MCM",\r
 "SAR", NULL,  "ZS", NULL,  NULL,  NULL,  NULL,  NULL,\r
 NULL,  "A",   "B",  "C",   "MN",  "MCE", "CC",  NULL,\r
 "SBR", NULL,  "ZA", "H",   "CWM", NULL,  NULL,  NULL\r
 };\r
\r
/* Print an address from three characters */\r
\r
void fprint_addr (FILE *of, t_value *dig)\r
{\r
int32 addr, xa;\r
extern int32 hun_table[64], ten_table[64], one_table[64];\r
\r
addr = hun_table[dig[0] & CHAR] + ten_table[dig[1]] + one_table[dig[2]];\r
xa = (addr >> V_INDEX) & M_INDEX;\r
if (xa) fprintf (of, " %d,%d", addr & ADDRMASK, ((xa - (X1 >> V_INDEX)) / 5) + 1);\r
else if (addr >= MAXMEMSIZE) fprintf (of, " %d*", addr & ADDRMASK);\r
else fprintf (of, " %d", addr);\r
return;\r
}\r
\r
/* Print unknown opcode as data */\r
\r
t_stat dcw (FILE *of, int32 op, t_value *val, int32 sw)\r
{\r
int32 i;\r
t_bool use_h = sw & SWMASK ('F');\r
\r
fprintf (of, "DCW @%c", bcd2ascii (op, use_h));         /* assume it's data */\r
for (i = 1; i < sim_emax; i++) {\r
        if (val[i] & WM) break;\r
        fprintf (of, "%c", bcd2ascii (val[i], use_h));\r
        }\r
fprintf (of, "@");\r
return -(i - 1);                                        /* return # chars */\r
}\r
\r
/* Symbolic decode\r
\r
   Inputs:\r
        *of     =       output stream\r
        addr    =       current address\r
        *val    =       values to decode\r
        *uptr   =       pointer to unit\r
        sw      =       switches\r
   Outputs:\r
        return  =       if >= 0, error code\r
                        if < 0, number of extra words retired\r
*/\r
\r
#define FMTASC(x) ((x) < 040)? "<%03o>": "%c", (x)\r
\r
t_stat fprint_sym (FILE *of, t_addr addr, t_value *val,\r
    UNIT *uptr, int32 sw)\r
{\r
int32 op, flags, ilnt, i, t;\r
int32 wmch = conv_old? '~': '`';\r
t_bool use_h = sw & SWMASK ('F');\r
extern int32 op_table[64], len_table[9];\r
\r
if (sw & SWMASK ('C')) {                                /* character? */\r
    t = val[0];\r
    if (uptr->flags & UNIT_BCD) {\r
        if (t & WM) fputc (wmch, of);\r
        fputc (bcd2ascii (t & CHAR, use_h), of);\r
        }\r
    else fprintf (of, FMTASC (t & 0177));\r
    return SCPE_OK;\r
    }\r
if ((uptr != NULL) && (uptr != &cpu_unit))              /* CPU? */\r
     return SCPE_ARG;\r
if (sw & SWMASK ('D')) {                                /* dump? */\r
    for (i = 0; i < 50; i++)\r
        fprintf (of, "%c", bcd2ascii (val[i] & CHAR, use_h)) ;\r
    fprintf (of, "\n\t");\r
    for (i = 0; i < 50; i++)\r
        fprintf (of, (val[i] & WM)? "1": " ") ;\r
    return -(i - 1);\r
    }\r
if (sw & SWMASK ('S')) {                                /* string? */\r
    i = 0;\r
    do {\r
        t = val[i++];\r
        if (t & WM) fputc (wmch, of);\r
        fputc (bcd2ascii (t & CHAR, use_h), of);\r
        } while ((i < LINE_LNT) && ((val[i] & WM) == 0));\r
    return -(i - 1);\r
    }\r
if ((sw & SWMASK ('M')) == 0) return SCPE_ARG;\r
\r
if ((val[0] & WM) == 0) return STOP_NOWM;               /* WM under op? */\r
op = val[0]& CHAR;                                      /* isolate op */\r
if (opcode[op] == NULL) return dcw (of, op, val, sw);   /* invalid op */\r
flags = op_table[op];                                   /* get flags */\r
for (ilnt = 1; ilnt < sim_emax; ilnt++) {               /* find inst lnt */\r
    if (val[ilnt] & WM) break;\r
    }\r
if ((flags & (NOWM | HNOP)) && (ilnt > 7)) ilnt = 7;    /* cs, swm, h, nop? */\r
else if ((op == OP_B) && (ilnt > 4) && (val[4] == BCD_BLANK)) ilnt = 4;\r
else if ((ilnt > 8) && (op != OP_NOP)) ilnt = 8;        /* cap length */\r
if (ilnt == 3) {                                        /* lnt = 3? */\r
    fprintf (of, "DSA");                                /* assume DSA */\r
    fprint_addr (of, val);                              /* print addr */\r
    return -(ilnt - 1);\r
    }\r
if ((((flags & len_table[ilnt]) == 0) &&                /* invalid lnt, */\r
    (op != OP_NOP)) ||                                  /* not nop? */\r
    (opcode[op] == NULL))                               /* or undef? */\r
    return dcw (of, op, val, sw);\r
fprintf (of, "%s",opcode[op]);                          /* print opcode */\r
if (ilnt > 2) {                                         /* A address? */\r
    if (((flags & IO) || (op == OP_NOP)) && (val[1] == BCD_PERCNT))\r
        fprintf (of, " %%%c%c", bcd2ascii (val[2], use_h),\r
            bcd2ascii (val[3], sw));\r
    else fprint_addr (of, &val[1]);\r
	}\r
if (ilnt > 5) fprint_addr (of, &val[4]);                /* B address? */\r
if ((ilnt == 2) || (ilnt == 5) || (ilnt == 8))          /* d character? */\r
    fprintf (of, " '%c", bcd2ascii (val[ilnt - 1], use_h));\r
return -(ilnt - 1);                                     /* return # chars */\r
}\r
\r
/* get_addr - get address + index pair */\r
\r
t_stat get_addr (char *cptr, t_value *val)\r
{\r
int32 addr, index;\r
t_stat r;\r
char gbuf[CBUFSIZE];\r
\r
cptr = get_glyph (cptr, gbuf, ',');                     /* get address */\r
addr = get_uint (gbuf, 10, MAXMEMSIZE, &r);\r
if (r != SCPE_OK) return SCPE_ARG;\r
if (*cptr != 0) {                                       /* more? */\r
    cptr = get_glyph (cptr, gbuf, ' ');\r
    index = get_uint (gbuf, 10, 3, &r);\r
    if ((r != SCPE_OK) || (index == 0)) return SCPE_ARG;\r
    }\r
else index = 0;\r
if (*cptr != 0) return SCPE_ARG;\r
val[0] = store_addr_h (addr);\r
val[1] = store_addr_t (addr) | (index << V_ZONE);\r
val[2] = store_addr_u (addr);\r
return SCPE_OK;\r
}\r
\r
/* get_io - get I/O address */\r
\r
t_stat get_io (char *cptr, t_value *val)\r
{\r
if ((cptr[0] != '%') || (cptr[3] != 0) || !isalnum (cptr[1]) ||\r
    !isalnum (cptr[2])) return SCPE_ARG;\r
val[0] = BCD_PERCNT;\r
val[1] = ascii2bcd (cptr[1]);\r
val[2] = ascii2bcd (cptr[2]);\r
return SCPE_OK;\r
}\r
\r
/* Symbolic input\r
\r
   Inputs:\r
        *cptr   =       pointer to input string\r
        addr    =       current PC\r
        *uptr   =       pointer to unit\r
        *val    =       pointer to output values\r
        sw      =       switches\r
   Outputs:\r
        status  =       > 0   error code\r
                        <= 0  -number of extra words\r
*/\r
\r
t_stat parse_sym (char *cptr, t_addr addr, UNIT *uptr, t_value *val, int32 sw)\r
{\r
int32 i, op, ilnt, t, cflag, wm_seen;\r
int32 wmch = conv_old? '~': '`';\r
extern int32 op_table[64], len_table[9];\r
char gbuf[CBUFSIZE];\r
\r
cflag = (uptr == NULL) || (uptr == &cpu_unit);\r
while (isspace (*cptr)) cptr++;                         /* absorb spaces */\r
if ((sw & SWMASK ('C')) || (sw & SWMASK ('S')) || (*cptr == wmch) ||\r
    ((*cptr == '\'') && cptr++) || ((*cptr == '"') && cptr++)) {\r
        wm_seen = 0;\r
        for (i = 0; (i < sim_emax) && (*cptr != 0); ) {\r
            t = *cptr++;                                /* get character */\r
            if (cflag && (wm_seen == 0) && (t == wmch)) wm_seen = WM;\r
            else if (uptr->flags & UNIT_BCD) {\r
                if (t < 040) return SCPE_ARG;\r
                val[i++] = ascii2bcd (t) | wm_seen;\r
                wm_seen = 0;\r
                }\r
            else val[i++] = t;\r
			}\r
        if ((i == 0) || wm_seen) return SCPE_ARG;\r
        return -(i - 1);\r
        }\r
\r
if (cflag == 0) return SCPE_ARG;                        /* CPU only */\r
cptr = get_glyph (cptr, gbuf, 0);                       /* get opcode */\r
for (op = 0; op < 64; op++) {                           /* look it up */\r
    if (opcode[op] && strcmp (gbuf, opcode[op]) == 0) break;\r
    }\r
if (op >= 64) return SCPE_ARG;                          /* successful? */\r
val[0] = op | WM;                                       /* store opcode */\r
cptr = get_glyph (cptr, gbuf, 0);                       /* get addr or d */\r
if (((op_table[op] && IO) && (get_io (gbuf, &val[1]) == SCPE_OK)) ||\r
     (get_addr (gbuf, &val[1]) == SCPE_OK)) {\r
        cptr = get_glyph (cptr, gbuf, 0);               /* get addr or d */\r
        if (get_addr (gbuf, &val[4]) == SCPE_OK) {\r
            cptr = get_glyph (cptr, gbuf, ',');         /* get d */\r
            ilnt = 7;                                   /* a and b addresses */\r
            }\r
        else ilnt = 4;                                  /* a address */\r
        }\r
else ilnt = 1;                                          /* no addresses */\r
if ((gbuf[0] == '\'') || (gbuf[0] == '"')) {            /* d character? */\r
    t = gbuf[1];\r
    if ((gbuf[2] != 0) || (*cptr != 0) || (t < 040))\r
        return SCPE_ARG;                                /* end and legal? */\r
    val[ilnt] = ascii2bcd (t);                          /* save D char */\r
    ilnt = ilnt + 1;\r
    }\r
else if (gbuf[0] != 0) return SCPE_ARG;                 /* not done? */\r
if ((op_table[op] & len_table[ilnt]) == 0) return STOP_INVL;\r
return -(ilnt - 1);\r
}\r
\r
/* Convert BCD to ASCII */\r
\r
int32 bcd2ascii (int32 c, t_bool use_h)\r
{\r
if (conv_old) return bcd_to_ascii_old[c];\r
else if (use_h) return bcd_to_ascii_h[c];\r
else return bcd_to_ascii_a[c];\r
}\r
\r
/* Convert ASCII to BCD */\r
\r
int32 ascii2bcd (int32 c)\r
{\r
if (conv_old) return ascii_to_bcd_old[c];\r
else return ascii_to_bcd[c];\r
}\r