text: /* pdp10_sys.c: PDP-10 simulator interface
  
     Copyright (c) 1993-2011, 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.
  
     04-Apr-11    RMS     Removed DEUNA/DELUA support - never implemented
     01-Feb-07    RMS     Added CD support
     22-Jul-05    RMS     Fixed warning from Solaris C (from Doug Gwyn)
     09-Jan-03    RMS     Added DEUNA/DELUA support
     12-Sep-02    RMS     Added RX211 support
     22-Apr-02    RMS     Removed magtape record length error
     17-Sep-01    RMS     Removed multiconsole support
     25-Aug-01    RMS     Enabled DZ11
     27-May-01    RMS     Added multiconsole support
     29-Apr-01    RMS     Fixed format for RDPCST, WRPCST
                          Added CLRCSH for ITS
     03-Apr-01    RMS     Added support for loading EXE files
     19-Mar-01    RMS     Added support for loading SAV files
     30-Oct-00    RMS     Added support for examine to file
  */
  
  #include "pdp10_defs.h"
  #include <ctype.h>
  
  extern DEVICE cpu_dev;
  extern DEVICE pag_dev;
  extern DEVICE tim_dev;
  extern DEVICE fe_dev;
  extern DEVICE uba_dev;
  extern DEVICE ptr_dev;
  extern DEVICE ptp_dev;
  extern DEVICE rp_dev;
  extern DEVICE tu_dev;
  extern DEVICE dz_dev;
  extern DEVICE ry_dev;
  extern DEVICE cr_dev;
  extern DEVICE lp20_dev;
  extern UNIT cpu_unit;
  extern REG cpu_reg[];
  extern d10 *M;
  extern a10 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-10";
  
  REG *sim_PC = &cpu_reg[0];
  
  int32 sim_emax = 1;
  
  DEVICE *sim_devices[] = { 
      &cpu_dev,
      &pag_dev,
      &tim_dev,
      &fe_dev,
      &uba_dev,
      &ptr_dev,
      &ptp_dev,
      &ry_dev,
      &lp20_dev,
      &cr_dev,
      &rp_dev,
      &tu_dev,
      &dz_dev,
      NULL
      };
  
  const char *sim_stop_messages[] = {
      "Unknown error",
      "HALT instruction",
      "Breakpoint",
      "Illegal instruction",
      "Illegal interrupt instruction",
      "Paging error in interrupt",
      "Zero vector table",
      "NXM on UPT/EPT reference",
      "Nested indirect address limit exceeded",
      "Nested XCT limit exceeded",
      "Invalid I/O controller",
      "Address stop",
      "Panic stop"
       };
  
  /* Binary loader, supports RIM10, SAV, EXE */
  
  #define FMT_R   1                                       /* RIM10 */
  #define FMT_S   2                                       /* SAV */
  #define FMT_E   3                                       /* EXE */
  
  #define EXE_DIR 01776                                   /* EXE directory */
  #define EXE_VEC 01775                                   /* EXE entry vec */
  #define EXE_PDV 01774                                   /* EXE ignored */
  #define EXE_END 01777                                   /* EXE end
  
  /* RIM10 loader
  
     RIM10 format is a binary paper tape format (all data frames
     are 200 or greater).  It consists of blocks containing
  
          -count,,origin-1
          word
          :
          word
          checksum (includes IOWD)
          :
          JRST start
  */
  
  d10 getrimw (FILE *fileref)
  {
  int32 i, tmp;
  d10 word;
  
  word = 0;
  for (i = 0; i < 6;) {
      if ((tmp = getc (fileref)) == EOF)
          return -1;
      if (tmp & 0200) {
          word = (word << 6) | ((d10) tmp & 077);
          i++;
          }
      }
  return word;
  }
  
  t_stat load_rim (FILE *fileref)
  {
  d10 count, cksm, data;
  a10 pa;
  int32 op;
  
  for ( ;; ) {                                            /* loop until JRST */
      count = cksm = getrimw (fileref);                   /* get header */
      if (count < 0)                                      /* read err? */
          return SCPE_FMT;
      if (TSTS (count)) {                                 /* hdr = IOWD? */
          for ( ; TSTS (count); count = AOB (count)) {
              data = getrimw (fileref);                   /* get data wd */
              if (data < 0)
                  return SCPE_FMT;
              cksm = cksm + data;                         /* add to cksm */
              pa = ((a10) count + 1) & AMASK;             /* store */
              M[pa] = data;
              }                                           /* end for */
          data = getrimw (fileref);                       /* get cksm */
          if (data < 0)
              return SCPE_FMT;
          if ((cksm + data) & DMASK)                      /* test cksm */
              return SCPE_CSUM;
          }                                               /* end if count */
      else {
          op = GET_OP (count);                            /* not IOWD */
          if (op != OP_JRST)                              /* JRST? */
              return SCPE_FMT;
          saved_PC = (a10) count & AMASK;                 /* set PC */
          break;
          }                                               /* end else */
      }                                                   /* end for */
  return SCPE_OK;
  }
  
  /* SAV file loader
  
     SAV format is a disk file format (36b words).  It consists of
     blocks containing:
  
          -count,,origin-1
          word
          :
          word
          :
          JRST start
  */
  
  t_stat load_sav (FILE *fileref)
  {
  d10 count, data;
  a10 pa;
  int32 wc, op;
  
  for ( ;; ) {                                            /* loop */
      wc = fxread (&count, sizeof (d10), 1, fileref);     /* read IOWD */
      if (wc == 0)                                        /* done? */
          return SCPE_OK;
      if (TSTS (count)) {                                 /* IOWD? */
          for ( ; TSTS (count); count = AOB (count)) {
              wc = fxread (&data, sizeof (d10), 1, fileref);
              if (wc == 0)
                  return SCPE_FMT;
              pa = ((a10) count + 1) & AMASK;             /* store data */
              M[pa] = data;
              }                                           /* end for */
          }                                               /* end if  count*/
      else {
          op = GET_OP (count);                            /* not IOWD */
          if (op != OP_JRST)                              /* JRST? */
              return SCPE_FMT;
          saved_PC = (a10) count & AMASK;                 /* set PC */
          break;
          }                                               /* end else */
      }                                                   /* end for */
  return SCPE_OK;
  }
  
  /* EXE file loader
  
     EXE format is a disk file format (36b words).  It consists of
     blocks containing:
  
          block type,,total words = n
          n - 1 data words
  
     Block types are
  
          EXE_DIR (1776)  directory
          EXE_VEC (1775)  entry vector
          EXE_PDV (1774)  optional blocks
          EXE_END (1777)  end block
  
     The directory blocks are the most important and contain doubleword
     page loading information:
  
          word0<0:8>      =       flags
              <9:35>      =       page in file (0 if 0 page)
          word1<0:8>      =       repeat count - 1
              <9:35>      =       page in memory
  */
  
  #define DIRSIZ  (2 * PAG_SIZE)
  
  t_stat load_exe (FILE *fileref)
  {
  d10 data, dirbuf[DIRSIZ], pagbuf[PAG_SIZE], entbuf[2];
  int32 ndir, entvec, i, j, k, cont, bsz, bty, rpt, wc;
  int32 fpage, mpage;
  a10 ma;
  
  ndir = entvec = 0;                                      /* no dir, entvec */
  cont = 1;
  do {
      wc = fxread (&data, sizeof (d10), 1, fileref);      /* read blk hdr */
      if (wc == 0)                                        /* error? */
          return SCPE_FMT;
      bsz = (int32) ((data & RMASK) - 1);                 /* get count */
      if (bsz <= 0)                                       /* zero? */
          return SCPE_FMT;
      bty = (int32) LRZ (data);                           /* get type */
      switch (bty) {                                      /* case type */
  
      case EXE_DIR:                                       /* directory */
          if (ndir)                                       /* got one */
              return SCPE_FMT;
          ndir = fxread (dirbuf, sizeof (d10), bsz, fileref);
          if (ndir < bsz)                                 /* error */
              return SCPE_FMT;
          break;
  
      case EXE_PDV:                                       /* ??? */
          fseek (fileref, bsz * sizeof (d10), SEEK_CUR);
          break;
  
      case EXE_VEC:                                       /* entry vec */
          if (bsz != 2)                                   /* must be 2 wds */
              return SCPE_FMT;
          entvec = fxread (entbuf, sizeof (d10), bsz, fileref);
          if (entvec < 2)                                 /* error? */
              return SCPE_FMT;
          cont = 0;                                       /* stop */
          break;
  
      case EXE_END:                                       /* end */
          if (bsz != 0)                                   /* must be hdr */
              return SCPE_FMT;
          cont = 0;                                       /* stop */
          break;
  
      default:
          return SCPE_FMT;
          }                                               /* end switch */
      } while (cont);                                     /* end do */
  
  for (i = 0; i < ndir; i = i + 2) {                      /* loop thru dir */
      fpage = (int32) (dirbuf[i] & RMASK);                /* file page */
      mpage = (int32) (dirbuf[i + 1] & RMASK);            /* memory page */
      rpt = (int32) ((dirbuf[i + 1] >> 27) + 1);          /* repeat count */
      for (j = 0; j < rpt; j++, mpage++) {                /* loop thru rpts */
          if (fpage) {                                    /* file pages? */
              fseek (fileref, (fpage << PAG_V_PN) * sizeof (d10), SEEK_SET);
              wc = fxread (pagbuf, sizeof (d10), PAG_SIZE, fileref);
              if (wc < PAG_SIZE)
                  return SCPE_FMT;
              fpage++;
              }
          ma = mpage << PAG_V_PN;                         /* mem addr */
          for (k = 0; k < PAG_SIZE; k++, ma++) {          /* copy buf to mem */
              if (MEM_ADDR_NXM (ma))
                  return SCPE_NXM;
              M[ma] = fpage? (pagbuf[k] & DMASK): 0;
              }                                           /* end copy */
          }                                               /* end rpt */
      }                                                   /* end directory */
  if (entvec && entbuf[1])
      saved_PC = (int32) entbuf[1] & RMASK;               /* start addr */
  return SCPE_OK;
  }
  
  /* Master loader */
  
  t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag)
  {
  d10 data;
  int32 wc, fmt;
  extern int32 sim_switches;
  
  fmt = 0;                                                /* no fmt */
  if (sim_switches & SWMASK ('R'))                        /* -r? */
      fmt = FMT_R;
  else if (sim_switches & SWMASK ('S'))                   /* -s? */
      fmt = FMT_S;
  else if (sim_switches & SWMASK ('E'))                   /* -e? */
      fmt = FMT_E;
  else if (match_ext (fnam, "RIM"))                       /* .RIM? */
      fmt = FMT_R;
  else if (match_ext (fnam, "SAV"))                       /* .SAV? */
      fmt = FMT_S;
  else if (match_ext (fnam, "EXE"))                       /* .EXE? */
      fmt = FMT_E;
  else {
      wc = fxread (&data, sizeof (d10), 1, fileref);      /* read hdr */
      if (wc == 0)                                        /* error? */
          return SCPE_FMT;
      if (LRZ (data) == EXE_DIR)                          /* EXE magic? */
          fmt = FMT_E;
      else if (TSTS (data))                               /* SAV magic? */
          fmt = FMT_S;
      fseek (fileref, 0, SEEK_SET);                       /* rewind */
      }
  
  switch (fmt) {                                          /* case fmt */
  
      case FMT_R:                                         /* RIM */
          return load_rim (fileref);
  
      case FMT_S:                                         /* SAV */
          return load_sav (fileref);
  
      case FMT_E:                                         /* EXE */
          return load_exe (fileref);
          }
  
  printf ("Can't determine load file format\n");
  return SCPE_FMT;
  }
  
  /* Symbol tables */
  
  #define I_V_FL          39                              /* inst class */
  #define I_M_FL          03                              /* class mask */
  #define I_ITS           004000000000000                 /* ITS flag */
  #define I_AC            000000000000000                 /* AC, address */
  #define I_OP            010000000000000                 /* address only */
  #define I_IO            020000000000000                 /* classic I/O */
  #define I_V_AC          00
  #define I_V_OP          01
  #define I_V_IO          02
  
  static const d10 masks[] = {
   0777000000000, 0777740000000,
   0700340000000, 0777777777777
   }; 
  
  static const char *opcode[] = {
  "XCTR", "XCTI",                                         /* ITS only */
  "IORDI", "IORDQ", "IORD", "IOWR", "IOWRI", "IOWRQ",
  "IORDBI", "IORDBQ", "IORDB", "IOWRB", "IOWRBI", "IOWRBQ",
  "CLRCSH", "RDPCST", "WRPCST",
  "SDBR1", "SDBR2", "SDBR3", "SDBR4", "SPM",
  "LDBR1", "LDBR2", "LDBR3", "LDBR4", "LPMR",
  
  "PORTAL", "JRSTF", "HALT",                              /* AC defines op */
  "XJRSTF", "XJEN", "XPCW",
  "JEN", "SFM", "XJRST", "IBP",
  "JFOV", "JCRY1", "JCRY0", "JCRY", "JOV",
  
  "APRID", "WRAPR", "RDAPR", "WRPI", "RDPI", "RDUBR", "CLRPT", "WRUBR",
  "WREBR", "RDEBR",
  "RDSPB", "RDCSB", "RDPUR", "RDCSTM", "RDTIM", "RDINT", "RDHSB",
  "WRSPB", "WRCSB", "WRPUR", "WRCSTM", "WRTIM", "WRINT", "WRHSB",
  
            "LUUO01", "LUUO02", "LUUO03", "LUUO04", "LUUO05", "LUUO06", "LUUO07",
  "LUUO10", "LUUO11", "LUUO12", "LUUO13", "LUUO14", "LUUO15", "LUUO16", "LUUO17",
  "LUUO20", "LUUO21", "LUUO22", "LUUO23", "LUUO24", "LUUO25", "LUUO26", "LUUO27",
  "LUUO30", "LUUO31", "LUUO32", "LUUO33", "LUUO34", "LUUO35", "LUUO36", "LUUO37",
  "MUUO40", "MUUO41", "MUUO42", "MUUO43", "MUUO44", "MUUO45", "MUUO46", "MUUO47",
  "MUUO50", "MUUO51", "MUUO52", "MUUO53", "MUUO54", "MUUO55", "MUUO56", "MUUO57",
  "MUUO60", "MUUO61", "MUUO62", "MUUO63", "MUUO64", "MUUO65", "MUUO66", "MUUO67",
  "MUUO70", "MUUO71", "MUUO72", "MUUO73", "MUUO74", "MUUO75", "MUUO76", "MUUO77",
  
  "UJEN",         "GFAD", "GFSB", "JSYS", "ADJSP", "GFMP", "GFDV ", 
  "DFAD", "DFSB", "DFMP", "DFDV", "DADD", "DSUB", "DMUL", "DDIV",
  "DMOVE", "DMOVN", "FIX", "EXTEND", "DMOVEM", "DMOVNM", "FIXR", "FLTR",
  "UFA", "DFN", "FSC", "ADJBP", "ILDB", "LDB", "IDPB", "DPB",
  "FAD", "FADL", "FADM", "FADB", "FADR", "FADRL", "FADRM", "FADRB",
  "FSB", "FSBL", "FSBM", "FSBB", "FSBR", "FSBRL", "FSBRM", "FSBRB",
  "FMP", "FMPL", "FMPM", "FMPB", "FMPR", "FMPRL", "FMPRM", "FMPRB",
  "FDV", "FDVL", "FDVM", "FDVB", "FDVR", "FDVRL", "FDVRM", "FDVRB",
  
  "MOVE", "MOVEI", "MOVEM", "MOVES", "MOVS", "MOVSI", "MOVSM", "MOVSS",
  "MOVN", "MOVNI", "MOVNM", "MOVNS", "MOVM", "MOVMI", "MOVMM", "MOVMS",
  "IMUL", "IMULI", "IMULM", "IMULB", "MUL", "MULI", "MULM", "MULB",
  "IDIV", "IDIVI", "IDIVM", "IDIVB", "DIV", "DIVI", "DIVM", "DIVB",
  "ASH", "ROT", "LSH", "JFFO", "ASHC", "ROTC", "LSHC", "CIRC",
  "EXCH", "BLT", "AOBJP", "AOBJN", "JRST", "JFCL", "XCT", "MAP", 
  "PUSHJ", "PUSH", "POP", "POPJ", "JSR", "JSP", "JSA", "JRA",
  "ADD", "ADDI", "ADDM", "ADDB", "SUB", "SUBI", "SUBM", "SUBB",
  
  "CAI", "CAIL", "CAIE", "CAILE", "CAIA", "CAIGE", "CAIN", "CAIG",
  "CAM", "CAML", "CAME", "CAMLE", "CAMA", "CAMGE", "CAMN", "CAMG",
  "JUMP", "JUMPL", "JUMPE", "JUMPLE", "JUMPA", "JUMPGE", "JUMPN", "JUMPG",
  "SKIP", "SKIPL", "SKIPE", "SKIPLE", "SKIPA", "SKIPGE", "SKIPN", "SKIPG",
  "AOJ", "AOJL", "AOJE", "AOJLE", "AOJA", "AOJGE", "AOJN", "AOJG",
  "AOS", "AOSL", "AOSE", "AOSLE", "AOSA", "AOSGE", "AOSN", "AOSG",
  "SOJ", "SOJL", "SOJE", "SOJLE", "SOJA", "SOJGE", "SOJN", "SOJG",
  "SOS", "SOSL", "SOSE", "SOSLE", "SOSA", "SOSGE", "SOSN", "SOSG",
  
  "SETZ", "SETZI", "SETZM", "SETZB", "AND", "ANDI", "ANDM", "ANDB", 
  "ANDCA", "ANDCAI", "ANDCAM", "ANDCAB", "SETM", "SETMI", "SETMM", "SETMB",
  "ANDCM", "ANDCMI", "ANDCMM", "ANDCMB", "SETA", "SETAI", "SETAM", "SETAB",
  "XOR", "XORI", "XORM", "XORB", "IOR", "IORI", "IORM", "IORB",  
  "ANDCB", "ANDCBI", "ANDCBM", "ANDCBB", "EQV", "EQVI", "EQVM", "EQVB", 
  "SETCA", "SETCAI", "SETCAM", "SETCAB", "ORCA", "ORCAI", "ORCAM", "ORCAB",
  "SETCM", "SETCMI", "SETCMM", "SETCMB", "ORCM", "ORCMI", "ORCMM", "ORCMB",
  "ORCB", "ORCBI", "ORCBM", "ORCBB", "SETO", "SETOI", "SETOM", "SETOB",
  
  "HLL", "HLLI", "HLLM", "HLLS", "HRL", "HRLI", "HRLM", "HRLS", 
  "HLLZ", "HLLZI", "HLLZM", "HLLZS", "HRLZ", "HRLZI", "HRLZM", "HRLZS",
  "HLLO", "HLLOI", "HLLOM", "HLLOS", "HRLO", "HRLOI", "HRLOM", "HRLOS",
  "HLLE", "HLLEI", "HLLEM", "HLLES", "HRLE", "HRLEI", "HRLEM", "HRLES",
  "HRR", "HRRI", "HRRM", "HRRS", "HLR", "HLRI", "HLRM", "HLRS",
  "HRRZ", "HRRZI", "HRRZM", "HRRZS", "HLRZ", "HLRZI", "HLRZM", "HLRZS",
  "HRRO", "HRROI", "HRROM", "HRROS", "HLRO", "HLROI", "HLROM", "HLROS",
  "HRRE", "HRREI", "HRREM", "HRRES", "HLRE", "HLREI", "HLREM", "HLRES",
  
  "TRN", "TLN", "TRNE", "TLNE", "TRNA", "TLNA", "TRNN", "TLNN",
  "TDN", "TSN", "TDNE", "TSNE", "TDNA", "TSNA", "TDNN", "TSNN",
  "TRZ", "TLZ", "TRZE", "TLZE", "TRZA", "TLZA", "TRZN", "TLZN",
  "TDZ", "TSZ", "TDZE", "TSZE", "TDZA", "TSZA", "TDZN", "TSZN",
  "TRC", "TLC", "TRCE", "TLCE", "TRCA", "TLCA", "TRCN", "TLCN",
  "TDC", "TSC", "TDCE", "TSCE", "TDCA", "TSCA", "TDCN", "TSCN",
  "TRO", "TLO", "TROE", "TLOE", "TROA", "TLOA", "TRON", "TLON",
  "TDO", "TSO", "TDOE", "TSOE", "TDOA", "TSOA", "TDON", "TSON",
  
  "UMOVE", "UMOVEM",                                      /* KS10 I/O */
  "TIOE", "TION", "RDIO", "WRIO",
  "BSIO", "BCIO", "BLTBU", "BLTUB",
  "TIOEB", "TIONB", "RDIOB", "WRIOB",
  "BSIOB", "BCIOB", 
  
  "BLKI", "DATAI", "BLKO", "DATAO",                       /* classic I/O */
  "CONO",  "CONI", "CONSZ", "CONSO",
  
  "CLEAR", "CLEARI", "CLEARM", "CLEARB",
  "OR", "ORI", "ORM", "ORB", "XMOVEI", "XHLLI",           /* alternate ops */
  
          "CMPSL", "CMPSE", "CMPSLE",                     /* extended ops */
  "EDIT", "CMPSGE", "CMPSN", "CMPSG",
  "CVTDBO", "CVTDBT", "CVTBDO", "CVTBDT",
  "MOVSO", "MOVST", "MOVSLJ", "MOVSRJ",
  "XBLT", "GSNGL", "GDBLE", "GDFIX",
  "GFIX", "GDFIXR", "GFIXR", "DGFLTR",
  "GFLTR", "GFSC",
  
  NULL
  };
  
  static const d10 opc_val[] = {
   0102000000000+I_AC+I_ITS, 0103000000000+I_AC+I_ITS,
   0710000000000+I_AC+I_ITS, 0711000000000+I_AC+I_ITS, 0712000000000+I_AC+I_ITS,
   0713000000000+I_AC+I_ITS, 0714000000000+I_AC+I_ITS, 0715000000000+I_AC+I_ITS,
   0720000000000+I_AC+I_ITS, 0721000000000+I_AC+I_ITS, 0722000000000+I_AC+I_ITS,
   0723000000000+I_AC+I_ITS, 0724000000000+I_AC+I_ITS, 0725000000000+I_AC+I_ITS,
   0701000000000+I_OP+I_ITS, 0701440000000+I_OP+I_ITS, 0701540000000+I_OP+I_ITS,
   0702000000000+I_OP+I_ITS, 0702040000000+I_OP+I_ITS,
   0702100000000+I_OP+I_ITS, 0702140000000+I_OP+I_ITS, 0702340000000+I_OP+I_ITS,
   0702400000000+I_OP+I_ITS, 0702440000000+I_OP+I_ITS,
   0702500000000+I_OP+I_ITS, 0702540000000+I_OP+I_ITS, 0702740000000+I_OP+I_ITS,
   
   0254040000000+I_OP, 0254100000000+I_OP,
   0254200000000+I_OP, 0254240000000+I_OP, 0254300000000+I_OP, 0254340000000+I_OP,
   0254500000000+I_OP, 0254600000000+I_OP, 0254640000000+I_OP, 0133000000000+I_OP,
   0255040000000+I_OP, 0255100000000+I_OP, 0255200000000+I_OP, 0255300000000+I_OP,
   0255400000000+I_OP,
  
   0700000000000+I_OP, 0700200000000+I_OP, 0700240000000+I_OP, 0700600000000+I_OP,
   0700640000000+I_OP, 0701040000000+I_OP, 0701100000000+I_OP, 0701140000000+I_OP,
   0701200000000+I_OP, 0701240000000+I_OP,
   0702000000000+I_OP, 0702040000000+I_OP, 0702100000000+I_OP, 0702140000000+I_OP,
   0702200000000+I_OP, 0702240000000+I_OP, 0702300000000+I_OP,
   0702400000000+I_OP, 0702440000000+I_OP, 0702500000000+I_OP, 0702540000000+I_OP,
   0702600000000+I_OP, 0702640000000+I_OP, 0702700000000+I_OP,
  
                       0001000000000+I_AC, 0002000000000+I_AC, 0003000000000+I_AC,
   0004000000000+I_AC, 0005000000000+I_AC, 0006000000000+I_AC, 0007000000000+I_AC,
   0010000000000+I_AC, 0011000000000+I_AC, 0012000000000+I_AC, 0013000000000+I_AC,
   0014000000000+I_AC, 0015000000000+I_AC, 0016000000000+I_AC, 0017000000000+I_AC,
   0020000000000+I_AC, 0021000000000+I_AC, 0022000000000+I_AC, 0023000000000+I_AC,
   0024000000000+I_AC, 0025000000000+I_AC, 0026000000000+I_AC, 0027000000000+I_AC,
   0030000000000+I_AC, 0031000000000+I_AC, 0032000000000+I_AC, 0033000000000+I_AC,
   0034000000000+I_AC, 0035000000000+I_AC, 0036000000000+I_AC, 0037000000000+I_AC,
   0040000000000+I_AC, 0041000000000+I_AC, 0042000000000+I_AC, 0043000000000+I_AC,
   0044000000000+I_AC, 0045000000000+I_AC, 0046000000000+I_AC, 0047000000000+I_AC,
   0050000000000+I_AC, 0051000000000+I_AC, 0052000000000+I_AC, 0053000000000+I_AC,
   0054000000000+I_AC, 0055000000000+I_AC, 0056000000000+I_AC, 0057000000000+I_AC,
   0060000000000+I_AC, 0061000000000+I_AC, 0062000000000+I_AC, 0063000000000+I_AC,
   0064000000000+I_AC, 0065000000000+I_AC, 0066000000000+I_AC, 0067000000000+I_AC,
   0070000000000+I_AC, 0071000000000+I_AC, 0072000000000+I_AC, 0073000000000+I_AC,
   0074000000000+I_AC, 0075000000000+I_AC, 0076000000000+I_AC, 0077000000000+I_AC,
  
   0100000000000+I_AC,                     0102000000000+I_AC, 0103000000000+I_AC,
   0104000000000+I_AC, 0105000000000+I_AC, 0106000000000+I_AC, 0107000000000+I_AC,
   0110000000000+I_AC, 0111000000000+I_AC, 0112000000000+I_AC, 0113000000000+I_AC,
   0114000000000+I_AC, 0115000000000+I_AC, 0116000000000+I_AC, 0117000000000+I_AC,
   0120000000000+I_AC, 0121000000000+I_AC, 0122000000000+I_AC, 0123000000000+I_AC,
   0124000000000+I_AC, 0125000000000+I_AC, 0126000000000+I_AC, 0127000000000+I_AC,
   0130000000000+I_AC, 0131000000000+I_AC, 0132000000000+I_AC, 0133000000000+I_AC,
   0134000000000+I_AC, 0135000000000+I_AC, 0136000000000+I_AC, 0137000000000+I_AC,
   0140000000000+I_AC, 0141000000000+I_AC, 0142000000000+I_AC, 0143000000000+I_AC,
   0144000000000+I_AC, 0145000000000+I_AC, 0146000000000+I_AC, 0147000000000+I_AC,
   0150000000000+I_AC, 0151000000000+I_AC, 0152000000000+I_AC, 0153000000000+I_AC,
   0154000000000+I_AC, 0155000000000+I_AC, 0156000000000+I_AC, 0157000000000+I_AC,
   0160000000000+I_AC, 0161000000000+I_AC, 0162000000000+I_AC, 0163000000000+I_AC,
   0164000000000+I_AC, 0165000000000+I_AC, 0166000000000+I_AC, 0167000000000+I_AC,
   0170000000000+I_AC, 0171000000000+I_AC, 0172000000000+I_AC, 0173000000000+I_AC,
   0174000000000+I_AC, 0175000000000+I_AC, 0176000000000+I_AC, 0177000000000+I_AC,
  
   0200000000000+I_AC, 0201000000000+I_AC, 0202000000000+I_AC, 0203000000000+I_AC,
   0204000000000+I_AC, 0205000000000+I_AC, 0206000000000+I_AC, 0207000000000+I_AC,
   0210000000000+I_AC, 0211000000000+I_AC, 0212000000000+I_AC, 0213000000000+I_AC,
   0214000000000+I_AC, 0215000000000+I_AC, 0216000000000+I_AC, 0217000000000+I_AC,
   0220000000000+I_AC, 0221000000000+I_AC, 0222000000000+I_AC, 0223000000000+I_AC,
   0224000000000+I_AC, 0225000000000+I_AC, 0226000000000+I_AC, 0227000000000+I_AC,
   0230000000000+I_AC, 0231000000000+I_AC, 0232000000000+I_AC, 0233000000000+I_AC,
   0234000000000+I_AC, 0235000000000+I_AC, 0236000000000+I_AC, 0237000000000+I_AC,
   0240000000000+I_AC, 0241000000000+I_AC, 0242000000000+I_AC, 0243000000000+I_AC,
   0244000000000+I_AC, 0245000000000+I_AC, 0246000000000+I_AC, 0247000000000+I_AC+I_ITS,
   0250000000000+I_AC, 0251000000000+I_AC, 0252000000000+I_AC, 0253000000000+I_AC,
   0254000000000+I_AC, 0255000000000+I_AC, 0256000000000+I_AC, 0257000000000+I_AC,
   0260000000000+I_AC, 0261000000000+I_AC, 0262000000000+I_AC, 0263000000000+I_AC,
   0264000000000+I_AC, 0265000000000+I_AC, 0266000000000+I_AC, 0267000000000+I_AC,
   0270000000000+I_AC, 0271000000000+I_AC, 0272000000000+I_AC, 0273000000000+I_AC,
   0274000000000+I_AC, 0275000000000+I_AC, 0276000000000+I_AC, 0277000000000+I_AC,
  
   0300000000000+I_AC, 0301000000000+I_AC, 0302000000000+I_AC, 0303000000000+I_AC,
   0304000000000+I_AC, 0305000000000+I_AC, 0306000000000+I_AC, 0307000000000+I_AC,
   0310000000000+I_AC, 0311000000000+I_AC, 0312000000000+I_AC, 0313000000000+I_AC,
   0314000000000+I_AC, 0315000000000+I_AC, 0316000000000+I_AC, 0317000000000+I_AC,
   0320000000000+I_AC, 0321000000000+I_AC, 0322000000000+I_AC, 0323000000000+I_AC,
   0324000000000+I_AC, 0325000000000+I_AC, 0326000000000+I_AC, 0327000000000+I_AC,
   0330000000000+I_AC, 0331000000000+I_AC, 0332000000000+I_AC, 0333000000000+I_AC,
   0334000000000+I_AC, 0335000000000+I_AC, 0336000000000+I_AC, 0337000000000+I_AC,
   0340000000000+I_AC, 0341000000000+I_AC, 0342000000000+I_AC, 0343000000000+I_AC,
   0344000000000+I_AC, 0345000000000+I_AC, 0346000000000+I_AC, 0347000000000+I_AC,
   0350000000000+I_AC, 0351000000000+I_AC, 0352000000000+I_AC, 0353000000000+I_AC,
   0354000000000+I_AC, 0355000000000+I_AC, 0356000000000+I_AC, 0357000000000+I_AC,
   0360000000000+I_AC, 0361000000000+I_AC, 0362000000000+I_AC, 0363000000000+I_AC,
   0364000000000+I_AC, 0365000000000+I_AC, 0366000000000+I_AC, 0367000000000+I_AC,
   0370000000000+I_AC, 0371000000000+I_AC, 0372000000000+I_AC, 0373000000000+I_AC,
   0374000000000+I_AC, 0375000000000+I_AC, 0376000000000+I_AC, 0377000000000+I_AC,
  
   0400000000000+I_AC, 0401000000000+I_AC, 0402000000000+I_AC, 0403000000000+I_AC,
   0404000000000+I_AC, 0405000000000+I_AC, 0406000000000+I_AC, 0407000000000+I_AC,
   0410000000000+I_AC, 0411000000000+I_AC, 0412000000000+I_AC, 0413000000000+I_AC,
   0414000000000+I_AC, 0415000000000+I_AC, 0416000000000+I_AC, 0417000000000+I_AC,
   0420000000000+I_AC, 0421000000000+I_AC, 0422000000000+I_AC, 0423000000000+I_AC,
   0424000000000+I_AC, 0425000000000+I_AC, 0426000000000+I_AC, 0427000000000+I_AC,
   0430000000000+I_AC, 0431000000000+I_AC, 0432000000000+I_AC, 0433000000000+I_AC,
   0434000000000+I_AC, 0435000000000+I_AC, 0436000000000+I_AC, 0437000000000+I_AC,
   0440000000000+I_AC, 0441000000000+I_AC, 0442000000000+I_AC, 0443000000000+I_AC,
   0444000000000+I_AC, 0445000000000+I_AC, 0446000000000+I_AC, 0447000000000+I_AC,
   0450000000000+I_AC, 0451000000000+I_AC, 0452000000000+I_AC, 0453000000000+I_AC,
   0454000000000+I_AC, 0455000000000+I_AC, 0456000000000+I_AC, 0457000000000+I_AC,
   0460000000000+I_AC, 0461000000000+I_AC, 0462000000000+I_AC, 0463000000000+I_AC,
   0464000000000+I_AC, 0465000000000+I_AC, 0466000000000+I_AC, 0467000000000+I_AC,
   0470000000000+I_AC, 0471000000000+I_AC, 0472000000000+I_AC, 0473000000000+I_AC,
   0474000000000+I_AC, 0475000000000+I_AC, 0476000000000+I_AC, 0477000000000+I_AC,
  
   0500000000000+I_AC, 0501000000000+I_AC, 0502000000000+I_AC, 0503000000000+I_AC,
   0504000000000+I_AC, 0505000000000+I_AC, 0506000000000+I_AC, 0507000000000+I_AC,
   0510000000000+I_AC, 0511000000000+I_AC, 0512000000000+I_AC, 0513000000000+I_AC,
   0514000000000+I_AC, 0515000000000+I_AC, 0516000000000+I_AC, 0517000000000+I_AC,
   0520000000000+I_AC, 0521000000000+I_AC, 0522000000000+I_AC, 0523000000000+I_AC,
   0524000000000+I_AC, 0525000000000+I_AC, 0526000000000+I_AC, 0527000000000+I_AC,
   0530000000000+I_AC, 0531000000000+I_AC, 0532000000000+I_AC, 0533000000000+I_AC,
   0534000000000+I_AC, 0535000000000+I_AC, 0536000000000+I_AC, 0537000000000+I_AC,
   0540000000000+I_AC, 0541000000000+I_AC, 0542000000000+I_AC, 0543000000000+I_AC,
   0544000000000+I_AC, 0545000000000+I_AC, 0546000000000+I_AC, 0547000000000+I_AC,
   0550000000000+I_AC, 0551000000000+I_AC, 0552000000000+I_AC, 0553000000000+I_AC,
   0554000000000+I_AC, 0555000000000+I_AC, 0556000000000+I_AC, 0557000000000+I_AC,
   0560000000000+I_AC, 0561000000000+I_AC, 0562000000000+I_AC, 0563000000000+I_AC,
   0564000000000+I_AC, 0565000000000+I_AC, 0566000000000+I_AC, 0567000000000+I_AC,
   0570000000000+I_AC, 0571000000000+I_AC, 0572000000000+I_AC, 0573000000000+I_AC,
   0574000000000+I_AC, 0575000000000+I_AC, 0576000000000+I_AC, 0577000000000+I_AC,
  
   0600000000000+I_AC, 0601000000000+I_AC, 0602000000000+I_AC, 0603000000000+I_AC,
   0604000000000+I_AC, 0605000000000+I_AC, 0606000000000+I_AC, 0607000000000+I_AC,
   0610000000000+I_AC, 0611000000000+I_AC, 0612000000000+I_AC, 0613000000000+I_AC,
   0614000000000+I_AC, 0615000000000+I_AC, 0616000000000+I_AC, 0617000000000+I_AC,
   0620000000000+I_AC, 0621000000000+I_AC, 0622000000000+I_AC, 0623000000000+I_AC,
   0624000000000+I_AC, 0625000000000+I_AC, 0626000000000+I_AC, 0627000000000+I_AC,
   0630000000000+I_AC, 0631000000000+I_AC, 0632000000000+I_AC, 0633000000000+I_AC,
   0634000000000+I_AC, 0635000000000+I_AC, 0636000000000+I_AC, 0637000000000+I_AC,
   0640000000000+I_AC, 0641000000000+I_AC, 0642000000000+I_AC, 0643000000000+I_AC,
   0644000000000+I_AC, 0645000000000+I_AC, 0646000000000+I_AC, 0647000000000+I_AC,
   0650000000000+I_AC, 0651000000000+I_AC, 0652000000000+I_AC, 0653000000000+I_AC,
   0654000000000+I_AC, 0655000000000+I_AC, 0656000000000+I_AC, 0657000000000+I_AC,
   0660000000000+I_AC, 0661000000000+I_AC, 0662000000000+I_AC, 0663000000000+I_AC,
   0664000000000+I_AC, 0665000000000+I_AC, 0666000000000+I_AC, 0667000000000+I_AC,
   0670000000000+I_AC, 0671000000000+I_AC, 0672000000000+I_AC, 0673000000000+I_AC,
   0674000000000+I_AC, 0675000000000+I_AC, 0676000000000+I_AC, 0677000000000+I_AC,
  
   0704000000000+I_AC, 0705000000000+I_AC,
   0710000000000+I_AC, 0711000000000+I_AC, 0712000000000+I_AC, 0713000000000+I_AC,
   0714000000000+I_AC, 0715000000000+I_AC, 0716000000000+I_AC, 0717000000000+I_AC,
   0720000000000+I_AC, 0721000000000+I_AC, 0722000000000+I_AC, 0723000000000+I_AC,
   0724000000000+I_AC, 0725000000000+I_AC,
  
   0700000000000+I_IO, 0700040000000+I_IO, 0700100000000+I_IO, 0700140000000+I_IO,
   0700200000000+I_IO, 0700240000000+I_IO, 0700300000000+I_IO, 0700340000000+I_IO,
  
   0400000000000+I_AC, 0401000000000+I_AC, 0402000000000+I_AC, 0403000000000+I_AC,
   0434000000000+I_AC, 0435000000000+I_AC, 0436000000000+I_AC, 0437000000000+I_AC,
   0415000000000+I_AC, 0501000000000+I_AC,
   
                       0001000000000+I_AC, 0002000000000+I_AC, 0003000000000+I_AC,
   0004000000000+I_AC, 0005000000000+I_AC, 0006000000000+I_AC, 0007000000000+I_AC,
   0010000000000+I_AC, 0011000000000+I_AC, 0012000000000+I_AC, 0013000000000+I_AC,
   0014000000000+I_AC, 0015000000000+I_AC, 0016000000000+I_AC, 0017000000000+I_AC,
   0020000000000+I_AC, 0021000000000+I_AC, 0022000000000+I_AC, 0023000000000+I_AC,
   0024000000000+I_AC, 0025000000000+I_AC, 0026000000000+I_AC, 0027000000000+I_AC,
   0030000000000+I_AC, 0031000000000+I_AC,
   -1
   };
  
  #define NUMDEV  6
  
  static const char *devnam[NUMDEV] = {
   "APR", "PI", "PAG", "CCA", "TIM", "MTR"
   };
  
  /* Symbolic decode
  
     Inputs:
          *of     =       output stream
          addr    =       current PC
          *val    =       pointer to values
          *uptr   =       pointer to unit
          sw      =       switches
     Outputs:
          return  =       status code
  */
  
  #define FMTASC(x) ((x) < 040)? "<%03o>": "%c", (x)
  #define SIXTOASC(x) ((x) + 040)
  
  t_stat fprint_sym (FILE *of, t_addr addr, t_value *val,
      UNIT *uptr, int32 sw)
  {
  int32 i, j, c, cflag, ac, xr, y, dev;
  d10 inst;
  
  inst = val[0];
  cflag = (uptr == NULL) || (uptr == &cpu_unit);
  if (sw & SWMASK ('A')) {                                /* ASCII? */
      if (inst > 0377)
          return SCPE_ARG;
      fprintf (of, FMTASC ((int32) (inst & 0177)));
      return SCPE_OK;
      }
  if (sw & SWMASK ('C')) {                                /* character? */
      for (i = 30; i >= 0; i = i - 6) {
          c = (int32) ((inst >> i) & 077);
          fprintf (of, "%c", SIXTOASC (c));
  		}    
      return SCPE_OK;
      }
  if (sw & SWMASK ('P')) {                                /* packed? */
      for (i = 29; i >= 0; i = i - 7) {
          c = (int32) ((inst >> i) & 0177);
          fprintf (of, FMTASC (c));
  		}
      return SCPE_OK;
      }
  if (!(sw & SWMASK ('M')))
      return SCPE_ARG;
  
  /* Instruction decode */
  
  ac = GET_AC (inst);
  xr = GET_XR (inst);
  y = GET_ADDR (inst);
  dev = GET_DEV (inst);
  for (i = 0; opc_val[i] >= 0; i++) {                     /* loop thru ops */
      j = (int32) ((opc_val[i] >> I_V_FL) & I_M_FL);      /* get class */
      if (((opc_val[i] & DMASK) == (inst & masks[j])) &&  /* match? */
              (((opc_val[i] & I_ITS) == 0) || Q_ITS)) {
          fprintf (of, "%s ", opcode[i]);                 /* opcode */
          switch (j) {                                    /* case on class */
  
          case I_V_AC:                                    /* AC + address */
              fprintf (of, "%-o,", ac);                   /* print AC, fall thru */
          case I_V_OP:                                    /* address only */
              if (inst & INST_IND)
                  fprintf (of, "@");
              if (xr)
                  fprintf (of, "%-o(%-o)", y, xr);
              else fprintf (of, "%-o", y);
              break;
  
          case I_V_IO:                                    /* I/O */
              if (dev < NUMDEV)
                  fprintf (of, "%s,", devnam[dev]);
              else fprintf (of, "%-o,", dev);
              if (inst & INST_IND)
                  fprintf (of, "@");
              if (xr)
                  fprintf (of, "%-o(%-o)", y, xr);
              else fprintf (of, "%-o", y);
              break;
              }                                           /* end case */
          return SCPE_OK;
          }                                               /* end if */
      }                                                   /* end for */
  return SCPE_ARG;
  }
  
  /* Get operand, including indirect and index
  
     Inputs:
          *cptr   =       pointer to input string
          *status =       pointer to error status
     Outputs:
          val     =       output value
  */
  
  t_value get_opnd (char *cptr, t_stat *status)
  {
  int32 sign = 0;
  t_value val, xr = 0, ind = 0;
  char *tptr;
  
  *status = SCPE_ARG;                                     /* assume fail */
  if (*cptr == '@') {
      ind = INST_IND;
      cptr++;
      }   
  if (*cptr == '+')
      cptr++;
  else if (*cptr == '-') {
      sign = 1;
      cptr++;
      }
  val = strtotv (cptr, &tptr, 8);
  if (val > 0777777)
      return 0;
  if (sign)
      val = (~val + 1) & 0777777;
  cptr = tptr;
  if (*cptr == '(') {
      cptr++;
      xr = strtotv (cptr, &tptr, 8);
      if ((cptr == tptr) || (*tptr != ')') ||
          (xr > AC_NUM) || (xr == 0))
          return 0;
      cptr = ++tptr;
      }
  if (*cptr == 0)
      *status = SCPE_OK;
  return (ind | (xr << 18) | val);
  }
  
  /* 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 cflag, i, j;
  t_value ac, dev;
  t_stat r;
  char gbuf[CBUFSIZE];
  
  cflag = (uptr == NULL) || (uptr == &cpu_unit);
  while (isspace (*cptr)) cptr++;
  for (i = 0; i < 6; i++) {
      if (cptr[i] == 0) {
          for (j = i + 1; j <= 6; j++) cptr[j] = 0;
          break;
          }
      }
  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];
      return SCPE_OK;
      }
  if ((sw & SWMASK ('C')) || ((*cptr == '"') && cptr++)) { /* sixbit string? */
      if (cptr[0] == 0)                                   /* must have 1 char */
          return SCPE_ARG;
      for (i = 0; i < 6; i++) {
          val[0] = (val[0] << 6);
          if (cptr[i]) val[0] = val[0] |
              ((t_value) ((cptr[i] + 040) & 077));
          }
      return SCPE_OK;
      }
  if ((sw & SWMASK ('P')) || ((*cptr == '#') && cptr++)) { /* packed string? */
      if (cptr[0] == 0)                                   /* must have 1 char */
          return SCPE_ARG;
      for (i = 0; i < 5; i++)
          val[0] = (val[0] << 7) | ((t_value) cptr[i]);
      val[0] = val[0] << 1;
      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 = (int32) ((opc_val[i] >> I_V_FL) & I_M_FL);          /* get class */
  switch (j) {                                            /* case on class */
  
      case I_V_AC:                                        /* AC + operand */
          if (strchr (cptr, ',')) {                       /* AC specified? */
              cptr = get_glyph (cptr, gbuf, ',');         /* get glyph */
              if (gbuf[0]) {                              /* can be omitted */
                  ac = get_uint (gbuf, 8, AC_NUM - 1, &r);
                  if (r != SCPE_OK)
                      return SCPE_ARG;
                  val[0] = val[0] | (ac << INST_V_AC);
                  }
              }                                           /* fall through */
      case I_V_OP:                                        /* operand */
          cptr = get_glyph (cptr, gbuf, 0);
          val[0] = val[0] | get_opnd (gbuf, &r);
          if (r != SCPE_OK)
              return SCPE_ARG;
          break;
  
      case I_V_IO:                                        /* I/O */
          cptr = get_glyph (cptr, gbuf, ',');             /* get glyph */
          for (dev = 0; (dev < NUMDEV) && (strcmp (devnam[dev], gbuf) != 0); dev++);
          if (dev >= NUMDEV) {
              dev = get_uint (gbuf, 8, INST_M_DEV, &r);
              if (r != SCPE_OK)
                  return SCPE_ARG;
              }
          val[0] = val[0] | (dev << INST_V_DEV);
          cptr = get_glyph (cptr, gbuf, 0);
          val[0] = val[0] | get_opnd (gbuf, &r);
          if (r != SCPE_OK)
              return SCPE_ARG;
          break;
          }                                               /* end case */
  
  if (*cptr != 0)                                         /* junk at end? */
      return SCPE_ARG;
  return SCPE_OK;
  }
  