/*  altairz80_sys.c: MITS Altair system interface

    Copyright (c) 2002-2007, Peter Schorn

    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
    PETER SCHORN 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 Peter Schorn shall not
    be used in advertising or otherwise to promote the sale, use or other dealings
    in this Software without prior written authorization from Peter Schorn.

    Based on work by Charles E Owen (c) 1997
    Disassembler from Marat Fayzullin ((c) 1995, 1996, 1997 - Commercial use prohibited)
*/

#include <ctype.h>
#include "altairz80_defs.h"

extern UNIT cpu_unit;
extern REG cpu_reg[];
extern DEVICE cpu_dev;
extern DEVICE sio_dev;
extern DEVICE simh_device;
extern DEVICE ptr_dev;
extern DEVICE ptp_dev;
extern DEVICE dsk_dev;
extern DEVICE hdsk_dev;
extern DEVICE net_dev;

int32 fprint_sym(FILE *of, int32 addr, uint32 *val, UNIT *uptr, int32 sw);
int32 parse_sym(char *cptr, int32 addr, UNIT *uptr, uint32 *val, int32 sw);

/* SCP data structures
    sim_name            simulator name string
    sim_PC              pointer to saved PC register descriptor
    sim_emax            number of words needed for examine
    sim_devices         array of pointers to simulated devices
    sim_stop_messages   array of pointers to stop messages
*/

char        sim_name[]      = "Altair 8800 (Z80)";
REG         *sim_PC         = &cpu_reg[0];
int32       sim_emax        = 4;
DEVICE      *sim_devices[]  = {
    &cpu_dev, &sio_dev, &simh_device, &ptr_dev, &ptp_dev, &dsk_dev, &hdsk_dev, &net_dev, NULL
};

char memoryAccessMessage[80];
const char *sim_stop_messages[] = {
    "HALT instruction",
    "Breakpoint",
    memoryAccessMessage,
    "Invalid Opcode"
};

static char *const Mnemonics8080[] = {
/*  0/8             1/9             2/A             3/B             4/C             5/D             6/E             7/F                         */
    "NOP",          "LXI B,#h",     "STAX B",       "INX B",        "INR B",        "DCR B",        "MVI B,*h",     "RLC",          /*  00-07   */
    "DB 09h",       "DAD B",        "LDAX B",       "DCX B",        "INR C",        "DCR C",        "MVI C,*h",     "RRC",          /*  08-0f   */
    "DB 10h",       "LXI D,#h",     "STAX D",       "INX D",        "INR D",        "DCR D",        "MVI D,*h",     "RAL",          /*  10-17   */
    "DB 18h",       "DAD D",        "LDAX D",       "DCX D",        "INR E",        "DCR E",        "MVI E,*h",     "RAR",          /*  18-1f   */
    "DB 20h",       "LXI H,#h",     "SHLD #h",      "INX H",        "INR H",        "DCR H",        "MVI H,*h",     "DAA",          /*  20-27   */
    "DB 28h",       "DAD H",        "LHLD #h",      "DCX H",        "INR L",        "DCR L",        "MVI L,*h",     "CMA",          /*  28-2f   */
    "DB 30h",       "LXI SP,#h",    "STA #h",       "INX SP",       "INR M",        "DCR M",        "MVI M,*h",     "STC",          /*  30-37   */
    "DB 38h",       "DAD SP",       "LDA #h",       "DCX SP",       "INR A",        "DCR A",        "MVI A,*h",     "CMC",          /*  38-3f   */
    "MOV B,B",      "MOV B,C",      "MOV B,D",      "MOV B,E",      "MOV B,H",      "MOV B,L",      "MOV B,M",      "MOV B,A",      /*  40-47   */
    "MOV C,B",      "MOV C,C",      "MOV C,D",      "MOV C,E",      "MOV C,H",      "MOV C,L",      "MOV C,M",      "MOV C,A",      /*  48-4f   */
    "MOV D,B",      "MOV D,C",      "MOV D,D",      "MOV D,E",      "MOV D,H",      "MOV D,L",      "MOV D,M",      "MOV D,A",      /*  50-57   */
    "MOV E,B",      "MOV E,C",      "MOV E,D",      "MOV E,E",      "MOV E,H",      "MOV E,L",      "MOV E,M",      "MOV E,A",      /*  58-5f   */
    "MOV H,B",      "MOV H,C",      "MOV H,D",      "MOV H,E",      "MOV H,H",      "MOV H,L",      "MOV H,M",      "MOV H,A",      /*  60-67   */
    "MOV L,B",      "MOV L,C",      "MOV L,D",      "MOV L,E",      "MOV L,H",      "MOV L,L",      "MOV L,M",      "MOV L,A",      /*  68-6f   */
    "MOV M,B",      "MOV M,C",      "MOV M,D",      "MOV M,E",      "MOV M,H",      "MOV M,L",      "HLT",          "MOV M,A",      /*  70-77   */
    "MOV A,B",      "MOV A,C",      "MOV A,D",      "MOV A,E",      "MOV A,H",      "MOV A,L",      "MOV A,M",      "MOV A,A",      /*  78-7f   */
    "ADD B",        "ADD C",        "ADD D",        "ADD E",        "ADD H",        "ADD L",        "ADD M",        "ADD A",        /*  80-87   */
    "ADC B",        "ADC C",        "ADC D",        "ADC E",        "ADC H",        "ADC L",        "ADC M",        "ADC A",        /*  88-8f   */
    "SUB B",        "SUB C",        "SUB D",        "SUB E",        "SUB H",        "SUB L",        "SUB M",        "SUB A",        /*  90-97   */
    "SBB B",        "SBB C",        "SBB D",        "SBB E",        "SBB H",        "SBB L",        "SBB M",        "SBB A",        /*  98-9f   */
    "ANA B",        "ANA C",        "ANA D",        "ANA E",        "ANA H",        "ANA L",        "ANA M",        "ANA A",        /*  a0-a7   */
    "XRA B",        "XRA C",        "XRA D",        "XRA E",        "XRA H",        "XRA L",        "XRA M",        "XRA A",        /*  a8-af   */
    "ORA B",        "ORA C",        "ORA D",        "ORA E",        "ORA H",        "ORA L",        "ORA M",        "ORA A",        /*  b0-b7   */
    "CMP B",        "CMP C",        "CMP D",        "CMP E",        "CMP H",        "CMP L",        "CMP M",        "CMP A",        /*  b8-bf   */
    "RNZ",          "POP B",        "JNZ #h",       "JMP #h",       "CNZ #h",       "PUSH B",       "ADI *h",       "RST 0",        /*  c0-c7   */
    "RZ",           "RET",          "JZ #h",        "DB CBh",       "CZ #h",        "CALL #h",      "ACI *h",       "RST 1",        /*  c8-cf   */
    "RNC",          "POP D",        "JNC #h",       "OUT *h",       "CNC #h",       "PUSH D",       "SUI *h",       "RST 2",        /*  d0-d7   */
    "RC",           "DB D9h",       "JC #h",        "IN *h",        "CC #h",        "DB DDh",       "SBI *h",       "RST 3",        /*  d8-df   */
    "RPO",          "POP H",        "JPO #h",       "XTHL",         "CPO #h",       "PUSH H",       "ANI *h",       "RST 4",        /*  e0-e7   */
    "RPE",          "PCHL",         "JPE #h",       "XCHG",         "CPE #h",       "DB EDh",       "XRI *h",       "RST 5",        /*  e8-ef   */
    "RP",           "POP PSW",      "JP #h",        "DI",           "CP #h",        "PUSH PSW",     "ORI *h",       "RST 6",        /*  f0-f7   */
    "RM",           "SPHL",         "JM #h",        "EI",           "CM #h",        "DB FDh",       "CPI *h",       "RST 7"         /*  f8-ff   */
 };

static char *const MnemonicsZ80[256] = {
/*  0/8             1/9             2/A             3/B             4/C             5/D             6/E             7/F                         */
    "NOP",          "LD BC,#h",     "LD (BC),A",    "INC BC",       "INC B",        "DEC B",        "LD B,*h",      "RLCA",         /*  00-07   */
    "EX AF,AF'",    "ADD HL,BC",    "LD A,(BC)",    "DEC BC",       "INC C",        "DEC C",        "LD C,*h",      "RRCA",         /*  08-0f   */
    "DJNZ $h",      "LD DE,#h",     "LD (DE),A",    "INC DE",       "INC D",        "DEC D",        "LD D,*h",      "RLA",          /*  10-17   */
    "JR $h",        "ADD HL,DE",    "LD A,(DE)",    "DEC DE",       "INC E",        "DEC E",        "LD E,*h",      "RRA",          /*  18-1f   */
    "JR NZ,$h",     "LD HL,#h",     "LD (#h),HL",   "INC HL",       "INC H",        "DEC H",        "LD H,*h",      "DAA",          /*  20-27   */
    "JR Z,$h",      "ADD HL,HL",    "LD HL,(#h)",   "DEC HL",       "INC L",        "DEC L",        "LD L,*h",      "CPL",          /*  28-2f   */
    "JR NC,$h",     "LD SP,#h",     "LD (#h),A",    "INC SP",       "INC (HL)",     "DEC (HL)",     "LD (HL),*h",   "SCF",          /*  30-37   */
    "JR C,$h",      "ADD HL,SP",    "LD A,(#h)",    "DEC SP",       "INC A",        "DEC A",        "LD A,*h",      "CCF",          /*  38-3f   */
    "LD B,B",       "LD B,C",       "LD B,D",       "LD B,E",       "LD B,H",       "LD B,L",       "LD B,(HL)",    "LD B,A",       /*  40-47   */
    "LD C,B",       "LD C,C",       "LD C,D",       "LD C,E",       "LD C,H",       "LD C,L",       "LD C,(HL)",    "LD C,A",       /*  48-4f   */
    "LD D,B",       "LD D,C",       "LD D,D",       "LD D,E",       "LD D,H",       "LD D,L",       "LD D,(HL)",    "LD D,A",       /*  50-57   */
    "LD E,B",       "LD E,C",       "LD E,D",       "LD E,E",       "LD E,H",       "LD E,L",       "LD E,(HL)",    "LD E,A",       /*  58-5f   */
    "LD H,B",       "LD H,C",       "LD H,D",       "LD H,E",       "LD H,H",       "LD H,L",       "LD H,(HL)",    "LD H,A",       /*  60-67   */
    "LD L,B",       "LD L,C",       "LD L,D",       "LD L,E",       "LD L,H",       "LD L,L",       "LD L,(HL)",    "LD L,A",       /*  68-6f   */
    "LD (HL),B",    "LD (HL),C",    "LD (HL),D",    "LD (HL),E",    "LD (HL),H",    "LD (HL),L",    "HALT",         "LD (HL),A",    /*  70-77   */
    "LD A,B",       "LD A,C",       "LD A,D",       "LD A,E",       "LD A,H",       "LD A,L",       "LD A,(HL)",    "LD A,A",       /*  78-7f   */
    "ADD A,B",      "ADD A,C",      "ADD A,D",      "ADD A,E",      "ADD A,H",      "ADD A,L",      "ADD A,(HL)",   "ADD A,A",      /*  80-87   */
    "ADC A,B",      "ADC A,C",      "ADC A,D",      "ADC A,E",      "ADC A,H",      "ADC A,L",      "ADC A,(HL)",   "ADC A,A",      /*  88-8f   */
    "SUB B",        "SUB C",        "SUB D",        "SUB E",        "SUB H",        "SUB L",        "SUB (HL)",     "SUB A",        /*  90-97   */
    "SBC A,B",      "SBC A,C",      "SBC A,D",      "SBC A,E",      "SBC A,H",      "SBC A,L",      "SBC A,(HL)",   "SBC A,A",      /*  98-9f   */
    "AND B",        "AND C",        "AND D",        "AND E",        "AND H",        "AND L",        "AND (HL)",     "AND A",        /*  a0-a7   */
    "XOR B",        "XOR C",        "XOR D",        "XOR E",        "XOR H",        "XOR L",        "XOR (HL)",     "XOR A",        /*  a8-af   */
    "OR B",         "OR C",         "OR D",         "OR E",         "OR H",         "OR L",         "OR (HL)",      "OR A",         /*  b0-b7   */
    "CP B",         "CP C",         "CP D",         "CP E",         "CP H",         "CP L",         "CP (HL)",      "CP A",         /*  b8-bf   */
    "RET NZ",       "POP BC",       "JP NZ,#h",     "JP #h",        "CALL NZ,#h",   "PUSH BC",      "ADD A,*h",     "RST 00h",      /*  c0-c7   */
    "RET Z",        "RET",          "JP Z,#h",      "PFX_CB",       "CALL Z,#h",    "CALL #h",      "ADC A,*h",     "RST 08h",      /*  c8-cf   */
    "RET NC",       "POP DE",       "JP NC,#h",     "OUT (*h),A",   "CALL NC,#h",   "PUSH DE",      "SUB *h",       "RST 10h",      /*  d0-d7   */
    "RET C",        "EXX",          "JP C,#h",      "IN A,(*h)",    "CALL C,#h",    "PFX_DD",       "SBC A,*h",     "RST 18h",      /*  d8-df   */
    "RET PO",       "POP HL",       "JP PO,#h",     "EX (SP),HL",   "CALL PO,#h",   "PUSH HL",      "AND *h",       "RST 20h",      /*  e0-e7   */
    "RET PE",       "LD PC,HL",     "JP PE,#h",     "EX DE,HL",     "CALL PE,#h",   "PFX_ED",       "XOR *h",       "RST 28h",      /*  e8-ef   */
    "RET P",        "POP AF",       "JP P,#h",      "DI",           "CALL P,#h",    "PUSH AF",      "OR *h",        "RST 30h",      /*  f0-f7   */
    "RET M",        "LD SP,HL",     "JP M,#h",      "EI",           "CALL M,#h",    "PFX_FD",       "CP *h",        "RST 38h"       /*  f8-ff   */
};

static char *const MnemonicsCB[256] = {
/*  0/8             1/9             2/A             3/B             4/C             5/D             6/E             7/F                         */
    "RLC B",        "RLC C",        "RLC D",        "RLC E",        "RLC H",        "RLC L",        "RLC (HL)",     "RLC A",        /*  00-07   */
    "RRC B",        "RRC C",        "RRC D",        "RRC E",        "RRC H",        "RRC L",        "RRC (HL)",     "RRC A",        /*  08-0f   */
    "RL B",         "RL C",         "RL D",         "RL E",         "RL H",         "RL L",         "RL (HL)",      "RL A",         /*  10-17   */
    "RR B",         "RR C",         "RR D",         "RR E",         "RR H",         "RR L",         "RR (HL)",      "RR A",         /*  18-1f   */
    "SLA B",        "SLA C",        "SLA D",        "SLA E",        "SLA H",        "SLA L",        "SLA (HL)",     "SLA A",        /*  20-27   */
    "SRA B",        "SRA C",        "SRA D",        "SRA E",        "SRA H",        "SRA L",        "SRA (HL)",     "SRA A",        /*  28-2f   */
    "SLL B",        "SLL C",        "SLL D",        "SLL E",        "SLL H",        "SLL L",        "SLL (HL)",     "SLL A",        /*  30-37   */
    "SRL B",        "SRL C",        "SRL D",        "SRL E",        "SRL H",        "SRL L",        "SRL (HL)",     "SRL A",        /*  38-3f   */
    "BIT 0,B",      "BIT 0,C",      "BIT 0,D",      "BIT 0,E",      "BIT 0,H",      "BIT 0,L",      "BIT 0,(HL)",   "BIT 0,A",      /*  40-47   */
    "BIT 1,B",      "BIT 1,C",      "BIT 1,D",      "BIT 1,E",      "BIT 1,H",      "BIT 1,L",      "BIT 1,(HL)",   "BIT 1,A",      /*  48-4f   */
    "BIT 2,B",      "BIT 2,C",      "BIT 2,D",      "BIT 2,E",      "BIT 2,H",      "BIT 2,L",      "BIT 2,(HL)",   "BIT 2,A",      /*  50-57   */
    "BIT 3,B",      "BIT 3,C",      "BIT 3,D",      "BIT 3,E",      "BIT 3,H",      "BIT 3,L",      "BIT 3,(HL)",   "BIT 3,A",      /*  58-5f   */
    "BIT 4,B",      "BIT 4,C",      "BIT 4,D",      "BIT 4,E",      "BIT 4,H",      "BIT 4,L",      "BIT 4,(HL)",   "BIT 4,A",      /*  60-67   */
    "BIT 5,B",      "BIT 5,C",      "BIT 5,D",      "BIT 5,E",      "BIT 5,H",      "BIT 5,L",      "BIT 5,(HL)",   "BIT 5,A",      /*  68-6f   */
    "BIT 6,B",      "BIT 6,C",      "BIT 6,D",      "BIT 6,E",      "BIT 6,H",      "BIT 6,L",      "BIT 6,(HL)",   "BIT 6,A",      /*  70-77   */
    "BIT 7,B",      "BIT 7,C",      "BIT 7,D",      "BIT 7,E",      "BIT 7,H",      "BIT 7,L",      "BIT 7,(HL)",   "BIT 7,A",      /*  78-7f   */
    "RES 0,B",      "RES 0,C",      "RES 0,D",      "RES 0,E",      "RES 0,H",      "RES 0,L",      "RES 0,(HL)",   "RES 0,A",      /*  80-87   */
    "RES 1,B",      "RES 1,C",      "RES 1,D",      "RES 1,E",      "RES 1,H",      "RES 1,L",      "RES 1,(HL)",   "RES 1,A",      /*  88-8f   */
    "RES 2,B",      "RES 2,C",      "RES 2,D",      "RES 2,E",      "RES 2,H",      "RES 2,L",      "RES 2,(HL)",   "RES 2,A",      /*  90-97   */
    "RES 3,B",      "RES 3,C",      "RES 3,D",      "RES 3,E",      "RES 3,H",      "RES 3,L",      "RES 3,(HL)",   "RES 3,A",      /*  98-9f   */
    "RES 4,B",      "RES 4,C",      "RES 4,D",      "RES 4,E",      "RES 4,H",      "RES 4,L",      "RES 4,(HL)",   "RES 4,A",      /*  a0-a7   */
    "RES 5,B",      "RES 5,C",      "RES 5,D",      "RES 5,E",      "RES 5,H",      "RES 5,L",      "RES 5,(HL)",   "RES 5,A",      /*  a8-af   */
    "RES 6,B",      "RES 6,C",      "RES 6,D",      "RES 6,E",      "RES 6,H",      "RES 6,L",      "RES 6,(HL)",   "RES 6,A",      /*  b0-b7   */
    "RES 7,B",      "RES 7,C",      "RES 7,D",      "RES 7,E",      "RES 7,H",      "RES 7,L",      "RES 7,(HL)",   "RES 7,A",      /*  b8-bf   */
    "SET 0,B",      "SET 0,C",      "SET 0,D",      "SET 0,E",      "SET 0,H",      "SET 0,L",      "SET 0,(HL)",   "SET 0,A",      /*  c0-c7   */
    "SET 1,B",      "SET 1,C",      "SET 1,D",      "SET 1,E",      "SET 1,H",      "SET 1,L",      "SET 1,(HL)",   "SET 1,A",      /*  c8-cf   */
    "SET 2,B",      "SET 2,C",      "SET 2,D",      "SET 2,E",      "SET 2,H",      "SET 2,L",      "SET 2,(HL)",   "SET 2,A",      /*  d0-d7   */
    "SET 3,B",      "SET 3,C",      "SET 3,D",      "SET 3,E",      "SET 3,H",      "SET 3,L",      "SET 3,(HL)",   "SET 3,A",      /*  d8-df   */
    "SET 4,B",      "SET 4,C",      "SET 4,D",      "SET 4,E",      "SET 4,H",      "SET 4,L",      "SET 4,(HL)",   "SET 4,A",      /*  e0-e7   */
    "SET 5,B",      "SET 5,C",      "SET 5,D",      "SET 5,E",      "SET 5,H",      "SET 5,L",      "SET 5,(HL)",   "SET 5,A",      /*  e8-ef   */
    "SET 6,B",      "SET 6,C",      "SET 6,D",      "SET 6,E",      "SET 6,H",      "SET 6,L",      "SET 6,(HL)",   "SET 6,A",      /*  f0-f7   */
    "SET 7,B",      "SET 7,C",      "SET 7,D",      "SET 7,E",      "SET 7,H",      "SET 7,L",      "SET 7,(HL)",   "SET 7,A"       /*  f8-ff   */
};

static char *const MnemonicsED[256] = {
/*  0/8             1/9             2/A             3/B             4/C             5/D             6/E             7/F                         */
    "DB EDh,00h",   "DB EDh,01h",   "DB EDh,02h",   "DB EDh,03h",   "DB EDh,04h",   "DB EDh,05h",   "DB EDh,06h",   "DB EDh,07h",   /*  00-07   */
    "DB EDh,08h",   "DB EDh,09h",   "DB EDh,0Ah",   "DB EDh,0Bh",   "DB EDh,0Ch",   "DB EDh,0Dh",   "DB EDh,0Eh",   "DB EDh,0Fh",   /*  08-0f   */
    "DB EDh,10h",   "DB EDh,11h",   "DB EDh,12h",   "DB EDh,13h",   "DB EDh,14h",   "DB EDh,15h",   "DB EDh,16h",   "DB EDh,17h",   /*  10-17   */
    "DB EDh,18h",   "DB EDh,19h",   "DB EDh,1Ah",   "DB EDh,1Bh",   "DB EDh,1Ch",   "DB EDh,1Dh",   "DB EDh,1Eh",   "DB EDh,1Fh",   /*  18-1f   */
    "DB EDh,20h",   "DB EDh,21h",   "DB EDh,22h",   "DB EDh,23h",   "DB EDh,24h",   "DB EDh,25h",   "DB EDh,26h",   "DB EDh,27h",   /*  20-27   */
    "DB EDh,28h",   "DB EDh,29h",   "DB EDh,2Ah",   "DB EDh,2Bh",   "DB EDh,2Ch",   "DB EDh,2Dh",   "DB EDh,2Eh",   "DB EDh,2Fh",   /*  28-2f   */
    "DB EDh,30h",   "DB EDh,31h",   "DB EDh,32h",   "DB EDh,33h",   "DB EDh,34h",   "DB EDh,35h",   "DB EDh,36h",   "DB EDh,37h",   /*  30-37   */
    "DB EDh,38h",   "DB EDh,39h",   "DB EDh,3Ah",   "DB EDh,3Bh",   "DB EDh,3Ch",   "DB EDh,3Dh",   "DB EDh,3Eh",   "DB EDh,3Fh",   /*  38-3f   */
    "IN B,(C)",     "OUT (C),B",    "SBC HL,BC",    "LD (#h),BC",   "NEG",          "RETN",         "IM 0",         "LD I,A",       /*  40-47   */
    "IN C,(C)",     "OUT (C),C",    "ADC HL,BC",    "LD BC,(#h)",   "DB EDh,4Ch",   "RETI",         "DB EDh,4Eh",   "LD R,A",       /*  48-4f   */
    "IN D,(C)",     "OUT (C),D",    "SBC HL,DE",    "LD (#h),DE",   "DB EDh,54h",   "DB EDh,55h",   "IM 1",         "LD A,I",       /*  50-57   */
    "IN E,(C)",     "OUT (C),E",    "ADC HL,DE",    "LD DE,(#h)",   "DB EDh,5Ch",   "DB EDh,5Dh",   "IM 2",         "LD A,R",       /*  58-5f   */
    "IN H,(C)",     "OUT (C),H",    "SBC HL,HL",    "LD (#h),HL",   "DB EDh,64h",   "DB EDh,65h",   "DB EDh,66h",   "RRD",          /*  60-67   */
    "IN L,(C)",     "OUT (C),L",    "ADC HL,HL",    "LD HL,(#h)",   "DB EDh,6Ch",   "DB EDh,6Dh",   "DB EDh,6Eh",   "RLD",          /*  68-6f   */
    "IN F,(C)",     "DB EDh,71h",   "SBC HL,SP",    "LD (#h),SP",   "DB EDh,74h",   "DB EDh,75h",   "DB EDh,76h",   "DB EDh,77h",   /*  70-77   */
    "IN A,(C)",     "OUT (C),A",    "ADC HL,SP",    "LD SP,(#h)",   "DB EDh,7Ch",   "DB EDh,7Dh",   "DB EDh,7Eh",   "DB EDh,7Fh",   /*  78-7f   */
    "DB EDh,80h",   "DB EDh,81h",   "DB EDh,82h",   "DB EDh,83h",   "DB EDh,84h",   "DB EDh,85h",   "DB EDh,86h",   "DB EDh,87h",   /*  80-87   */
    "DB EDh,88h",   "DB EDh,89h",   "DB EDh,8Ah",   "DB EDh,8Bh",   "DB EDh,8Ch",   "DB EDh,8Dh",   "DB EDh,8Eh",   "DB EDh,8Fh",   /*  88-8f   */
    "DB EDh,90h",   "DB EDh,91h",   "DB EDh,92h",   "DB EDh,93h",   "DB EDh,94h",   "DB EDh,95h",   "DB EDh,96h",   "DB EDh,97h",   /*  90-97   */
    "DB EDh,98h",   "DB EDh,99h",   "DB EDh,9Ah",   "DB EDh,9Bh",   "DB EDh,9Ch",   "DB EDh,9Dh",   "DB EDh,9Eh",   "DB EDh,9Fh",   /*  98-9f   */
    "LDI",          "CPI",          "INI",          "OUTI",         "DB EDh,A4h",   "DB EDh,A5h",   "DB EDh,A6h",   "DB EDh,A7h",   /*  a0-a7   */
    "LDD",          "CPD",          "IND",          "OUTD",         "DB EDh,ACh",   "DB EDh,ADh",   "DB EDh,AEh",   "DB EDh,AFh",   /*  a8-af   */
    "LDIR",         "CPIR",         "INIR",         "OTIR",         "DB EDh,B4h",   "DB EDh,B5h",   "DB EDh,B6h",   "DB EDh,B7h",   /*  b0-b7   */
    "LDDR",         "CPDR",         "INDR",         "OTDR",         "DB EDh,BCh",   "DB EDh,BDh",   "DB EDh,BEh",   "DB EDh,BFh",   /*  b8-bf   */
    "DB EDh,C0h",   "DB EDh,C1h",   "DB EDh,C2h",   "DB EDh,C3h",   "DB EDh,C4h",   "DB EDh,C5h",   "DB EDh,C6h",   "DB EDh,C7h",   /*  c0-c7   */
    "DB EDh,C8h",   "DB EDh,C9h",   "DB EDh,CAh",   "DB EDh,CBh",   "DB EDh,CCh",   "DB EDh,CDh",   "DB EDh,CEh",   "DB EDh,CFh",   /*  c8-cf   */
    "DB EDh,D0h",   "DB EDh,D1h",   "DB EDh,D2h",   "DB EDh,D3h",   "DB EDh,D4h",   "DB EDh,D5h",   "DB EDh,D6h",   "DB EDh,D7h",   /*  d0-d7   */
    "DB EDh,D8h",   "DB EDh,D9h",   "DB EDh,DAh",   "DB EDh,DBh",   "DB EDh,DCh",   "DB EDh,DDh",   "DB EDh,DEh",   "DB EDh,DFh",   /*  d8-df   */
    "DB EDh,E0h",   "DB EDh,E1h",   "DB EDh,E2h",   "DB EDh,E3h",   "DB EDh,E4h",   "DB EDh,E5h",   "DB EDh,E6h",   "DB EDh,E7h",   /*  e0-e7   */
    "DB EDh,E8h",   "DB EDh,E9h",   "DB EDh,EAh",   "DB EDh,EBh",   "DB EDh,ECh",   "DB EDh,EDh",   "DB EDh,EEh",   "DB EDh,EFh",   /*  e8-ef   */
    "DB EDh,F0h",   "DB EDh,F1h",   "DB EDh,F2h",   "DB EDh,F3h",   "DB EDh,F4h",   "DB EDh,F5h",   "DB EDh,F6h",   "DB EDh,F7h",   /*  f0-f7   */
    "DB EDh,F8h",   "DB EDh,F9h",   "DB EDh,FAh",   "DB EDh,FBh",   "DB EDh,FCh",   "DB EDh,FDh",   "DB EDh,FEh",   "DB EDh,FFh"    /*  f8-ff   */
};

static char *const MnemonicsXX[256] = {
/*  0/8             1/9             2/A             3/B             4/C             5/D             6/E             7/F                         */
    "NOP",          "LD BC,#h",     "LD (BC),A",    "INC BC",       "INC B",        "DEC B",        "LD B,*h",      "RLCA",         /*  00-07   */
    "EX AF,AF'",    "ADD I%,BC",    "LD A,(BC)",    "DEC BC",       "INC C",        "DEC C",        "LD C,*h",      "RRCA",         /*  08-0f   */
    "DJNZ $h",      "LD DE,#h",     "LD (DE),A",    "INC DE",       "INC D",        "DEC D",        "LD D,*h",      "RLA",          /*  10-17   */
    "JR $h",        "ADD I%,DE",    "LD A,(DE)",    "DEC DE",       "INC E",        "DEC E",        "LD E,*h",      "RRA",          /*  18-1f   */
    "JR NZ,$h",     "LD I%,#h",     "LD (#h),I%",   "INC I%",       "INC I%H",      "DEC I%H",      "LD I%H,*h",    "DAA",          /*  20-27   */
    "JR Z,$h",      "ADD I%,I%",    "LD I%,(#h)",   "DEC I%",       "INC I%L",      "DEC I%L",      "LD I%L,*h",    "CPL",          /*  28-2f   */
    "JR NC,$h",     "LD SP,#h",     "LD (#h),A",    "INC SP",       "INC (I%+^h)",  "DEC (I%+^h)",  "LD (I%+^h),*h","SCF",          /*  30-37   */
    "JR C,$h",      "ADD I%,SP",    "LD A,(#h)",    "DEC SP",       "INC A",        "DEC A",        "LD A,*h",      "CCF",          /*  38-3f   */
    "LD B,B",       "LD B,C",       "LD B,D",       "LD B,E",       "LD B,I%H",     "LD B,I%L",     "LD B,(I%+^h)", "LD B,A",       /*  40-47   */
    "LD C,B",       "LD C,C",       "LD C,D",       "LD C,E",       "LD C,I%H",     "LD C,I%L",     "LD C,(I%+^h)", "LD C,A",       /*  48-4f   */
    "LD D,B",       "LD D,C",       "LD D,D",       "LD D,E",       "LD D,I%H",     "LD D,I%L",     "LD D,(I%+^h)", "LD D,A",       /*  50-57   */
    "LD E,B",       "LD E,C",       "LD E,D",       "LD E,E",       "LD E,I%H",     "LD E,I%L",     "LD E,(I%+^h)", "LD E,A",       /*  58-5f   */
    "LD I%H,B",     "LD I%H,C",     "LD I%H,D",     "LD I%H,E",     "LD I%H,I%H",   "LD I%H,I%L",   "LD H,(I%+^h)", "LD I%H,A",     /*  60-67   */
    "LD I%L,B",     "LD I%L,C",     "LD I%L,D",     "LD I%L,E",     "LD I%L,I%H",   "LD I%L,I%L",   "LD L,(I%+^h)", "LD I%L,A",     /*  68-6f   */
    "LD (I%+^h),B", "LD (I%+^h),C", "LD (I%+^h),D", "LD (I%+^h),E", "LD (I%+^h),H", "LD (I%+^h),L", "HALT",         "LD (I%+^h),A", /*  70-77   */
    "LD A,B",       "LD A,C",       "LD A,D",       "LD A,E",       "LD A,I%H",     "LD A,I%L",     "LD A,(I%+^h)", "LD A,A",       /*  78-7f   */
    "ADD A,B",      "ADD A,C",      "ADD A,D",      "ADD A,E",      "ADD A,I%H",    "ADD A,I%L",    "ADD A,(I%+^h)","ADD A,A",      /*  80-87   */
    "ADC A,B",      "ADC A,C",      "ADC A,D",      "ADC A,E",      "ADC A,I%H",    "ADC A,I%L",    "ADC A,(I%+^h)","ADC A,A",      /*  88-8f   */
    "SUB B",        "SUB C",        "SUB D",        "SUB E",        "SUB I%H",      "SUB I%L",      "SUB (I%+^h)",  "SUB A",        /*  90-97   */
    "SBC A,B",      "SBC A,C",      "SBC A,D",      "SBC A,E",      "SBC A,I%H",    "SBC A,I%L",    "SBC A,(I%+^h)","SBC A,A",      /*  98-9f   */
    "AND B",        "AND C",        "AND D",        "AND E",        "AND I%H",      "AND I%L",      "AND (I%+^h)",  "AND A",        /*  a0-a7   */
    "XOR B",        "XOR C",        "XOR D",        "XOR E",        "XOR I%H",      "XOR I%L",      "XOR (I%+^h)",  "XOR A",        /*  a8-af   */
    "OR B",         "OR C",         "OR D",         "OR E",         "OR I%H",       "OR I%L",       "OR (I%+^h)",   "OR A",         /*  b0-b7   */
    "CP B",         "CP C",         "CP D",         "CP E",         "CP I%H",       "CP I%L",       "CP (I%+^h)",   "CP A",         /*  b8-bf   */
    "RET NZ",       "POP BC",       "JP NZ,#h",     "JP #h",        "CALL NZ,#h",   "PUSH BC",      "ADD A,*h",     "RST 00h",      /*  c8-cf   */
    "RET Z",        "RET",          "JP Z,#h",      "PFX_CB",       "CALL Z,#h",    "CALL #h",      "ADC A,*h",     "RST 08h",      /*  c8-cf   */
    "RET NC",       "POP DE",       "JP NC,#h",     "OUT (*h),A",   "CALL NC,#h",   "PUSH DE",      "SUB *h",       "RST 10h",      /*  d0-d7   */
    "RET C",        "EXX",          "JP C,#h",      "IN A,(*h)",    "CALL C,#h",    "PFX_DD",       "SBC A,*h",     "RST 18h",      /*  d8-df   */
    "RET PO",       "POP I%",       "JP PO,#h",     "EX (SP),I%",   "CALL PO,#h",   "PUSH I%",      "AND *h",       "RST 20h",      /*  e0-e7   */
    "RET PE",       "LD PC,I%",     "JP PE,#h",     "EX DE,I%",     "CALL PE,#h",   "PFX_ED",       "XOR *h",       "RST 28h",      /*  e8-ef   */
    "RET P",        "POP AF",       "JP P,#h",      "DI",           "CALL P,#h",    "PUSH AF",      "OR *h",        "RST 30h",      /*  f0-f7   */
    "RET M",        "LD SP,I%",     "JP M,#h",      "EI",           "CALL M,#h",    "PFX_FD",       "CP *h",        "RST 38h"       /*  f8-ff   */
};

static char *const MnemonicsXCB[256] = {
/*0/8               1/9             2/A             3/B             4/C             5/D             6/E             7/F                         */
    "RLC B",        "RLC C",        "RLC D",        "RLC E",        "RLC H",        "RLC L",        "RLC (I%@h)",   "RLC A",        /*  00-07   */
    "RRC B",        "RRC C",        "RRC D",        "RRC E",        "RRC H",        "RRC L",        "RRC (I%@h)",   "RRC A",        /*  08-0f   */
    "RL B",         "RL C",         "RL D",         "RL E",         "RL H",         "RL L",         "RL (I%@h)",    "RL A",         /*  10-17   */
    "RR B",         "RR C",         "RR D",         "RR E",         "RR H",         "RR L",         "RR (I%@h)",    "RR A",         /*  18-1f   */
    "SLA B",        "SLA C",        "SLA D",        "SLA E",        "SLA H",        "SLA L",        "SLA (I%@h)",   "SLA A",        /*  20-27   */
    "SRA B",        "SRA C",        "SRA D",        "SRA E",        "SRA H",        "SRA L",        "SRA (I%@h)",   "SRA A",        /*  28-2f   */
    "SLL B",        "SLL C",        "SLL D",        "SLL E",        "SLL H",        "SLL L",        "SLL (I%@h)",   "SLL A",        /*  30-37   */
    "SRL B",        "SRL C",        "SRL D",        "SRL E",        "SRL H",        "SRL L",        "SRL (I%@h)",   "SRL A",        /*  38-3f   */
    "BIT 0,B",      "BIT 0,C",      "BIT 0,D",      "BIT 0,E",      "BIT 0,H",      "BIT 0,L",      "BIT 0,(I%@h)", "BIT 0,A",      /*  40-47   */
    "BIT 1,B",      "BIT 1,C",      "BIT 1,D",      "BIT 1,E",      "BIT 1,H",      "BIT 1,L",      "BIT 1,(I%@h)", "BIT 1,A",      /*  48-4f   */
    "BIT 2,B",      "BIT 2,C",      "BIT 2,D",      "BIT 2,E",      "BIT 2,H",      "BIT 2,L",      "BIT 2,(I%@h)", "BIT 2,A",      /*  50-57   */
    "BIT 3,B",      "BIT 3,C",      "BIT 3,D",      "BIT 3,E",      "BIT 3,H",      "BIT 3,L",      "BIT 3,(I%@h)", "BIT 3,A",      /*  58-5f   */
    "BIT 4,B",      "BIT 4,C",      "BIT 4,D",      "BIT 4,E",      "BIT 4,H",      "BIT 4,L",      "BIT 4,(I%@h)", "BIT 4,A",      /*  60-67   */
    "BIT 5,B",      "BIT 5,C",      "BIT 5,D",      "BIT 5,E",      "BIT 5,H",      "BIT 5,L",      "BIT 5,(I%@h)", "BIT 5,A",      /*  68-6f   */
    "BIT 6,B",      "BIT 6,C",      "BIT 6,D",      "BIT 6,E",      "BIT 6,H",      "BIT 6,L",      "BIT 6,(I%@h)", "BIT 6,A",      /*  70-77   */
    "BIT 7,B",      "BIT 7,C",      "BIT 7,D",      "BIT 7,E",      "BIT 7,H",      "BIT 7,L",      "BIT 7,(I%@h)", "BIT 7,A",      /*  78-7f   */
    "RES 0,B",      "RES 0,C",      "RES 0,D",      "RES 0,E",      "RES 0,H",      "RES 0,L",      "RES 0,(I%@h)", "RES 0,A",      /*  80-87   */
    "RES 1,B",      "RES 1,C",      "RES 1,D",      "RES 1,E",      "RES 1,H",      "RES 1,L",      "RES 1,(I%@h)", "RES 1,A",      /*  88-8f   */
    "RES 2,B",      "RES 2,C",      "RES 2,D",      "RES 2,E",      "RES 2,H",      "RES 2,L",      "RES 2,(I%@h)", "RES 2,A",      /*  90-97   */
    "RES 3,B",      "RES 3,C",      "RES 3,D",      "RES 3,E",      "RES 3,H",      "RES 3,L",      "RES 3,(I%@h)", "RES 3,A",      /*  98-9f   */
    "RES 4,B",      "RES 4,C",      "RES 4,D",      "RES 4,E",      "RES 4,H",      "RES 4,L",      "RES 4,(I%@h)", "RES 4,A",      /*  a0-a7   */
    "RES 5,B",      "RES 5,C",      "RES 5,D",      "RES 5,E",      "RES 5,H",      "RES 5,L",      "RES 5,(I%@h)", "RES 5,A",      /*  a8-af   */
    "RES 6,B",      "RES 6,C",      "RES 6,D",      "RES 6,E",      "RES 6,H",      "RES 6,L",      "RES 6,(I%@h)", "RES 6,A",      /*  b0-b7   */
    "RES 7,B",      "RES 7,C",      "RES 7,D",      "RES 7,E",      "RES 7,H",      "RES 7,L",      "RES 7,(I%@h)", "RES 7,A",      /*  b8-bf   */
    "SET 0,B",      "SET 0,C",      "SET 0,D",      "SET 0,E",      "SET 0,H",      "SET 0,L",      "SET 0,(I%@h)", "SET 0,A",      /*  c0-c7   */
    "SET 1,B",      "SET 1,C",      "SET 1,D",      "SET 1,E",      "SET 1,H",      "SET 1,L",      "SET 1,(I%@h)", "SET 1,A",      /*  c8-cf   */
    "SET 2,B",      "SET 2,C",      "SET 2,D",      "SET 2,E",      "SET 2,H",      "SET 2,L",      "SET 2,(I%@h)", "SET 2,A",      /*  d0-d7   */
    "SET 3,B",      "SET 3,C",      "SET 3,D",      "SET 3,E",      "SET 3,H",      "SET 3,L",      "SET 3,(I%@h)", "SET 3,A",      /*  d8-df   */
    "SET 4,B",      "SET 4,C",      "SET 4,D",      "SET 4,E",      "SET 4,H",      "SET 4,L",      "SET 4,(I%@h)", "SET 4,A",      /*  e0-e7   */
    "SET 5,B",      "SET 5,C",      "SET 5,D",      "SET 5,E",      "SET 5,H",      "SET 5,L",      "SET 5,(I%@h)", "SET 5,A",      /*  e8-ef   */
    "SET 6,B",      "SET 6,C",      "SET 6,D",      "SET 6,E",      "SET 6,H",      "SET 6,L",      "SET 6,(I%@h)", "SET 6,A",      /*  f0-f7   */
    "SET 7,B",      "SET 7,C",      "SET 7,D",      "SET 7,E",      "SET 7,H",      "SET 7,L",      "SET 7,(I%@h)", "SET 7,A"       /*  f8-ff   */
};

/*  Symbolic disassembler

    Inputs:
        *val            =   instructions to disassemble
        useZ80Mnemonics =   > 0 iff Z80 mnemonics are to be used
        addr            =   current PC
    Outputs:
        *S              =   output text

    DAsm is Copyright (C) Marat Fayzullin 1995,1996,1997
        You are not allowed to distribute this software
        commercially.

*/

static int32 DAsm(char *S, const uint32 *val, const int32 useZ80Mnemonics, const int32 addr) {
    char R[128], H[10], C = '\0', *T, *P;
    uint8 J = 0, Offset = 0;
    uint16 B = 0;

    if (useZ80Mnemonics) {
        switch(val[B]) {

            case 0xcb:
                B++;
                T = MnemonicsCB[val[B++]];
                break;

            case 0xed:
                B++;
                T = MnemonicsED[val[B++]];
                break;

            case 0xdd:

            case 0xfd:
                C = (val[B++] == 0xdd) ? 'X' : 'Y';
                if (val[B] == 0xcb) {
                    B++;
                    Offset = val[B++];
                    J = 1;
                    T = MnemonicsXCB[val[B++]];
                }
                else {
                    T = MnemonicsXX[val[B++]];
                }
                break;

            default:
                T = MnemonicsZ80[val[B++]];
        }
    }
    else {
        T = Mnemonics8080[val[B++]];
    }

    if ( (P = strchr(T, '^')) ) {
        strncpy(R, T, P - T);
        R[P - T] = '\0';
        sprintf(H, "%02X", val[B++]);
        strcat(R, H);
        strcat(R, P + 1);
    }
    else {
        strcpy(R, T);
    }
    if ( (P = strchr(R, '%')) ) {
        *P = C;
        if ( (P = strchr(P + 1, '%')) ) {
            *P = C;
        }
    }

    if ( (P = strchr(R, '*')) ) {
        strncpy(S, R, P - R);
        S[P - R] = '\0';
        sprintf(H, "%02X", val[B++]);
        strcat(S, H);
        strcat(S, P + 1);
    }
    else if ( (P = strchr(R, '@')) ) {
        strncpy(S, R, P - R);
        S[P - R] = '\0';
        if (!J) {
            Offset = val[B++];
        }
        strcat(S, Offset & 0x80 ? "-" : "+");
        J = Offset & 0x80 ? 256 - Offset : Offset;
        sprintf(H, "%02X", J);
        strcat(S, H);
        strcat(S, P + 1);
    }
    else if ( (P = strchr(R, '$')) ) {
        strncpy(S, R, P - R);
        S[P - R] = '\0';
        Offset = val[B++];
        sprintf(H, "%04X", addr + 2 + (Offset & 0x80 ? (Offset - 256) : Offset));
        strcat(S, H);
        strcat(S, P + 1);
    }
    else if ( (P = strchr(R, '#')) ) {
        strncpy(S, R, P - R);
        S[P - R] = '\0';
        sprintf(H, "%04X", val[B] + 256 * val[B + 1]);
        strcat(S, H);
        strcat(S, P + 1);
        B += 2;
    }
    else {
        strcpy(S, R);
    }
    return(B);
}

/*  Symbolic output

    Inputs:
        *of     =   output stream
        addr    =   current PC
        *val    =   pointer to values
        *uptr   =   pointer to unit
        sw      =   switches
    Outputs:
        status  =   error code
*/

int32 fprint_sym(FILE *of, int32 addr, uint32 *val, UNIT *uptr, int32 sw) {
    char disasm[128];
    int32 ch = val[0] & 0x7f;
    if (sw & (SWMASK('A') | SWMASK('C'))) {
        fprintf(of, ((0x20 <= ch) && (ch < 0x7f)) ? "'%c'" : "%02x", ch);
        return SCPE_OK;
    }
    if (!(sw & SWMASK('M'))) {
        return SCPE_ARG;
    }
    ch = DAsm(disasm, val, cpu_unit.flags & UNIT_CHIP, addr);
    fprintf(of, "%s", disasm);
    return 1 - ch;  /* need to return additional bytes */
}

/*  checkbase determines the base of the number (ch, *numString)
    and returns FALSE if the number is bad */
static int32 checkbase(char ch, const char *numString) {
    int32 decimal = (ch <= '9');
    if (toupper(ch) == 'H') {
        return FALSE;
    }
    while (isxdigit(ch = *numString++)) {
        if (ch > '9') {
            decimal = FALSE;
        }
    }
    return toupper(ch) == 'H' ? 16 : (decimal ? 10 : FALSE);
}

static int32 numok(char ch, const char **numString, const int32 minvalue,
        const int32 maxvalue, const int32 requireSign, int32 *result) {
    int32 sign = 1, value = 0, base;
    if (requireSign) {
        if (ch == '+') {
            ch = *(*numString)++;
        }
        else if (ch == '-') {
            sign = -1;
            ch = *(*numString)++;
        }
        else {
            return FALSE;
        }
    }
    if (!(base = checkbase(ch, *numString))) {
        return FALSE;
    }
    while (isxdigit(ch)) {
        value = base * value + ((ch <= '9') ? (ch - '0') : (toupper(ch) - 'A' + 10));
        ch = *(*numString)++;
    }
    if (toupper(ch) != 'H') {
        (*numString)--;
    }
    *result = value * sign;
    return (minvalue <= value) && (value <= maxvalue);
}

static int32 match(const char *pattern, const char *input, char *xyFirst, char *xy, int32 *number, int32 *star,
        int32 *at, int32 *hat, int32 *dollar) {
    char pat = *pattern++;
    char inp = *input++;
    while ((pat) && (inp)) {
        switch(pat) {

            case '_': /* patterns containing '_' should never match */
                return FALSE;

            case ',':
                if (inp == ' ') {
                    inp = *input++;
                    continue;
                }   /* otherwise fall through */

            case ' ':
                if (inp != pat) {
                    return FALSE;
                }
                pat = *pattern++;
                inp = *input++;
                while (inp == ' ') {
                    inp = *input++;
                }
                continue;

            case '%':
                inp = toupper(inp);
                if ((inp == 'X') || (inp == 'Y')) {
                    if (*xyFirst) { /* make sure that second '%' corresponds to first */
                        if (*xyFirst == inp) {
                            *xy = inp;
                        }
                        else {
                            return FALSE;
                        }
                    }
                    else { /* take note of first '%' for later */
                        *xyFirst = inp;
                        *xy = inp;
                    }
                }
                else {
                    return FALSE;
                }
                break;

            case '#':
                if (numok(inp, &input, 0, 65535, FALSE, number)) {
                    pattern++; /* skip h */
                }
                else {
                    return FALSE;
                }
                break;

            case '*':
                if (numok(inp, &input, 0, 255, FALSE, star)) {
                    pattern++; /* skip h */
                }
                else {
                    return FALSE;
                }
                break;

            case '@':
                if (numok(inp, &input, -128, 65535, TRUE, at)) {
                    pattern++; /* skip h */
                }
                else {
                    return FALSE;
                }
                break;

            case '$':
                if (numok(inp, &input, 0, 65535, FALSE, dollar)) {
                    pattern++; /* skip h */
                }
                else {
                    return FALSE;
                }
                break;

            case '^':
                if (numok(inp, &input, 0, 255, FALSE, hat)) {
                    pattern++; /* skip h */
                }
                else {
                    return FALSE;
                }
                break;

            default:
                if (toupper(pat) != toupper(inp)) {
                    return FALSE;
                }
        }
        pat = *pattern++;
        inp = *input++;
    }
    while (inp == ' ') {
        inp = *input++;
    }
    return (pat == 0) && (inp == 0);
}

static int32 checkXY(const char xy) {
    return xy == 'X' ? 0xdd : 0xfd; /* else is 'Y' */
}

static int32 parse_X80(const char *cptr, const int32 addr, uint32 *val, char *const Mnemonics[]) {
    char xyFirst = 0, xy;
    int32 op, number, star, at, hat, dollar;
    for (op = 0; op < 256; op++) {
        number = star = at = dollar = -129;
        if (match(Mnemonics[op], cptr, &xyFirst, &xy, &number, &star, &at, &hat, &dollar)) {
            val[0] = op;
            if (number >= 0) {
                val[1] = (0xff) & number;
                val[2] = (0xff) & (number >> 8);
                return -2;              /* two additional bytes returned    */
            }
            else if (star >= 0) {
                val[1] = (0xff) & star;
                return -1;              /* one additional byte returned     */
            }
            else if (at > -129) {
                if ((-128 <= at) && (at <= 127)) {
                    val[1] = (int8)(at);
                    return -1;          /* one additional byte returned     */
                }
                else {
                    return SCPE_ARG;
                }
            }
            else if (dollar >= 0) {
                dollar -= addr + 2;     /* relative translation             */
                if ((-128 <= dollar) && (dollar <= 127)) {
                    val[1] = (int8)(dollar);
                    return -1;          /* one additional byte returned     */
                }
                else {
                    return SCPE_ARG;
                }
            }
            else {
                return SCPE_OK;
            }
        }
    }
    if (Mnemonics == Mnemonics8080) {
        return SCPE_ARG;
    }

    for (op = 0; op < 256; op++) {
        if (match(MnemonicsCB[op], cptr, &xyFirst, &xy, &number, &star, &at, &hat, &dollar)) {
            val[0] = 0xcb;
            val[1] = op;
            return -1;                  /* one additional byte returned     */
        }
    }

    for (op = 0; op < 256; op++) {
        number = -1;
        if (match(MnemonicsED[op], cptr, &xyFirst, &xy, &number, &star, &at, &hat, &dollar)) {
            val[0] = 0xed;
            val[1] = op;
            if (number >= 0) {
                val[2] = (0xff) & number;
                val[3] = (0xff) & (number >> 8);
                return -3;              /* three additional bytes returned  */
            }
            else {
                return -1;              /* one additional byte returned     */
            }
        }
    }

    for (op = 0; op < 256; op++) {
        number = star = hat = -1;
        xy = 0;
        if (match(MnemonicsXX[op], cptr, &xyFirst, &xy, &number, &star, &at, &hat, &dollar)) {
            /* all matches must have contained a '%' character */
            if (!(val[0] = checkXY(xy))) {
                return SCPE_ARG;
            }
            val[1] = op;
            if (number >= 0) {
                val[2] = (0xff) & number;
                val[3] = (0xff) & (number >> 8);
                return -3;              /* three additional bytes returned  */
            }
            else if ((star >= 0) && (hat >= 0)) {
                val[2] = (0xff) & hat;
                val[3] = (0xff) & star;
                return -3;              /* three additional bytes returned  */
            }
            else if (star >= 0) {
                val[2] = (0xff) & star;
                return -2;              /* two additional bytes returned    */
            }
            else if (hat >= 0) {
                val[2] = (0xff) & hat;
                return -2;              /* two additional bytes returned    */
            }
            else {
                return -1;              /* one additional byte returned     */
            }
        }
    }

    for (op = 0; op < 256; op++) {
        at = -129;
        xy = 0;
        if (match(MnemonicsXCB[op], cptr, &xyFirst, &xy, &number, &star, &at, &hat, &dollar)) {
            /* all matches must have contained a '%' character */
            if (!(val[0] = checkXY(xy))) {
                return SCPE_ARG;
            }
            val[1] = 0xcb;
            if (at > -129) {
                val[2] = (int8) (at);
            }
            else {
                printf("Offset expected.\n");
                return SCPE_ARG;
            }
            val[3] = op;
            return -3;                  /* three additional bytes returned  */
        }
    }
    return SCPE_ARG;
}


/*  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
*/
int32 parse_sym(char *cptr, int32 addr, UNIT *uptr, uint32 *val, int32 sw) {
    while (isspace(*cptr)) cptr++;  /* absorb spaces            */
    if ((sw & (SWMASK('A') | SWMASK('C'))) || ((*cptr == '\'') && cptr++)) { /* ASCII char? */
        if (cptr[0] == 0) {
            return SCPE_ARG;            /* must have one char               */
        }
        val[0] = (uint32) cptr[0];
        return SCPE_OK;
    }
    return parse_X80(cptr, addr, val, cpu_unit.flags & UNIT_CHIP ? MnemonicsZ80 : Mnemonics8080);
}
