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1448 lines (1340 loc) · 30.2 KB
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/*
* Copyright 2001 by Arto Salmi and Joze Fabcic
* Copyright 2006-2008 by Brian Dominy <[email protected]>
*
* This file is part of GCC6809.
*
* GCC6809 is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GCC6809 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GCC6809; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "6809.h"
#include "monitor.h"
#include <ctype.h>
#include <signal.h>
/* The function call stack */
struct function_call fctab[MAX_FUNCTION_CALLS];
/* The top of the function call stack */
struct function_call *current_function_call;
/* Automatically break after executing this many instructions */
int auto_break_insn_count = 0;
int monitor_on = 0;
int dump_every_insn = 0;
enum addr_mode
{
_illegal, _implied, _imm_byte, _imm_word, _direct, _extended,
_indexed, _rel_byte, _rel_word, _reg_post, _sys_post, _usr_post
};
enum opcode
{
_undoc, _abx, _adca, _adcb, _adda, _addb, _addd, _anda, _andb,
_andcc, _asla, _aslb, _asl, _asra, _asrb, _asr, _bcc, _lbcc,
_bcs, _lbcs, _beq, _lbeq, _bge, _lbge, _bgt, _lbgt, _bhi,
_lbhi, _bita, _bitb, _ble, _lble, _bls, _lbls, _blt, _lblt,
_bmi, _lbmi, _bne, _lbne, _bpl, _lbpl, _bra, _lbra, _brn,
_lbrn, _bsr, _lbsr, _bvc, _lbvc, _bvs, _lbvs, _clra, _clrb,
_clr, _cmpa, _cmpb, _cmpd, _cmps, _cmpu, _cmpx, _cmpy, _coma,
_comb, _com, _cwai, _daa, _deca, _decb, _dec, _eora, _eorb,
_exg, _inca, _incb, _inc, _jmp, _jsr, _lda, _ldb, _ldd,
_lds, _ldu, _ldx, _ldy, _leas, _leau, _leax, _leay, _lsra,
_lsrb, _lsr, _mul, _nega, _negb, _neg, _nop, _ora, _orb,
_orcc, _pshs, _pshu, _puls, _pulu, _rola, _rolb, _rol, _rora,
_rorb, _ror, _rti, _rts, _sbca, _sbcb, _sex, _sta, _stb,
_std, _sts, _stu, _stx, _sty, _suba, _subb, _subd, _swi,
_swi2, _swi3, _sync, _tfr, _tsta, _tstb, _tst, _reset,
#ifdef H6309
_negd, _comd, _lsrd, _rord, _asrd, _rold, _decd, _incd, _tstd,
_clrd
#endif
};
char *mne[] = {
"???", "ABX", "ADCA", "ADCB", "ADDA", "ADDB", "ADDD", "ANDA", "ANDB",
"ANDCC", "ASLA", "ASLB", "ASL", "ASRA", "ASRB", "ASR", "BCC", "LBCC",
"BCS", "LBCS", "BEQ", "LBEQ", "BGE", "LBGE", "BGT", "LBGT", "BHI",
"LBHI", "BITA", "BITB", "BLE", "LBLE", "BLS", "LBLS", "BLT", "LBLT",
"BMI", "LBMI", "BNE", "LBNE", "BPL", "LBPL", "BRA", "LBRA", "BRN",
"LBRN", "BSR", "LBSR", "BVC", "LBVC", "BVS", "LBVS", "CLRA", "CLRB",
"CLR", "CMPA", "CMPB", "CMPD", "CMPS", "CMPU", "CMPX", "CMPY", "COMA",
"COMB", "COM", "CWAI", "DAA", "DECA", "DECB", "DEC", "EORA", "EORB",
"EXG", "INCA", "INCB", "INC", "JMP", "JSR", "LDA", "LDB", "LDD",
"LDS", "LDU", "LDX", "LDY", "LEAS", "LEAU", "LEAX", "LEAY", "LSRA",
"LSRB", "LSR", "MUL", "NEGA", "NEGB", "NEG", "NOP", "ORA", "ORB",
"ORCC", "PSHS", "PSHU", "PULS", "PULU", "ROLA", "ROLB", "ROL", "RORA",
"RORB", "ROR", "RTI", "RTS", "SBCA", "SBCB", "SEX", "STA", "STB",
"STD", "STS", "STU", "STX", "STY", "SUBA", "SUBB", "SUBD", "SWI",
"SWI2", "SWI3", "SYNC", "TFR", "TSTA", "TSTB", "TST", "RESET",
#ifdef H6309
"NEGD", "COMD", "LSRD", "RORD", "ASRD", "ROLD", "DECD",
"INCD", "TSTD", "CLRD",
#endif
};
typedef struct
{
UINT8 code;
UINT8 mode;
} opcode_t;
opcode_t codes[256] = {
{_neg, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_com, _direct},
{_lsr, _direct},
{_undoc, _illegal},
{_ror, _direct},
{_asr, _direct},
{_asl, _direct},
{_rol, _direct},
{_dec, _direct},
{_undoc, _illegal},
{_inc, _direct},
{_tst, _direct},
{_jmp, _direct},
{_clr, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_nop, _implied},
{_sync, _implied},
{_undoc, _illegal},
{_undoc, _illegal},
{_lbra, _rel_word},
{_lbsr, _rel_word},
{_undoc, _illegal},
{_daa, _implied},
{_orcc, _imm_byte},
{_undoc, _illegal},
{_andcc, _imm_byte},
{_sex, _implied},
{_exg, _reg_post},
{_tfr, _reg_post},
{_bra, _rel_byte},
{_brn, _rel_byte},
{_bhi, _rel_byte},
{_bls, _rel_byte},
{_bcc, _rel_byte},
{_bcs, _rel_byte},
{_bne, _rel_byte},
{_beq, _rel_byte},
{_bvc, _rel_byte},
{_bvs, _rel_byte},
{_bpl, _rel_byte},
{_bmi, _rel_byte},
{_bge, _rel_byte},
{_blt, _rel_byte},
{_bgt, _rel_byte},
{_ble, _rel_byte},
{_leax, _indexed},
{_leay, _indexed},
{_leas, _indexed},
{_leau, _indexed},
{_pshs, _sys_post},
{_puls, _sys_post},
{_pshu, _usr_post},
{_pulu, _usr_post},
{_undoc, _illegal},
{_rts, _implied},
{_abx, _implied},
{_rti, _implied},
{_cwai, _imm_byte},
{_mul, _implied},
{_reset, _implied},
{_swi, _implied},
{_nega, _implied},
{_undoc, _illegal},
{_undoc, _illegal},
{_coma, _implied},
{_lsra, _implied},
{_undoc, _illegal},
{_rora, _implied},
{_asra, _implied},
{_asla, _implied},
{_rola, _implied},
{_deca, _implied},
{_undoc, _illegal},
{_inca, _implied},
{_tsta, _implied},
{_undoc, _illegal},
{_clra, _implied},
{_negb, _implied},
{_undoc, _illegal},
{_undoc, _illegal},
{_comb, _implied},
{_lsrb, _implied},
{_undoc, _illegal},
{_rorb, _implied},
{_asrb, _implied},
{_aslb, _implied},
{_rolb, _implied},
{_decb, _implied},
{_undoc, _illegal},
{_incb, _implied},
{_tstb, _implied},
{_undoc, _illegal},
{_clrb, _implied},
{_neg, _indexed},
{_undoc, _illegal},
{_undoc, _illegal},
{_com, _indexed},
{_lsr, _indexed},
{_undoc, _illegal},
{_ror, _indexed},
{_asr, _indexed},
{_asl, _indexed},
{_rol, _indexed},
{_dec, _indexed},
{_undoc, _illegal},
{_inc, _indexed},
{_tst, _indexed},
{_jmp, _indexed},
{_clr, _indexed},
{_neg, _extended},
{_undoc, _illegal},
{_undoc, _illegal},
{_com, _extended},
{_lsr, _extended},
{_undoc, _illegal},
{_ror, _extended},
{_asr, _extended},
{_asl, _extended},
{_rol, _extended},
{_dec, _extended},
{_undoc, _illegal},
{_inc, _extended},
{_tst, _extended},
{_jmp, _extended},
{_clr, _extended},
{_suba, _imm_byte},
{_cmpa, _imm_byte},
{_sbca, _imm_byte},
{_subd, _imm_word},
{_anda, _imm_byte},
{_bita, _imm_byte},
{_lda, _imm_byte},
{_undoc, _illegal},
{_eora, _imm_byte},
{_adca, _imm_byte},
{_ora, _imm_byte},
{_adda, _imm_byte},
{_cmpx, _imm_word},
{_bsr, _rel_byte},
{_ldx, _imm_word},
{_undoc, _illegal},
{_suba, _direct},
{_cmpa, _direct},
{_sbca, _direct},
{_subd, _direct},
{_anda, _direct},
{_bita, _direct},
{_lda, _direct},
{_sta, _direct},
{_eora, _direct},
{_adca, _direct},
{_ora, _direct},
{_adda, _direct},
{_cmpx, _direct},
{_jsr, _direct},
{_ldx, _direct},
{_stx, _direct},
{_suba, _indexed},
{_cmpa, _indexed},
{_sbca, _indexed},
{_subd, _indexed},
{_anda, _indexed},
{_bita, _indexed},
{_lda, _indexed},
{_sta, _indexed},
{_eora, _indexed},
{_adca, _indexed},
{_ora, _indexed},
{_adda, _indexed},
{_cmpx, _indexed},
{_jsr, _indexed},
{_ldx, _indexed},
{_stx, _indexed},
{_suba, _extended},
{_cmpa, _extended},
{_sbca, _extended},
{_subd, _extended},
{_anda, _extended},
{_bita, _extended},
{_lda, _extended},
{_sta, _extended},
{_eora, _extended},
{_adca, _extended},
{_ora, _extended},
{_adda, _extended},
{_cmpx, _extended},
{_jsr, _extended},
{_ldx, _extended},
{_stx, _extended},
{_subb, _imm_byte},
{_cmpb, _imm_byte},
{_sbcb, _imm_byte},
{_addd, _imm_word},
{_andb, _imm_byte},
{_bitb, _imm_byte},
{_ldb, _imm_byte},
{_undoc, _illegal},
{_eorb, _imm_byte},
{_adcb, _imm_byte},
{_orb, _imm_byte},
{_addb, _imm_byte},
{_ldd, _imm_word},
{_undoc, _illegal},
{_ldu, _imm_word},
{_undoc, _illegal},
{_subb, _direct},
{_cmpb, _direct},
{_sbcb, _direct},
{_addd, _direct},
{_andb, _direct},
{_bitb, _direct},
{_ldb, _direct},
{_stb, _direct},
{_eorb, _direct},
{_adcb, _direct},
{_orb, _direct},
{_addb, _direct},
{_ldd, _direct},
{_std, _direct},
{_ldu, _direct},
{_stu, _direct},
{_subb, _indexed},
{_cmpb, _indexed},
{_sbcb, _indexed},
{_addd, _indexed},
{_andb, _indexed},
{_bitb, _indexed},
{_ldb, _indexed},
{_stb, _indexed},
{_eorb, _indexed},
{_adcb, _indexed},
{_orb, _indexed},
{_addb, _indexed},
{_ldd, _indexed},
{_std, _indexed},
{_ldu, _indexed},
{_stu, _indexed},
{_subb, _extended},
{_cmpb, _extended},
{_sbcb, _extended},
{_addd, _extended},
{_andb, _extended},
{_bitb, _extended},
{_ldb, _extended},
{_stb, _extended},
{_eorb, _extended},
{_adcb, _extended},
{_orb, _extended},
{_addb, _extended},
{_ldd, _extended},
{_std, _extended},
{_ldu, _extended},
{_stu, _extended}
};
opcode_t codes10[256] = {
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_lbrn, _rel_word},
{_lbhi, _rel_word},
{_lbls, _rel_word},
{_lbcc, _rel_word},
{_lbcs, _rel_word},
{_lbne, _rel_word},
{_lbeq, _rel_word},
{_lbvc, _rel_word},
{_lbvs, _rel_word},
{_lbpl, _rel_word},
{_lbmi, _rel_word},
{_lbge, _rel_word},
{_lblt, _rel_word},
{_lbgt, _rel_word},
{_lble, _rel_word},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_swi2, _implied},
{_undoc, _illegal}, /* 10 40 */
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpd, _imm_word},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpy, _imm_word},
{_undoc, _illegal},
{_ldy, _imm_word},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpd, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpy, _direct},
{_undoc, _illegal},
{_ldy, _direct},
{_sty, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpd, _indexed},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpy, _indexed},
{_undoc, _illegal},
{_ldy, _indexed},
{_sty, _indexed},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpd, _extended},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpy, _extended},
{_undoc, _illegal},
{_ldy, _extended},
{_sty, _extended},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_lds, _imm_word},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_lds, _direct},
{_sts, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_lds, _indexed},
{_sts, _indexed},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_lds, _extended},
{_sts, _extended}
};
opcode_t codes11[256] = {
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_swi3, _implied},
{_undoc, _illegal}, /* 11 40 */
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpu, _imm_word},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmps, _imm_word},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpu, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmps, _direct},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpu, _indexed},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmps, _indexed},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmpu, _extended},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_cmps, _extended},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal},
{_undoc, _illegal}
};
char *reg[] = {
"D", "X", "Y", "U", "S", "PC", "??", "??",
"A", "B", "CC", "DP", "??", "??", "??", "??"
};
char index_reg[] = { 'X', 'Y', 'U', 'S' };
char *off4[] = {
"0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", "10", "11", "12", "13", "14", "15",
"-16", "-15", "-14", "-13", "-12", "-11", "-10", "-9",
"-8", "-7", "-6", "-5", "-4", "-3", "-2", "-1"
};
/* Disassemble the current instruction. Returns the number of bytes that
compose it. */
int
dasm (char *buf, absolute_address_t opc)
{
UINT8 op, am;
char *op_str;
absolute_address_t pc = opc;
char R;
int fetch1; /* the first (MSB) fetched byte, used in macro RDWORD */
op = fetch8 ();
if (op == 0x10)
{
op = fetch8 ();
am = codes10[op].mode;
op = codes10[op].code;
}
else if (op == 0x11)
{
op = fetch8 ();
am = codes11[op].mode;
op = codes11[op].code;
}
else
{
am = codes[op].mode;
op = codes[op].code;
}
op_str = (char *) mne[op];
buf += sprintf (buf, "%-6.6s", op_str);
switch (am)
{
case _illegal:
sprintf (buf, "???");
break;
case _implied:
break;
case _imm_byte:
sprintf (buf, "#$%02X", fetch8 ());
break;
case _imm_word:
sprintf (buf, "#$%04X", fetch16 ());
break;
case _direct:
sprintf (buf, "<%s", monitor_addr_name (fetch8 ()));
break;
case _extended:
sprintf (buf, "%s", monitor_addr_name (fetch16 ()));
break;
case _indexed:
op = fetch8 ();
R = index_reg[(op >> 5) & 0x3];
if ((op & 0x80) == 0)
{
sprintf (buf, "%s,%c", off4[op & 0x1f], R);
break;
}
switch (op & 0x1f)
{
case 0x00:
sprintf (buf, ",%c+", R);
break;
case 0x01:
sprintf (buf, ",%c++", R);
break;
case 0x02:
sprintf (buf, ",-%c", R);
break;
case 0x03:
sprintf (buf, ",--%c", R);
break;
case 0x04:
sprintf (buf, ",%c", R);
break;
case 0x05:
sprintf (buf, "B,%c", R);
break;
case 0x06:
sprintf (buf, "A,%c", R);
break;
case 0x08:
sprintf (buf, "$%02X,%c", fetch8 (), R);
break;
case 0x09:
sprintf (buf, "$%04X,%c", fetch16 (), R);
break;
case 0x0B:
sprintf (buf, "D,%c", R);
break;
case 0x0C:
sprintf (buf, "$%02X,PC", fetch8 ());
break;
case 0x0D:
sprintf (buf, "$%04X,PC", fetch16 ());
break;
case 0x11:
sprintf (buf, "[,%c++]", R);
break;
case 0x13:
sprintf (buf, "[,--%c]", R);
break;
case 0x14: