mirror of
https://github.com/hoglet67/AtomBusMon.git
synced 2024-12-22 16:30:06 +00:00
272 lines
6.5 KiB
C
272 lines
6.5 KiB
C
#include <avr/pgmspace.h>
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#include "AtomBusMon.h"
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enum
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{
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IMP, IMPA, MARK2, BRA, IMM, ZP, ZPX, ZPY, INDX, INDY, IND, MARK3, ABS, ABSX, ABSY, IND16, IND1X
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};
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enum
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{
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I_ADC,
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I_AND,
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I_ASL,
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I_BCC,
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I_BCS,
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I_BEQ,
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I_BIT,
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I_BMI,
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I_BNE,
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I_BPL,
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I_BRA,
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I_BRK,
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I_BVC,
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I_BVS,
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I_CLC,
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I_CLD,
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I_CLI,
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I_CLV,
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I_CMP,
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I_CPX,
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I_CPY,
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I_DEC,
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I_DEX,
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I_DEY,
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I_EOR,
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I_INC,
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I_INX,
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I_INY,
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I_JMP,
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I_JSR,
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I_LDA,
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I_LDX,
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I_LDY,
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I_LSR,
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I_NOP,
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I_ORA,
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I_PHA,
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I_PHP,
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I_PHX,
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I_PHY,
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I_PLA,
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I_PLP,
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I_PLX,
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I_PLY,
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I_ROL,
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I_ROR,
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I_RTI,
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I_RTS,
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I_SBC,
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I_SEC,
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I_SED,
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I_SEI,
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I_STA,
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I_STP,
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I_STX,
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I_STY,
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I_STZ,
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I_TAX,
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I_TAY,
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I_TRB,
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I_TSB,
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I_TSX,
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I_TXA,
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I_TXS,
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I_TYA,
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I_WAI,
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I_XXX
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};
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static const char opString[] PROGMEM = "\
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ADC\
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AND\
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ASL\
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BCC\
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BCS\
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BEQ\
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BIT\
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BMI\
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BNE\
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BPL\
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BRA\
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BRK\
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BVC\
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BVS\
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CLC\
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CLD\
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CLI\
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CLV\
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CMP\
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CPX\
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CPY\
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DEC\
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DEX\
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DEY\
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EOR\
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INC\
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INX\
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INY\
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JMP\
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JSR\
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LDA\
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LDX\
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LDY\
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LSR\
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NOP\
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ORA\
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PHA\
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PHP\
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PHX\
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PHY\
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PLA\
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PLP\
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PLX\
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PLY\
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ROL\
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ROR\
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RTI\
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RTS\
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SBC\
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SEC\
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SED\
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SEI\
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STA\
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STP\
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STX\
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STY\
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STZ\
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TAX\
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TAY\
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TRB\
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TSB\
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TSX\
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TXA\
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TXS\
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TYA\
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WAI\
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---\
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";
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static const unsigned char dopname[256] PROGMEM =
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{
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/*00*/ I_BRK, I_ORA, I_XXX, I_XXX, I_TSB, I_ORA, I_ASL, I_XXX, I_PHP, I_ORA, I_ASL, I_XXX, I_TSB, I_ORA, I_ASL, I_XXX,
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/*10*/ I_BPL, I_ORA, I_ORA, I_XXX, I_TRB, I_ORA, I_ASL, I_XXX, I_CLC, I_ORA, I_INC, I_XXX, I_TRB, I_ORA, I_ASL, I_XXX,
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/*20*/ I_JSR, I_AND, I_XXX, I_XXX, I_BIT, I_AND, I_ROL, I_XXX, I_PLP, I_AND, I_ROL, I_XXX, I_BIT, I_AND, I_ROL, I_XXX,
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/*30*/ I_BMI, I_AND, I_AND, I_XXX, I_BIT, I_AND, I_ROL, I_XXX, I_SEC, I_AND, I_DEC, I_XXX, I_BIT, I_AND, I_ROL, I_XXX,
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/*40*/ I_RTI, I_EOR, I_XXX, I_XXX, I_XXX, I_EOR, I_LSR, I_XXX, I_PHA, I_EOR, I_LSR, I_XXX, I_JMP, I_EOR, I_LSR, I_XXX,
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/*50*/ I_BVC, I_EOR, I_EOR, I_XXX, I_XXX, I_EOR, I_LSR, I_XXX, I_CLI, I_EOR, I_PHY, I_XXX, I_XXX, I_EOR, I_LSR, I_XXX,
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/*60*/ I_RTS, I_ADC, I_XXX, I_XXX, I_STZ, I_ADC, I_ROR, I_XXX, I_PLA, I_ADC, I_ROR, I_XXX, I_JMP, I_ADC, I_ROR, I_XXX,
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/*70*/ I_BVS, I_ADC, I_ADC, I_XXX, I_STZ, I_ADC, I_ROR, I_XXX, I_SEI, I_ADC, I_PLY, I_XXX, I_JMP, I_ADC, I_ROR, I_XXX,
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/*80*/ I_BRA, I_STA, I_XXX, I_XXX, I_STY, I_STA, I_STX, I_XXX, I_DEY, I_BIT, I_TXA, I_XXX, I_STY, I_STA, I_STX, I_XXX,
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/*90*/ I_BCC, I_STA, I_STA, I_XXX, I_STY, I_STA, I_STX, I_XXX, I_TYA, I_STA, I_TXS, I_XXX, I_STZ, I_STA, I_STZ, I_XXX,
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/*A0*/ I_LDY, I_LDA, I_LDX, I_XXX, I_LDY, I_LDA, I_LDX, I_XXX, I_TAY, I_LDA, I_TAX, I_XXX, I_LDY, I_LDA, I_LDX, I_XXX,
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/*B0*/ I_BCS, I_LDA, I_LDA, I_XXX, I_LDY, I_LDA, I_LDX, I_XXX, I_CLV, I_LDA, I_TSX, I_XXX, I_LDY, I_LDA, I_LDX, I_XXX,
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/*C0*/ I_CPY, I_CMP, I_XXX, I_XXX, I_CPY, I_CMP, I_DEC, I_XXX, I_INY, I_CMP, I_DEX, I_WAI, I_CPY, I_CMP, I_DEC, I_XXX,
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/*D0*/ I_BNE, I_CMP, I_CMP, I_XXX, I_XXX, I_CMP, I_DEC, I_XXX, I_CLD, I_CMP, I_PHX, I_STP, I_XXX, I_CMP, I_DEC, I_XXX,
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/*E0*/ I_CPX, I_SBC, I_XXX, I_XXX, I_CPX, I_SBC, I_INC, I_XXX, I_INX, I_SBC, I_NOP, I_XXX, I_CPX, I_SBC, I_INC, I_XXX,
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/*F0*/ I_BEQ, I_SBC, I_SBC, I_XXX, I_XXX, I_SBC, I_INC, I_XXX, I_SED, I_SBC, I_PLX, I_XXX, I_XXX, I_SBC, I_INC, I_XXX
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};
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static const unsigned char dopaddr[256] PROGMEM =
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{
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/*00*/ IMP, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, ABS, ABS, ABS, IMP,
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/*10*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMPA, IMP, ABS, ABSX, ABSX, IMP,
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/*20*/ ABS, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, ABS, ABS, ABS, IMP,
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/*30*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPX, IMP, IMP, ABSY, IMPA, IMP, ABSX, ABSX, ABSX, IMP,
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/*40*/ IMP, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, ABS, ABS, ABS, IMP,
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/*50*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
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/*60*/ IMP, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMPA, IMP, IND16, ABS, ABS, IMP,
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/*70*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, IND1X, ABSX, ABSX, IMP,
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/*80*/ BRA, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
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/*90*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPY, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
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/*A0*/ IMM, INDX, IMM, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
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/*B0*/ BRA, INDY, IND, IMP, ZPX, ZPX, ZPY, IMP, IMP, ABSY, IMP, IMP, ABSX, ABSX, ABSY, IMP,
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/*C0*/ IMM, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
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/*D0*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP,
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/*E0*/ IMM, INDX, IMP, IMP, ZP, ZP, ZP, IMP, IMP, IMM, IMP, IMP, ABS, ABS, ABS, IMP,
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/*F0*/ BRA, INDY, IND, IMP, ZP, ZPX, ZPX, IMP, IMP, ABSY, IMP, IMP, ABS, ABSX, ABSX, IMP
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};
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unsigned int disassemble(unsigned int addr)
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{
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unsigned int temp;
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unsigned int op = readMemByteInc();
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int mode = pgm_read_byte(dopaddr + op);
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unsigned int p1 = (mode > MARK2) ? readMemByteInc() : 0;
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unsigned int p2 = (mode > MARK3) ? readMemByteInc() : 0;
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int opIndex = pgm_read_byte(dopname + op) * 3;
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log0("%04X : ", addr);
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for (temp = 0; temp < 3; temp++) {
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log0("%c", pgm_read_byte(opString + opIndex + temp));
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}
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log0(" ");
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switch (mode)
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{
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case IMP:
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log0(" ");
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break;
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case IMPA:
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log0("A ");
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break;
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case BRA:
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temp = addr + 2 + (signed char)p1;
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log0("%04X ", temp);
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addr++;
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break;
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case IMM:
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log0("#%02X ", p1);
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addr++;
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break;
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case ZP:
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log0("%02X ", p1);
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addr++;
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break;
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case ZPX:
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log0("%02X,X ", p1);
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addr++;
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break;
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case ZPY:
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log0("%02X,Y ", p1);
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addr++;
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break;
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case IND:
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log0("(%02X) ", p1);
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addr++;
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break;
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case INDX:
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log0("(%02X,X) ", p1);
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addr++;
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break;
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case INDY:
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log0("(%02X),Y ", p1);
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addr++;
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break;
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case ABS:
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log0("%02X%02X ", p2, p1);
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addr += 2;
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break;
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case ABSX:
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log0("%02X%02X,X ", p2, p1);
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addr += 2;
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break;
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case ABSY:
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log0("%02X%02X,Y ", p2, p1);
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addr += 2;
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break;
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case IND16:
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log0("(%02X%02X) ", p2, p1);
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addr += 2;
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break;
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case IND1X:
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log0("(%02X%02X,X)", p2, p1);
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addr += 2;
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break;
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}
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log0("\n");
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addr++;
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return addr;
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}
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