Commit of version 1.4
This commit is contained in:
Tennessee Carmel-Veilleux
parent
a77865e704
commit
33a91e2427
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/**************************************************************/
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/* DCC6502.c -> Main module of: */
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/* Disassembler and Cycle Counter for the 6502 microprocessor */
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/* */
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/* (C) 1998-2001 Tennessee Carmel-Veilleux(veilleux@ameth.org)*/
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/* This code is offered as FREEware. You cannot modify nor */
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/* distribute modified versions of this software without */
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/* prior written consent of the author(s). The author shall */
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/* NOT be responsible for ANY damage purely physical, */
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/* emotional, material and magical to either you or anyone */
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/* in the universe. */
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/**************************************************************/
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#include <stdio.h>
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#include <string.h>
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#define VERSION_INFO "v1.4"
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#define NUMBER_OPCODES 151
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/* The 6502's 13 addressing modes */
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#define IMMED 0 /* Immediate */
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#define ABSOL 1 /* Absolute */
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#define ZEROP 2 /* Zero Page */
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#define IMPLI 3 /* Implied */
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#define INDIA 4 /* Indirect Absolute */
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#define ABSIX 5 /* Absolute indexed with X */
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#define ABSIY 6 /* Absolute indexed with Y */
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#define ZEPIX 7 /* Zero page indexed with X */
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#define ZEPIY 8 /* Zero page indexed with Y */
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#define INDIN 9 /* Indexed indirect (with x) */
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#define ININD 10 /* Indirect indexed (with y) */
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#define RELAT 11 /* Relative */
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#define ACCUM 12 /* Accumulator */
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#define LSB_FIRST
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typedef struct OPcode {
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unsigned char number; /* Number of the opcode */
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unsigned char name; /* Index in the name table */
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unsigned char addressing; /* Addressing mode */
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unsigned char cycles; /* Number of cycles */
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unsigned char cross_page; /* 1 if cross-page boundaries affect cycles */
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} OPcode;
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typedef union
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{
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#ifdef LSB_FIRST
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struct { unsigned char l,h; } B;
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#else
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struct { byte h,l; } B;
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#endif
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unsigned short W;
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} word;
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char name_table[56][4]={
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"ADC","AND","ASL","BCC","BCS","BEQ","BIT","BMI","BNE","BPL",
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"BRK","BVC","BVS","CLC","CLD","CLI","CLV","CMP","CPX","CPY",
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"DEC","DEX","DEY","EOR","INC","INX","INY","JMP","JSR","LDA",
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"LDX","LDY","LSR","NOP","ORA","PHA","PHP","PLA","PLP","ROL",
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"ROR","RTI","RTS","SBC","SEC","SED","SEI","STA","STX","STY",
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"TAX","TAY","TSX","TXA","TXS","TYA"};
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/* Opcode table */
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OPcode opcode_table[NUMBER_OPCODES] = {
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{0x69,0,IMMED,2,1}, /* ADC */
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{0x65,0,ZEROP,3,1},
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{0x75,0,ZEPIX,4,1},
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{0x6D,0,ABSOL,4,1},
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{0x7D,0,ABSIX,4,1},
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{0x79,0,ABSIY,4,1},
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{0x61,0,INDIN,6,1},
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{0x71,0,ININD,5,1},
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{0x29,1,IMMED,2,1}, /* AND */
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{0x25,1,ZEROP,3,1},
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{0x35,1,ZEPIX,4,1},
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{0x2D,1,ABSOL,4,1},
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{0x3D,1,ABSIX,4,1},
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{0x39,1,ABSIY,4,1},
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{0x21,1,INDIN,6,1},
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{0x31,1,ININD,5,1},
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{0x0A,2,ACCUM,2,0}, /* ASL */
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{0x06,2,ZEROP,5,0},
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{0x16,2,ZEPIX,6,0},
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{0x0E,2,ABSOL,6,0},
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{0x1E,2,ABSIX,6,0},
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{0x90,3,RELAT,4,1}, /* BCC */
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{0xB0,4,RELAT,4,1}, /* BCS */
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{0xF0,5,RELAT,4,1}, /* BEQ */
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{0x24,6,ZEROP,3,0}, /* BIT */
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{0x2C,6,ABSOL,4,0},
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{0x30,7,RELAT,4,1}, /* BMI */
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{0xD0,8,RELAT,4,1}, /* BNE */
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{0x10,9,RELAT,4,1}, /* BPL */
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{0x00,10,IMPLI,7,0}, /* BRK */
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{0x50,11,RELAT,4,1}, /* BVC */
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{0x70,12,RELAT,4,1}, /* BVS */
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{0x18,13,IMPLI,2,0}, /* CLC */
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{0xD8,14,IMPLI,2,0}, /* CLD */
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{0x58,15,IMPLI,2,0}, /* CLI */
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{0xB8,16,IMPLI,2,0}, /* CLV */
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{0xC9,17,IMMED,2,0}, /* CMP */
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{0xC5,17,ZEROP,3,0},
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{0xD5,17,ZEPIX,4,0},
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{0xCD,17,ABSOL,4,0},
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{0xDD,17,ABSIX,4,0},
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{0xD9,17,ABSIY,4,0},
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{0xC1,17,INDIN,6,0},
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{0xD1,17,ININD,5,0},
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{0xE0,18,IMMED,2,0}, /* CPX */
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{0xE4,18,ZEROP,3,0},
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{0xEC,18,ABSOL,4,0},
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{0xC0,19,IMMED,2,0}, /* CPY */
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{0xC4,19,ZEROP,3,0},
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{0xCC,19,ABSOL,4,0},
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{0xC6,20,ZEROP,5,0}, /* DEC */
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{0xD6,20,ZEPIX,6,0},
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{0xCE,20,ABSOL,6,0},
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{0xDE,20,ABSIX,6,0},
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{0xCA,21,IMPLI,2,0}, /* DEX */
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{0x88,22,IMPLI,2,0}, /* DEY */
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{0x49,23,IMMED,2,1}, /* EOR */
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{0x45,23,ZEROP,3,1},
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{0x55,23,ZEPIX,4,1},
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{0x4D,23,ABSOL,4,1},
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{0x5D,23,ABSIX,4,1},
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{0x59,23,ABSIY,4,1},
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{0x41,23,INDIN,6,1},
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{0x51,23,ININD,5,1},
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{0xE6,24,ZEROP,5,0}, /* INC */
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{0xF6,24,ZEPIX,6,0},
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{0xEE,24,ABSOL,6,0},
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{0xFE,24,ABSIX,6,0},
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{0xE8,25,IMPLI,2,0}, /* INX */
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{0xC8,26,IMPLI,2,0}, /* INY */
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{0x4C,27,ABSOL,3,0}, /* JMP */
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{0x6C,27,INDIA,5,0},
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{0x20,28,ABSOL,6,0}, /* JSR */
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{0xA9,29,IMMED,2,1}, /* LDA */
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{0xA5,29,ZEROP,3,1},
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{0xB5,29,ZEPIX,4,1},
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{0xAD,29,ABSOL,4,1},
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{0xBD,29,ABSIX,4,1},
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{0xB9,29,ABSIY,4,1},
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{0xA1,29,INDIN,6,1},
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{0xB1,29,ININD,5,1},
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{0xA2,30,IMMED,2,1}, /* LDX */
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{0xA6,30,ZEROP,3,1},
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{0xB6,30,ZEPIY,4,1},
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{0xAE,30,ABSOL,4,1},
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{0xBE,30,ABSIY,4,1},
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{0xA0,31,IMMED,2,1}, /* LDY */
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{0xA4,31,ZEROP,3,1},
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{0xB4,31,ZEPIX,4,1},
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{0xAC,31,ABSOL,4,1},
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{0xBC,31,ABSIX,4,1},
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{0x4A,32,ACCUM,2,0}, /* LSR */
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{0x46,32,ZEROP,5,0},
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{0x56,32,ZEPIX,6,0},
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{0x4E,32,ABSOL,6,0},
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{0x5E,32,ABSIX,6,0},
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{0xEA,33,IMPLI,2,0}, /* NOP */
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{0x09,34,IMMED,2,0}, /* ORA */
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{0x05,34,ZEROP,3,0},
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{0x15,34,ZEPIX,4,0},
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{0x0D,34,ABSOL,4,0},
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{0x1D,34,ABSIX,4,0},
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{0x19,34,ABSIY,4,0},
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{0x01,34,INDIN,6,0},
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{0x11,34,ININD,5,0},
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{0x48,35,IMPLI,3,0}, /* PHA */
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{0x08,36,IMPLI,3,0}, /* PHP */
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{0x68,37,IMPLI,4,0}, /* PLA */
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{0x28,38,IMPLI,4,0}, /* PLP */
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{0x2A,39,ACCUM,2,0}, /* ROL */
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{0x26,39,ZEROP,5,0},
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{0x36,39,ZEPIX,6,0},
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{0x2E,39,ABSOL,6,0},
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{0x3E,39,ABSIX,6,0},
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{0x6A,40,ACCUM,2,0}, /* ROR */
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{0x66,40,ZEROP,5,0},
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{0x76,40,ZEPIX,6,0},
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{0x6E,40,ABSOL,6,0},
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{0x7E,40,ABSIX,6,0},
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{0x40,41,IMPLI,6,0}, /* RTI */
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{0x60,42,IMPLI,6,0}, /* RTS */
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{0xE9,43,IMMED,2,1}, /* SBC */
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{0xE5,43,ZEROP,3,1},
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{0xF5,43,ZEPIX,4,1},
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{0xED,43,ABSOL,4,1},
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{0xFD,43,ABSIX,4,1},
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{0xF9,43,ABSIY,4,1},
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{0xE1,43,INDIN,6,1},
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{0xF1,43,ININD,5,1},
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{0x38,44,IMPLI,2,0}, /* SEC */
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{0xF8,45,IMPLI,2,0}, /* SED */
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{0x78,46,IMPLI,2,0}, /* SEI */
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{0x85,47,ZEROP,3,0}, /* STA */
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{0x95,47,ZEPIX,4,0},
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{0x8D,47,ABSOL,4,0},
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{0x9D,47,ABSIX,4,0},
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{0x99,47,ABSIY,4,0},
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{0x81,47,INDIN,6,0},
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{0x91,47,ININD,5,0},
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{0x86,48,ZEROP,3,0}, /* STX */
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{0x96,48,ZEPIY,4,0},
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{0x8E,48,ABSOL,4,0},
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{0x84,49,ZEROP,3,0}, /* STY */
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{0x94,49,ZEPIX,4,0},
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{0x8C,49,ABSOL,4,0},
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{0xAA,50,IMPLI,2,0}, /* TAX */
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{0xA8,51,IMPLI,2,0}, /* TAY */
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{0xBA,52,IMPLI,2,0}, /* TSX */
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{0x8A,53,IMPLI,2,0}, /* TXA */
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{0x9A,54,IMPLI,2,0}, /* TXS */
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{0x98,55,IMPLI,2,0} /* TYA */
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};
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unsigned short org; /* Origin of addresses */
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char hex_output = 0; /* 1 if hex output is desired at beginning of line */
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char cycle_counting = 0; /* 1 if we want cycle counting */
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char nes_mode = 0; /* 1 if NES commenting and warnings are enabled */
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FILE *f; /* Input file */
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unsigned char buffer[0xffff]; /* Memory buffer */
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unsigned short PC=0; /* Program counter */
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unsigned short max=0xffff; /* Maximum number of bytes to disassemble */
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char line[512];
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/* This function emits a comment header with information about the file
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being disassembled */
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void emit_header(char *filename, int fsize, unsigned short org) {
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fprintf(stdout,"; Source generated by DCC6502 version %s\n",VERSION_INFO);
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fprintf(stdout,"; For more info about DCC6502, e-mail veilleux@ameth.org\n;\n");
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fprintf(stdout,"; FILENAME: %s, File Size: %d, ORG: $%04X\n",filename,fsize,org);
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if (hex_output) fprintf(stdout,"; -> Hex output enabled\n");
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if (cycle_counting) fprintf(stdout,"; -> Cycle counting enabled\n");
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if (nes_mode) fprintf(stdout,"; -> NES mode enabled\n");
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fprintf(stdout,";---------------------------------------------------------------------------\n");
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}
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/* This function appends cycle counting to the comment block */
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void append_cycle(char *input, unsigned char entry, unsigned short arg, unsigned short cur_PC) {
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char tmpstr[256];
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int cycles = 0;
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cycles = opcode_table[entry].cycles;
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sprintf(tmpstr," Cycles: %d ",cycles);
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if (opcode_table[entry].cross_page) strcat(tmpstr,"*!* ");
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strcat(input,tmpstr);
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}
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void add_nes_str(char *instr, char *instr2) {
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strcat(instr," [NES] ");
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strcat(instr,instr2);
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}
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/* This function put NES-specific info in the comment block */
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void append_nes(char *input, unsigned short arg) {
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switch(arg) {
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case 0x2000: add_nes_str(input,"PPU setup #1"); break;
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case 0x2001: add_nes_str(input,"PPU setup #2"); break;
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case 0x2002: add_nes_str(input,"PPU status"); break;
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case 0x2003: add_nes_str(input,"SPR-RAM address select"); break;
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case 0x2004: add_nes_str(input,"SPR-RAM data"); break;
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case 0x2005: add_nes_str(input,"PPU scroll"); break;
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case 0x2006: add_nes_str(input,"VRAM address select"); break;
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case 0x2007: add_nes_str(input,"VRAM data"); break;
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case 0x4000: add_nes_str(input,"Audio -> Square 1"); break;
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case 0x4001: add_nes_str(input,"Audio -> Square 1"); break;
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case 0x4002: add_nes_str(input,"Audio -> Square 1"); break;
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case 0x4003: add_nes_str(input,"Audio -> Square 1"); break;
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case 0x4004: add_nes_str(input,"Audio -> Square 2"); break;
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case 0x4005: add_nes_str(input,"Audio -> Square 2"); break;
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case 0x4006: add_nes_str(input,"Audio -> Square 2"); break;
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case 0x4007: add_nes_str(input,"Audio -> Square 2"); break;
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case 0x4008: add_nes_str(input,"Audio -> Triangle"); break;
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case 0x4009: add_nes_str(input,"Audio -> Triangle"); break;
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case 0x400a: add_nes_str(input,"Audio -> Triangle"); break;
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case 0x400b: add_nes_str(input,"Audio -> Triangle"); break;
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case 0x400c: add_nes_str(input,"Audio -> Noise control reg"); break;
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case 0x400e: add_nes_str(input,"Audio -> Noise Frequency reg #1"); break;
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case 0x400f: add_nes_str(input,"Audio -> Noise Frequency reg #2"); break;
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case 0x4010: add_nes_str(input,"Audio -> DPCM control"); break;
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case 0x4011: add_nes_str(input,"Audio -> DPCM D/A data"); break;
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case 0x4012: add_nes_str(input,"Audio -> DPCM address"); break;
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case 0x4013: add_nes_str(input,"Audio -> DPCM data length"); break;
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case 0x4014: add_nes_str(input,"Sprite DMA trigger"); break;
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case 0x4015: add_nes_str(input,"IRQ status / Sound enable"); break;
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case 0x4016: add_nes_str(input,"Joypad & I/O port for port #1"); break;
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case 0x4017: add_nes_str(input,"Joypad & I/O port for port #2"); break;
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}
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}
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/* This function disassembles the opcode at the PC and outputs it in *output */
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void disassemble(char *output) {
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unsigned char tmp_byte1, tmp_byte2, opcode;
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char argument_signed;
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word tmp_word;
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char tmpstr[256],tmpstr2[256],tmpstr3[256];
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int i,j,entry,found = 0;
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opcode = buffer[PC];
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for (i = 0; i < NUMBER_OPCODES; i++) {
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if (opcode == opcode_table[i].number) {
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found = 1; /* Found the opcode */
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entry = i; /* Note the entry number in the table */
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}
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}
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if (!found) {
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if (hex_output) {
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sprintf(tmpstr,"$%04X> %02X:\t.byte $%02x\t\t; INVALID OPCODE !!!\n",org+PC,opcode,opcode);
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strncpy(output, tmpstr, 254);
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} else {
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sprintf(tmpstr,"$%04X\t.byte $%02x\t; INVALID OPCODE !!!\n",org+PC,opcode);
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strncpy(output, tmpstr, 254);
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}
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} else {
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switch (opcode_table[entry].addressing) {
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case IMMED:
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PC++;
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tmp_byte1 = buffer[PC]; /* Get immediate value */
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if (hex_output)
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sprintf(tmpstr,"$%04X> %02X %02X:\t%s #$%02x\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],tmp_byte1);
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else
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sprintf(tmpstr,"$%04X\t%s #$%02x\t;",org+PC-1,name_table[opcode_table[entry].name],tmp_byte1);
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/* Add cycle count if necessary */
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if (cycle_counting) append_cycle(tmpstr,entry,org+PC-1,org+PC-1);
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strncpy(output,tmpstr,254);
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break;
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case ABSOL:
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PC++;
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tmp_word.B.l = buffer[PC]; /* Get low byte of address */
|
||||
PC++;
|
||||
tmp_word.B.h = buffer[PC]; /* Get high byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X%02X:\t%s $%02X%02X\t;",org+PC-2,opcode,tmp_word.B.l,tmp_word.B.h,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%02X%02X\t;",org+PC-2,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,tmp_word.W,org+PC-2);
|
||||
|
||||
/* Add NES port info if necessary */
|
||||
if (nes_mode) append_nes(tmpstr,tmp_word.W);
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ZEROP:
|
||||
PC++;
|
||||
tmp_byte1 = buffer[PC]; /* Get low byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X:\t%s $%02X\t\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%02X\t\t;",org+PC-1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC-1,org+PC-1);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case IMPLI:
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X:\t%s\t\t;",org+PC,opcode,name_table[opcode_table[entry].name]);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s\t\t;",org+PC,name_table[opcode_table[entry].name]);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC,org+PC);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case INDIA:
|
||||
PC++;
|
||||
tmp_word.B.l = buffer[PC]; /* Get low byte of address */
|
||||
PC++;
|
||||
tmp_word.B.h = buffer[PC]; /* Get high byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X%02X:\t%s ($%02X%02X)\t;",org+PC-2,opcode,tmp_word.B.l,tmp_word.B.h,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s ($%02X%02X)\t;",org+PC-2,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,tmp_word.W,org+PC-2);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ABSIX:
|
||||
PC++;
|
||||
tmp_word.B.l = buffer[PC]; /* Get low byte of address */
|
||||
PC++;
|
||||
tmp_word.B.h = buffer[PC]; /* Get high byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X%02X:\t%s $%02X%02X,X\t;",org+PC-2,opcode,tmp_word.B.l,tmp_word.B.h,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%02X%02X,X\t;",org+PC-2,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,tmp_word.W,org+PC-2);
|
||||
|
||||
/* Add NES port info if necessary */
|
||||
if (nes_mode) append_nes(tmpstr,tmp_word.W);
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ABSIY:
|
||||
PC++;
|
||||
tmp_word.B.l = buffer[PC]; /* Get low byte of address */
|
||||
PC++;
|
||||
tmp_word.B.h = buffer[PC]; /* Get high byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X%02X:\t%s $%02X%02X,Y\t;",org+PC-2,opcode,tmp_word.B.l,tmp_word.B.h,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%02X%02X,Y\t;",org+PC-2,name_table[opcode_table[entry].name],tmp_word.B.h,tmp_word.B.l);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,tmp_word.W,org+PC-2);
|
||||
|
||||
/* Add NES port info if necessary */
|
||||
if (nes_mode) append_nes(tmpstr,tmp_word.W);
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ZEPIX:
|
||||
PC++;
|
||||
tmp_byte1 = buffer[PC]; /* Get low byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X:\t%s $%02X,X\t\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%02X,X\t;",org+PC-1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC-1,org+PC-1);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ZEPIY:
|
||||
PC++;
|
||||
tmp_byte1 = buffer[PC]; /* Get low byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X:\t%s $%02X,Y\t\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%02X,Y\t;",org+PC-1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC-1,org+PC-1);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case INDIN:
|
||||
PC++;
|
||||
tmp_byte1 = buffer[PC]; /* Get low byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X:\t%s ($%02X,X)\t\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s ($%02X,X)\t;",org+PC-1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC-1,org+PC-1);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ININD:
|
||||
PC++;
|
||||
tmp_byte1 = buffer[PC]; /* Get low byte of address */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X:\t%s ($%02X),Y\t\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s ($%02X),Y\t;",org+PC-1,name_table[opcode_table[entry].name],tmp_byte1);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC-1,org+PC-1);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case RELAT:
|
||||
PC++;
|
||||
tmp_byte1 = buffer[PC]; /* Get relative modifier */
|
||||
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X %02X:\t%s $%04X\t\t;",org+PC-1,opcode,tmp_byte1,name_table[opcode_table[entry].name],(org+PC)+(signed char)(tmp_byte1)+1);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s $%04X\t;",org+PC-1,name_table[opcode_table[entry].name],(org+PC)+(signed char)(tmp_byte1)+1);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC,org+PC);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
case ACCUM:
|
||||
if (hex_output)
|
||||
sprintf(tmpstr,"$%04X> %02X:\t%s A\t\t;",org+PC,opcode,name_table[opcode_table[entry].name]);
|
||||
else
|
||||
sprintf(tmpstr,"$%04X\t%s A\t\t;",org+PC,name_table[opcode_table[entry].name]);
|
||||
|
||||
/* Add cycle count if necessary */
|
||||
if (cycle_counting) append_cycle(tmpstr,entry,org+PC,org+PC);
|
||||
|
||||
strncpy(output,tmpstr,254);
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void version(void) {
|
||||
fprintf(stderr,"DCC6502 %s (C)1998-2001 Tennessee Carmel-Veilleux\n",VERSION_INFO);
|
||||
fprintf(stderr,"This is free software. To see the LICENSE, use the -v parameter\n");
|
||||
}
|
||||
|
||||
void usage_helper(char *str) {
|
||||
fprintf(stderr,"\t%s\n",str);
|
||||
}
|
||||
|
||||
void usage(void) {
|
||||
usage_helper("-? -> Show this help message");
|
||||
usage_helper("-oXXXX -> Set the origin (ORG) [dfl: $8000]");
|
||||
usage_helper("-h -> Get hex info about disassembly");
|
||||
usage_helper("-mXXXX -> Only disassemble the first XXXX bytes");
|
||||
usage_helper("-n -> Enable NES mode");
|
||||
usage_helper("-v -> Get only version information");
|
||||
usage_helper("-c -> Get cycle counting info");
|
||||
fprintf(stderr,"\n");
|
||||
}
|
||||
|
||||
void license(void) {
|
||||
fprintf(stderr,"(C) 1998-2001 Tennessee Carmel-Veilleux(veilleux@ameth.org)\n");
|
||||
fprintf(stderr,"This code is offered as FREEware. You cannot modify nor\n");
|
||||
fprintf(stderr,"distribute modified versions of this software without\n");
|
||||
fprintf(stderr,"prior written consent of the author(s). The author shall\n");
|
||||
fprintf(stderr,"NOT be responsible for ANY damage purely physical,\n");
|
||||
fprintf(stderr,"emotional, material and magical to either you or anyone\n");
|
||||
fprintf(stderr,"in the universe.\n");
|
||||
}
|
||||
|
||||
unsigned short hex2int (char *str, unsigned short dfl) {
|
||||
char HEX_digits[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
|
||||
int i,j;
|
||||
char c,k,shift;
|
||||
unsigned short tmp=0;
|
||||
|
||||
shift = 0;
|
||||
for (i = 5; i >= 2; i--) {
|
||||
if (!isxdigit(str[i])) {
|
||||
tmp = dfl;
|
||||
break;
|
||||
}
|
||||
c = toupper(str[i]);
|
||||
for (j = 0; j < 16; j++) {
|
||||
if (c == HEX_digits[j]) k = j;
|
||||
}
|
||||
tmp |= ((k&0xf) << shift);
|
||||
shift += 4;
|
||||
}
|
||||
return tmp;
|
||||
}
|
||||
|
||||
void set_org(char *str) {
|
||||
if (strlen(str) < 6) {
|
||||
fprintf(stderr,"WARNING -> %s is not a valid ORG switch, deafaulting to $8000\n");
|
||||
org = 0x8000;
|
||||
return;
|
||||
}
|
||||
|
||||
org = hex2int(str,0x8000);
|
||||
}
|
||||
|
||||
void set_max(char *str) {
|
||||
if (strlen(str) != 6) {
|
||||
fprintf(stderr,"WARNING -> %s is not a valid MAX switch, defaulting to $%04X\n",0xffff);
|
||||
max = 0xFFFF-org;
|
||||
return;
|
||||
}
|
||||
|
||||
max = hex2int(str,0xFFFF);
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
int i=0;
|
||||
char c;
|
||||
char tmpstring[512];
|
||||
char filename[512];
|
||||
|
||||
cycle_counting = 0;
|
||||
hex_output = 0;
|
||||
org = 0x8000;
|
||||
|
||||
if (argc < 2) {
|
||||
version();
|
||||
usage();
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (argc > 2) {
|
||||
for (i = 1; i < argc - 1; i++) {
|
||||
if (argv[i][0] != '-') {
|
||||
version();
|
||||
usage();
|
||||
fprintf(stderr,"Unrecognized switch: %s\n",argv[i]);
|
||||
exit(1);
|
||||
}
|
||||
switch (argv[i][1]) {
|
||||
case '?': version(); usage(); license(); exit(0); break;
|
||||
case 'n': nes_mode = 1; break;
|
||||
case 'c': cycle_counting = 1; break;
|
||||
case 'h': hex_output = 1; break;
|
||||
case 'v': version(); license(); exit(0); break;
|
||||
case 'o': set_org(argv[i]); break;
|
||||
case 'm': set_max(argv[i]); break;
|
||||
|
||||
default: version(); usage(); fprintf(stderr,"Unrecognized switch: %s\n",argv[i]); exit(1);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
|
||||
if (argv[1][0] != '-') {
|
||||
strncpy(filename,argv[1],511);
|
||||
} else
|
||||
|
||||
switch (argv[1][1]) {
|
||||
case '?': version(); usage(); license(); exit(0); break;
|
||||
case 'v': version(); license(); exit(0); break;
|
||||
default: version(); usage(); fprintf(stderr,"Unrecognized switch: %s\n",argv[1]); exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
strncpy(filename,argv[argc-1],511);
|
||||
|
||||
f = fopen(filename,"rb");
|
||||
|
||||
if (!f) {
|
||||
version();
|
||||
fprintf(stderr,"File not found or invalid filename : %s\n",filename);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
i = 0;
|
||||
while(!feof(f) && ((i+org) < 65535)) {
|
||||
fread(&buffer[i],1,1,f);
|
||||
i++;
|
||||
}
|
||||
|
||||
fclose(f);
|
||||
|
||||
emit_header(filename,i,org);
|
||||
PC = 0;
|
||||
while(PC+org < 65535 && PC <= max) {
|
||||
disassemble(tmpstring);
|
||||
fprintf(stdout,"%s\n",tmpstring);
|
||||
PC++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue