379 lines
10 KiB
C
379 lines
10 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include "intel_8080_emulator.h"
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#include "dis8080.h"
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enum
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{
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NOTHING,
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CONST8,
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CONST16,
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};
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struct insn
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{
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const char* name;
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int operand;
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};
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static struct insn insns[0x100] =
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{
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/* 00-07 */
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{ "nop", NOTHING },
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{ "lxi b, 0x%04x", CONST16 },
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{ "stax b", NOTHING },
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{ "inx b", NOTHING },
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{ "inr b", NOTHING },
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{ "dcr b", NOTHING },
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{ "mvi b, 0x%02x", CONST8 },
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{ "rlc", NOTHING },
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/* 08-0f */
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{ "undef", NOTHING },
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{ "dad b", NOTHING },
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{ "ldax b", NOTHING },
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{ "dcx b", NOTHING },
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{ "inr c", NOTHING },
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{ "dcr c", NOTHING },
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{ "mvi c, 0x%02x", CONST8 },
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{ "rrc", NOTHING },
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/* 10-17 */
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{ "nop", NOTHING },
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{ "lxi d, 0x%04x", CONST16 },
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{ "stax d", NOTHING },
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{ "inx d", NOTHING },
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{ "inr d", NOTHING },
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{ "dcr d", NOTHING },
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{ "mvi d, 0x%02x", CONST8 },
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{ "ral", NOTHING },
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/* 18-1f */
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{ "undef", NOTHING },
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{ "dad d", NOTHING },
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{ "ldax d", NOTHING },
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{ "dcx d", NOTHING },
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{ "inr e", NOTHING },
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{ "dcr e", NOTHING },
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{ "mvi e, 0x%02x", CONST8 },
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{ "rar", NOTHING },
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/* 20-27 */
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{ "nop", NOTHING },
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{ "lxi h, 0x%04x", CONST16 },
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{ "shld 0x%04x", CONST16 },
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{ "inx h", NOTHING },
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{ "inr h", NOTHING },
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{ "dcr h", NOTHING },
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{ "mvi h, 0x%02x", CONST8 },
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{ "daa", NOTHING },
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/* 28-2f */
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{ "undef", NOTHING },
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{ "dad h", NOTHING },
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{ "lhld 0x%04x", CONST16 },
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{ "dcx h", NOTHING },
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{ "inr l", NOTHING },
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{ "dcr l", NOTHING },
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{ "mvi l, 0x%02x", CONST8 },
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{ "cma", NOTHING },
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/* 30-37 */
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{ "nop", NOTHING },
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{ "lxi sp, 0x%04x", CONST16 },
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{ "sta 0x%04x", CONST16 },
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{ "inx sp", NOTHING },
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{ "inr m", NOTHING },
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{ "dcr m", NOTHING },
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{ "mvi m, 0x%02x", CONST8 },
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{ "stc", NOTHING },
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/* 38-3f */
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{ "undef", NOTHING },
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{ "dad sp", NOTHING },
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{ "lda 0x%04x", CONST16 },
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{ "dcx sp", NOTHING },
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{ "inr a", NOTHING },
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{ "dcr a", NOTHING },
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{ "mvi a, 0x%02x", CONST8 },
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{ "cmc", NOTHING },
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/* 40-47 */
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{ "mov b, b", NOTHING },
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{ "mov b, c", NOTHING },
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{ "mov b, d", NOTHING },
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{ "mov b, e", NOTHING },
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{ "mov b, h", NOTHING },
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{ "mov b, l", NOTHING },
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{ "mov b, m", NOTHING },
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{ "mov b, a", NOTHING },
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/* 47-4f */
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{ "mov c, b", NOTHING },
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{ "mov c, c", NOTHING },
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{ "mov c, d", NOTHING },
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{ "mov c, e", NOTHING },
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{ "mov c, h", NOTHING },
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{ "mov c, l", NOTHING },
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{ "mov c, m", NOTHING },
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{ "mov c, a", NOTHING },
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/* 50-57 */
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{ "mov d, b", NOTHING },
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{ "mov d, c", NOTHING },
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{ "mov d, d", NOTHING },
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{ "mov d, e", NOTHING },
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{ "mov d, h", NOTHING },
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{ "mov d, l", NOTHING },
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{ "mov d, m", NOTHING },
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{ "mov d, a", NOTHING },
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/* 57-5f */
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{ "mov e, b", NOTHING },
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{ "mov e, c", NOTHING },
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{ "mov e, d", NOTHING },
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{ "mov e, e", NOTHING },
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{ "mov e, h", NOTHING },
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{ "mov e, l", NOTHING },
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{ "mov e, m", NOTHING },
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{ "mov e, a", NOTHING },
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/* 60-67 */
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{ "mov h, b", NOTHING },
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{ "mov h, c", NOTHING },
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{ "mov h, d", NOTHING },
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{ "mov h, e", NOTHING },
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{ "mov h, h", NOTHING },
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{ "mov h, l", NOTHING },
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{ "mov h, m", NOTHING },
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{ "mov h, a", NOTHING },
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/* 67-6f */
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{ "mov l, b", NOTHING },
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{ "mov l, c", NOTHING },
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{ "mov l, d", NOTHING },
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{ "mov l, e", NOTHING },
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{ "mov l, h", NOTHING },
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{ "mov l, l", NOTHING },
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{ "mov l, m", NOTHING },
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{ "mov l, a", NOTHING },
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/* 70-77 */
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{ "mov m, b", NOTHING },
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{ "mov m, c", NOTHING },
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{ "mov m, d", NOTHING },
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{ "mov m, e", NOTHING },
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{ "mov m, h", NOTHING },
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{ "mov m, l", NOTHING },
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{ "mov m, m", NOTHING },
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{ "hlt", NOTHING },
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/* 77-7f */
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{ "mov a, b", NOTHING },
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{ "mov a, c", NOTHING },
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{ "mov a, d", NOTHING },
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{ "mov a, e", NOTHING },
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{ "mov a, h", NOTHING },
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{ "mov a, l", NOTHING },
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{ "mov a, m", NOTHING },
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{ "mov a, a", NOTHING },
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/* 80-87 */
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{ "add b", NOTHING },
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{ "add c", NOTHING },
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{ "add d", NOTHING },
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{ "add e", NOTHING },
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{ "add h", NOTHING },
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{ "add l", NOTHING },
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{ "add m", NOTHING },
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{ "add a", NOTHING },
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/* 88-8f */
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{ "adc b", NOTHING },
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{ "adc c", NOTHING },
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{ "adc d", NOTHING },
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{ "adc e", NOTHING },
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{ "adc h", NOTHING },
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{ "adc l", NOTHING },
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{ "adc m", NOTHING },
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{ "adc a", NOTHING },
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/* 90-97 */
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{ "sub b", NOTHING },
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{ "sub c", NOTHING },
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{ "sub d", NOTHING },
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{ "sub e", NOTHING },
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{ "sub h", NOTHING },
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{ "sub l", NOTHING },
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{ "sub m", NOTHING },
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{ "sub a", NOTHING },
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/* 98-9f */
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{ "sbb b", NOTHING },
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{ "sbb c", NOTHING },
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{ "sbb d", NOTHING },
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{ "sbb e", NOTHING },
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{ "sbb h", NOTHING },
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{ "sbb l", NOTHING },
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{ "sbb m", NOTHING },
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{ "sbb a", NOTHING },
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/* a0-a7 */
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{ "ana b", NOTHING },
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{ "ana c", NOTHING },
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{ "ana d", NOTHING },
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{ "ana e", NOTHING },
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{ "ana h", NOTHING },
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{ "ana l", NOTHING },
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{ "ana m", NOTHING },
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{ "ana a", NOTHING },
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/* a8-af */
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{ "xra b", NOTHING },
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{ "xra c", NOTHING },
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{ "xra d", NOTHING },
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{ "xra e", NOTHING },
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{ "xra h", NOTHING },
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{ "xra l", NOTHING },
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{ "xra m", NOTHING },
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{ "xra a", NOTHING },
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/* b0-b7 */
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{ "ora b", NOTHING },
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{ "ora c", NOTHING },
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{ "ora d", NOTHING },
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{ "ora e", NOTHING },
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{ "ora h", NOTHING },
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{ "ora l", NOTHING },
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{ "ora m", NOTHING },
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{ "ora a", NOTHING },
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/* b8-bf */
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{ "cmp b", NOTHING },
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{ "cmp c", NOTHING },
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{ "cmp d", NOTHING },
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{ "cmp e", NOTHING },
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{ "cmp h", NOTHING },
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{ "cmp l", NOTHING },
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{ "cmp m", NOTHING },
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{ "cmp a", NOTHING },
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/* c0-c7 */
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{ "rnz", NOTHING },
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{ "pop b", NOTHING },
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{ "jnz 0x%04x", CONST16 },
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{ "jmp 0x%04x", CONST16 },
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{ "cnz 0x%04x", CONST16 },
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{ "push b", NOTHING },
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{ "adi 0x%02x", CONST8 },
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{ "rst 0", NOTHING },
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/* c8-cf */
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{ "rz", NOTHING },
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{ "ret", NOTHING },
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{ "jz 0x%04x", CONST16 },
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{ "*jmp 0x%04x", CONST16 },
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{ "cz 0x%04x", CONST16 },
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{ "call 0x%04x", CONST16 },
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{ "aci 0x%02x", CONST8 },
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{ "rst 1", NOTHING },
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/* d0-d7 */
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{ "rnc", NOTHING },
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{ "pop d", NOTHING },
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{ "jnc 0x%04x", CONST16 },
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{ "out 0x%02x", CONST8 },
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{ "cnc 0x%04x", CONST16 },
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{ "push d", NOTHING },
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{ "sui 0x%02x", CONST8 },
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{ "rst 2", NOTHING },
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/* d8-df */
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{ "rc", NOTHING },
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{ "*ret", NOTHING },
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{ "jc 0x%04x", CONST16 },
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{ "in 0x%02x", CONST8 },
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{ "cc 0x%04x", CONST16 },
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{ "*call 0x%04x", CONST16 },
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{ "sbi 0x%02x", CONST8 },
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{ "rst 3", NOTHING },
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/* e0-e7 */
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{ "rpo", NOTHING },
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{ "pop h", NOTHING },
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{ "jpo 0x%04x", CONST16 },
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{ "xthl", NOTHING },
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{ "cpo 0x%04x", CONST16 },
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{ "push h", NOTHING },
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{ "ani 0x%02x", CONST8 },
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{ "rst 4", NOTHING },
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/* e8-ef */
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{ "rpe", NOTHING },
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{ "pchl", NOTHING },
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{ "jpe 0x%04x", CONST16 },
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{ "xchg", NOTHING },
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{ "cpe 0x%04x", CONST16 },
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{ "*call 0x%04x", CONST16 },
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{ "xri 0x%02x", CONST8 },
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{ "rst 5", NOTHING },
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/* f0-f7 */
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{ "rp", NOTHING },
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{ "pop psw", NOTHING },
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{ "jp 0x%04x", CONST16 },
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{ "di", NOTHING },
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{ "cp 0x%04x", CONST16 },
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{ "push psw", NOTHING },
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{ "ori 0x%02x", CONST8 },
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{ "rst 6", NOTHING },
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/* f8-ff */
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{ "rm", NOTHING },
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{ "sphl", NOTHING },
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{ "jm 0x%04x", CONST16 },
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{ "ei", NOTHING },
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{ "cm 0x%04x", CONST16 },
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{ "*call 0x%04x", CONST16 },
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{ "cpi 0x%02x", CONST8 },
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{ "rst 7", NOTHING },
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};
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uint16_t i8080_disassemble(char* buffer, size_t bufsiz, uint16_t pc)
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{
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uint8_t opcode = i8080_read(pc);
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uint8_t p1 = i8080_read(pc+1);
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uint8_t p2 = i8080_read(pc+2);
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struct insn* insn = &insns[opcode];
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uint16_t value = 0;
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const char* left = "";
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snprintf(buffer, bufsiz, "%04x : ", pc);
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pc++;
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switch (insn->operand)
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{
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case NOTHING:
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left = "%02x : ";
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break;
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case CONST8:
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left = "%02x %02x : ";
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value = p1;
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pc++;
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break;
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case CONST16:
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left = "%02x %02x %02x : ";
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value = p1 | (p2<<8);
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pc += 2;
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break;
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}
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snprintf(buffer + 7, bufsiz - 7, left, opcode, p1, p2);
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snprintf(buffer + 18, bufsiz - 18, insn->name, value);
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return pc;
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}
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