6502/perfect6502
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This commit is contained in:
Michael Steil 2010-09-26 03:19:21 +00:00
parent a4f19434f7
commit bfe8db1446
1 changed files with 82 additions and 29 deletions
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111
perfect6502.c
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@ -1061,6 +1061,7 @@ struct {
BOOL crash;
int length;
int cycles;
int addmode;
BOOL zp;
BOOL abs;
BOOL zpx;
@ -1083,6 +1084,18 @@ struct {
BOOL outputp;
} data[256];
enum {
ADDMODE_UNKNOWN,
ADDMODE_IZY,
ADDMODE_IZX,
ADDMODE_ZPY,
ADDMODE_ZPX,
ADDMODE_ZP,
ADDMODE_ABSY,
ADDMODE_ABSX,
ADDMODE_ABS,
};
uint16_t initial_s, initial_p, initial_a, initial_x, initial_y;
void
@ -1131,11 +1144,11 @@ main()
/* set up data structures for efficient emulation */
setupNodesAndTransistors();
verbose = 0;
verbose = 1;
for (int opcode = 0x00; opcode <= 0xFF; opcode++) {
// for (int opcode = 0x00; opcode <= 0xFF; opcode++) {
// for (int opcode = 0xA9; opcode <= 0xAA; opcode++) {
// for (int opcode = 0x26; opcode <= 0x26; opcode++) {
for (int opcode = 0x15; opcode <= 0x15; opcode++) {
printf("$%02X: ", opcode);
/**************************************************
@ -1199,7 +1212,7 @@ main()
data[opcode].reads = NO;
data[opcode].writes = NO;
for (i = 0; i < data[opcode].cycles * 2; i++) {
for (i = 0; i < data[opcode].cycles * 2 + 2; i++) {
step();
if (IS_READ_CYCLE || IS_WRITE_CYCLE) {
//printf("RW@ %X\n", readAddressBus());
@ -1230,6 +1243,25 @@ main()
}
};
data[opcode].addmode = ADDMODE_UNKNOWN;
if (data[opcode].izy) {
data[opcode].addmode = ADDMODE_IZY;
} else if (data[opcode].izx) {
data[opcode].addmode = ADDMODE_IZX;
} else if (data[opcode].zpy) {
data[opcode].addmode = ADDMODE_ZPY;
} else if (data[opcode].zpx) {
data[opcode].addmode = ADDMODE_ZPX;
} else if (data[opcode].zp) {
data[opcode].addmode = ADDMODE_ZP;
} else if (data[opcode].absy) {
data[opcode].addmode = ADDMODE_ABSY;
} else if (data[opcode].absx) {
data[opcode].addmode = ADDMODE_ABSX;
} else if (data[opcode].abs) {
data[opcode].addmode = ADDMODE_ABS;
}
/**************************************************/
uint8_t magics[] = {
@ -1246,13 +1278,13 @@ main()
/**************************************************
* find out inputs
**************************************************/
printf("AAA\n");
for (int k = 0; k < 5; k++) {
BOOL different = NO;
int reads, writes;
uint16_t read[100], write[100], write_data[100];
uint8_t end_a, end_x, end_y, end_s, end_p;
for (int j = 0; j < sizeof(magics)/sizeof(*magics) - 5; j++) {
for (int j = 0; j < sizeof(magics)/sizeof(*magics); j++) {
setup_memory(opcode);
if (data[opcode].length == 2) {
memory[INSTRUCTION_ADDR + 1] = MAGIC_8;
@ -1267,10 +1299,37 @@ main()
case 3: memory[initial_s] = magics[j]; break;
case 4: memory[initial_p] = magics[j]; break;
}
#define MAGIC_DATA8 3
switch (data[opcode].addmode) {
case ADDMODE_IZY:
//TODO
break;
case ADDMODE_IZX:
//TODO
break;
case ADDMODE_ZPY:
memory[MAGIC_8 + memory[initial_y]] = MAGIC_DATA8;
break;
case ADDMODE_ZPX:
memory[MAGIC_8 + memory[initial_x]] = MAGIC_DATA8;
break;
case ADDMODE_ZP:
memory[MAGIC_8] = MAGIC_DATA8;
break;
case ADDMODE_ABSY:
memory[MAGIC_16 + memory[initial_y]] = MAGIC_DATA8;
break;
case ADDMODE_ABSX:
memory[MAGIC_16 + memory[initial_x]] = MAGIC_DATA8;
break;
case ADDMODE_ABS:
memory[MAGIC_16] = MAGIC_DATA8;
break;
}
initChip();
writes = 0;
reads = 0;
for (i = 0; i < data[opcode].cycles * 2; i++) {
for (i = 0; i < data[opcode].cycles * 2 + 2; i++) {
step();
if (IS_READ_CYCLE) {
if (!j)
@ -1368,6 +1427,7 @@ main()
case 4: data[opcode].inputp = different; break;
}
}
printf("BBB\n");
/**************************************************
* find out outputs
@ -1386,7 +1446,7 @@ main()
memory[initial_s] = magics[j + 3];
memory[initial_p] = magics[j + 4];
initChip();
for (i = 0; i < data[opcode].cycles * 2; i++) {
for (i = 0; i < data[opcode].cycles * 2 + 2; i++) {
step();
};
if (readA() != magics[j + 0])
@ -1466,36 +1526,29 @@ main()
else
printf("_");
printf(" - ");
printf(" ");
if (data[opcode].reads)
printf("r");
printf("R");
else
printf(" ");
printf("_");
if (data[opcode].writes)
printf("w");
printf("W");
else
printf(" ");
printf("_");
printf(" ");
if (data[opcode].izy) {
printf("izy ");
} else if (data[opcode].izx) {
printf("izx ");
} else if (data[opcode].zpy) {
printf("zpy ");
} else if (data[opcode].zpx) {
printf("zpx ");
} else if (data[opcode].zp) {
printf("zp ");
} else if (data[opcode].absy) {
printf("absy ");
} else if (data[opcode].absx) {
printf("absx ");
} else if (data[opcode].abs) {
printf("abs ");
switch (data[opcode].addmode) {
case ADDMODE_IZY: printf("izy"); break;
case ADDMODE_IZX: printf("izx"); break;
case ADDMODE_ZPY: printf("zpy"); break;
case ADDMODE_ZPX: printf("zpx"); break;
case ADDMODE_ZP: printf("zp"); break;
case ADDMODE_ABSY: printf("absy"); break;
case ADDMODE_ABSX: printf("absx"); break;
case ADDMODE_ABS: printf("abs"); break;
}
printf("\n");