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This commit is contained in:
Michael Steil 2010-09-26 00:09:19 +00:00
parent 0866a57020
commit 7a1e8b457b
1 changed files with 124 additions and 7 deletions
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131
perfect6502.c
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@ -1071,6 +1071,12 @@ struct {
BOOL izy;
BOOL reads;
BOOL writes;
BOOL inputa;
BOOL outputa;
BOOL outputx;
BOOL outputy;
BOOL outputs;
BOOL outputp;
} data[256];
uint16_t initial_s, initial_p, initial_a, initial_x, initial_y;
@ -1220,6 +1226,82 @@ main()
}
};
/**************************************************
* find out whether A is an input
**************************************************/
#define MAGIC_A_1 0x17
#define MAGIC_A_2 0xEA
setup_memory(opcode);
memory[initial_a] = MAGIC_A_1;
initChip();
for (i = 0; i < data[opcode].cycles * 2; i++) {
step();
};
DECLARE_BITMAP(transistors_1, TRANSISTORS);
memcpy(transistors_on, transistors_1, sizeof(transistors_on));
setup_memory(opcode);
memory[initial_a] = MAGIC_A_2;
initChip();
for (i = 0; i < data[opcode].cycles * 2; i++) {
step();
};
BOOL identical = YES;
for (count_t t = 0; t < TRANSISTORS; t++) {
if (get_transistors_on(i) != get_bitmap(transistors_1, i)) {
identical = NO;
break;
}
}
data[opcode].inputa = !identical;
uint8_t magics[] = {
/* all 8 bit primes */
2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
// 31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
// 73, 79, 83, 89, 97, 101, 103, 107, 109, 113,
// 127, 131, 137, 139, 149, 151, 157, 163, 167, 173,
// 179, 181, 191, 193, 197, 199, 211, 223, 227, 229,
233, 239, 241, 251,
/* and some other interesting numbers */
0, 1, 0x55, 0xAA, 0xFF
};
/**************************************************
* find out inputs
**************************************************/
//xxx
/**************************************************
* find out outputs
**************************************************/
data[opcode].outputa = NO;
data[opcode].outputx = NO;
data[opcode].outputy = NO;
data[opcode].outputs = NO;
data[opcode].outputp = NO;
for (int j = 0; j < sizeof(magics)/sizeof(*magics) - 5; j++) {
setup_memory(opcode);
memory[initial_a] = magics[j + 0];
memory[initial_x] = magics[j + 1];
memory[initial_y] = magics[j + 2];
memory[initial_s] = magics[j + 3];
memory[initial_p] = magics[j + 4];
initChip();
for (i = 0; i < data[opcode].cycles * 2; i++) {
step();
};
if (readA() != magics[j + 0])
data[opcode].outputa = YES;
if (readX() != magics[j + 1])
data[opcode].outputx = YES;
if (readY() != magics[j + 2])
data[opcode].outputy = YES;
if (readSP() != magics[j + 3])
data[opcode].outputs = YES;
if ((readP() & 0xCF) != (magics[j + 4] & 0xCF)) /* NV#BDIZC */
data[opcode].outputp = YES;
}
}
if (data[opcode].crash) {
printf("CRASH\n");
@ -1242,6 +1324,48 @@ main()
printf("r: %d ", data[opcode].reads);
printf("w: %d ", data[opcode].writes);
#else
if (data[opcode].inputa)
printf("A");
else
printf("_");
printf("=>");
if (data[opcode].outputa)
printf("A");
else
printf("_");
if (data[opcode].outputx)
printf("X");
else
printf("_");
if (data[opcode].outputy)
printf("Y");
else
printf("_");
if (data[opcode].outputs)
printf("S");
else
printf("_");
if (data[opcode].outputp)
printf("P");
else
printf("_");
printf(" - ");
if (data[opcode].reads)
printf("r");
else
printf(" ");
if (data[opcode].writes)
printf("w");
else
printf(" ");
printf(" ");
if (data[opcode].izy) {
printf("izy ");
} else if (data[opcode].izx) {
@ -1260,13 +1384,6 @@ main()
printf("abs ");
}
if (data[opcode].reads) {
printf("r");
}
if (data[opcode].writes) {
printf("w ");
}
#endif
printf("\n");
}