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https://github.com/mist64/perfect6502.git
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This commit is contained in:
Michael Steil
parent
7a1e8b457b
commit
a4f19434f7
201
perfect6502.c
201
perfect6502.c
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@ -1072,6 +1072,10 @@ struct {
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BOOL reads;
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BOOL writes;
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BOOL inputa;
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BOOL inputx;
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BOOL inputy;
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BOOL inputs;
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BOOL inputp;
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BOOL outputa;
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BOOL outputx;
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BOOL outputy;
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@ -1131,7 +1135,7 @@ main()
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for (int opcode = 0x00; opcode <= 0xFF; opcode++) {
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// for (int opcode = 0xA9; opcode <= 0xAA; opcode++) {
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// for (int opcode = 0xB1; opcode <= 0xB1; opcode++) {
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// for (int opcode = 0x26; opcode <= 0x26; opcode++) {
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printf("$%02X: ", opcode);
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/**************************************************
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@ -1226,35 +1230,7 @@ main()
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}
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};
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/**************************************************
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* find out whether A is an input
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**************************************************/
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#define MAGIC_A_1 0x17
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#define MAGIC_A_2 0xEA
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setup_memory(opcode);
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memory[initial_a] = MAGIC_A_1;
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initChip();
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for (i = 0; i < data[opcode].cycles * 2; i++) {
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step();
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};
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DECLARE_BITMAP(transistors_1, TRANSISTORS);
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memcpy(transistors_on, transistors_1, sizeof(transistors_on));
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setup_memory(opcode);
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memory[initial_a] = MAGIC_A_2;
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initChip();
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for (i = 0; i < data[opcode].cycles * 2; i++) {
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step();
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};
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BOOL identical = YES;
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for (count_t t = 0; t < TRANSISTORS; t++) {
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if (get_transistors_on(i) != get_bitmap(transistors_1, i)) {
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identical = NO;
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break;
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}
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}
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data[opcode].inputa = !identical;
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/**************************************************/
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uint8_t magics[] = {
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/* all 8 bit primes */
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@ -1270,7 +1246,129 @@ main()
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/**************************************************
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* find out inputs
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**************************************************/
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//xxx
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for (int k = 0; k < 5; k++) {
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BOOL different = NO;
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int reads, writes;
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uint16_t read[100], write[100], write_data[100];
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uint8_t end_a, end_x, end_y, end_s, end_p;
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for (int j = 0; j < sizeof(magics)/sizeof(*magics) - 5; j++) {
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setup_memory(opcode);
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if (data[opcode].length == 2) {
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memory[INSTRUCTION_ADDR + 1] = MAGIC_8;
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} else if (data[opcode].length == 3) {
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memory[INSTRUCTION_ADDR + 1] = MAGIC_16 & 0xFF;
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memory[INSTRUCTION_ADDR + 2] = MAGIC_16 >> 8;
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}
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switch (k) {
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case 0: memory[initial_a] = magics[j]; break;
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case 1: memory[initial_x] = magics[j]; break;
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case 2: memory[initial_y] = magics[j]; break;
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case 3: memory[initial_s] = magics[j]; break;
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case 4: memory[initial_p] = magics[j]; break;
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}
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initChip();
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writes = 0;
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reads = 0;
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for (i = 0; i < data[opcode].cycles * 2; i++) {
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step();
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if (IS_READ_CYCLE) {
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if (!j)
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read[reads++] = readAddressBus();
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else
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if (read[reads++] != readAddressBus()) {
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different = YES;
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//printf("[[[%d]]]", __LINE__);
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break;
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}
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}
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if (IS_WRITE_CYCLE) {
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if (!j) {
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write[writes] = readAddressBus();
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write_data[writes++] = readDataBus();
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} else {
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if (write[writes] != readAddressBus()) {
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different = YES;
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//printf("[[[%d]]]", __LINE__);
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break;
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}
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if (write_data[writes++] != readDataBus()) {
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//printf("[[[%d:k=%d;%x@%x/%x]]]", __LINE__, k, write[writes-1], write_data[writes-1], readDataBus());
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different = YES;
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break;
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}
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}
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}
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};
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if (different) /* bus cycles were different */
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break;
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/* changes A */
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if (!(k == 0)) {
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if (!j) {
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end_a = readA();
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} else {
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if (end_a != readA()) {
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different = YES;
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break;
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}
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}
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}
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/* changes X */
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if (!(k == 1)) {
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if (!j) {
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end_x = readX();
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} else {
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if (end_x != readX()) {
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different = YES;
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break;
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}
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}
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}
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/* changes Y */
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if (!(k == 2)) {
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if (!j) {
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end_y = readY();
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} else {
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if (end_y != readY()) {
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different = YES;
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break;
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}
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}
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}
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/* changes S */
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if (!(k == 3)) {
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if (!j) {
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end_s = readSP();
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} else {
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if (end_s != readSP()) {
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different = YES;
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//printf("[%x/%x]", end_s, readSP());
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break;
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}
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}
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}
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/* changes P */
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if (!(k == 4)) {
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if (!j) {
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end_p = readP();
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} else {
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if (end_p != readP()) {
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different = YES;
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break;
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}
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}
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}
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}
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//printf("[%d DIFF: %d]", k, different);
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switch (k) {
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case 0: data[opcode].inputa = different; break;
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case 1: data[opcode].inputx = different; break;
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case 2: data[opcode].inputy = different; break;
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case 3: data[opcode].inputs = different; break;
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case 4: data[opcode].inputp = different; break;
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}
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}
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/**************************************************
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* find out outputs
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**************************************************/
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@ -1303,6 +1401,18 @@ main()
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data[opcode].outputp = YES;
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}
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}
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if (data[opcode].absx || data[opcode].zpx || data[opcode].izx) {
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if (!data[opcode].inputx)
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printf("input X?? ");
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data[opcode].inputx = NO;
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}
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if (data[opcode].absy || data[opcode].zpy || data[opcode].izy) {
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if (!data[opcode].inputy)
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printf("input Y?? ");
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data[opcode].inputy = NO;
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}
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if (data[opcode].crash) {
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printf("CRASH\n");
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} else {
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@ -1312,22 +1422,26 @@ main()
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else
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printf("%d ", data[opcode].length);
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printf("cycles: %d ", data[opcode].cycles);
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#if 0
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printf("zp: %d ", data[opcode].zp);
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printf("abs: %d ", data[opcode].abs);
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printf("zpx: %d ", data[opcode].zpx);
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printf("absx: %d ", data[opcode].absx);
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printf("zpy: %d ", data[opcode].zpy);
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printf("absy: %d ", data[opcode].absy);
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printf("izx: %d ", data[opcode].izx);
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printf("izy: %d ", data[opcode].izy);
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printf("r: %d ", data[opcode].reads);
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printf("w: %d ", data[opcode].writes);
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#else
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if (data[opcode].inputa)
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printf("A");
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else
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printf("_");
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if (data[opcode].inputx)
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printf("X");
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else
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printf("_");
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if (data[opcode].inputy)
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printf("Y");
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else
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printf("_");
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if (data[opcode].inputs)
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printf("S");
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else
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printf("_");
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if (data[opcode].inputp)
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printf("P");
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else
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printf("_");
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printf("=>");
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@ -1384,7 +1498,6 @@ main()
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printf("abs ");
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}
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#endif
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printf("\n");
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}
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}
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