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[WIP] solving mappers with bus conflicts

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solving mappers with bus conflicts, mapper 2 is fixed, more to come after more testing
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nsx0r 2022-12-10 15:05:16 +01:00 committed by GitHub
parent 93fba20d62
commit 95e795023d
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1 changed files with 67 additions and 52 deletions
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Cart_Reader/NES.ino
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@ -2497,6 +2497,7 @@ void readPRG(boolean readrom) {
} }
word base = 0x8000; word base = 0x8000;
bool busConflict = false;
if (myFile) { if (myFile) {
switch (mapper) { switch (mapper) {
@ -2531,13 +2532,27 @@ void readPRG(boolean readrom) {
} }
break; break;
case 2: // 128K/256K case 2: // bus conflicts - fixed last bank
for (int i = 0; i < 8; i++) { // 128K/256K banks = int_pow(2, prgsize);
write_prg_byte(0x8000, i); busConflict = true;
for (word address = 0x0; address < (((word)prgsize - 3) * 0x4000) + 0x4000; address += 512) { for (int i = 0; i < banks-1; i++) {
for (int x = 0; x < 0x4000; x++) {
if (read_prg_byte(0xC000 + x) == i) {
write_prg_byte(0xC000 + x, i);
busConflict = false;
break;
}
}
if (busConflict) {
write_prg_byte(0x8000 + i, i);
}
for (word address = 0x0; address < 0x4000; address += 512) {
dumpPRG(base, address); dumpPRG(base, address);
} }
} }
for (word address = 0x4000; address < 0x8000; address += 512) {
dumpPRG(base, address);
}
break; break;
case 4: case 4:
@ -2863,7 +2878,7 @@ void readPRG(boolean readrom) {
banks = int_pow(2, prgsize) / 2; // 32k banks banks = int_pow(2, prgsize) / 2; // 32k banks
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x6000, (i & 0x1E) >> 1); // high bits write_prg_byte(0x6000, (i & 0x1E) >> 1); // high bits
write_prg_byte(0x8000, i & 0x01); // low bit write_prg_byte(0x8000, i & 0x01); // low bit
for (word address = 0x0; address < 0x8000; address += 512) { for (word address = 0x0; address < 0x8000; address += 512) {
dumpPRG(base, address); dumpPRG(base, address);
} }
@ -3255,7 +3270,7 @@ void readPRG(boolean readrom) {
dumpPRG(base, address); dumpPRG(base, address);
} }
} }
for (word address = 0x4000; address < 0x8000; address += 512) { // last 16k bank fixed at $C000-$FFFF for (word address = 0x4000; address < 0x8000; address += 512) { // last 16k bank fixed at $C000-$FFFF
dumpPRG(base, address); dumpPRG(base, address);
} }
break; break;
@ -3315,10 +3330,10 @@ void readPRG(boolean readrom) {
case 178: case 178:
banks = int_pow(2, prgsize); banks = int_pow(2, prgsize);
write_prg_byte(0x4800, 0); // NROM-256 mode write_prg_byte(0x4800, 0); // NROM-256 mode
write_prg_byte(0x4803, 0); // set PRG-RAM write_prg_byte(0x4803, 0); // set PRG-RAM
for (int i = 0; i < banks; i += 2) { for (int i = 0; i < banks; i += 2) {
write_prg_byte(0x4802, i >> 3); // high PRG (up to 8 bits?!) write_prg_byte(0x4802, i >> 3); // high PRG (up to 8 bits?!)
write_prg_byte(0x4801, i & 0x07); // low PRG (3 bits) write_prg_byte(0x4801, i & 0x07); // low PRG (3 bits)
for (word address = 0x0; address < 0x8000; address += 512) { for (word address = 0x0; address < 0x8000; address += 512) {
dumpPRG(base, address); dumpPRG(base, address);
} }
@ -3863,7 +3878,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 42: case 42:
banks = int_pow(2, chrsize); banks = int_pow(2, chrsize);
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x8000, i & 0x0F); write_prg_byte(0x8000, i & 0x0F);
@ -3902,11 +3917,11 @@ void readCHR(boolean readrom) {
} }
break; break;
case 46: case 46:
banks = int_pow(2, chrsize); // 8k banks banks = int_pow(2, chrsize); // 8k banks
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x6000, (i & 0x78) << 1); // high bits write_prg_byte(0x6000, (i & 0x78) << 1); // high bits
write_prg_byte(0x8000, (i & 0x07) << 4); // low bits write_prg_byte(0x8000, (i & 0x07) << 4); // low bits
for (word address = 0x0; address < 0x2000; address += 512) { for (word address = 0x0; address < 0x2000; address += 512) {
dumpCHR(address); dumpCHR(address);
} }
@ -3915,7 +3930,7 @@ void readCHR(boolean readrom) {
case 52: case 52:
banks = int_pow(2, chrsize); banks = int_pow(2, chrsize);
write_prg_byte(0xA001, 0x80); // enable WRAM write write_prg_byte(0xA001, 0x80); // enable WRAM write
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x6000, (i & 0x04) << 2 | (i & 0x03) << 4 | 0x40); write_prg_byte(0x6000, (i & 0x04) << 2 | (i & 0x03) << 4 | 0x40);
for (word address = 0x0; address < 0x1000; address += 512) { for (word address = 0x0; address < 0x1000; address += 512) {
@ -3935,7 +3950,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 59: case 59:
banks = int_pow(2, chrsize) / 2; banks = int_pow(2, chrsize) / 2;
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x8000 + (i & 0x07), 0); write_prg_byte(0x8000 + (i & 0x07), 0);
@ -4186,7 +4201,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 113: case 113:
banks = int_pow(2, chrsize) / 2; banks = int_pow(2, chrsize) / 2;
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x4100, (i & 0x08) << 3 | (i & 0x07)); write_prg_byte(0x4100, (i & 0x08) << 3 | (i & 0x07));
@ -4196,7 +4211,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 126: case 126:
banks = int_pow(2, chrsize) * 2; banks = int_pow(2, chrsize) * 2;
write_prg_byte(0xA001, 0x80); // enable WRAM write_prg_byte(0xA001, 0x80); // enable WRAM
write_prg_byte(0x6003, 0x00); // set MMC3 banking mode write_prg_byte(0x6003, 0x00); // set MMC3 banking mode
@ -4212,20 +4227,20 @@ void readCHR(boolean readrom) {
} }
break; break;
case 134: case 134:
banks = int_pow(2, chrsize) * 2; banks = int_pow(2, chrsize) * 2;
write_prg_byte(0x6000, 0x00); // set MMC3 banking mode write_prg_byte(0x6000, 0x00); // set MMC3 banking mode
for (int i = 0; i < banks; i += 2) { for (int i = 0; i < banks; i += 2) {
write_prg_byte(0x6001, (i & 0x180) >> 3); // select outer bank write_prg_byte(0x6001, (i & 0x180) >> 3); // select outer bank
write_prg_byte(0x8000, 0); // 2k bank 0 at $0000 write_prg_byte(0x8000, 0); // 2k bank 0 at $0000
write_prg_byte(0x8001, i); write_prg_byte(0x8001, i);
write_prg_byte(0x8000, 1); // 2k bank 1 at $0800 write_prg_byte(0x8000, 1); // 2k bank 1 at $0800
write_prg_byte(0x8001, i + 2); write_prg_byte(0x8001, i + 2);
for (word address = 0x0; address < 0x1000; address += 512) { for (word address = 0x0; address < 0x1000; address += 512) {
dumpCHR(address); dumpCHR(address);
}
} }
break; }
break;
case 140: // 32K/128K case 140: // 32K/128K
banks = int_pow(2, chrsize) / 2; banks = int_pow(2, chrsize) / 2;
@ -4237,7 +4252,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 174: // 64k case 174: // 64k
for (int i = 0; i < 8; i++) { for (int i = 0; i < 8; i++) {
write_prg_byte(0xFF00 + (i << 1), 0); write_prg_byte(0xFF00 + (i << 1), 0);
for (word address = 0x0; address < 0x2000; address += 512) { for (word address = 0x0; address < 0x2000; address += 512) {
@ -4284,7 +4299,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 185: // 8K [READ 32K TO OVERRIDE LOCKOUT] case 185: // 8K [READ 32K TO OVERRIDE LOCKOUT]
for (int i = 0; i < 4; i++) { // Read 32K to locate valid 8K for (int i = 0; i < 4; i++) { // Read 32K to locate valid 8K
write_prg_byte(0x8000, i); write_prg_byte(0x8000, i);
byte chrcheck = read_chr_byte(0); byte chrcheck = read_chr_byte(0);
@ -4356,7 +4371,7 @@ void readCHR(boolean readrom) {
} }
break; break;
case 212: case 212:
banks = int_pow(2, chrsize) / 2; banks = int_pow(2, chrsize) / 2;
for (int i = 0; i < banks; i++) { for (int i = 0; i < banks; i++) {
write_prg_byte(0x8000 + (i & 0x07), 0); write_prg_byte(0x8000 + (i & 0x07), 0);