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Fix for NES "TMNT2" (Japan, VRC4)

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splash5 2022-12-25 01:22:13 +08:00
parent 1ef40b1f89
commit cf9b70554f
1 changed files with 6 additions and 4 deletions
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10
Cart_Reader/NES.ino
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@ -2726,6 +2726,11 @@ void readPRG(boolean readrom) {
case 65:
case 75: // 128K/256K
banks = int_pow(2, prgsize) * 2;
// set vrc4 swap setting for TMNT2
if (mapper == 25)
write_prg_byte(0x9005, 0x00);
for (int i = 0; i < banks; i += 2) {
write_prg_byte(0x8000, i);
write_prg_byte(0xA000, i + 1);
@ -3892,10 +3897,7 @@ void readCHR(boolean readrom) {
banks = int_pow(2, chrsize) * 4;
for (int i = 0; i < banks; i++) {
write_prg_byte(0xB000, i & 0xF); // CHR Bank Lower 4 bits
if ((ramsize > 0) || (banks == 128)) // VRC2c (Ganbare Goemon Gaiden)/VRC4b (Bio Miracle/Gradius 2/Racer Mini)
write_prg_byte(0xB002, (i >> 4) & 0xF); // CHR Bank Upper 4 bits VRC2c/VRC4b
else
write_prg_byte(0xB008, (i >> 4) & 0xF); // CHR Bank Upper 4 bits VRC4d (Teenage Mutant Ninja Turtles)
write_prg_byte(0xB00A, (i >> 4) & 0xF); // Combine VRC2c and VRC4b, VRC4d reg
for (word address = 0x0; address < 0x400; address += 512) {
dumpCHR(address);
}