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Update NES.ino - fix for SEROM/SHROM/SH1ROM PCBs

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fix for SEROM/SHROM/SH1ROM PCBs
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nsx0r 2024-12-31 08:14:25 +00:00 committed by GitHub
parent fb8835b6c4
commit 2100cd55f6
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1 changed files with 15 additions and 10 deletions
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Cart_Reader/NES.ino
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@ -1850,16 +1850,21 @@ void readPRG(bool readrom) {
case 1: case 1:
case 155: // 32K/64K/128K/256K/512K case 155: // 32K/64K/128K/256K/512K
banks = int_pow(2, prgsize); if (prgsize == 1) { // fix for SEROM/SHROM/SH1ROM PCBs
for (size_t i = 0; i < banks; i++) { // 16K Banks ($8000-$BFFF) write_prg_byte(0x8000, 0x80);
write_prg_byte(0x8000, 0x80); // Clear Register dumpBankPRG(0x0, 0x8000, base);
write_mmc1_byte(0x8000, 0x0C); // Switch 16K Bank ($8000-$BFFF) + Fixed Last Bank ($C000-$FFFF) } else {
if (prgsize > 4) // 512K banks = int_pow(2, prgsize);
write_mmc1_byte(0xA000, 0x00); // Reset 512K Flag for Lower 256K for (size_t i = 0; i < banks; i++) { // 16K Banks ($8000-$BFFF)
if (i > 15) // Switch Upper 256K write_prg_byte(0x8000, 0x80); // Clear Register
write_mmc1_byte(0xA000, 0x10); // Set 512K Flag write_mmc1_byte(0x8000, 0x0C); // Switch 16K Bank ($8000-$BFFF) + Fixed Last Bank ($C000-$FFFF)
write_mmc1_byte(0xE000, i); if (prgsize > 4) // 512K
dumpBankPRG(0x0, 0x4000, base); write_mmc1_byte(0xA000, 0x00); // Reset 512K Flag for Lower 256K
if (i > 15) // Switch Upper 256K
write_mmc1_byte(0xA000, 0x10); // Set 512K Flag
write_mmc1_byte(0xE000, i);
dumpBankPRG(0x0, 0x4000, base);
}
} }
break; break;