Mirrors/cartreader
2
0
Fork 0
mirror of https://github.com/sanni/cartreader.git synced 2025-02-10 10:18:52 +01:00
Code Issues Projects Releases Wiki Activity

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

Browse Source 
fix for SEROM/SHROM/SH1ROM PCBs
This commit is contained in:
nsx0r 2024-12-31 08:14:25 +00:00 committed by GitHub
parent fb8835b6c4
commit 2100cd55f6
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 15 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
Cart_Reader/NES.ino
View File

@ -1850,16 +1850,21 @@ void readPRG(bool readrom) {
case 1:
case 155: // 32K/64K/128K/256K/512K
banks = int_pow(2, prgsize);
for (size_t i = 0; i < banks; i++) { // 16K Banks ($8000-$BFFF)
write_prg_byte(0x8000, 0x80); // Clear Register
write_mmc1_byte(0x8000, 0x0C); // Switch 16K Bank ($8000-$BFFF) + Fixed Last Bank ($C000-$FFFF)
if (prgsize > 4) // 512K
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);
if (prgsize == 1) { // fix for SEROM/SHROM/SH1ROM PCBs
write_prg_byte(0x8000, 0x80);
dumpBankPRG(0x0, 0x8000, base);
} else {
banks = int_pow(2, prgsize);
for (size_t i = 0; i < banks; i++) { // 16K Banks ($8000-$BFFF)
write_prg_byte(0x8000, 0x80); // Clear Register
write_mmc1_byte(0x8000, 0x0C); // Switch 16K Bank ($8000-$BFFF) + Fixed Last Bank ($C000-$FFFF)
if (prgsize > 4) // 512K
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;