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Add support for the Game Boy MBC1M mapper

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This commit is contained in:
Lesserkuma 2022-09-25 16:51:05 +02:00
parent 140401161b
commit 866f0ce2b5
1 changed files with 25 additions and 1 deletions
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26
Cart_Reader/GB.ino
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@ -432,6 +432,8 @@ void showCartInfo_GB() {
print_Msg(F("HuC-3"));
else if (romType == 255)
print_Msg(F("HuC-1"));
else if ((romType == 0x101) || (romType == 0x103))
print_Msg(F("MBC1M"));
else if (romType == 0x104)
print_Msg(F("M161"));
@ -865,6 +867,17 @@ void getCartInfo_GB() {
romType = 0x0B;
}
// MBC1M
if (
(strncmp(romName, "MOMOCOL", 7) == 0) && (sdBuffer[0x14D] == 0x28) ||
(strncmp(romName, "BOMCOL", 6) == 0) && (sdBuffer[0x14D] == 0x86) ||
(strncmp(romName, "GENCOL", 6) == 0) && (sdBuffer[0x14D] == 0x8A) ||
(strncmp(romName, "SUPERCHINESE 123", 16) == 0) && (sdBuffer[0x14D] == 0xE4) ||
(strncmp(romName, "MORTALKOMBATI&II", 16) == 0) && (sdBuffer[0x14D] == 0xB9) ||
(strncmp(romName, "MORTALKOMBAT DUO", 16) == 0) && (sdBuffer[0x14D] == 0xA7)) {
romType += 0x100;
}
// ROM revision
romVersion = sdBuffer[0x14C];
}
@ -929,7 +942,18 @@ void readROM_GB() {
PORTH |= (1 << 0);
writeByte_GB(0x4000, currBank & 0x7);
}
// Set ROM bank for MBC1M
else if (romType == 0x101 || romType == 0x103) {
if (currBank < 10) {
writeByte_GB(0x4000, currBank >> 4);
writeByte_GB(0x2000, (currBank & 0x1f));
} else {
writeByte_GB(0x4000, currBank >> 4);
writeByte_GB(0x2000, 0x10 | (currBank & 0x1f));
}
}
// Set ROM bank for MBC2/3/4/5
else if (romType >= 5) {
if (romType >= 11 && romType <= 13) {