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Add support for the Game Boy M161 mapper

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This commit is contained in:
Lesserkuma 2022-09-24 14:38:55 +02:00
parent 77c0daeb6a
commit 3a9ccf65b0
1 changed files with 29 additions and 4 deletions
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33
Cart_Reader/GB.ino
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@ -426,6 +426,8 @@ void showCartInfo_GB() {
print_Msg(F("HuC-3")); print_Msg(F("HuC-3"));
else if (romType == 255) else if (romType == 255)
print_Msg(F("HuC-1")); print_Msg(F("HuC-1"));
else if (romType == 0x104)
print_Msg(F("M161"));
println_Msg(F(" ")); println_Msg(F(" "));
print_Msg(F("Rom Size: ")); print_Msg(F("Rom Size: "));
@ -815,6 +817,11 @@ void getCartInfo_GB() {
romName[i] = 0x00; romName[i] = 0x00;
myLength--; myLength--;
} }
// Detect M161 game
if ((strncmp(romName, "TETRIS SET", 9) == 0) && (sdBuffer[0x14D] == 0x3F)) {
romType = 0x104;
}
} }
/****************************************** /******************************************
@ -847,21 +854,39 @@ void readROM_GB() {
print_Error(F("Can't create file on SD"), true); print_Error(F("Can't create file on SD"), true);
} }
int endAddress = 0x7FFF;
word romAddress = 0; word romAddress = 0;
word startBank = 1;
//Initialize progress bar //Initialize progress bar
uint32_t processedProgressBar = 0; uint32_t processedProgressBar = 0;
uint32_t totalProgressBar = (uint32_t)(romBanks) * 16384; uint32_t totalProgressBar = (uint32_t)(romBanks) * 16384;
draw_progressbar(0, totalProgressBar); draw_progressbar(0, totalProgressBar);
for (word currBank = 1; currBank < romBanks; currBank++) { // M161 banks are double size and start with 0
if (romType == 0x104) {
startBank = 0;
romBanks >>= 1;
}
for (word currBank = startBank; currBank < romBanks; currBank++) {
// Second bank starts at 0x4000 // Second bank starts at 0x4000
if (currBank > 1) { if (currBank > 1) {
romAddress = 0x4000; romAddress = 0x4000;
} }
// M161 banks are double size and need mapper reset
if (romType == 0x104) {
romAddress = 0;
endAddress = 0x7FFF;
PORTH &= ~(1 << 0);
delay(50);
PORTH |= (1 << 0);
writeByte_GB(0x4000, currBank & 0x7);
}
// Set ROM bank for MBC2/3/4/5 // Set ROM bank for MBC2/3/4/5
if (romType >= 5) { else if (romType >= 5) {
if (romType >= 11 && romType <= 13) { if (romType >= 11 && romType <= 13) {
if ((currBank & 0x1f) == 0) { if ((currBank & 0x1f) == 0) {
// reset MMM01 // reset MMM01
@ -896,7 +921,7 @@ void readROM_GB() {
} }
// Read banks and save to SD // Read banks and save to SD
while (romAddress <= 0x7FFF) { while (romAddress <= endAddress) {
for (int i = 0; i < 512; i++) { for (int i = 0; i < 512; i++) {
sdBuffer[i] = readByte_GB(romAddress + i); sdBuffer[i] = readByte_GB(romAddress + i);
} }