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mapper63: try fixing openbus reads again

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This commit is contained in:
retro-wertz
2019-05-31 19:45:45 +08:00
parent 40bf11bb63
commit 5c4a659b49
1 changed files with 6 additions and 2 deletions
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8
src/boards/addrlatch.c
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@@ -202,9 +202,12 @@ void Mapper61_Init(CartInfo *info) {
* - Powerful 250-in-1
* - Hello Kitty 255-in-1 */
static uint16 openBus;
static DECLFR(M63Read) {
if (latche & 0x0300)
return X.DB;
if (A < 0xC000)
if (openBus)
return X.DB;
return CartBR(A);
}
@@ -213,6 +216,7 @@ static void M63Sync(void) {
uint16 prg_bank = (latche & 0x3F8) >> 1;
uint16 prg16 = (latche & 4) >> 1;
openBus = ((latche & 0x300) == 0x300);
setprg8(0x8000, (prg_bank | (mode ? 0 : prg16 | 0)));
setprg8(0xA000, (prg_bank | (mode ? 1 : prg16 | 1)));
setprg8(0xC000, (prg_bank | (mode ? 2 : prg16 | 0)));