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fix to coolboy

This commit is contained in:
CaH4e3 2015-07-12 20:53:23 +00:00
parent 4fd8715890
commit e59106e35b
1 changed files with 9 additions and 5 deletions
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12
trunk/src/boards/coolboy.cpp
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@ -24,7 +24,6 @@
* 6001 (xxx354x)
* 6002 = 0
* 6003 = 0
* 6003 = 0
*
* hardware tested logic, don't try to understand lol
*/
@ -42,7 +41,12 @@ static void COOLBOYCW(uint32 A, uint8 V) {
case 0x0C00: V &= 0x7F; break;
}
}
setchr8((((EXPREGS[2] & 0x0F) | ((V & 0x80) >> 3)) & (mask >> 3)) | ((((EXPREGS[0] & 0x08) << 4) & ~mask) >> 3));
// Highest bit goes from MMC3 registers when EXPREGS[3]&0x80==0 or from EXPREGS[0]&0x08 otherwise
setchr1(A,
(V & 0x80 & mask) | ((((EXPREGS[0] & 0x08) << 4) & (mask ^ 0xff))) // 7th bit
| ((EXPREGS[2] & 0x0F) << 3) // 6-3 bits
| ((A >> 10) & 7) // 2-0 bits
);
} else {
if (EXPREGS[3] & 0x40) { // Weird mode, again
int cbase = (MMC3_cmd & 0x80) << 5;
@ -83,9 +87,9 @@ static void COOLBOYPW(uint32 A, uint8 V) {
else { // NROM mode
mask &= 0xF0;
uint8 emask;
if (!(EXPREGS[1] & 2)) // 4kb mode, 0xC000-0xFFFF is same as 0x8000-0xBFFF
if (!(EXPREGS[1] & 2)) // 16kb mode, 0xC000-0xFFFF is same as 0x8000-0xBFFF
emask = EXPREGS[3] & 0x0E;
else // 8kb mode, using second-last bank
else // 32kb mode, using second-last bank
emask = (EXPREGS[3] & 0x0C) | ((A >= 0xC000) ? 2 : 0);
emask |= (A >> 13) & 1; // does not depends on MMC3_cmd&0x40
setprg8(A, (((base << 4) & ~mask) | (V & mask) | emask));