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try to fix writes to palette mirrors

This commit is contained in:
zeromus 2018-11-07 04:01:36 -05:00
parent 01dfbf5afa
commit 286875f9ef
2 changed files with 13 additions and 5 deletions
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14
src/boards/mmc5.cpp
View File

@ -146,12 +146,18 @@ uint8* MMC5BGVRAMADR(uint32 A)
static void mmc5_PPUWrite(uint32 A, uint8 V) { static void mmc5_PPUWrite(uint32 A, uint8 V) {
uint32 tmp = A; uint32 tmp = A;
extern uint8 PALRAM[0x20]; extern uint8 PALRAM[0x20];
extern uint8 UPALRAM[0x03];
if (tmp >= 0x3F00) { if (tmp >= 0x3F00) {
// hmmm.... if (!(tmp & 3)) {
if (!(tmp & 0xf)) if (!(tmp & 0xC)) {
PALRAM[0x00] = PALRAM[0x04] = PALRAM[0x08] = PALRAM[0x0C] = V & 0x3F; PALRAM[0x00] = PALRAM[0x04] = PALRAM[0x08] = PALRAM[0x0C] = V & 0x3F;
else if (tmp & 3) PALRAM[(tmp & 0x1f)] = V & 0x3f; PALRAM[0x10] = PALRAM[0x14] = PALRAM[0x18] = PALRAM[0x1C] = V & 0x3F;
}
else
UPALRAM[((tmp & 0xC) >> 2) - 1] = V & 0x3F;
} else
PALRAM[tmp & 0x1F] = V & 0x3F;
} else if (tmp < 0x2000) { } else if (tmp < 0x2000) {
if (PPUCHRRAM & (1 << (tmp >> 10))) if (PPUCHRRAM & (1 << (tmp >> 10)))
VPage[tmp >> 10][tmp] = V; VPage[tmp >> 10][tmp] = V;

4
src/ppu.cpp
View File

@ -430,8 +430,10 @@ inline void FFCEUX_PPUWrite_Default(uint32 A, uint8 V) {
vnapage[((tmp & 0xF00) >> 10)][tmp & 0x3FF] = V; vnapage[((tmp & 0xF00) >> 10)][tmp & 0x3FF] = V;
} else { } else {
if (!(tmp & 3)) { if (!(tmp & 3)) {
if (!(tmp & 0xC)) if (!(tmp & 0xC)) {
PALRAM[0x00] = PALRAM[0x04] = PALRAM[0x08] = PALRAM[0x0C] = V & 0x3F; PALRAM[0x00] = PALRAM[0x04] = PALRAM[0x08] = PALRAM[0x0C] = V & 0x3F;
PALRAM[0x10] = PALRAM[0x14] = PALRAM[0x18] = PALRAM[0x1C] = V & 0x3F;
}
else else
UPALRAM[((tmp & 0xC) >> 2) - 1] = V & 0x3F; UPALRAM[((tmp & 0xC) >> 2) - 1] = V & 0x3F;
} else } else