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Mapper30: Backport 4-screen mirroring support

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9b6ff8fe49
This commit is contained in:
retro-wertz
2018-06-15 11:30:23 +08:00
parent 1811ea1e06
commit 2bca72186d
2 changed files with 23 additions and 4 deletions
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18
src/boards/unrom512.c
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@@ -210,6 +210,8 @@ static void UNROM512HSync(void) {
}
void UNROM512_Init(CartInfo *info) {
int mirror;
memset(fceumm_flash_buf, 0x00, fceumm_flash_buf_size);
flash_state = 0;
flash_bank = 0;
@@ -222,7 +224,21 @@ void UNROM512_Init(CartInfo *info) {
else
chrram_mask = 0x60;
SetupCartMirroring(info->mirror, (info->mirror >= MI_0) ? 0 : 1, 0);
mirror = (head.ROM_type & 1) | ((head.ROM_type & 8) >> 2);
switch (mirror) {
case 0: // hard horizontal, internal
SetupCartMirroring(MI_H, 1, NULL);
break;
case 1: // hard vertical, internal
SetupCartMirroring(MI_V, 1, NULL);
break;
case 2: // switchable 1-screen, internal (flags: 4-screen + horizontal)
SetupCartMirroring(MI_0, 0, NULL);
break;
case 3: // hard four screen, last 8k of 32k RAM (flags: 4-screen + vertical)
SetupCartMirroring(4, 1, VROM + (info->vram_size - 8192));
break;
}
bus_conflict = !info->battery;
latcheinit = 0;
WLSync = UNROM512LSync;