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Update mapper 454

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This commit is contained in:
NewRisingSun
2025-03-31 00:27:21 +02:00
committed by LibretroAdmin
parent 6cbcb160de
commit 4ccf99ab2e
1 changed files with 10 additions and 10 deletions
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20
src/boards/454.c
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@@ -19,8 +19,6 @@
*
*/
/* NOTE: Only loading Contra after a reset? RAM init also affects powerup */
#include "mapinc.h"
#include "latch.h"
@@ -28,18 +26,13 @@ static void Sync(void) {
uint8 prg = ((latch.addr >> 3) & 0x20) | ((latch.addr >> 2) & 0x1F);
uint8 cpuA14 = latch.addr & 0x01;
uint8 nrom = (latch.addr >> 7) & 0x01;
uint8 unrom = (latch.addr >> 9) & 0x01;
uint8 unrom = (latch.addr >> 8) & 0x01;
setprg16(0x8000, ((prg & ~cpuA14) & ~(0x07 * unrom)) | (latch.data * unrom));
setprg16(0xC000, ((prg | cpuA14) & ~(0x07 * !nrom * !unrom)) | (0x07 * !nrom * unrom));
setprg16(0xC000, ((prg | cpuA14) & ~(0x1F * !nrom * !unrom)) | (0x07 * unrom));
SetupCartCHRMapping(0, CHRptr[0], 0x2000, latch.addr &0x80? 0: 1);
setchr8(0);
setmirror(((latch.addr >> 1) & 0x01) ^ 0x01);
if (nrom) {
/* CHR-RAM write protect hack, needed for some multicarts */
SetupCartCHRMapping(0, CHRptr[0], 0x2000, 0);
} else {
SetupCartCHRMapping(0, CHRptr[0], 0x2000, 1);
}
}
static DECLFW(M454Write) {
@@ -57,7 +50,14 @@ static void M454Power(void) {
SetWriteHandler(0x8000, 0xFFFF, M454Write);
}
static void M454Reset(void) {
latch.addr = 0;
latch.data = 0;
Sync();
}
void Mapper454_Init(CartInfo *info) {
Latch_Init(info, Sync, NULL, 0, 0);
info->Power = M454Power;
info->Reset = M454Reset;
}