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Add mapper 454

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libretroadmin 2024-06-10 19:52:48 +02:00
parent a852437463
commit 4588e03500
3 changed files with 65 additions and 0 deletions
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63
src/boards/454.c Normal file
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@ -0,0 +1,63 @@
/* FCEUmm - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2023-2024 negativeExponent
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/* NOTE: Only loading Contra after a reset? RAM init also affects powerup */
#include "mapinc.h"
#include "latch.h"
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;
setprg16(0x8000, ((prg & ~cpuA14) & ~(0x07 * unrom)) | (latch.data * unrom));
setprg16(0xC000, ((prg | cpuA14) & ~(0x07 * !nrom * !unrom)) | (0x07 * !nrom * unrom));
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) {
if (latch.addr & 0x100) {
latch.data = V & 0x07;
} else {
latch.data = V;
latch.addr = A;
}
Sync();
}
static void M454Power(void) {
LatchPower();
SetWriteHandler(0x8000, 0xFFFF, M454Write);
}
void Mapper454_Init(CartInfo *info) {
Latch_Init(info, Sync, NULL, 0, 0);
info->Power = M454Power;
}

1
src/ines.c
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@ -829,6 +829,7 @@ INES_BOARD_BEGIN()
INES_BOARD( "22-in-1 King Series", 449, Mapper449_Init )
INES_BOARD( "DS-9-27", 452, Mapper452_Init )
INES_BOARD( "Realtec 8042", 453, Mapper453_Init )
INES_BOARD( "110-in-1", 454, Mapper454_Init )
INES_BOARD( "N625836", 455, Mapper455_Init )
INES_BOARD( "K6C3001A", 456, Mapper456_Init )
INES_BOARD( "810431C", 457, Mapper457_Init )

1
src/ines.h
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@ -339,6 +339,7 @@ void Mapper448_Init(CartInfo *);
void Mapper449_Init(CartInfo *);
void Mapper452_Init(CartInfo *);
void Mapper453_Init(CartInfo *);
void Mapper454_Init(CartInfo *);
void Mapper455_Init(CartInfo *);
void Mapper456_Init(CartInfo *);
void Mapper457_Init(CartInfo *);