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Mapper 458: Add submapper 1.

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NewRisingSun
2025-09-12 15:00:54 +02:00
parent b84b485669
commit 7c05fe4723
1 changed files with 37 additions and 40 deletions
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77
src/boards/458.c
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@@ -1,7 +1,7 @@
/* FCEUmm - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2023
* Copyright (C) 2020
*
* 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
@@ -16,58 +16,55 @@
* 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
*
*
*/
#include "mapinc.h"
#include "mmc3.h"
#include "asic_mmc3.h"
static void M458CW(uint32 A, uint8 V) {
setchr1(A, ((EXPREGS[0] << 4) & ~0x7F) | (V & 0x7F));
static uint8 submapper;
static uint8 reg;
static uint8 pad;
static DECLFR (readPad) {
return CartBR(A &~0xF | pad &0xF);
}
static void M458PW(uint32 A, uint8 V) {
if (EXPREGS[0] & 0x10) {
setprg32(0x8000, EXPREGS[0] >> 1);
} else {
setprg16(0x8000, EXPREGS[0]);
setprg16(0xC000, EXPREGS[0]);
static void sync () {
if (reg &(submapper == 1? 0x08: 0x10))
setprg32(0x8000, reg >>1);
else {
setprg16(0x8000, reg);
setprg16(0xC000, reg);
}
MMC3_syncCHR(0x7F, reg <<4 &~0x7F);
MMC3_syncMirror();
SetReadHandler(0x8000, 0xFFFF, reg &(submapper == 1? 0x80: 0x20)? readPad: CartBR);
}
static DECLFR(M458Read) {
if ((EXPREGS[0] & 0x20) && (EXPREGS[1] & 3)) {
return CartBR((A & ~3) | (EXPREGS[1] & 3));
}
return CartBR(A);
static DECLFW (writeReg) {
reg = A &0xFF;
sync();
}
static DECLFW(M458Write) {
if (MMC3CanWriteToWRAM()) {
EXPREGS[0] = A & 0xFF;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
static void reset () {
reg = 0;
pad++;
MMC3_clear();
}
static void M458Reset(void) {
EXPREGS[0] = 0;
EXPREGS[1]++;
MMC3RegReset();
static void power () {
reg = 0;
pad = 0;
MMC3_power();
}
static void M458Power(void) {
EXPREGS[0] = 0;
EXPREGS[1] = 0;
GenMMC3Power();
SetReadHandler(0x8000, 0xFFFF, M458Read);
SetWriteHandler(0x6000, 0x7FFF, M458Write);
}
void Mapper458_Init(CartInfo *info) {
GenMMC3_Init(info, 256, 256, 0, 0);
cwrap = M458CW;
pwrap = M458PW;
info->Reset = M458Reset;
info->Power = M458Power;
AddExState(EXPREGS, 2, 0, "EXPR");
void Mapper458_Init (CartInfo *info) {
submapper = info->submapper;
MMC3_init(info, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, writeReg);
info->Power = power;
info->Reset = reset;
AddExState(&reg, 1, 0, "EXPR");
AddExState(&pad, 1, 0, "DIPS");
}