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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 /* FCEUmm - NES/Famicom Emulator
* *
* Copyright notice for this file: * Copyright notice for this file:
* Copyright (C) 2023 * Copyright (C) 2020
* *
* This program is free software; you can redistribute it and/or modify * 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 * 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 * You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/ */
#include "mapinc.h" #include "mapinc.h"
#include "mmc3.h" #include "asic_mmc3.h"
static void M458CW(uint32 A, uint8 V) { static uint8 submapper;
setchr1(A, ((EXPREGS[0] << 4) & ~0x7F) | (V & 0x7F)); static uint8 reg;
static uint8 pad;
static DECLFR (readPad) {
return CartBR(A &~0xF | pad &0xF);
} }
static void M458PW(uint32 A, uint8 V) { static void sync () {
if (EXPREGS[0] & 0x10) { if (reg &(submapper == 1? 0x08: 0x10))
setprg32(0x8000, EXPREGS[0] >> 1); setprg32(0x8000, reg >>1);
} else { else {
setprg16(0x8000, EXPREGS[0]); setprg16(0x8000, reg);
setprg16(0xC000, EXPREGS[0]); setprg16(0xC000, reg);
} }
MMC3_syncCHR(0x7F, reg <<4 &~0x7F);
MMC3_syncMirror();
SetReadHandler(0x8000, 0xFFFF, reg &(submapper == 1? 0x80: 0x20)? readPad: CartBR);
} }
static DECLFR(M458Read) { static DECLFW (writeReg) {
if ((EXPREGS[0] & 0x20) && (EXPREGS[1] & 3)) { reg = A &0xFF;
return CartBR((A & ~3) | (EXPREGS[1] & 3)); sync();
}
return CartBR(A);
} }
static DECLFW(M458Write) { static void reset () {
if (MMC3CanWriteToWRAM()) { reg = 0;
EXPREGS[0] = A & 0xFF; pad++;
FixMMC3PRG(MMC3_cmd); MMC3_clear();
FixMMC3CHR(MMC3_cmd);
}
} }
static void M458Reset(void) { static void power () {
EXPREGS[0] = 0; reg = 0;
EXPREGS[1]++; pad = 0;
MMC3RegReset(); MMC3_power();
} }
static void M458Power(void) { void Mapper458_Init (CartInfo *info) {
EXPREGS[0] = 0; submapper = info->submapper;
EXPREGS[1] = 0; MMC3_init(info, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, writeReg);
GenMMC3Power(); info->Power = power;
SetReadHandler(0x8000, 0xFFFF, M458Read); info->Reset = reset;
SetWriteHandler(0x6000, 0x7FFF, M458Write); AddExState(&reg, 1, 0, "EXPR");
} AddExState(&pad, 1, 0, "DIPS");
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");
} }