mirror of
https://github.com/dborth/fceugx.git
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96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2005 CaH4e3
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Family Study Box by Fukutake Shoten
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*/
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#include "mapinc.h"
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static uint8 SWRAM[3072];
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static uint8 *WRAM = NULL;
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static uint8 regs[4];
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static SFORMAT StateRegs[] =
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{
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{ regs, 4, "DREG" },
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{ SWRAM, 3072, "SWRM" },
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{ 0 }
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};
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static void Sync(void) {
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setprg8r(0x10, 0x6000, regs[0] >> 6);
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setprg16(0x8000, regs[1]);
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setprg16(0xc000, 0);
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}
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static DECLFW(M186Write) {
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if (A & 0x4203) regs[A & 3] = V;
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Sync();
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}
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static DECLFR(M186Read) {
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switch (A) {
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case 0x4200: return 0x00; break;
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case 0x4201: return 0x00; break;
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case 0x4202: return 0x40; break;
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case 0x4203: return 0x00; break;
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}
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return 0xFF;
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}
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static DECLFR(ASWRAM) {
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return(SWRAM[A - 0x4400]);
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}
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static DECLFW(BSWRAM) {
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SWRAM[A - 0x4400] = V;
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}
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static void M186Power(void) {
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setchr8(0);
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SetReadHandler(0x6000, 0xFFFF, CartBR);
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SetWriteHandler(0x6000, 0xFFFF, CartBW);
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SetReadHandler(0x4200, 0x43FF, M186Read);
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SetWriteHandler(0x4200, 0x43FF, M186Write);
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SetReadHandler(0x4400, 0x4FFF, ASWRAM);
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SetWriteHandler(0x4400, 0x4FFF, BSWRAM);
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FCEU_CheatAddRAM(32, 0x6000, WRAM);
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regs[0] = regs[1] = regs[2] = regs[3];
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Sync();
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}
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static void M186Close(void) {
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if (WRAM)
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FCEU_gfree(WRAM);
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WRAM = NULL;
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}
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static void M186Restore(int version) {
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Sync();
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}
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void Mapper186_Init(CartInfo *info) {
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info->Power = M186Power;
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info->Close = M186Close;
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GameStateRestore = M186Restore;
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WRAM = (uint8*)FCEU_gmalloc(32768);
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SetupCartPRGMapping(0x10, WRAM, 32768, 1);
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AddExState(WRAM, 32768, 0, "WRAM");
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AddExState(StateRegs, ~0, 0, 0);
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}
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