2012-10-28 17:37:53 +00:00
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/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2012 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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#include "mapinc.h"
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static uint8 regs[8];
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2012-12-31 08:47:09 +00:00
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static uint8 *WRAM = NULL;
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2012-10-28 17:37:53 +00:00
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static uint32 WRAMSIZE;
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static SFORMAT StateRegs[] =
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{
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{ regs, 8, "REGS" },
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{ 0 }
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};
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static void Sync(void) {
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setprg2r(0x10, 0x6800, 0);
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setprg8(0x8000, regs[0]);
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setprg8(0xA000, regs[1]);
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setprg8(0xC000, regs[2]);
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setprg8(0xE000, regs[3]);
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setchr2(0x0000, regs[4]);
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setchr2(0x0800, regs[5]);
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setchr2(0x1000, regs[6]);
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setchr2(0x1800, regs[7]);
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}
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static DECLFW(M246Write) {
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regs[A & 7] = V;
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Sync();
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}
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static void M246Power(void) {
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regs[0] = regs[1] = regs[2] = regs[3] = ~0;
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Sync();
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SetWriteHandler(0x6000, 0x67FF, M246Write);
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SetReadHandler(0x6800, 0x6FFF, CartBR);
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SetWriteHandler(0x6800, 0x6FFF, CartBW);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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2014-08-15 16:51:39 +00:00
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FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
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2012-10-28 17:37:53 +00:00
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}
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static void M246Close(void)
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{
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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 StateRestore(int version) {
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Sync();
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}
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void Mapper246_Init(CartInfo *info) {
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info->Power = M246Power;
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info->Close = M246Close;
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GameStateRestore = StateRestore;
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WRAMSIZE = 2048;
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WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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if (info->battery) {
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info->SaveGame[0] = WRAM;
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info->SaveGameLen[0] = WRAMSIZE;
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}
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AddExState(&StateRegs, ~0, 0, 0);
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}
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