/* FCE Ultra - NES/Famicom Emulator * * Copyright notice for this file: * Copyright (C) 2007 CaH4e3 * Copyright (C) 2012 FCEUX team * * 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 */ #include "mapinc.h" extern uint32 ROM_size; static uint8 prg[4], chr, sbw, we_sram; static uint8 *WRAM = NULL; static uint32 WRAMSIZE; static SFORMAT StateRegs[]= { {prg, 4, "PRG"}, {&chr, 1, "CHR"}, {&sbw, 1, "SBW"}, {0} }; static void Sync(void) { setprg8r(0x10,0x6000,0); setprg8(0x8000,prg[0]); setprg8(0xA000,prg[1]); setprg8(0xC000,prg[2]); setprg8(0xE000,prg[3]); setchr8(chr); } static DECLFW(M176Write_5001) { if(sbw) { prg[0] = V*4; prg[1] = V*4+1; prg[2] = V*4+2; prg[3] = V*4+3; } Sync(); } static DECLFW(M176Write_5010) { if(V == 0x24) sbw = 1; Sync(); } static DECLFW(M176Write_5011) { V >>= 1; if(sbw) { prg[0] = V*4; prg[1] = V*4+1; prg[2] = V*4+2; prg[3] = V*4+3; } Sync(); } static DECLFW(M176Write_5FF1) { V >>= 1; prg[0] = V*4; prg[1] = V*4+1; prg[2] = V*4+2; prg[3] = V*4+3; Sync(); } static DECLFW(M176Write_5FF2) { chr = V; Sync(); } static DECLFW(M176Write_A001) { we_sram = V & 0x03; } static DECLFW(M176Write_WriteSRAM) { // if(we_sram) CartBW(A,V); } static void M176Power(void) { SetReadHandler(0x6000,0x7fff,CartBR); SetWriteHandler(0x6000,0x7fff,M176Write_WriteSRAM); SetReadHandler(0x8000,0xFFFF,CartBR); SetWriteHandler(0xA001,0xA001,M176Write_A001); SetWriteHandler(0x5001,0x5001,M176Write_5001); SetWriteHandler(0x5010,0x5010,M176Write_5010); SetWriteHandler(0x5011,0x5011,M176Write_5011); SetWriteHandler(0x5ff1,0x5ff1,M176Write_5FF1); SetWriteHandler(0x5ff2,0x5ff2,M176Write_5FF2); we_sram = 0; sbw = 0; prg[0] = 0; prg[1] = 1; prg[2] = (ROM_size-2)&63; prg[3] = (ROM_size-1)&63; Sync(); } static void M176Close(void) { if(WRAM) FCEU_gfree(WRAM); WRAM = NULL; } static void StateRestore(int version) { Sync(); } void Mapper176_Init(CartInfo *info) { info->Power=M176Power; info->Close=M176Close; GameStateRestore=StateRestore; WRAMSIZE=8192; WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE); SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1); AddExState(WRAM, WRAMSIZE, 0, "WRAM"); AddExState(&StateRegs, ~0, 0, 0); }