/* FCEUmm - NES/Famicom Emulator * * Copyright notice for this file: * Copyright (C) 2022 * * 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" static uint16 latchAddr; static uint8 latchData; static uint8 submapper; static SFORMAT StateRegs[] = { { &latchAddr, 2, "ADDR" }, { &latchData, 1, "DATA" }, { 0 } }; static void Mapper354_Sync(void) { int prg = latchData & 0x3F | latchAddr << 2 & 0x40 | latchAddr >> 5 & 0x80; switch (latchAddr & 7) { case 0: case 4: setprg32(0x8000, prg >> 1); break; case 1: setprg16(0x8000, prg); setprg16(0xC000, prg | 7); break; case 2: case 6: setprg8(0x8000, prg << 1 | latchData >> 7); setprg8(0xA000, prg << 1 | latchData >> 7); setprg8(0xC000, prg << 1 | latchData >> 7); setprg8(0xE000, prg << 1 | latchData >> 7); break; case 3: case 7: setprg16(0x8000, prg); setprg16(0xC000, prg); break; case 5: setprg8(0x6000, prg << 1 | latchData >> 7); setprg32(0x8000, prg >> 1 | 3); break; } SetupCartCHRMapping(0, CHRptr[0], CHRsize[0], (latchAddr & 8) ? 0 : 1); setchr8(0); setmirror(latchData & 0x40 ? MI_H : MI_V); } static DECLFW(Mapper354_WriteLatch) { latchData = V; latchAddr = A & 0xFFFF; Mapper354_Sync(); } static void Mapper354_Reset(void) { latchAddr = latchData = 0; Mapper354_Sync(); } static void Mapper354_Power(void) { latchAddr = latchData = 0; SetReadHandler(0x6000, 0xFFFF, CartBR); SetWriteHandler(submapper == 1 ? 0xE000 : 0xF000, 0xFFFF, Mapper354_WriteLatch); Mapper354_Sync(); } static void StateRestore(int version) { Mapper354_Sync(); } void Mapper354_Init(CartInfo *info) { submapper = info->submapper; info->Power = Mapper354_Power; info->Reset = Mapper354_Reset; GameStateRestore = StateRestore; AddExState(StateRegs, ~0, 0, 0); }