/* FCE Ultra - NES/Famicom Emulator * * Copyright notice for this file: * Copyright (C) 2022 Cluster * * 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 * * NES 2.0 Mapper 470 denotes the INX_007T_V01 multicart circuit board, * used for the Retro-Bit re-release of Battletoads and Double Dragon. * It is basically AOROM with an additional outer bank register at $5000-$5FFF * whose data selects the 256 KiB outer bank. * * $5000-$5FFF * 7 bit 0 * ---- ---- * xxxx xxOO * || * ++- Select outer 256 KB PRG ROM bank for CPU $8000-$FFFF * * $8000-$FFFF * 7 bit 0 * ---- ---- * xxxM xPPP * | ||| * | +++- Select inner 32 KB PRG ROM bank for CPU $8000-$FFFF * +------ Select 1 KB VRAM page for all 4 nametables * */ #include "mapinc.h" static uint8 latch_out, latch_in; static void INX_007T_Sync() { setprg32(0x8000, (latch_in & 0b111) | (latch_out << 3)); setmirror(MI_0 + ((latch_in >> 4) & 1)); setchr8(0); } static void StateRestore(int version) { INX_007T_Sync(); } static DECLFW(INX_007T_WriteLow) { latch_out = V; INX_007T_Sync(); } static DECLFW(INX_007T_WriteHi) { latch_in = V; INX_007T_Sync(); } static void INX_007T_Power(void) { latch_in = latch_out = 0; INX_007T_Sync(); SetReadHandler(0x8000, 0xFFFF, CartBR); SetWriteHandler(0x5000,0x5FFF, INX_007T_WriteLow); SetWriteHandler(0x8000, 0xFFFF, INX_007T_WriteHi); } static void INX_007T_Reset(void) { latch_in = latch_out = 0; INX_007T_Sync(); } void INX_007T_Init(CartInfo *info) { info->Power = INX_007T_Power; info->Reset = INX_007T_Reset; GameStateRestore = StateRestore; SetupCartMirroring(MI_0, 0, NULL); AddExState(&latch_out, 1, 0, "LATO"); AddExState(&latch_in, 1, 0, "LATI"); }