mirror of
https://github.com/dborth/fceugx.git
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79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
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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) 2005 CaH4e3
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* Copyright (C) 2009 qeed
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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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* 22 + Contra Reset based custom mapper...
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*
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*/
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#include "mapinc.h"
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static uint8 latche, reset;
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static SFORMAT StateRegs[] =
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{
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{ &reset, 1, "RST" },
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{ &latche, 1, "LATC" },
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{ 0 }
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};
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static void Sync(void) {
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if(reset) {
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setprg16(0x8000, latche & 7);
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setprg16(0xC000, 7);
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setmirror(MI_V);
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} else {
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uint32 bank = (latche & 0x1F) + 8;
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if (latche & 0x20) {
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setprg16(0x8000, bank);
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setprg16(0xC000, bank);
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} else
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setprg32(0x8000, bank >> 1);
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setmirror((latche >> 6) & 1);
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}
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setchr8(0);
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}
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static DECLFW(M230Write) {
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latche = V;
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Sync();
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}
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static void M230Reset(void) {
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reset ^= 1;
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Sync();
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}
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static void M230Power(void) {
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latche = reset = 0;
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Sync();
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SetWriteHandler(0x8000, 0xFFFF, M230Write);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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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 Mapper230_Init(CartInfo *info) {
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info->Power = M230Power;
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info->Reset = M230Reset;
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AddExState(&StateRegs, ~0, 0, 0);
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GameStateRestore = StateRestore;
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}
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