mirror of
https://github.com/dborth/fceugx.git
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76 lines
1.8 KiB
C++
76 lines
1.8 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) 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 latche;
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static uint8 *CHRRAM=NULL;
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static uint32 CHRRAMSIZE;
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static SFORMAT StateRegs[] =
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{
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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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setprg32(0x8000, latche & 7);
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setchr2(0x0000, latche >> 4);
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setchr2r(0x10, 0x0800, 2);
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setchr4r(0x10, 0x1000, 0);
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}
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static DECLFW(M77Write) {
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latche = V;
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Sync();
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}
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static void M77Power(void) {
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latche = 0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, M77Write);
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}
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static void M77Close(void)
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{
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if (CHRRAM)
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FCEU_gfree(CHRRAM);
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CHRRAM = 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 Mapper77_Init(CartInfo *info) {
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info->Power = M77Power;
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info->Close = M77Close;
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GameStateRestore = StateRestore;
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CHRRAMSIZE = 6 * 1024;
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CHRRAM = (uint8*)FCEU_gmalloc(CHRRAMSIZE);
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SetupCartCHRMapping(0x10, CHRRAM, CHRRAMSIZE, 1);
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AddExState(CHRRAM, CHRRAMSIZE, 0, "CRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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