68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* 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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* Copyright (C) 2002 Xodnizel
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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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/* S-009. UNROM plus outer bank register at $6000-$7FFF. */
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#include "mapinc.h"
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static uint16 latch;
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static void Mapper434_Sync(void) {
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setprg16(0x8000, latch);
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setprg16(0xC000, latch |7);
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setchr8(0);
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setmirror(latch >>8 &1);
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}
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static DECLFW(Mapper434_WriteOuterBank) {
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latch =latch &7 | V <<3;
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Mapper434_Sync();
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}
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static DECLFW(Mapper434_WriteInnerBank) {
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latch =latch &~7 | V &CartBR(A) &7;
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Mapper434_Sync();
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}
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static void Mapper434_Reset(void) {
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latch =0;
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Mapper434_Sync();
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}
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static void Mapper434_Power(void) {
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latch =0;
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Mapper434_Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x6000, 0x7FFF, Mapper434_WriteOuterBank);
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SetWriteHandler(0x8000, 0xFFFF, Mapper434_WriteInnerBank);
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}
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static void StateRestore(int version) {
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Mapper434_Sync();
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}
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void Mapper434_Init(CartInfo *info) {
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info->Reset = Mapper434_Reset;
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info->Power = Mapper434_Power;
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GameStateRestore = StateRestore;
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AddExState(&latch, 2, 0, "LATC");
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}
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