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https://github.com/dborth/fceugx.git
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71 lines
1.9 KiB
C++
71 lines
1.9 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) 2009 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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* 7-in-1 Darkwing Duck, Snake, MagicBlock (PCB marked as "12 in 1")
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*/
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#include "mapinc.h"
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static uint8 reg[4];
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static SFORMAT StateRegs[] =
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{
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{ reg, 4, "REGS" },
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{ 0 }
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};
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static void Sync(void) {
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uint8 bank = (reg[3] & 3) << 3;
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setchr4(0x0000, (reg[1] >> 3) | (bank << 2));
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setchr4(0x1000, (reg[2] >> 3) | (bank << 2));
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if (reg[3] & 8) {
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setprg32(0x8000, ((reg[2] & 7) >> 1) | bank);
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} else {
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setprg16(0x8000, (reg[1] & 7) | bank);
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setprg16(0xc000, 7 | bank);
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}
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setmirror(((reg[3] & 4) >> 2) ^ 1);
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}
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static DECLFW(BMC12IN1Write) {
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switch (A) {
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case 0xafff: reg[0] = V; break;
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case 0xbfff: reg[1] = V; break;
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case 0xdfff: reg[2] = V; break;
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case 0xefff: reg[3] = V; break;
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}
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Sync();
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}
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static void BMC12IN1Power(void) {
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reg[0] = reg[1] = reg[2] = reg[3] = 0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, BMC12IN1Write);
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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 BMC12IN1_Init(CartInfo *info) {
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info->Power = BMC12IN1Power;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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