77 lines
1.9 KiB
C++
77 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) 2017 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 bios_prg, rom_prg, rom_mode, mirror;
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static SFORMAT StateRegs[] =
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{
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{ &bios_prg, 1, "BREG" },
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{ &rom_prg, 1, "RREG" },
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{ &rom_mode, 1, "RMODE" },
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{ 0 }
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};
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static void Sync(void) {
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setchr8(0);
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if(rom_mode&2) {
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setprg16r(0,0x8000,(bios_prg&0xF)|(rom_prg&0x70));
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} else {
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setprg16r(1,0x8000,bios_prg&3);
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}
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setprg16r(0,0xC000,rom_prg&0x7F);
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setmirror(((bios_prg>>4)&1)^1);
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}
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static DECLFW(BMC80013BWrite) {
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uint8 reg = (A>>13)&3;
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if(reg == 0) {
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bios_prg = V;
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} else {
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rom_prg = V;
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rom_mode = reg;
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}
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Sync();
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}
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static void BMC80013BPower(void) {
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bios_prg=rom_prg=rom_mode=mirror=0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, BMC80013BWrite);
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}
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static void BMC80013BReset(void) {
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bios_prg=rom_prg=rom_mode=mirror=0;
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Sync();
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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 BMC80013B_Init(CartInfo *info) {
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info->Reset = BMC80013BReset;
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info->Power = BMC80013BPower;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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