mirror of
https://github.com/dborth/fceugx.git
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84 lines
2.1 KiB
C++
84 lines
2.1 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) 2015 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 uint16 addrlatch;
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static uint8 datalatch, hw_mode;
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static SFORMAT StateRegs[] =
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{
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{ &addrlatch, 2, "ADRL" },
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{ &datalatch, 1, "DATL" },
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{ &hw_mode, 1, "HWMO" },
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{ 0 }
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};
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static void Sync(void) {
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uint8 prg = (addrlatch & 7);
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setchr8(datalatch);
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if(addrlatch & 0x80) {
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setprg16(0x8000,prg);
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setprg16(0xC000,prg);
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} else {
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setprg32(0x8000,prg >> 1);
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}
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setmirror(MI_V);
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}
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static DECLFW(EH8813AWrite) {
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if((addrlatch & 0x100) == 0) {
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addrlatch = A & 0x1FF;
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datalatch = V & 0xF;
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}
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Sync();
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}
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static DECLFR(EH8813ARead) {
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if (addrlatch & 0x40)
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A= (A & 0xFFF0) + hw_mode;
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return CartBR(A);
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}
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static void EH8813APower(void) {
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addrlatch = datalatch = hw_mode = 0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, EH8813ARead);
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SetWriteHandler(0x8000, 0xFFFF, EH8813AWrite);
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}
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static void EH8813AReset(void) {
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addrlatch = datalatch = 0;
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hw_mode = (hw_mode + 1) & 0xF;
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FCEU_printf("Hardware Switch is %01X\n", hw_mode);
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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 UNLEH8813A_Init(CartInfo *info) {
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info->Reset = EH8813AReset;
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info->Power = EH8813APower;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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