65 lines
1.6 KiB
C
65 lines
1.6 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) 2025 NewRisingSun
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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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*/
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#include "mapinc.h"
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#include "latch.h"
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static uint8 reg;
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static SFORMAT StateRegs[] = {
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{ ®, 1, "REG " },
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{ 0 }
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};
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static void Sync(void) {
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if (latch.data &0x20) {
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setprg16(0x8000, latch.data &0x1F | reg <<5);
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setprg16(0xC000, latch.data &0x1F | reg <<5);
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} else
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setprg32(0x8000, latch.data >>1 &0x0F | reg <<4);
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setchr8(0);
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setmirror(latch.data &0x80? (latch.data &0x40? MI_1: MI_H): (latch.data &0x40? MI_V: MI_0));
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}
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static DECLFW(writeReg) {
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reg =V;
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Sync();
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}
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static void Power() {
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reg =0;
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LatchPower();
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SetWriteHandler(0x5000, 0x5FFF, writeReg);
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}
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static void Reset() {
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reg =0;
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latch.data =0;
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Sync();
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}
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void Mapper485_Init(CartInfo *info) {
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Latch_Init(info, Sync, NULL, 0, 0);
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info->Power = Power;
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info->Reset = Reset;
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AddExState(StateRegs, ~0, 0, NULL);
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}
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