57 lines
1.4 KiB
C
57 lines
1.4 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) 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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#include "mapinc.h"
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static uint8 latch;
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static SFORMAT stateRegs[] ={
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{ &latch, 1, "LATC" },
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{ 0 }
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};
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static void sync () {
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setprg32(0x8000, latch);
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setchr8(latch);
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}
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static DECLFW(writeLatch) {
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X6502_IRQEnd(FCEU_IQEXT);
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latch =A &0xFF;
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sync();
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}
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static void power(void) {
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latch =0;
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sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, writeLatch);
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}
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static void pseudoScanline () {
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X6502_IRQBegin(FCEU_IQEXT);
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}
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void Mapper471_Init(CartInfo *info) {
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AddExState(stateRegs, ~0, 0, 0);
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info->Power =power;
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GameHBIRQHook =pseudoScanline;
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}
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