58 lines
1.7 KiB
C
58 lines
1.7 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) 2023
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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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/* NES 2.0 Mapper 453 - Realtec 8042
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* 3-in-1 1995 World Competitive Champion Edition (DG-002)
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*/
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#include "mapinc.h"
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#include "latch.h"
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static void Sync(void) {
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setchr8(0);
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if (latch.data & 0x40) {
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setprg32(0x8000, ((latch.data >> 3) & 0x18) | (latch.data & 7));
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} else {
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setprg16(0x8000, (((latch.data >> 2) & 0x38) | latch.data & 7));
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setprg16(0xC000, (latch.data >> 2 & 0x38) | 7);
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}
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setmirror(((latch.data >> 5) & 2) + (((latch.data >> 4) & 1) ^ 1));
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}
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static DECLFW(M453WriteLatch) {
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if (latch.data & 0xE0)
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latch.data = (latch.data & 0xE0) | (V & ~0xE0);
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else
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latch.data = V;
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Sync();
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}
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static void M453Power(void) {
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LatchPower();
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SetWriteHandler(0x8000, 0xFFFF, M453WriteLatch);
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}
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void Mapper453_Init(CartInfo *info) {
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Latch_Init(info, Sync, NULL, 0, 0);
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info->Power = M453Power;
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info->Reset = LatchHardReset;
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}
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