64 lines
1.6 KiB
C
64 lines
1.6 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 reg[4];
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static void sync () {
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int prg = reg[3] <<3 | reg[1] &0x07;
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if (reg[3] &0x08)
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setprg32(0x8000, prg >>1);
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else {
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setprg16(0x8000, prg);
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setprg16(0xC000, prg |7);
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}
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setchr4(0x0000, reg[3] <<5 | reg[1] >>3 &0x1F);
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setchr4(0x1000, reg[3] <<5 | reg[2] >>3 &0x1F);
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setmirror(reg[3] &0x04? MI_H: MI_V);
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}
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static DECLFW (writeReg) {
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reg[A >>13 &3] = V;
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sync();
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}
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static void reset () {
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reg[0] = reg[1] = reg[2] = reg[3] = 0;
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sync();
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}
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static void power () {
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SetReadHandler(0x6000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, writeReg);
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reset();
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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 Mapper598_Init (CartInfo *info) {
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info->Power = power;
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info->Reset = reset;
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GameStateRestore = stateRestore;
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AddExState(reg, 4, 0, "REGS");
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}
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