68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* FCEUmm - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2020
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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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*/
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/* The UNIF dump of "(JY-103) 3-in-1" (JY4M4 MAPR) has a strange bank order and will not run with this emulation. */
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#include "mapinc.h"
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#include "asic_mmc3.h"
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static uint8 reg[2];
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static void sync () {
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int prg = reg[0] &0x1F | reg[0] >>1 &0x20;
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if (reg[0] &0x80)
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MMC3_syncPRG(0x0F, prg <<2);
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else
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if (reg[0] &0x20)
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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);
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}
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setchr8(0);
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MMC3_syncMirror();
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}
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static DECLFW (writeReg) {
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reg[A &1] = V;
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sync();
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}
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static void reset () {
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reg[0] = 0x60;
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reg[1] = 0x00;
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MMC3_clear();
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}
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static void power () {
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reg[0] = 0x60;
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reg[1] = 0x00;
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MMC3_power();
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}
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void Mapper536_Init (CartInfo *info) {
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MMC3_init(info, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, writeReg);
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info->Power = power;
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info->Reset = reset;
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AddExState(reg, 2, 0, "EXPR");
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}
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