85 lines
2.0 KiB
C
85 lines
2.0 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 negativeExponent
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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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/* Mapper 389 - Caltron 9-in-1 multicart */
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#include "mapinc.h"
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static uint8 regs[3];
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static SFORMAT StateRegs[] = {
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{ ®s, 3, "REGS" },
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{ 0 }
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};
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static void Sync(void)
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{
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if (regs[1] & 0x02)
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{
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/* UNROM-064 */
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setprg16(0x8000, (regs[0] >> 2) | ((regs[2] >> 2) & 0x03));
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setprg16(0xC000, (regs[0] >> 2) | 0x03);
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}
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else
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{
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/* NROM-256 */
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setprg32(0x8000, regs[0] >> 3);
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}
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setchr8(((regs[1] >> 1) & 0x1C) | (regs[2] & 0x03));
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setmirror((regs[0] & 0x01) ^ 1);
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}
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static DECLFW(M389Write)
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{
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switch (A & 0xF000)
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{
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case 0x8000: regs[0] = (A & 0xFF); Sync(); break;
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case 0x9000: regs[1] = (A & 0xFF); Sync(); break;
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default: regs[2] = (A & 0xFF); Sync(); break;
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}
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}
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static void M389Reset(void)
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{
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regs[0] = regs[1] = regs[2] = 0;
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Sync();
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}
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static void M389Power(void)
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{
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regs[0] = regs[1] = regs[2] = 0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, M389Write);
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}
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static void StateRestore(int version)
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{
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Sync();
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}
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void Mapper389_Init(CartInfo *info)
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{
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info->Power = M389Power;
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info->Reset = M389Reset;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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