2022-01-06 08:22:18 +01:00
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/* FCEUmm - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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2022-02-17 14:39:06 +08:00
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* Copyright (C) 2022
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2022-01-06 08:22:18 +01:00
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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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/* BS-110 PCB, previously called NC7000M due to a mix-up. */
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#include "mapinc.h"
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#include "mmc3.h"
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static void Mapper391_PRGWrap(uint32 A, uint8 V) {
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int prgAND =EXPREGS[0] &0x08? 0x0F: 0x1F;
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int prgOR =EXPREGS[0] <<4 &0x30;
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if (EXPREGS[0] &0x20) {
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if (~A &0x4000) {
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setprg8(A, (EXPREGS[0] &0x04? ~2: ~0) &V &prgAND | prgOR &~prgAND);
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setprg8(A |0x4000, (EXPREGS[0] &0x04? 2: 0) |V &prgAND | prgOR &~prgAND);
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}
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} else
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setprg8(A, V &prgAND | prgOR &~prgAND);
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}
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static void Mapper391_CHRWrap(uint32 A, uint8 V) {
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int chrAND =EXPREGS[0] &0x40? 0x7F: 0xFF;
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int chrOR =EXPREGS[0] <<3 &0x80 | EXPREGS[1] <<8 &0x100;
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setchr1(A, V &chrAND | chrOR &~chrAND);
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}
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static DECLFW(Mapper391_Write) {
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if (~EXPREGS[0] &0x80) {
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EXPREGS[0] =V;
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EXPREGS[1] =A >>8 &0xFF;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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}
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static void Mapper391_Reset(void) {
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EXPREGS[0] =EXPREGS[1] =0;
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MMC3RegReset();
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}
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static void Mapper391_Power(void) {
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EXPREGS[0] =EXPREGS[1] =0;
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GenMMC3Power();
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SetWriteHandler(0x6000, 0x7FFF, Mapper391_Write);
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}
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void Mapper391_Init(CartInfo *info) {
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GenMMC3_Init(info, 256, 256, 0, 0);
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cwrap = Mapper391_CHRWrap;
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pwrap = Mapper391_PRGWrap;
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info->Power = Mapper391_Power;
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info->Reset = Mapper391_Reset;
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AddExState(EXPREGS, 2, 0, "EXPR");
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}
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