65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
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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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* Copyright (C) 2020 negativeExponent
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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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#include "mapinc.h"
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#include "mmc3.h"
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static void M432CW(uint32 A, uint8 V) {
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if (EXPREGS[0] & 4)
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setchr1(A, (V & 0x7F) | ((EXPREGS[0] << 7) & 0x80) | ((EXPREGS[0] << 5) & 0x100));
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else
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setchr1(A, V | ((EXPREGS[0] << 5) & 0x100));
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}
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static void M432PW(uint32 A, uint8 V) {
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if (EXPREGS[0] & 4)
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setprg8(A, (V & 0x0F) | ((EXPREGS[0] << 4) & 0x10) | ((EXPREGS[0] << 1) & 0x20));
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else
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setprg8(A, (V & 0x1F) | ((EXPREGS[0] << 1) & 0x20));
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}
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static DECLFW(M432Write) {
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EXPREGS[0] = V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void M432Reset(void) {
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EXPREGS[0] = 0;
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MMC3RegReset();
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}
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static void M432Power(void) {
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EXPREGS[0] = 0;
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GenMMC3Power();
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SetWriteHandler(0x6000, 0x7FFF, M432Write);
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}
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void Mapper432_Init(CartInfo *info) {
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GenMMC3_Init(info, 256, 256, 0, 0);
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cwrap = M432CW;
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pwrap = M432PW;
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info->Power = M432Power;
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info->Reset = M432Reset;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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