131 lines
3.0 KiB
C
131 lines
3.0 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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/* NES 2.0 Mapper 353 is used for the 92 Super Mario Family multicart,
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* consisting of an MMC3 clone ASIC together with a PAL.
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* The PCB code is 81-03-05-C.
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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static uint8* CHRRAM = NULL;
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static uint32 CHRRAMSIZE;
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static uint8 PPUCHRBus;
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static uint8 MIR[8];
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static void M353PPU(uint32 A) {
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A &= 0x1FFF;
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A >>= 10;
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PPUCHRBus = A;
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if (EXPREGS[0] == 0)
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setmirror(MI_0 + MIR[A]);
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}
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static void M353PW(uint32 A, uint8 V) {
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uint32 bank = V;
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if (EXPREGS[0] == 2) {
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bank &= 0x0F;
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bank |= (DRegBuf[0] & 0x80) ? 0x10 : 0x00;
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bank |= (EXPREGS[0] << 5);
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} else {
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if ((EXPREGS[0] == 3) && !(DRegBuf[0] & 0x80)) {
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switch (A & 0xF000) {
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case 0xC000:
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case 0xE000:
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bank = DRegBuf[6 + ((A >> 13) & 1)] | 0x70;
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break;
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}
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} else {
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bank &= 0x1F;
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bank |= (EXPREGS[0] << 5);
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}
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}
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setprg8(A, bank);
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}
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static void M353CW(uint32 A, uint8 V) {
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if ((EXPREGS[0] == 2) && (DRegBuf[0] & 0x80))
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setchr8r(0x10, 0);
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else
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setchr1(A, (V & 0x7F) | ((EXPREGS[0]) << 7));
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MIR[A >> 10] = V >> 7;
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if ((EXPREGS[0] == 0) && (PPUCHRBus == (A >> 10)))
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setmirror(MI_0 + (V >> 7));
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}
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static void M353MW(uint8 V) {
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if (EXPREGS[0] != 0) {
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A000B = V;
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setmirror((V & 1) ^ 1);
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}
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}
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static DECLFW(M353Write) {
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if (A & 0x80) {
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EXPREGS[0] = (A >> 13) & 0x03;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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} else {
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if (A < 0xC000) {
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MMC3_CMDWrite(A, V);
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FixMMC3PRG(MMC3_cmd);
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} else
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MMC3_IRQWrite(A, V);
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}
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}
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static void M353Power(void) {
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EXPREGS[0] = 0;
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GenMMC3Power();
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SetWriteHandler(0x8000, 0xFFFF, M353Write);
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}
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static void M353Reset(void) {
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EXPREGS[0] = 0;
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MMC3RegReset();
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}
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static void M353Close(void) {
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if (CHRRAM)
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FCEU_gfree(CHRRAM);
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CHRRAM = NULL;
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}
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void Mapper353_Init(CartInfo* info) {
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GenMMC3_Init(info, 256, 128, 8, info->battery);
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cwrap = M353CW;
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pwrap = M353PW;
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mwrap = M353MW;
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PPU_hook = M353PPU;
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info->Power = M353Power;
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info->Close = M353Close;
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info->Reset = M353Reset;
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AddExState(EXPREGS, 1, 0, "EXPR");
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CHRRAMSIZE = 8192;
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CHRRAM = (uint8*)FCEU_gmalloc(CHRRAMSIZE);
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SetupCartCHRMapping(0x10, CHRRAM, CHRRAMSIZE, 1);
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AddExState(CHRRAM, CHRRAMSIZE, 0, "CHRR");
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}
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