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https://github.com/dborth/fceugx.git
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72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2015 CaH4e3
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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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* "Blood Of Jurassic" protected MMC3 based board (GD-98 Cart ID, 158B PCB ID)
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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 uint8 lut[8] = { 0x00, 0x00, 0x00, 0x01, 0x02, 0x04, 0x0F, 0x00 };
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static void UNL158BPW(uint32 A, uint8 V) {
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if (EXPREGS[0] & 0x80) {
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uint32 bank = EXPREGS[0] & 7;
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if(EXPREGS[0] & 0x20) { // 32Kb mode
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setprg32(0x8000, bank >> 1);
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} else { // 16Kb mode
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setprg16(0x8000, bank);
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setprg16(0xC000, bank);
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}
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} else {
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setprg8(A, V & 0xF);
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}
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}
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static DECLFW(UNL158BProtWrite) {
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EXPREGS[A & 7] = V;
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switch(A & 7) {
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case 0:
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FixMMC3PRG(MMC3_cmd);
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break;
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case 7:
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FCEU_printf("UNK PROT WRITE\n");
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break;
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}
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}
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static DECLFR(UNL158BProtRead) {
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return X.DB | lut[A & 7];
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}
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static void UNL158BPower(void) {
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GenMMC3Power();
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SetWriteHandler(0x5000, 0x5FFF, UNL158BProtWrite);
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SetReadHandler(0x5000, 0x5FFF, UNL158BProtRead);
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}
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void UNL158B_Init(CartInfo *info) {
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GenMMC3_Init(info, 128, 128, 0, 0);
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pwrap = UNL158BPW;
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info->Power = UNL158BPower;
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AddExState(EXPREGS, 8, 0, "EXPR");
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}
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