mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
130 lines
4.1 KiB
C++
130 lines
4.1 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) 2007-2008 Mad Dumper, 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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* Panda prince pirate.
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* MK4, MK6, A9711/A9713 board
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* 6035052 seems to be the same too, but with prot array in reverse
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* A9746 seems to be the same too, check
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* 187 seems to be the same too, check (A98402 board)
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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 Sync() {
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switch (EXPREGS[5] & 0x3F) {
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case 0x20: EXPREGS[7] = 1; EXPREGS[0] = EXPREGS[6]; break;
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case 0x29: EXPREGS[7] = 1; EXPREGS[0] = EXPREGS[6]; break;
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case 0x26: EXPREGS[7] = 0; EXPREGS[0] = EXPREGS[6]; break;
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case 0x2B: EXPREGS[7] = 1; EXPREGS[0] = EXPREGS[6]; break;
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case 0x2C: EXPREGS[7] = 1; if (EXPREGS[6]) EXPREGS[0] = EXPREGS[6]; break;
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case 0x3C:
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case 0x3F: EXPREGS[7] = 1; EXPREGS[0] = EXPREGS[6]; break;
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case 0x28: EXPREGS[7] = 0; EXPREGS[1] = EXPREGS[6]; break;
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case 0x2A: EXPREGS[7] = 0; EXPREGS[2] = EXPREGS[6]; break;
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case 0x2F: break;
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default: EXPREGS[5] = 0; break;
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}
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}
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static void M121CW(uint32 A, uint8 V) {
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if (PRGsize[0] == CHRsize[0]) { // A9713 multigame extension hack!
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setchr1(A, V | ((EXPREGS[3] & 0x80) << 1));
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} else {
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if ((A & 0x1000) == ((MMC3_cmd & 0x80) << 5))
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setchr1(A, V | 0x100);
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else
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setchr1(A, V);
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}
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}
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static void M121PW(uint32 A, uint8 V) {
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if (EXPREGS[5] & 0x3F) {
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// FCEU_printf("prot banks: %02x %02x %02x %02x\n",V,EXPREGS[2],EXPREGS[1],EXPREGS[0]);
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setprg8(A, (V & 0x1F) | ((EXPREGS[3] & 0x80) >> 2));
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setprg8(0xE000, (EXPREGS[0]) | ((EXPREGS[3] & 0x80) >> 2));
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setprg8(0xC000, (EXPREGS[1]) | ((EXPREGS[3] & 0x80) >> 2));
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setprg8(0xA000, (EXPREGS[2]) | ((EXPREGS[3] & 0x80) >> 2));
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} else {
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// FCEU_printf("gen banks: %04x %02x\n",A,V);
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setprg8(A, (V & 0x1F) | ((EXPREGS[3] & 0x80) >> 2));
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}
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}
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static DECLFW(M121Write) {
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// FCEU_printf("write: %04x:%04x\n",A&0xE003,V);
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switch (A & 0xE003) {
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case 0x8000:
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// EXPREGS[5] = 0;
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// FCEU_printf("gen: %02x\n",V);
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MMC3_CMDWrite(A, V);
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FixMMC3PRG(MMC3_cmd);
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break;
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case 0x8001:
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EXPREGS[6] = ((V & 1) << 5) | ((V & 2) << 3) | ((V & 4) << 1) | ((V & 8) >> 1) | ((V & 0x10) >> 3) | ((V & 0x20) >> 5);
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// FCEU_printf("bank: %02x (%02x)\n",V,EXPREGS[6]);
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if (!EXPREGS[7]) Sync();
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MMC3_CMDWrite(A, V);
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FixMMC3PRG(MMC3_cmd);
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break;
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case 0x8003:
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EXPREGS[5] = V;
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// EXPREGS[7] = 0;
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// FCEU_printf("prot: %02x\n",EXPREGS[5]);
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Sync();
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MMC3_CMDWrite(0x8000, V);
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FixMMC3PRG(MMC3_cmd);
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break;
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}
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}
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static uint8 prot_array[16] = { 0x83, 0x83, 0x42, 0x00 };
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static DECLFW(M121LoWrite) {
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EXPREGS[4] = prot_array[V & 3]; // 0x100 bit in address seems to be switch arrays 0, 2, 2, 3 (Contra Fighter)
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if ((A & 0x5180) == 0x5180) { // A9713 multigame extension
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EXPREGS[3] = V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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// FCEU_printf("write: %04x:%04x\n",A,V);
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}
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static DECLFR(M121Read) {
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// FCEU_printf("read: %04x->\n",A,EXPREGS[0]);
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return EXPREGS[4];
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}
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static void M121Power(void) {
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EXPREGS[3] = 0x80;
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EXPREGS[5] = 0;
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GenMMC3Power();
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SetReadHandler(0x5000, 0x5FFF, M121Read);
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SetWriteHandler(0x5000, 0x5FFF, M121LoWrite);
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SetWriteHandler(0x8000, 0x9FFF, M121Write);
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}
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void Mapper121_Init(CartInfo *info) {
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GenMMC3_Init(info, 128, 256, 8, 0);
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pwrap = M121PW;
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cwrap = M121CW;
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info->Power = M121Power;
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AddExState(EXPREGS, 8, 0, "EXPR");
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}
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