mirror of
https://github.com/dborth/fceugx.git
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117 lines
2.7 KiB
C++
117 lines
2.7 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) 2008 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// T-227-1, 820632, MMC3 based, multimenu, 60000in1 (0010) dip switches
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#include "mapinc.h"
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#include "mmc3.h"
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static uint8 reset_flag = 0x07;
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static void BMCT2271CW(uint32 A, uint8 V)
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{
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uint32 va = V;
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if(EXPREGS[0]&0x20)
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{
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va|=0x200;
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va|=(EXPREGS[0]&0x10)<<4;
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}
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else
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{
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va&=0x7F;
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va|=(EXPREGS[0]&0x18)<<4;
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}
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setchr1(A,va);
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}
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static void BMCT2271PW(uint32 A, uint8 V)
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{
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uint32 va = V & 0x3F;
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if(EXPREGS[0]&0x20)
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{
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va&=0x1F;
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va|=0x40;
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va|=(EXPREGS[0]&0x10)<<1;
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}
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else
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{
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va&=0x0F;
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va|=(EXPREGS[0]&0x18)<<1;
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}
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switch(EXPREGS[0]&3)
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{
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case 0x00: setprg8(A,va); break;
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case 0x02:
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{
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va=(va&0xFD)|((EXPREGS[0]&4)>>1);
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if(A<0xC000)
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{
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setprg16(0x8000,va >> 1);
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setprg16(0xC000,va >> 1);
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}
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break;
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}
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case 0x01:
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case 0x03: if(A<0xC000) setprg32(0x8000,va >> 2); break;
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}
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}
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static DECLFW(BMCT2271LoWrite)
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{
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if(!(EXPREGS[0]&0x80))
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EXPREGS[0] = A & 0xFF;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static DECLFR(BMCT2271HiRead)
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{
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uint32 av = A;
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if(EXPREGS[0]&0x40) av = (av & 0xFFF0)|reset_flag;
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return CartBR(av);
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}
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static void BMCT2271Reset(void)
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{
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EXPREGS[0] = 0x00;
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reset_flag++;
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reset_flag&=0x0F;
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MMC3RegReset();
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}
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static void BMCT2271Power(void)
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{
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EXPREGS[0] = 0x00;
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GenMMC3Power();
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SetWriteHandler(0x6000,0x7FFF,BMCT2271LoWrite);
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SetReadHandler(0x8000,0xFFFF,BMCT2271HiRead);
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}
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void BMCT2271_Init(CartInfo *info)
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{
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GenMMC3_Init(info, 128, 128, 8, 0);
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pwrap=BMCT2271PW;
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cwrap=BMCT2271CW;
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info->Power=BMCT2271Power;
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info->Reset=BMCT2271Reset;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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