86 lines
2.1 KiB
C++
86 lines
2.1 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) 2002 Xodnizel
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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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#include <string.h>
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#include <stdlib.h>
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#include "share.h"
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static char side;
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static uint32 pprsb[2];
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static uint32 pprdata[2];
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static uint8 FP_FASTAPASS(1) ReadPP(int w)
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{
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uint8 ret=0;
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ret|=((pprdata[w]>>pprsb[w])&1)<<3;
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ret|=((pprdata[w]>>(pprsb[w]+8))&1)<<4;
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if(pprsb[w]>=4)
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{
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ret|=0x10;
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if(pprsb[w]>=8)
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ret|=0x08;
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}
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if(!fceuindbg)
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pprsb[w]++;
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return ret;
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}
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static void FP_FASTAPASS(1) StrobePP(int w)
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{
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pprsb[w]=0;
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}
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void FP_FASTAPASS(3) UpdatePP(int w, void *data, int arg)
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{
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static const char shifttableA[12]={8,9,0,1,11,7,4,2,10,6,5,3};
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static const char shifttableB[12]={1,0,9,8,2,4,7,11,3,5,6,10};
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int x;
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pprdata[w]=0;
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if(side=='A')
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for(x=0;x<12;x++)
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pprdata[w]|=(((*(uint32 *)data)>>x)&1)<<shifttableA[x];
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else
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for(x=0;x<12;x++)
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pprdata[w]|=(((*(uint32 *)data)>>x)&1)<<shifttableB[x];
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}
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static INPUTC PwrPadCtrl={ReadPP,0,StrobePP,UpdatePP,0,0};
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static INPUTC *FCEU_InitPowerpad(int w)
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{
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pprsb[w]=pprdata[w]=0;
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return(&PwrPadCtrl);
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}
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INPUTC *FCEU_InitPowerpadA(int w)
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{
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side='A';
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return(FCEU_InitPowerpad(w));
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}
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INPUTC *FCEU_InitPowerpadB(int w)
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{
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side='B';
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return(FCEU_InitPowerpad(w));
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}
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