fceux/input/ftrainer.c

75 lines
1.7 KiB
C

/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2003 Xodnizel
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "share.h"
static uint32 FTVal,FTValR;
static char side;
static uint8 FP_FASTAPASS(2) FT_Read(int w, uint8 ret)
{
if(w)
{
ret|=FTValR;
}
return(ret);
}
static void FP_FASTAPASS(1) FT_Write(uint8 V)
{
FTValR=0;
//printf("%08x\n",FTVal);
if(!(V&0x1))
FTValR=(FTVal>>8);
else if(!(V&0x2))
FTValR=(FTVal>>4);
else if(!(V&0x4))
FTValR=FTVal;
FTValR=(~FTValR)&0xF;
if(side=='B')
FTValR=((FTValR&0x8)>>3) | ((FTValR&0x4)>>1) | ((FTValR&0x2)<<1) | ((FTValR&0x1)<<3);
FTValR<<=1;
}
static void FP_FASTAPASS(2) FT_Update(void *data, int arg)
{
FTVal=*(uint32 *)data;
}
static INPUTCFC FamilyTrainer={FT_Read,FT_Write,0,FT_Update,0,0};
INPUTCFC *FCEU_InitFamilyTrainerA(void)
{
side='A';
FTVal=FTValR=0;
return(&FamilyTrainer);
}
INPUTCFC *FCEU_InitFamilyTrainerB(void)
{
side='B';
FTVal=FTValR=0;
return(&FamilyTrainer);
}