69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 uint32 FTVal, FTValR;
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static char side;
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static uint8 FP_FASTAPASS(2) FT_Read(int w, uint8 ret) {
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if (w) {
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ret |= FTValR;
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}
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return(ret);
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}
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static void FP_FASTAPASS(1) FT_Write(uint8 V) {
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FTValR = 0;
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if (!(V & 0x1))
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FTValR = (FTVal >> 8);
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else if (!(V & 0x2))
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FTValR = (FTVal >> 4);
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else if (!(V & 0x4))
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FTValR = FTVal;
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FTValR = (~FTValR) & 0xF;
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if (side == 'B')
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FTValR = ((FTValR & 0x8) >> 3) | ((FTValR & 0x4) >> 1) | ((FTValR & 0x2) << 1) | ((FTValR & 0x1) << 3);
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FTValR <<= 1;
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}
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static void FP_FASTAPASS(2) FT_Update(void *data, int arg) {
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FTVal = *(uint32*)data;
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}
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static INPUTCFC FamilyTrainer = { FT_Read, FT_Write, 0, FT_Update, 0, 0 };
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INPUTCFC *FCEU_InitFamilyTrainerA(void) {
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side = 'A';
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FTVal = FTValR = 0;
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return(&FamilyTrainer);
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}
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INPUTCFC *FCEU_InitFamilyTrainerB(void) {
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side = 'B';
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FTVal = FTValR = 0;
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return(&FamilyTrainer);
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}
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