81 lines
2.1 KiB
C
81 lines
2.1 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) 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., 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 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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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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ret |= 0x10;
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if (pprsb[w] >= 8)
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ret |= 0x08;
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}
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#ifdef FCEUDEF_DEBUGGER
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if (!fceuindbg)
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#endif
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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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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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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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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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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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side = 'B';
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return(FCEU_InitPowerpad(w));
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}
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