59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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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 "share.h"
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static uint32 vbrsb[2];
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static uint32 vbrdata[2];
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static uint8 ReadVB(int w)
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{
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uint8 ret=0;
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ret |= (vbrdata[w]>>vbrsb[w])&1;
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if(vbrsb[w] >= 16)
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{
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ret|=0x1;
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vbrsb[w] = 16;
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}
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if(!fceuindbg)
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vbrsb[w]++;
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return ret;
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}
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static void StrobeVB(int w)
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{
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vbrsb[w]=0;
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}
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void UpdateVB(int w, void *data, int arg)
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{
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vbrdata[w]=0;
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for (int x=0;x<14;x++)
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{
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vbrdata[w]|=(((*(uint32 *)data)>>x)&1)<<x;
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}
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vbrdata[w]|=(1<<14); // fixed signature bit
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}
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static INPUTC VirtualBoyCtrl={ReadVB,0,StrobeVB,UpdateVB,0,0};
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INPUTC *FCEU_InitVirtualBoy(int w)
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{
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vbrsb[w]=vbrdata[w]=0;
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return(&VirtualBoyCtrl);
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}
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