| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include <string.h> |
| 22 | #include <stdlib.h> |
| 23 | #include "share.h" |
| 24 | |
| 25 | |
| 26 | static uint32 pprsb[2]; |
| 27 | static uint32 pprdata[2]; |
| 28 | |
| 29 | static uint8 FP_FASTAPASS(1) ReadPP(int w) |
| 30 | { |
| 31 | uint8 ret=0; |
| 32 | ret|=((pprdata[w]>>pprsb[w])&1)<<3; |
| 33 | ret|=((pprdata[w]>>(pprsb[w]+8))&1)<<4; |
| 34 | if(pprsb[w]>=4) |
| 35 | { |
| 36 | ret|=0x10; |
| 37 | if(pprsb[w]>=8) |
| 38 | ret|=0x08; |
| 39 | } |
| 40 | pprsb[w]++; |
| 41 | return ret; |
| 42 | } |
| 43 | |
| 44 | static void FP_FASTAPASS(1) StrobePP(int w) |
| 45 | { |
| 46 | pprsb[w]=0; |
| 47 | } |
| 48 | |
| 49 | void FP_FASTAPASS(3) UpdatePP(int w, void *data, int arg) |
| 50 | { |
| 51 | pprdata[w]=*(uint32 *)data; |
| 52 | } |
| 53 | |
| 54 | static INPUTC PPC={ReadPP,0,StrobePP,UpdatePP,0,0}; |
| 55 | |
| 56 | INPUTC *FCEU_InitPowerpad(int w) |
| 57 | { |
| 58 | pprsb[w]=pprdata[w]=0; |
| 59 | return(&PPC); |
| 60 | } |