| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Xodnizel |
| 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 char side; |
| 27 | static uint32 pprsb[2]; |
| 28 | static uint32 pprdata[2]; |
| 29 | |
| 30 | static uint8 FP_FASTAPASS(1) ReadPP(int w) |
| 31 | { |
| 32 | uint8 ret=0; |
| 33 | ret|=((pprdata[w]>>pprsb[w])&1)<<3; |
| 34 | ret|=((pprdata[w]>>(pprsb[w]+8))&1)<<4; |
| 35 | if(pprsb[w]>=4) |
| 36 | { |
| 37 | ret|=0x10; |
| 38 | if(pprsb[w]>=8) |
| 39 | ret|=0x08; |
| 40 | } |
| 41 | if(!fceuindbg) |
| 42 | pprsb[w]++; |
| 43 | return ret; |
| 44 | } |
| 45 | |
| 46 | static void FP_FASTAPASS(1) StrobePP(int w) |
| 47 | { |
| 48 | pprsb[w]=0; |
| 49 | } |
| 50 | |
| 51 | void FP_FASTAPASS(3) UpdatePP(int w, void *data, int arg) |
| 52 | { |
| 53 | static const char shifttableA[12]={8,9,0,1,11,7,4,2,10,6,5,3}; |
| 54 | static const char shifttableB[12]={1,0,9,8,2,4,7,11,3,5,6,10}; |
| 55 | int x; |
| 56 | |
| 57 | pprdata[w]=0; |
| 58 | |
| 59 | if(side=='A') |
| 60 | for(x=0;x<12;x++) |
| 61 | pprdata[w]|=(((*(uint32 *)data)>>x)&1)<<shifttableA[x]; |
| 62 | else |
| 63 | for(x=0;x<12;x++) |
| 64 | pprdata[w]|=(((*(uint32 *)data)>>x)&1)<<shifttableB[x]; |
| 65 | } |
| 66 | |
| 67 | static INPUTC PwrPadCtrl={ReadPP,0,StrobePP,UpdatePP,0,0}; |
| 68 | |
| 69 | static INPUTC *FCEU_InitPowerpad(int w) |
| 70 | { |
| 71 | pprsb[w]=pprdata[w]=0; |
| 72 | return(&PwrPadCtrl); |
| 73 | } |
| 74 | |
| 75 | INPUTC *FCEU_InitPowerpadA(int w) |
| 76 | { |
| 77 | side='A'; |
| 78 | return(FCEU_InitPowerpad(w)); |
| 79 | } |
| 80 | |
| 81 | INPUTC *FCEU_InitPowerpadB(int w) |
| 82 | { |
| 83 | side='B'; |
| 84 | return(FCEU_InitPowerpad(w)); |
| 85 | } |