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1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
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4 | * Copyright (C) 2002 Xodnizel |
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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> |
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22 | #include <stdlib.h> |
23 | #include "share.h" |
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24 | |
25 | |
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26 | static char side; |
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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 | } |
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41 | if(!fceuindbg) |
42 | pprsb[w]++; |
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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 | { |
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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]; |
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65 | } |
66 | |
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67 | static INPUTC PwrPadCtrl={ReadPP,0,StrobePP,UpdatePP,0,0}; |
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68 | |
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69 | static INPUTC *FCEU_InitPowerpad(int w) |
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70 | { |
71 | pprsb[w]=pprdata[w]=0; |
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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)); |
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85 | } |