d97315ac |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2003 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 "mapinc.h" |
22 | |
23 | static uint8 PRGSel; |
24 | static uint8 PBuf[4],PSel; |
25 | static uint8 cmd; |
26 | static uint8 DRegs[8]; |
27 | static uint32 count=0; |
28 | static uint32 last=0; |
29 | |
30 | static DECLFW(M208Write1) |
31 | { |
32 | PRGSel=(V&0x1)|((V>>3)&0x2); |
33 | setprg32(0x8000,PRGSel); |
34 | } |
35 | |
36 | static DECLFW(M208Write2) |
37 | { |
38 | static uint8 lut[256]={ |
39 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x59, 0x49, 0x19, 0x09, 0x59, 0x49, 0x19, 0x09, |
40 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x51, 0x41, 0x11, 0x01, 0x51, 0x41, 0x11, 0x01, |
41 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x59, 0x49, 0x19, 0x09, 0x59, 0x49, 0x19, 0x09, |
42 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x51, 0x41, 0x11, 0x01, 0x51, 0x41, 0x11, 0x01, |
43 | 0x00, 0x10, 0x40, 0x50, 0x00, 0x10, 0x40, 0x50,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
44 | 0x08, 0x18, 0x48, 0x58, 0x08, 0x18, 0x48, 0x58,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
45 | 0x00, 0x10, 0x40, 0x50, 0x00, 0x10, 0x40, 0x50,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
46 | 0x08, 0x18, 0x48, 0x58, 0x08, 0x18, 0x48, 0x58,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
47 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x58, 0x48, 0x18, 0x08, 0x58, 0x48, 0x18, 0x08, |
48 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x50, 0x40, 0x10, 0x00, 0x50, 0x40, 0x10, 0x00, |
49 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x58, 0x48, 0x18, 0x08, 0x58, 0x48, 0x18, 0x08, |
50 | 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59, 0x59,0x50, 0x40, 0x10, 0x00, 0x50, 0x40, 0x10, 0x00, |
51 | 0x01, 0x11, 0x41, 0x51, 0x01, 0x11, 0x41, 0x51,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
52 | 0x09, 0x19, 0x49, 0x59, 0x09, 0x19, 0x49, 0x59,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
53 | 0x01, 0x11, 0x41, 0x51, 0x01, 0x11, 0x41, 0x51,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
54 | 0x09, 0x19, 0x49, 0x59, 0x09, 0x19, 0x49, 0x59,0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
55 | |
56 | }; |
57 | if(A<=0x57FF) PSel=V; |
58 | else |
59 | PBuf[(A&0x03)]=V^lut[PSel]; |
60 | } |
61 | |
62 | static DECLFR(M208Read) |
63 | { |
64 | return(PBuf[(A&0x3)]); |
65 | } |
66 | |
67 | static void Sync(void) |
68 | { |
69 | int x; |
70 | |
71 | setchr2(0x0000,DRegs[0]>>1); |
72 | setchr2(0x0800,DRegs[1]>>1); |
73 | for(x=0;x<4;x++) |
74 | setchr1(0x1000+x*0x400,DRegs[2+x]); |
75 | } |
76 | |
77 | static DECLFW(M208HWrite) |
78 | { |
79 | switch(A&0xe001) |
80 | { |
81 | case 0xc000:IRQLatch=IRQCount=V;break; |
82 | case 0xc001:IRQCount=IRQLatch;last=count=0;break; |
83 | case 0xe000:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break; |
84 | case 0xe001:IRQa=1;break; |
85 | case 0x8000:cmd=V;break; |
86 | case 0x8001:DRegs[cmd&7]=V; |
87 | Sync(); |
88 | break; |
89 | |
90 | } |
91 | } |
92 | |
93 | static void M208Power(void) |
94 | { |
95 | PRGSel=3; |
96 | setprg32(0x8000,3); |
97 | SetWriteHandler(0x4800,0x4FFF,M208Write1); |
98 | SetWriteHandler(0x5000,0x5fff,M208Write2); |
99 | SetWriteHandler(0x8000,0xFFFF,M208HWrite); |
100 | SetReadHandler(0x5800,0x5FFF,M208Read); |
101 | SetReadHandler(0x8000,0xffff,CartBR); |
102 | } |
103 | |
104 | static void sl(void) |
105 | { |
106 | if(IRQa) |
107 | { |
108 | if(IRQCount>=0) |
109 | { |
110 | IRQCount--; |
111 | if(IRQCount<0) |
112 | { |
113 | X6502_IRQBegin(FCEU_IQEXT); |
114 | } |
115 | } |
116 | } |
117 | } |
118 | |
119 | static void FP_FASTAPASS(1) foo(uint32 A) |
120 | { |
121 | if((A&0x2000) && !(last&0x2000)) |
122 | { |
123 | count++; |
124 | if(count==42) |
125 | { |
126 | sl(); |
127 | count=0; |
128 | } |
129 | } |
130 | last=A; |
131 | } |
132 | |
133 | void Mapper208_Init(CartInfo *info) |
134 | { |
135 | info->Power=M208Power; |
136 | //GameHBIRQHook=sl; |
137 | PPU_hook=foo; |
138 | } |
139 | |