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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 2006 CaH4e3 |
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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 |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | */ |
20 | |
21 | #include "mapinc.h" |
22 | |
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23 | static uint8 cmd, laststrobe, trigger; |
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24 | static uint8 DRegs[8]; |
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25 | static SFORMAT StateRegs[]= |
26 | { |
27 | {&cmd, 1, "CMD"}, |
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28 | {&laststrobe, 1, "STB"}, |
29 | {&trigger, 1, "TRG"}, |
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30 | {DRegs, 8, "DREG"}, |
31 | {0} |
32 | }; |
33 | |
34 | static void Sync(void) |
35 | { |
36 | setprg32(0x8000,(DRegs[0]<<4)|(DRegs[1]&0xF)); |
37 | } |
38 | |
39 | static void StateRestore(int version) |
40 | { |
41 | Sync(); |
42 | } |
43 | |
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44 | static DECLFR(ReadLow) |
45 | { |
46 | switch (A&0x7700) |
47 | { |
48 | case 0x5100: return DRegs[2]; break; |
49 | case 0x5500: if(trigger) |
50 | return DRegs[2]; |
51 | else |
52 | return 0; |
53 | } |
54 | return 4; |
55 | } |
56 | |
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57 | static DECLFW(Write) |
58 | { |
59 | switch (A&0x7300) |
60 | { |
61 | case 0x5100: DRegs[0]=V; Sync(); break; |
62 | case 0x5000: DRegs[1]=V; Sync(); break; |
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63 | case 0x5300: DRegs[2]=V; break; |
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64 | } |
65 | } |
66 | |
67 | static DECLFW(Write2) |
68 | { |
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69 | if(A==0x5101) |
70 | { |
71 | if(laststrobe&&!V) |
72 | { |
73 | trigger^=1; |
74 | } |
75 | laststrobe=V; |
76 | }else if(A==0x5100&&V==6) //damn thoose protected games |
77 | setprg32(0x8000,3); |
78 | else |
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79 | switch (A&0x7300) |
80 | { |
81 | case 0x5200: DRegs[0]=V; Sync(); break; |
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82 | case 0x5000: DRegs[1]=V; Sync(); if(!(DRegs[1]&0x80)&&(scanline<128)) setchr8(0); break; |
83 | case 0x5300: DRegs[2]=V; break; |
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84 | } |
85 | } |
86 | |
87 | static uint8 WRAM[8192]; |
88 | static DECLFR(AWRAM) |
89 | { |
90 | return(WRAM[A-0x6000]); |
91 | } |
92 | |
93 | static DECLFW(BWRAM) |
94 | { |
95 | WRAM[A-0x6000]=V; |
96 | } |
97 | |
98 | static void Power(void) |
99 | { |
100 | memset(DRegs,0,8); |
101 | DRegs[1]=0xFF; |
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102 | cmd=0; |
103 | SetReadHandler(0x8000,0xFFFF,CartBR); |
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104 | SetWriteHandler(0x4020,0x5FFF,Write); |
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105 | SetReadHandler(0x6000,0x7FFF,AWRAM); |
106 | SetWriteHandler(0x6000,0x7FFF,BWRAM); |
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107 | setchr8(0); |
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108 | Sync(); |
109 | } |
110 | |
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111 | static void M163HB(void) |
112 | { |
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113 | if(DRegs[1]&0x80) |
114 | { |
115 | if(scanline==239) |
116 | { |
117 | setchr4(0x0000,0); |
118 | setchr4(0x1000,0); |
119 | } |
120 | else if(scanline==127) |
121 | { |
122 | setchr4(0x0000,1); |
123 | setchr4(0x1000,1); |
124 | } |
125 | } |
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126 | } |
127 | |
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128 | static void Power2(void) |
129 | { |
130 | memset(DRegs,0,8); |
131 | DRegs[1]=0xFF; |
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132 | laststrobe=1; |
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133 | cmd=0; |
134 | SetReadHandler(0x8000,0xFFFF,CartBR); |
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135 | SetWriteHandler(0x4020,0x5FFF,Write2); |
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136 | SetReadHandler(0x6000,0x7FFF,AWRAM); |
137 | SetWriteHandler(0x6000,0x7FFF,BWRAM); |
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138 | SetReadHandler(0x5000,0x5FFF,ReadLow); |
139 | setchr8(0); |
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140 | Sync(); |
141 | } |
142 | |
143 | void Mapper164_Init(CartInfo *info) |
144 | { |
145 | info->Power=Power; |
146 | GameStateRestore=StateRestore; |
147 | AddExState(&StateRegs, ~0, 0, 0); |
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148 | AddExState(WRAM, 8192, 0, "WRAM"); |
149 | info->SaveGame[0]=WRAM;\r |
150 | info->SaveGameLen[0]=8192; |
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151 | } |
152 | |
153 | void Mapper163_Init(CartInfo *info) |
154 | { |
155 | info->Power=Power2; |
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156 | GameHBIRQHook=M163HB; |
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157 | GameStateRestore=StateRestore; |
158 | AddExState(&StateRegs, ~0, 0, 0); |
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159 | AddExState(WRAM, 8192, 0, "WRAM"); |
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160 | } |