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1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2006 CaH4e3\r |
5 | *\r |
6 | * This program is free software; you can redistribute it and/or modify\r |
7 | * it under the terms of the GNU General Public License as published by\r |
8 | * the Free Software Foundation; either version 2 of the License, or\r |
9 | * (at your option) any later version.\r |
10 | *\r |
11 | * This program is distributed in the hope that it will be useful,\r |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
14 | * GNU General Public License for more details.\r |
15 | *\r |
16 | * You should have received a copy of the GNU General Public License\r |
17 | * along with this program; if not, write to the Free Software\r |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
19 | * TXC mappers\r |
20 | */\r |
21 | \r |
22 | #include "mapinc.h"\r |
23 | \r |
24 | static uint8 reg[4], cmd, is172, is173;\r |
25 | static SFORMAT StateRegs[]=\r |
26 | {\r |
27 | {reg, 4, "REGS"},\r |
28 | {&cmd, 1, "CMD"},\r |
29 | {0}\r |
30 | };\r |
31 | \r |
32 | static void Sync(void)\r |
33 | {\r |
34 | setprg32(0x8000,(reg[2]>>2)&1);\r |
35 | if(is172)\r |
36 | setchr8((((cmd^reg[2])>>3)&2)|(((cmd^reg[2])>>5)&1)); // 1991 DU MA Racing probably CHR bank sequence is WRONG, so it is possible to\r |
37 | // rearrange CHR banks for normal UNIF board and mapper 172 is unneccessary\r |
38 | else\r |
39 | setchr8(reg[2]&3);\r |
40 | }\r |
41 | \r |
42 | static DECLFW(UNL22211WriteLo)\r |
43 | {\r |
44 | // FCEU_printf("bs %04x %02x\n",A,V);\r |
45 | reg[A&3]=V;\r |
46 | }\r |
47 | \r |
48 | static DECLFW(UNL22211WriteHi)\r |
49 | {\r |
50 | // FCEU_printf("bs %04x %02x\n",A,V);\r |
51 | cmd=V;\r |
52 | Sync();\r |
53 | }\r |
54 | \r |
55 | static DECLFR(UNL22211ReadLo)\r |
56 | {\r |
57 | return (reg[1]^reg[2])|(is173?0x01:0x40);\r |
58 | // if(reg[3])\r |
59 | // return reg[2];\r |
60 | // else\r |
61 | // return X.DB;\r |
62 | }\r |
63 | \r |
64 | static void UNL22211Power(void)\r |
65 | {\r |
66 | Sync();\r |
67 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
68 | SetReadHandler(0x4100,0x4100,UNL22211ReadLo);\r |
69 | SetWriteHandler(0x4100,0x4103,UNL22211WriteLo);\r |
70 | SetWriteHandler(0x8000,0xFFFF,UNL22211WriteHi);\r |
71 | }\r |
72 | \r |
73 | static void StateRestore(int version)\r |
74 | {\r |
75 | Sync();\r |
76 | }\r |
77 | \r |
78 | void UNL22211_Init(CartInfo *info)\r |
79 | {\r |
80 | is172=0;\r |
81 | is173=0;\r |
82 | info->Power=UNL22211Power;\r |
83 | GameStateRestore=StateRestore;\r |
84 | AddExState(&StateRegs, ~0, 0, 0);\r |
85 | }\r |
86 | \r |
87 | void Mapper172_Init(CartInfo *info)\r |
88 | {\r |
89 | is172=1; \r |
90 | is173=0;\r |
91 | info->Power=UNL22211Power;\r |
92 | GameStateRestore=StateRestore;\r |
93 | AddExState(&StateRegs, ~0, 0, 0);\r |
94 | }\r |
95 | \r |
96 | void Mapper173_Init(CartInfo *info)\r |
97 | {\r |
98 | is172=0; \r |
99 | is173=1;\r |
100 | info->Power=UNL22211Power;\r |
101 | GameStateRestore=StateRestore;\r |
102 | AddExState(&StateRegs, ~0, 0, 0);\r |
103 | }\r |