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1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2007 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 |
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
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19 | * 63in1 ghostbusters\r |
20 | */\r |
21 | \r |
22 | #include "mapinc.h"\r |
23 | \r |
24 | static uint8 reg[2], bank;\r |
25 | static uint8 banks[4] = {0, 0, 1, 2};\r |
26 | static uint8 *CHRROM=NULL;\r |
27 | static uint32 CHRROMSIZE;\r |
28 | \r |
29 | static SFORMAT StateRegs[]=\r |
30 | {\r |
31 | {reg, 2, "REGS"},\r |
32 | {&bank, 1, "BANK"},\r |
33 | {0}\r |
34 | };\r |
35 | \r |
36 | static void Sync(void)\r |
37 | {\r |
38 | if(reg[0]&0x20)\r |
39 | {\r |
40 | setprg16r(banks[bank],0x8000,reg[0]&0x1F);\r |
41 | setprg16r(banks[bank],0xC000,reg[0]&0x1F);\r |
42 | }\r |
43 | else\r |
44 | setprg32r(banks[bank],0x8000,(reg[0]>>1)&0x0F);\r |
45 | if(reg[1]&2)\r |
46 | setchr8r(0x10,0);\r |
47 | else\r |
48 | setchr8(0);\r |
49 | setmirror((reg[0]&0x40)>>6);\r |
50 | }\r |
51 | \r |
52 | static DECLFW(BMCGhostbusters63in1Write)\r |
53 | {\r |
54 | reg[A&1]=V;\r |
55 | bank=((reg[0]&0x80)>>7)|((reg[1]&1)<<1);\r |
56 | // FCEU_printf("reg[0]=%02x, reg[1]=%02x, bank=%02x\n",reg[0],reg[1],bank);\r |
57 | Sync();\r |
58 | }\r |
59 | \r |
60 | static DECLFR(BMCGhostbusters63in1Read)\r |
61 | {\r |
62 | if(bank==1)\r |
63 | return X.DB;\r |
64 | else\r |
65 | return CartBR(A);\r |
66 | }\r |
67 | \r |
68 | static void BMCGhostbusters63in1Power(void)\r |
69 | {\r |
70 | reg[0]=reg[1]=0;\r |
71 | Sync();\r |
72 | SetReadHandler(0x8000,0xFFFF,BMCGhostbusters63in1Read);\r |
73 | SetWriteHandler(0x8000,0xFFFF,BMCGhostbusters63in1Write);\r |
74 | }\r |
75 | \r |
76 | static void BMCGhostbusters63in1Reset(void)\r |
77 | {\r |
78 | reg[0]=reg[1]=0;\r |
79 | }\r |
80 | \r |
81 | static void StateRestore(int version)\r |
82 | {\r |
83 | Sync();\r |
84 | }\r |
85 | \r |
86 | static void BMCGhostbusters63in1Close(void)\r |
87 | {\r |
88 | if(CHRROM)\r |
89 | FCEU_gfree(CHRROM);\r |
90 | CHRROM=NULL;\r |
91 | }\r |
92 | \r |
93 | void BMCGhostbusters63in1_Init(CartInfo *info)\r |
94 | {\r |
95 | info->Reset=BMCGhostbusters63in1Reset;\r |
96 | info->Power=BMCGhostbusters63in1Power;\r |
97 | info->Close=BMCGhostbusters63in1Close;\r |
98 | \r |
99 | CHRROMSIZE=8192; // dummy CHRROM, VRAM disable\r |
100 | CHRROM=(uint8*)FCEU_gmalloc(CHRROMSIZE);\r |
101 | SetupCartPRGMapping(0x10,CHRROM,CHRROMSIZE,0);\r |
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102 | AddExState(CHRROM, CHRROMSIZE, 0, "CROM");\r |
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103 | \r |
104 | GameStateRestore=StateRestore;\r |
105 | AddExState(&StateRegs, ~0, 0, 0);\r |
106 | }\r |