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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 | */\r |
20 | \r |
21 | #include "mapinc.h"\r |
22 | \r |
23 | static uint8 reg[16], IRQa;\r |
24 | static uint32 IRQCount;\r |
25 | static uint8 *WRAM=NULL;\r |
26 | static uint32 WRAMSIZE;\r |
27 | \r |
28 | static SFORMAT StateRegs[]=\r |
29 | {\r |
30 | {&IRQa, 1, "IRQA"},\r |
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31 | {&IRQCount, 4, "IRQC"},\r |
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32 | {reg, 16, "REGS"},\r |
33 | {0}\r |
34 | };\r |
35 | \r |
36 | static void Sync(void)\r |
37 | {\r |
38 | setchr1(0x0000,reg[0]&0xfe);\r |
39 | setchr1(0x0400,reg[1]|1);\r |
40 | setchr1(0x0800,reg[2]&0xfe);\r |
41 | setchr1(0x0c00,reg[3]|1);\r |
42 | setchr1(0x1000,reg[4]);\r |
43 | setchr1(0x1400,reg[5]);\r |
44 | setchr1(0x1800,reg[6]);\r |
45 | setchr1(0x1c00,reg[7]);\r |
46 | setprg8r(0x10,0x6000,0);\r |
47 | setprg8(0x8000,(reg[0x8]&0xf)|0x10);\r |
48 | setprg8(0xA000,(reg[0x9]&0x1f));\r |
49 | setprg8(0xC000,(reg[0xa]&0x1f));\r |
50 | setprg8(0xE000,(reg[0xb]&0xf)|0x10);\r |
51 | setmirror((reg[0xc]&1)^1);\r |
52 | }\r |
53 | \r |
54 | static DECLFW(M106Write)\r |
55 | {\r |
56 | A&=0xF;\r |
57 | switch(A)\r |
58 | {\r |
59 | case 0xD: IRQa=0; IRQCount=0; X6502_IRQEnd(FCEU_IQEXT); break;\r |
60 | case 0xE: IRQCount=(IRQCount&0xFF00)|V; break;\r |
61 | case 0xF: IRQCount=(IRQCount&0x00FF)|(V<<8); IRQa=1; break;\r |
62 | default: reg[A]=V; Sync(); break;\r |
63 | }\r |
64 | }\r |
65 | \r |
66 | static void M106Power(void)\r |
67 | {\r |
68 | reg[8]=reg[9]=reg[0xa]=reg[0xb]=-1;\r |
69 | Sync();\r |
70 | SetReadHandler(0x6000,0x7FFF,CartBR);\r |
71 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
72 | SetWriteHandler(0x6000,0x7FFF,CartBW);\r |
73 | SetWriteHandler(0x8000,0xFFFF,M106Write);\r |
74 | }\r |
75 | \r |
76 | static void M106Reset(void)\r |
77 | {\r |
78 | }\r |
79 | \r |
80 | static void M106Close(void)\r |
81 | {\r |
82 | if(WRAM)\r |
83 | FCEU_gfree(WRAM);\r |
84 | WRAM=NULL;\r |
85 | }\r |
86 | \r |
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87 | void FP_FASTAPASS(1) M106CpuHook(int a)\r |
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88 | {\r |
89 | if(IRQa)\r |
90 | {\r |
91 | IRQCount+=a;\r |
92 | if(IRQCount>0x10000)\r |
93 | {\r |
94 | X6502_IRQBegin(FCEU_IQEXT);\r |
95 | IRQa=0;\r |
96 | }\r |
97 | }\r |
98 | }\r |
99 | \r |
100 | static void StateRestore(int version)\r |
101 | {\r |
102 | Sync();\r |
103 | }\r |
104 | \r |
105 | void Mapper106_Init(CartInfo *info)\r |
106 | {\r |
107 | info->Reset=M106Reset;\r |
108 | info->Power=M106Power;\r |
109 | info->Close=M106Close;\r |
110 | MapIRQHook=M106CpuHook;\r |
111 | GameStateRestore=StateRestore;\r |
112 | \r |
113 | WRAMSIZE=8192;\r |
114 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
115 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
116 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
117 | \r |
118 | AddExState(&StateRegs, ~0, 0, 0);\r |
119 | }\r |