43725da7 |
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 |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
19 | *\r |
20 | * FDS Conversion\r |
21 | *\r |
22 | */\r |
23 | \r |
24 | #include "mapinc.h"\r |
25 | \r |
26 | static uint8 reg, mirr;\r |
27 | static int32 IRQa, IRQCount, IRQLatch;\r |
28 | static uint8 *WRAM=NULL;\r |
29 | static uint32 WRAMSIZE;\r |
30 | \r |
31 | static SFORMAT StateRegs[]=\r |
32 | {\r |
33 | {&mirr, 1, "MIRR"},\r |
34 | {®, 1, "REGS"},\r |
35 | {&IRQa, 4, "IRQA"},\r |
36 | {&IRQCount, 4, "IRQC"},\r |
37 | {&IRQLatch, 4, "IRQL"},\r |
38 | {0}\r |
39 | };\r |
40 | \r |
41 | static void Sync(void)\r |
42 | {\r |
43 | setprg16(0x8000,reg);\r |
44 | setprg16(0xC000,2);\r |
45 | setmirror(mirr);\r |
46 | }\r |
47 | \r |
48 | static DECLFW(UNLKS7017Write)\r |
49 | {\r |
50 | // FCEU_printf("bs %04x %02x\n",A,V);\r |
51 | if((A & 0xFF00) == 0x4A00)\r |
52 | {\r |
53 | reg = ((A >> 2) & 3)|((A >> 4) & 4);\r |
54 | }\r |
55 | else if ((A & 0xFF00) == 0x5100)\r |
56 | {\r |
57 | Sync();\r |
58 | }\r |
59 | else if (A == 0x4020)\r |
60 | {\r |
61 | X6502_IRQEnd(FCEU_IQEXT);\r |
62 | IRQCount&=0xFF00;\r |
63 | IRQCount|=V;\r |
64 | }\r |
65 | else if (A == 0x4021)\r |
66 | {\r |
67 | X6502_IRQEnd(FCEU_IQEXT);\r |
68 | IRQCount&=0xFF;\r |
69 | IRQCount|=V<<8;\r |
70 | IRQa = 1;\r |
71 | }\r |
72 | else if (A == 0x4025)\r |
73 | {\r |
74 | mirr = ((V & 8) >> 3) ^ 1;\r |
75 | }\r |
76 | }\r |
77 | \r |
78 | static DECLFR(FDSRead4030)\r |
79 | {\r |
80 | X6502_IRQEnd(FCEU_IQEXT);\r |
81 | return X.IRQlow&FCEU_IQEXT?1:0;\r |
82 | }\r |
83 | \r |
84 | static void FP_FASTAPASS(1) UNL7017IRQ(int a)\r |
85 | {\r |
86 | if(IRQa)\r |
87 | {\r |
88 | IRQCount-=a;\r |
89 | if(IRQCount<=0)\r |
90 | {\r |
91 | IRQa=0;\r |
92 | X6502_IRQBegin(FCEU_IQEXT);\r |
93 | }\r |
94 | }\r |
95 | }\r |
96 | \r |
97 | static void UNLKS7017Power(void)\r |
98 | {\r |
99 | Sync();\r |
100 | setchr8(0);\r |
101 | setprg8r(0x10,0x6000,0);\r |
102 | SetReadHandler(0x6000,0x7FFF,CartBR);\r |
103 | SetWriteHandler(0x6000,0x7FFF,CartBW);\r |
104 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
105 | SetReadHandler(0x4030,0x4030,FDSRead4030);\r |
106 | SetWriteHandler(0x4020,0x5FFF,UNLKS7017Write);\r |
107 | }\r |
108 | \r |
109 | static void UNLKS7017Close(void)\r |
110 | {\r |
111 | if(WRAM)\r |
112 | FCEU_gfree(WRAM);\r |
113 | WRAM=NULL;\r |
114 | }\r |
115 | \r |
116 | static void StateRestore(int version)\r |
117 | {\r |
118 | Sync();\r |
119 | }\r |
120 | \r |
121 | void UNLKS7017_Init(CartInfo *info)\r |
122 | {\r |
123 | info->Power=UNLKS7017Power;\r |
124 | info->Close=UNLKS7017Close;\r |
125 | MapIRQHook=UNL7017IRQ;\r |
126 | \r |
127 | WRAMSIZE=8192;\r |
128 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
129 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
130 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
131 | \r |
132 | GameStateRestore=StateRestore;\r |
133 | AddExState(&StateRegs, ~0, 0, 0);\r |
134 | }\r |