43725da7 |
1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2012 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 | * FFE Copier Mapper\r |
21 | *\r |
22 | */\r |
23 | \r |
24 | #include "mapinc.h"\r |
25 | \r |
26 | static uint8 preg[4], creg[8];\r |
27 | static uint8 IRQa, mirr;\r |
28 | static int32 IRQCount, IRQLatch;\r |
29 | \r |
30 | static SFORMAT StateRegs[]=\r |
31 | {\r |
32 | {preg, 4, "PREG"},\r |
33 | {creg, 8, "CREG"},\r |
34 | {&mirr, 1, "MIRR"},\r |
35 | {&IRQa, 1, "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 | int i;\r |
44 | for(i=0; i<8; i++) setchr1(i<<10,creg[i]);\r |
45 | setprg8(0x8000,preg[0]);\r |
46 | setprg8(0xA000,preg[1]);\r |
47 | setprg8(0xC000,preg[2]);\r |
48 | setprg8(0xE000,preg[3]);\r |
49 | switch(mirr) {\r |
50 | case 0: setmirror(MI_0); break;\r |
51 | case 1: setmirror(MI_1); break;\r |
52 | case 2: setmirror(MI_H); break;\r |
53 | case 3: setmirror(MI_V); break;\r |
54 | }\r |
55 | }\r |
56 | \r |
57 | static DECLFW(M17WriteMirr)\r |
58 | {\r |
59 | mirr = ((A << 1) & 2)|((V >> 4) & 1);\r |
60 | Sync();\r |
61 | }\r |
62 | \r |
63 | static DECLFW(M17WriteIRQ)\r |
64 | {\r |
65 | switch(A) {\r |
66 | case 0x4501: IRQa=0; X6502_IRQEnd(FCEU_IQEXT); break;\r |
67 | case 0x4502: IRQCount&=0xFF00; IRQCount|=V; break;\r |
68 | case 0x4503: IRQCount&=0x00FF; IRQCount|=V<<8; IRQa=1; break;\r |
69 | }\r |
70 | }\r |
71 | \r |
72 | static DECLFW(M17WritePrg)\r |
73 | {\r |
74 | preg[A & 3] = V;\r |
75 | Sync();\r |
76 | }\r |
77 | \r |
78 | static DECLFW(M17WriteChr)\r |
79 | {\r |
80 | creg[A & 7] = V;\r |
81 | Sync();\r |
82 | }\r |
83 | \r |
84 | static void M17Power(void)\r |
85 | {\r |
86 | preg[3] = ~0;\r |
87 | Sync();\r |
88 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
89 | SetWriteHandler(0x42FE,0x42FF,M17WriteMirr);\r |
90 | SetWriteHandler(0x4500,0x4503,M17WriteIRQ);\r |
91 | SetWriteHandler(0x4504,0x4507,M17WritePrg);\r |
92 | SetWriteHandler(0x4510,0x4517,M17WriteChr);\r |
93 | }\r |
94 | \r |
95 | static void FP_FASTAPASS(1) M17IRQHook(int a)\r |
96 | {\r |
97 | if(IRQa)\r |
98 | {\r |
99 | IRQCount+=a;\r |
100 | if(IRQCount>=0x10000)\r |
101 | {\r |
102 | X6502_IRQBegin(FCEU_IQEXT);\r |
103 | IRQa=0;\r |
104 | IRQCount=0;\r |
105 | }\r |
106 | }\r |
107 | }\r |
108 | \r |
109 | static void StateRestore(int version)\r |
110 | {\r |
111 | Sync();\r |
112 | }\r |
113 | \r |
114 | void Mapper17_Init(CartInfo *info)\r |
115 | {\r |
116 | info->Power=M17Power;\r |
117 | GameHBIRQHook=M17IRQHook;\r |
118 | GameStateRestore=StateRestore;\r |
119 | \r |
120 | AddExState(&StateRegs, ~0, 0, 0);\r |
121 | }\r |
122 | \r |