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1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Ben Parnell |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | #include "mapinc.h" |
22 | |
23 | |
24 | void FP_FASTAPASS(1) IREMIRQHook(int a) |
25 | { |
26 | if(IRQa) |
27 | { |
28 | IRQCount-=a; |
29 | if(IRQCount<=0-4) |
30 | { |
31 | TriggerIRQ(); |
32 | IRQa=0; |
33 | IRQCount=0xFFFF; |
34 | } |
35 | } |
36 | } |
37 | |
38 | DECLFW(Mapper65_write) |
39 | { |
40 | switch(A) |
41 | { |
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42 | case 0x8000:ROM_BANK8(0x8000,V); |
43 | X6502_Rebase();break; |
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44 | case 0x9000:MIRROR_SET2((V>>6)&1);break; |
45 | case 0x9003:IRQa=V&0x80;break; |
46 | case 0x9004:IRQCount=IRQLatch;break; |
47 | case 0x9005: IRQLatch&=0x00FF; |
48 | IRQLatch|=V<<8; |
49 | break; |
50 | case 0x9006: IRQLatch&=0xFF00;IRQLatch|=V; |
51 | break; |
52 | case 0xB000:VROM_BANK1(0x0000,V);break; |
53 | case 0xB001:VROM_BANK1(0x0400,V);break; |
54 | case 0xB002:VROM_BANK1(0x0800,V);break; |
55 | case 0xB003:VROM_BANK1(0x0C00,V);break; |
56 | case 0xB004:VROM_BANK1(0x1000,V);break; |
57 | case 0xB005:VROM_BANK1(0x1400,V);break; |
58 | case 0xB006:VROM_BANK1(0x1800,V);break; |
59 | case 0xB007:VROM_BANK1(0x1C00,V);break; |
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60 | case 0xa000:ROM_BANK8(0xA000,V); |
61 | X6502_Rebase();break; |
62 | case 0xC000:ROM_BANK8(0xC000,V); |
63 | X6502_Rebase();break; |
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64 | } |
65 | } |
66 | |
67 | void Mapper65_init(void) |
68 | { |
69 | MapIRQHook=IREMIRQHook; |
70 | SetWriteHandler(0x8000,0xffff,Mapper65_write); |
71 | } |