c62d2810 |
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 | #define suntoggle mapbyte1[0] |
25 | |
26 | DECLFW(Mapper67_write) |
27 | { |
28 | A&=0xF800; |
29 | if((A&0x800) && A<=0xb800) |
30 | { |
31 | VROM_BANK2((A-0x8800)>>1,V); |
32 | } |
33 | else switch(A) |
34 | { |
35 | case 0xc800: |
36 | case 0xc000:if(!suntoggle) |
37 | {IRQCount&=0xFF;IRQCount|=V<<8;} |
38 | else{IRQCount&=0xFF00;IRQCount|=V;} |
39 | suntoggle^=1; |
40 | break; |
41 | case 0xd800:suntoggle=0;IRQa=V&0x10;break; |
42 | |
43 | case 0xe800:switch(V&3) |
44 | { |
45 | case 0:MIRROR_SET2(1);break; |
46 | case 1:MIRROR_SET2(0);break; |
47 | case 2:onemir(0);break; |
48 | case 3:onemir(1);break; |
49 | } |
50 | break; |
c0bf6f9f |
51 | case 0xf800:ROM_BANK16(0x8000,V); |
52 | X6502_Rebase();break; |
c62d2810 |
53 | } |
54 | } |
55 | static void FP_FASTAPASS(1) SunIRQHook(int a) |
56 | { |
57 | if(IRQa) |
58 | { |
59 | IRQCount-=a; |
60 | if(IRQCount<=0) |
61 | {TriggerIRQ();IRQa=0;IRQCount=0xFFFF;} |
62 | } |
63 | } |
64 | void Mapper67_init(void) |
65 | { |
66 | SetWriteHandler(0x8000,0xffff,Mapper67_write); |
67 | MapIRQHook=SunIRQHook; |
68 | } |