c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
d97315ac |
4 | * Copyright (C) 2002 Xodnizel |
c62d2810 |
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 |
386f5371 |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
c62d2810 |
19 | */ |
20 | |
21 | #include "mapinc.h" |
22 | |
23 | |
24 | |
386f5371 |
25 | static void FFEIRQHook(int a) |
c62d2810 |
26 | { |
27 | if(IRQa) |
28 | { |
29 | IRQCount+=a; |
c62d2810 |
30 | if(IRQCount>=0x10000) |
31 | { |
d97315ac |
32 | X6502_IRQBegin(FCEU_IQEXT); |
c62d2810 |
33 | IRQa=0; |
34 | IRQCount=0; |
35 | } |
36 | } |
37 | } |
38 | |
39 | |
40 | DECLFW(Mapper17_write) |
41 | { |
42 | switch(A){ |
43 | default: |
d97315ac |
44 | break; |
c62d2810 |
45 | case 0x42FE: |
46 | onemir((V>>4)&1); |
47 | break; |
48 | case 0x42FF: |
49 | MIRROR_SET((V>>4)&1); |
d97315ac |
50 | break; |
51 | case 0x4501:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break; |
c62d2810 |
52 | case 0x4502:IRQCount&=0xFF00;IRQCount|=V;break; |
53 | case 0x4503:IRQCount&=0x00FF;IRQCount|=V<<8;IRQa=1;break; |
d97315ac |
54 | case 0x4504: ROM_BANK8(0x8000,V);break; |
55 | case 0x4505: ROM_BANK8(0xA000,V);break; |
56 | case 0x4506: ROM_BANK8(0xC000,V);break; |
57 | case 0x4507: ROM_BANK8(0xE000,V);break; |
c62d2810 |
58 | case 0x4510: VROM_BANK1(0x0000,V);break; |
59 | case 0x4511: VROM_BANK1(0x0400,V);break; |
60 | case 0x4512: VROM_BANK1(0x0800,V);break; |
61 | case 0x4513: VROM_BANK1(0x0C00,V);break; |
62 | case 0x4514: VROM_BANK1(0x1000,V);break; |
63 | case 0x4515: VROM_BANK1(0x1400,V);break; |
64 | case 0x4516: VROM_BANK1(0x1800,V);break; |
65 | case 0x4517: VROM_BANK1(0x1C00,V);break; |
66 | } |
67 | } |
68 | |
69 | void Mapper17_init(void) |
70 | { |
71 | MapIRQHook=FFEIRQHook; |
72 | SetWriteHandler(0x4020,0x5fff,Mapper17_write); |
73 | } |