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1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
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4 | * Copyright (C) 2002 Xodnizel |
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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 | |
25 | DECLFW(Mapper117_write) |
26 | { |
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27 | //if(A>=0xc000) |
28 | //printf("$%04x:$%02x, %d,%d\n",A,V,scanline,timestamp); |
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29 | switch(A) |
30 | { |
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31 | case 0xc001:IRQLatch=V;break; |
32 | case 0xc003:IRQCount=IRQLatch;IRQa|=2;break; |
33 | case 0xe000:IRQa&=~1;IRQa|=V&1;X6502_IRQEnd(FCEU_IQEXT);break; |
34 | case 0xc002:X6502_IRQEnd(FCEU_IQEXT);break; |
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35 | case 0xa000:VROM_BANK1(0x0000,V);break; |
36 | case 0xa001:VROM_BANK1(0x0400,V);break; |
37 | case 0xa002:VROM_BANK1(0x0800,V);break; |
38 | case 0xa003:VROM_BANK1(0x0c00,V);break; |
39 | case 0xa004:VROM_BANK1(0x1000,V);break; |
40 | case 0xa005:VROM_BANK1(0x1400,V);break; |
41 | case 0xa006:VROM_BANK1(0x1800,V);break; |
42 | case 0xa007:VROM_BANK1(0x1c00,V);break; |
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43 | case 0x8000:ROM_BANK8(0x8000,V);break; |
44 | case 0x8001:ROM_BANK8(0xa000,V);break; |
45 | case 0x8002:ROM_BANK8(0xc000,V);break; |
46 | case 0x8003:ROM_BANK8(0xe000,V);break; |
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47 | } |
48 | } |
49 | |
50 | static void Mapper117_hb(void) |
51 | { |
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52 | //if(scanline==0x40) X6502_IRQBegin(FCEU_IQEXT); |
53 | //return; |
54 | if(IRQa==3 && IRQCount) |
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55 | { |
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56 | IRQCount--; |
57 | if(!IRQCount) |
58 | { |
59 | IRQa&=1; |
60 | X6502_IRQBegin(FCEU_IQEXT); |
61 | } |
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62 | } |
63 | } |
64 | |
65 | void Mapper117_init(void) |
66 | { |
67 | GameHBIRQHook=Mapper117_hb; |
68 | SetWriteHandler(0x8000,0xffff,Mapper117_write); |
69 | } |
70 | |