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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 | |
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25 | static DECLFW(Mapper43_write) |
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26 | { |
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27 | //printf("$%04x:$%02x\n",A,V); |
28 | if((A&0x8122)==0x8122) |
29 | { |
30 | X6502_IRQEnd(FCEU_IQEXT); |
31 | if(V&2) IRQa=1; |
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32 | else |
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33 | IRQCount=IRQa=0; |
34 | } |
35 | } |
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36 | |
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37 | static DECLFW(M43Low) |
38 | { |
39 | // int transo[8]={4,3,4,4,4,7,5,6}; |
40 | int transo[8]={4,3,2,3,4,7,5,6}; |
41 | A&=0xF0FF; |
42 | if(A==0x4022) |
43 | setprg8(0x6000,transo[V&7]); |
44 | //printf("$%04x:$%02x\n",A,V); |
45 | } |
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46 | |
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47 | static void FP_FASTAPASS(1) M43Ho(int a) |
48 | { |
49 | IRQCount+=a; |
50 | if(IRQa) |
51 | if(IRQCount>=4096) |
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52 | { |
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53 | X6502_IRQBegin(FCEU_IQEXT); |
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54 | } |
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55 | } |
56 | |
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57 | //static DECLFR(boo) |
58 | //{ |
59 | // printf("$%04x\n",A); |
60 | // return( ROM[0x2000*8 +0x1000 +(A-0x5000)]); |
61 | //} |
62 | |
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63 | void Mapper43_init(void) |
64 | { |
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65 | setprg4(0x5000,16); |
66 | setprg8(0x6000,2); |
67 | setprg8(0x8000,1); |
68 | setprg8(0xa000,0); |
69 | setprg8(0xc000,4); |
70 | setprg8(0xe000,9); |
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71 | SetWriteHandler(0x8000,0xffff,Mapper43_write); |
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72 | SetWriteHandler(0x4020,0x7fff,M43Low); |
73 | //SetReadHandler(0x5000,0x5fff,boo); |
74 | SetReadHandler(0x6000,0xffff,CartBR); |
75 | MapIRQHook=M43Ho; |
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76 | } |