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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 | |
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23 | |
24 | |
25 | static DECLFW(Mapper255_write) |
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26 | { |
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27 | uint32 pbank=(A>>7)&0x1F; |
28 | uint32 cbank=A&0x3F; |
29 | uint32 rbank=(A>>14)&1; |
30 | |
31 | // printf("$%04x:$%02x\n",A,V); |
32 | // printf("%2x:%2x:%2x,%2x\n",pbank,cbank,rbank,(A&0x40)>>6); |
33 | |
34 | if(A&0x1000) |
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35 | { |
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36 | ROM_BANK16(0x8000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6)); |
37 | ROM_BANK16(0xc000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6)); |
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38 | } |
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39 | else |
40 | { |
41 | ROM_BANK32(pbank|(rbank<<5)); |
42 | } |
43 | MIRROR_SET((A>>13)&1); |
44 | VROM_BANK8((rbank<<6)|cbank); |
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45 | } |
46 | |
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47 | static DECLFW(Mapper255_wl) |
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48 | { |
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49 | // printf("Wr: $%04x:$%02x\n",A,V); |
50 | mapbyte1[A&3]=V&0xF; |
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51 | } |
52 | |
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53 | static DECLFR(Mapper255_read) |
54 | { |
55 | //printf("Rd: $%04x\n",A); |
56 | return(mapbyte1[A&3]); //|(X.DB&0xF0)); |
57 | } |
58 | |
59 | void Mapper255_init(void) |
60 | { |
61 | mapbyte1[0]=mapbyte1[1]=0xF; |
62 | ROM_BANK32(0); |
63 | VROM_BANK8(0); |
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64 | SetWriteHandler(0x5800,0x5FF0,Mapper255_wl); |
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65 | SetWriteHandler(0x8000,0xffff,Mapper255_write); |
66 | SetReadHandler(0x5800,0x5FFF,Mapper255_read); |
67 | } |