mapper fixes for ncpu, debug is broken atm
[fceu.git] / mappers / 15.c
... / ...
CommitLineData
1/* FCE Ultra - NES/Famicom Emulator
2 *
3 * Copyright notice for this file:
4 * Copyright (C) 1998 BERO
5 * Copyright (C) 2002 Ben Parnell
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include "mapinc.h"
23
24
25
26
27DECLFW(Mapper15_write)
28{
29switch(A)
30 {
31 case 0x8000:
32 if(V&0x80)
33 {
34 ROM_BANK8(0x8000,(V<<1)+1);
35 ROM_BANK8(0xA000,(V<<1));
36 ROM_BANK8(0xC000,(V<<1)+2);
37 ROM_BANK8(0xE000,(V<<1)+1);
38 }
39 else
40 {
41 ROM_BANK16(0x8000,V);
42 ROM_BANK16(0xC000,V+1);
43 }
44 MIRROR_SET((V>>6)&1);
45 X6502_Rebase();
46 break;
47 case 0x8001:
48 MIRROR_SET(0);
49 ROM_BANK16(0x8000,V);
50 ROM_BANK16(0xc000,~0);
51 X6502_Rebase();
52 break;
53 case 0x8002:
54 if(V&0x80)
55 {
56 ROM_BANK8(0x8000,((V<<1)+1));
57 ROM_BANK8(0xA000,((V<<1)+1));
58 ROM_BANK8(0xC000,((V<<1)+1));
59 ROM_BANK8(0xE000,((V<<1)+1));
60 }
61 else
62 {
63 ROM_BANK8(0x8000,(V<<1));
64 ROM_BANK8(0xA000,(V<<1));
65 ROM_BANK8(0xC000,(V<<1));
66 ROM_BANK8(0xE000,(V<<1));
67 }
68 X6502_Rebase();
69 break;
70 case 0x8003:
71 MIRROR_SET((V>>6)&1);
72 if(V&0x80)
73 {
74 ROM_BANK8(0xC000,(V<<1)+1);
75 ROM_BANK8(0xE000,(V<<1));
76 }
77 else
78 {
79 ROM_BANK16(0xC000,V);
80 }
81 X6502_Rebase();
82 break;
83 }
84}
85
86void Mapper15_init(void)
87{
88 ROM_BANK32(0);
89 SetWriteHandler(0x8000,0xFFFF,Mapper15_write);
90}
91