mapper fixes for ncpu, debug is broken atm
[fceu.git] / mappers / 15.c
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
27 DECLFW(Mapper15_write)
28 {
29 switch(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
86 void Mapper15_init(void)
87 {
88         ROM_BANK32(0);
89         SetWriteHandler(0x8000,0xFFFF,Mapper15_write);
90 }
91