1 /* FCE Ultra - NES/Famicom Emulator
3 * Copyright notice for this file:
4 * Copyright (C) 2002 Ben Parnell
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.
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.
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
23 void FP_FASTAPASS(1) m83IRQHook(int a)
47 static void m83prg(void)
49 ROM_BANK16(0x8000,mapbyte1[0]&0x3F);
50 ROM_BANK16(0xC000,(mapbyte1[0]&0x30)|0xF);
53 static void m83chr(void)
57 VROM_BANK1(x*0x400,mapbyte2[x]|((mapbyte1[0]&0x30)<<4));
60 static DECLFW(Mapper83_write)
62 //printf("$%04x:$%02x\n",A,V);
78 case 0x00:MIRROR_SET2(1);break;
79 case 0x01:MIRROR_SET2(0);break;
80 case 0x02:onemir(0);break;
81 case 0x03:onemir(1);break;
84 case 0x8200:IRQCount&=0xFF00;IRQCount|=V;break;
85 case 0x8201:IRQa=1;IRQCount&=0xFF;IRQCount|=V<<8;break;
86 //case 0x8300:ROM_BANK8(0x8000,V);break;
87 //case 0x8301:ROM_BANK8(0xA000,V);break;
88 //case 0x8302:ROM_BANK8(0xC000,V);break;
89 case 0x8310:mapbyte2[0]=V;m83chr();break;
90 case 0x8311:mapbyte2[1]=V;m83chr();break;
91 case 0x8312:mapbyte2[2]=V;m83chr();break;
92 case 0x8313:mapbyte2[3]=V;m83chr();break;
93 case 0x8314:mapbyte2[4]=V;m83chr();break;
94 case 0x8315:mapbyte2[5]=V;m83chr();break;
95 case 0x8316:mapbyte2[6]=V;m83chr();break;
96 case 0x8317:mapbyte2[7]=V;m83chr();break;
98 // printf("$%04x:$%02x, $%04x\n",A,V,X.PC.W);
102 void Mapper83_init(void)
105 ROM_BANK8(0xc000,0x1e);
106 ROM_BANK8(0xe000,0x1f);
108 MapIRQHook=m83IRQHook;
110 SetReadHandler(0x5100,0x5103,rdlow);
111 SetWriteHandler(0x5100,0x5103,wrlow);
112 SetWriteHandler(0x8000,0xffff,Mapper83_write);