1 /* FCE Ultra - NES/Famicom Emulator
3 * Copyright notice for this file:
4 * Copyright (C) 1998 BERO
5 * Copyright (C) 2002 Ben Parnell
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.
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.
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
24 static void FP_FASTAPASS(1) BandaiIRQHook(int a)
31 X6502_IRQBegin(FCEU_IQEXT);
32 //printf("IRQ: %d, %d\n",scanline,timestamp);
39 static DECLFW(Mapper16_write)
48 case 0x9: switch(V&3) {
49 case 0x00:MIRROR_SET2(1);break;
50 case 0x01:MIRROR_SET2(0);break;
51 case 0x02:onemir(0);break;
52 case 0x03:onemir(1);break;
55 case 0xA:X6502_IRQEnd(FCEU_IQEXT);
59 case 0xB:IRQLatch&=0xFF00;
62 case 0xC:IRQLatch&=0xFF;
65 case 0xD: break;/* Serial EEPROM control port */
70 // 0-7: Lower bit of data selects which 256KB PRG block is in use.
71 // This seems to be a hack on the developers' part, so I'll make emulation
72 // of it a hack(I think the current PRG block would depend on whatever the
73 // lowest bit of the CHR bank switching register that corresponds to the
74 // last CHR address read).
76 static void PRGO(void)
78 uint32 base=(mapbyte1[0]&1)<<4;
79 ROM_BANK16(0x8000,(mapbyte2[0]&0xF)|base);
80 ROM_BANK16(0xC000,base|0xF);
83 static DECLFW(Mapper153_write)
97 case 0x9: switch(V&3) {
98 case 0x00:MIRROR_SET2(1);break;
99 case 0x01:MIRROR_SET2(0);break;
100 case 0x02:onemir(0);break;
101 case 0x03:onemir(1);break;
104 case 0xA:X6502_IRQEnd(FCEU_IQEXT);
108 case 0xB:IRQLatch&=0xFF00;
111 case 0xC:IRQLatch&=0xFF;
117 void Mapper16_init(void)
119 MapIRQHook=BandaiIRQHook;
120 SetWriteHandler(0x6000,0xFFFF,Mapper16_write);
123 void Mapper153_init(void)
125 MapIRQHook=BandaiIRQHook;
126 SetWriteHandler(0x8000,0xFFFF,Mapper153_write);
127 /* This mapper/board seems to have WRAM at $6000-$7FFF, so I'll let the
128 main ines code take care of that memory region. */