| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Xodnizel |
| 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 | |
| 23 | static int is48; |
| 24 | |
| 25 | static DECLFW(Mapper33_write) |
| 26 | { |
| 27 | //printf("%04x:%02x, %d\n",A,V,scanline); |
| 28 | |
| 29 | A&=0xF003; |
| 30 | if(A>=0xA000 && A<=0xA003) |
| 31 | VROM_BANK1(0x1000+((A&3)<<10),V); |
| 32 | else switch(A) |
| 33 | { |
| 34 | case 0x8000:if(!is48) MIRROR_SET((V>>6)&1); |
| 35 | ROM_BANK8(0x8000,V); |
| 36 | break; |
| 37 | case 0x8001:ROM_BANK8(0xA000,V); break; |
| 38 | case 0x8002:VROM_BANK2(0x0000,V);break; |
| 39 | case 0x8003:VROM_BANK2(0x0800,V);break; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | static DECLFW(Mapper48_HiWrite) |
| 44 | { |
| 45 | switch(A&0xF003) |
| 46 | { |
| 47 | case 0xc000:IRQLatch=V;break; |
| 48 | case 0xc001:IRQCount=IRQLatch;break; |
| 49 | case 0xc003:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break; |
| 50 | case 0xc002:IRQa=1;break; |
| 51 | case 0xe000:MIRROR_SET((V>>6)&1);break; |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | static void heho(void) |
| 56 | { |
| 57 | if(IRQa) |
| 58 | { |
| 59 | IRQCount++; |
| 60 | if(IRQCount==0x100) |
| 61 | { |
| 62 | X6502_IRQBegin(FCEU_IQEXT); |
| 63 | IRQa=0; |
| 64 | } |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | void Mapper33_init(void) |
| 69 | { |
| 70 | SetWriteHandler(0x8000,0xffff,Mapper33_write); |
| 71 | is48=0; |
| 72 | } |
| 73 | |
| 74 | void Mapper48_init(void) |
| 75 | { |
| 76 | SetWriteHandler(0x8000,0xffff,Mapper33_write); |
| 77 | SetWriteHandler(0xc000,0xffff,Mapper48_HiWrite); |
| 78 | GameHBIRQHook=heho; |
| 79 | is48=1; |
| 80 | } |