| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 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 | |
| 24 | #define dbarray mapbyte1 |
| 25 | static void FP_FASTAPASS(1) dragonbust_ppu(uint32 A) |
| 26 | { |
| 27 | static int last=-1; |
| 28 | static uint8 z; |
| 29 | |
| 30 | if(A>=0x2000) return; |
| 31 | |
| 32 | A>>=13; |
| 33 | |
| 34 | z=dbarray[A]; |
| 35 | |
| 36 | if(z!=last) |
| 37 | { |
| 38 | onemir(z); |
| 39 | last=z; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | |
| 44 | DECLFW(Mapper95_write) |
| 45 | { |
| 46 | switch(A&0xF001){ |
| 47 | |
| 48 | case 0x8000: |
| 49 | MMC3_cmd = V; |
| 50 | break; |
| 51 | |
| 52 | case 0x8001: |
| 53 | switch(MMC3_cmd&7){ |
| 54 | case 0: dbarray[0]=dbarray[1]=(V&0x20)>>4;onemir((V&0x20)>>4);V>>=1;VROM_BANK2(0x0000,V);break; |
| 55 | case 1: dbarray[2]=dbarray[3]=(V&0x20)>>4;onemir((V&0x20)>>4);V>>=1;VROM_BANK2(0x0800,V);break; |
| 56 | case 2: dbarray[4]=(V&0x20)>>4;onemir((V&0x20)>>4);VROM_BANK1(0x1000,V); break; |
| 57 | case 3: dbarray[5]=(V&0x20)>>4;onemir((V&0x20)>>4);VROM_BANK1(0x1400,V); break; |
| 58 | case 4: dbarray[6]=(V&0x20)>>4;onemir((V&0x20)>>4);VROM_BANK1(0x1800,V); break; |
| 59 | case 5: dbarray[7]=(V&0x20)>>4;onemir((V&0x20)>>4);VROM_BANK1(0x1C00,V); break; |
| 60 | case 6: |
| 61 | ROM_BANK8(0x8000,V); |
| 62 | break; |
| 63 | case 7: |
| 64 | ROM_BANK8(0xA000,V); |
| 65 | break; |
| 66 | } |
| 67 | break; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | void Mapper95_init(void) |
| 72 | { |
| 73 | SetWriteHandler(0x8000,0xffff,Mapper95_write); |
| 74 | PPU_hook=dragonbust_ppu; |
| 75 | } |
| 76 | |