| 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 uint32 lastA; |
| 24 | static int isfu; |
| 25 | static uint8 CCache[8]; |
| 26 | |
| 27 | static void FP_FASTAPASS(1) Fudou_PPU(uint32 A) |
| 28 | { |
| 29 | static int last=-1; |
| 30 | static uint8 z; |
| 31 | |
| 32 | if(A>=0x2000) return; |
| 33 | |
| 34 | A>>=10; |
| 35 | lastA=A; |
| 36 | |
| 37 | z=CCache[A]; |
| 38 | if(z!=last) |
| 39 | { |
| 40 | onemir(z); |
| 41 | last=z; |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | static void mira() |
| 46 | { |
| 47 | if(isfu) |
| 48 | { |
| 49 | int x; |
| 50 | CCache[0]=CCache[1]=mapbyte2[0]>>7; |
| 51 | CCache[2]=CCache[3]=mapbyte2[1]>>7; |
| 52 | |
| 53 | for(x=0;x<4;x++) |
| 54 | CCache[4+x]=mapbyte2[2+x]>>7; |
| 55 | |
| 56 | onemir(CCache[lastA]); |
| 57 | } |
| 58 | else |
| 59 | MIRROR_SET2(mapbyte1[0]&1); |
| 60 | } |
| 61 | |
| 62 | static DECLFW(Mapper80_write) |
| 63 | { |
| 64 | switch(A) |
| 65 | { |
| 66 | case 0x7ef0: mapbyte2[0]=V;VROM_BANK2(0x0000,(V>>1)&0x3F);mira();break; |
| 67 | case 0x7ef1: mapbyte2[1]=V;VROM_BANK2(0x0800,(V>>1)&0x3f);mira();break; |
| 68 | |
| 69 | case 0x7ef2: mapbyte2[2]=V;VROM_BANK1(0x1000,V);mira();break; |
| 70 | case 0x7ef3: mapbyte2[3]=V;VROM_BANK1(0x1400,V);mira();break; |
| 71 | case 0x7ef4: mapbyte2[4]=V;VROM_BANK1(0x1800,V);mira();break; |
| 72 | case 0x7ef5: mapbyte2[5]=V;VROM_BANK1(0x1c00,V);mira();break; |
| 73 | case 0x7ef6: mapbyte1[0]=V;mira();break; |
| 74 | case 0x7efa: |
| 75 | case 0x7efb: ROM_BANK8(0x8000,V);break; |
| 76 | case 0x7efd: |
| 77 | case 0x7efc: ROM_BANK8(0xA000,V);break; |
| 78 | case 0x7efe: |
| 79 | case 0x7eff: ROM_BANK8(0xC000,V);break; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | static void booga(int version) |
| 84 | { |
| 85 | mira(); |
| 86 | } |
| 87 | |
| 88 | void Mapper80_init(void) |
| 89 | { |
| 90 | SetWriteHandler(0x4020,0x7eff,Mapper80_write);// 7f00-7fff battery backed ram inside mapper chip, |
| 91 | // controlled by 7ef8 register, A8 - enable, FF - disable (?) |
| 92 | MapStateRestore=booga; |
| 93 | isfu=0; |
| 94 | } |
| 95 | |
| 96 | void Mapper207_init(void) |
| 97 | { |
| 98 | Mapper80_init(); |
| 99 | isfu=1; |
| 100 | PPU_hook=Fudou_PPU; |
| 101 | } |