| 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 | #define rg mapbyte1 |
| 24 | static void DoPRG(void) |
| 25 | { |
| 26 | int32 b=((rg[0]>>1)&0xF) | ((rg[0]>>3)&0x10) | ((rg[1]&1)<<5); |
| 27 | if(rg[0]&0x20) // 16 KB |
| 28 | { |
| 29 | ROM_BANK16(0x8000,(b<<1)|(rg[0]&1)); |
| 30 | ROM_BANK16(0xC000,(b<<1)|(rg[0]&1)); |
| 31 | } |
| 32 | else |
| 33 | ROM_BANK32(b); |
| 34 | X6502_Rebase(); |
| 35 | } |
| 36 | |
| 37 | static DECLFW(Mapper226_write) |
| 38 | { |
| 39 | rg[A&1]=V; |
| 40 | DoPRG(); |
| 41 | if(A&1) |
| 42 | { |
| 43 | if(rg[1]&2) |
| 44 | PPUCHRRAM=0; // Write protected. |
| 45 | else |
| 46 | PPUCHRRAM=0xFF; // Not write protected. |
| 47 | } |
| 48 | else |
| 49 | MIRROR_SET2((rg[0]>>6)&1); |
| 50 | } |
| 51 | |
| 52 | static void M26Reset(void) |
| 53 | { |
| 54 | rg[0]=rg[1]=0; |
| 55 | DoPRG(); |
| 56 | PPUCHRRAM=0xFF; |
| 57 | MIRROR_SET2(0); |
| 58 | } |
| 59 | |
| 60 | static void M26Restore(int version) |
| 61 | { |
| 62 | DoPRG(); |
| 63 | if(rg[1]&2) |
| 64 | PPUCHRRAM=0; // Write protected. |
| 65 | else |
| 66 | PPUCHRRAM=0xFF; // Not write protected. |
| 67 | MIRROR_SET2((rg[0]>>6)&1); |
| 68 | } |
| 69 | |
| 70 | void Mapper226_init(void) |
| 71 | { |
| 72 | SetWriteHandler(0x8000,0xffff,Mapper226_write); |
| 73 | MapperReset=M26Reset; |
| 74 | GameStateRestore=M26Restore; |
| 75 | M26Reset(); |
| 76 | } |
| 77 | |
| 78 | #ifdef OLD // What the heck is this?? |
| 79 | DECLFW(Mapper226_write) |
| 80 | { |
| 81 | MIRROR_SET((A>>13)&1); |
| 82 | VROM_BANK8(A&0x7F); |
| 83 | if(A&0x1000) |
| 84 | { |
| 85 | if(A&0x40) |
| 86 | { |
| 87 | ROM_BANK16(0x8000,(((A>>7))<<1)+1); |
| 88 | ROM_BANK16(0xC000,(((A>>7))<<1)+1); |
| 89 | } |
| 90 | else |
| 91 | { |
| 92 | ROM_BANK16(0x8000,(((A>>7))<<1)); |
| 93 | ROM_BANK16(0xC000,(((A>>7))<<1)); |
| 94 | } |
| 95 | } |
| 96 | else |
| 97 | { |
| 98 | ROM_BANK32(A>>7); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | void Mapper226_init(void) |
| 103 | { |
| 104 | SetWriteHandler(0x8000,0xffff,Mapper226_write); |
| 105 | } |
| 106 | #endif |