| e2d0dd92 |
1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2005 CaH4e3 |
| 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 uint8 is_large_banks; |
| 24 | static uint8 large_bank; |
| 25 | static uint8 prg_bank; |
| 26 | static uint8 chr_bank; |
| 27 | static uint8 bank_mode; |
| 28 | static uint8 mirroring; |
| 29 | static SFORMAT StateRegs[]= |
| 30 | { |
| 31 | {&large_bank, 1, "LB"}, |
| 32 | {&prg_bank, 1, "PRG"}, |
| 33 | {&chr_bank, 1, "CHR"}, |
| 34 | {&bank_mode, 1, "BM"}, |
| 35 | {&mirroring, 1, "MIRR"}, |
| 36 | {0} |
| 37 | }; |
| 38 | |
| 39 | static void Sync(void) |
| 40 | { |
| 41 | switch (bank_mode) |
| 42 | { |
| 43 | case 0x00: |
| 44 | case 0x10: setprg16(0x8000,large_bank|prg_bank); |
| 45 | setprg16(0xC000,large_bank|7); |
| 46 | break; |
| 47 | case 0x20: setprg32(0x8000,(large_bank|prg_bank)>>1); |
| 48 | break; |
| 49 | case 0x30: setprg16(0x8000,large_bank|prg_bank); |
| 50 | setprg16(0xC000,large_bank|prg_bank); |
| 51 | break; |
| 52 | } |
| 53 | setmirror(mirroring); |
| 54 | if(!is_large_banks) |
| 55 | setchr8(chr_bank); |
| 56 | } |
| 57 | |
| 58 | static DECLFR(BMC70in1Read) |
| 59 | { |
| 60 | if(bank_mode==0x10) |
| 61 | if(is_large_banks) |
| 62 | return CartBR((A&0xFFF0)|0x06); |
| 63 | else |
| 64 | return CartBR((A&0xFFF0)|0x0d); |
| 65 | else |
| 66 | return CartBR(A); |
| 67 | } |
| 68 | |
| 69 | static DECLFW(BMC70in1Write) |
| 70 | { |
| 71 | if(A&0x4000) |
| 72 | { |
| 73 | bank_mode=A&0x30; |
| 74 | prg_bank=A&7; |
| 75 | } |
| 76 | else |
| 77 | { |
| 78 | mirroring=((A&0x20)>>5)^1; |
| 79 | if(is_large_banks) |
| 80 | large_bank=(A&3)<<3; |
| 81 | else |
| 82 | chr_bank=A&7; |
| 83 | } |
| 84 | Sync(); |
| 85 | } |
| 86 | |
| 87 | static void BMC70in1Power(void) |
| 88 | { |
| 89 | setchr8(0); |
| 90 | bank_mode=0; |
| 91 | large_bank=0; |
| 92 | Sync(); |
| 93 | SetReadHandler(0x8000,0xFFFF,BMC70in1Read); |
| 94 | SetWriteHandler(0x8000,0xffff,BMC70in1Write); |
| 95 | } |
| 96 | |
| 97 | static void StateRestore(int version) |
| 98 | { |
| 99 | Sync(); |
| 100 | } |
| 101 | |
| 102 | void BMC70in1_Init(CartInfo *info) |
| 103 | { |
| 104 | is_large_banks=0; |
| 105 | info->Power=BMC70in1Power; |
| 106 | GameStateRestore=StateRestore; |
| 107 | AddExState(&StateRegs, ~0, 0, 0); |
| 108 | } |
| 109 | |
| 110 | void BMC70in1B_Init(CartInfo *info) |
| 111 | { |
| 112 | is_large_banks=1; |
| 113 | info->Power=BMC70in1Power; |
| 114 | GameStateRestore=StateRestore; |
| 115 | AddExState(&StateRegs, ~0, 0, 0); |
| 116 | } |
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