| 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "mapinc.h" |
| 22 | |
| 23 | static uint8 reg[8]; |
| 24 | static uint8 mirror, cmd, is154; |
| 25 | |
| 26 | static SFORMAT StateRegs[]= |
| 27 | { |
| 28 | {&cmd, 1, "CMD"}, |
| 29 | {&mirror, 1, "MIRR"}, |
| 30 | {reg, 8, "REGS"}, |
| 31 | {0} |
| 32 | }; |
| 33 | |
| 34 | static void Sync(void) |
| 35 | { |
| 36 | setchr2(0x0000,reg[0]>>1); |
| 37 | setchr2(0x0800,reg[1]>>1); |
| 38 | setchr1(0x1000,reg[2]|0x40); |
| 39 | setchr1(0x1400,reg[3]|0x40); |
| 40 | setchr1(0x1800,reg[4]|0x40); |
| 41 | setchr1(0x1C00,reg[5]|0x40); |
| 42 | setprg8(0x8000,reg[6]); |
| 43 | setprg8(0xA000,reg[7]); |
| 44 | } |
| 45 | |
| 46 | static void MSync(void) |
| 47 | { |
| 48 | if(is154)setmirror(MI_0+(mirror&1)); |
| 49 | } |
| 50 | |
| 51 | static DECLFW(M88Write) |
| 52 | { |
| 53 | switch(A&0x8001) |
| 54 | { |
| 55 | case 0x8000: cmd=V&7; mirror=V>>6; MSync(); break; |
| 56 | case 0x8001: reg[cmd]=V; Sync(); break; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static void M88Power(void) |
| 61 | { |
| 62 | setprg16(0xC000,~0); |
| 63 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 64 | SetWriteHandler(0x8000,0xFFFF,M88Write); |
| 65 | } |
| 66 | |
| 67 | static void StateRestore(int version) |
| 68 | { |
| 69 | Sync(); |
| 70 | MSync(); |
| 71 | } |
| 72 | |
| 73 | void Mapper88_Init(CartInfo *info) |
| 74 | { |
| 75 | is154=0; |
| 76 | info->Power=M88Power; |
| 77 | GameStateRestore=StateRestore; |
| 78 | AddExState(&StateRegs, ~0, 0, 0); |
| 79 | } |
| 80 | |
| 81 | void Mapper154_Init(CartInfo *info) |
| 82 | { |
| 83 | is154=1; |
| 84 | info->Power=M88Power; |
| 85 | GameStateRestore=StateRestore; |
| 86 | AddExState(&StateRegs, ~0, 0, 0); |
| 87 | } |