| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Xodnizel 2006 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 cmd, laststrobe, trigger; |
| 24 | static uint8 DRegs[8]; |
| 25 | static SFORMAT StateRegs[]= |
| 26 | { |
| 27 | {&cmd, 1, "CMD"}, |
| 28 | {&laststrobe, 1, "STB"}, |
| 29 | {&trigger, 1, "TRG"}, |
| 30 | {DRegs, 8, "DREG"}, |
| 31 | {0} |
| 32 | }; |
| 33 | |
| 34 | static void Sync(void) |
| 35 | { |
| 36 | setprg32(0x8000,(DRegs[0]<<4)|(DRegs[1]&0xF)); |
| 37 | } |
| 38 | |
| 39 | static void StateRestore(int version) |
| 40 | { |
| 41 | Sync(); |
| 42 | } |
| 43 | |
| 44 | static DECLFR(ReadLow) |
| 45 | { |
| 46 | switch (A&0x7700) |
| 47 | { |
| 48 | case 0x5100: return DRegs[2]; break; |
| 49 | case 0x5500: if(trigger) |
| 50 | return DRegs[2]; |
| 51 | else |
| 52 | return 0; |
| 53 | } |
| 54 | return 4; |
| 55 | } |
| 56 | |
| 57 | static DECLFW(Write) |
| 58 | { |
| 59 | switch (A&0x7300) |
| 60 | { |
| 61 | case 0x5100: DRegs[0]=V; Sync(); break; |
| 62 | case 0x5000: DRegs[1]=V; Sync(); break; |
| 63 | case 0x5300: DRegs[2]=V; break; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | static DECLFW(Write2) |
| 68 | { |
| 69 | if(A==0x5101) |
| 70 | { |
| 71 | if(laststrobe&&!V) |
| 72 | { |
| 73 | trigger^=1; |
| 74 | } |
| 75 | laststrobe=V; |
| 76 | }else if(A==0x5100&&V==6) //damn thoose protected games |
| 77 | setprg32(0x8000,3); |
| 78 | else |
| 79 | switch (A&0x7300) |
| 80 | { |
| 81 | case 0x5200: DRegs[0]=V; Sync(); break; |
| 82 | case 0x5000: DRegs[1]=V; Sync(); if(!(DRegs[1]&0x80)&&(scanline<128)) setchr8(0); break; |
| 83 | case 0x5300: DRegs[2]=V; break; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | static uint8 WRAM[8192]; |
| 88 | static DECLFR(AWRAM) |
| 89 | { |
| 90 | return(WRAM[A-0x6000]); |
| 91 | } |
| 92 | |
| 93 | static DECLFW(BWRAM) |
| 94 | { |
| 95 | WRAM[A-0x6000]=V; |
| 96 | } |
| 97 | |
| 98 | static void Power(void) |
| 99 | { |
| 100 | memset(DRegs,0,8); |
| 101 | DRegs[1]=0xFF; |
| 102 | cmd=0; |
| 103 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 104 | SetWriteHandler(0x4020,0x5FFF,Write); |
| 105 | SetReadHandler(0x6000,0x7FFF,AWRAM); |
| 106 | SetWriteHandler(0x6000,0x7FFF,BWRAM); |
| 107 | setchr8(0); |
| 108 | Sync(); |
| 109 | } |
| 110 | |
| 111 | static void M163HB(void) |
| 112 | { |
| 113 | if(DRegs[1]&0x80) |
| 114 | { |
| 115 | if(scanline==239) |
| 116 | { |
| 117 | setchr4(0x0000,0); |
| 118 | setchr4(0x1000,0); |
| 119 | } |
| 120 | else if(scanline==127) |
| 121 | { |
| 122 | setchr4(0x0000,1); |
| 123 | setchr4(0x1000,1); |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | static void Power2(void) |
| 129 | { |
| 130 | memset(DRegs,0,8); |
| 131 | DRegs[1]=0xFF; |
| 132 | laststrobe=1; |
| 133 | cmd=0; |
| 134 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 135 | SetWriteHandler(0x4020,0x5FFF,Write2); |
| 136 | SetReadHandler(0x6000,0x7FFF,AWRAM); |
| 137 | SetWriteHandler(0x6000,0x7FFF,BWRAM); |
| 138 | SetReadHandler(0x5000,0x5FFF,ReadLow); |
| 139 | setchr8(0); |
| 140 | Sync(); |
| 141 | } |
| 142 | |
| 143 | void Mapper164_Init(CartInfo *info) |
| 144 | { |
| 145 | info->Power=Power; |
| 146 | GameStateRestore=StateRestore; |
| 147 | AddExState(&StateRegs, ~0, 0, 0); |
| 148 | AddExState(WRAM, 8192, 0, "WRAM"); |
| 149 | info->SaveGame[0]=WRAM;\r |
| 150 | info->SaveGameLen[0]=8192; |
| 151 | } |
| 152 | |
| 153 | void Mapper163_Init(CartInfo *info) |
| 154 | { |
| 155 | info->Power=Power2; |
| 156 | GameHBIRQHook=M163HB; |
| 157 | GameStateRestore=StateRestore; |
| 158 | AddExState(&StateRegs, ~0, 0, 0); |
| 159 | AddExState(WRAM, 8192, 0, "WRAM"); |
| 160 | } |