X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=boards%2F8157.c;fp=boards%2F8157.c;h=1b23023722e87bda3e6d77235f1afbda364df9dc;hp=2aa3f4e8635df84e8f335e4d08e63fcad6558322;hb=386f5371eb984fb9c2860c83e740890a75cd45c1;hpb=eec2623f6183dd0f9494b99065a16bf90f2a1ccf diff --git a/boards/8157.c b/boards/8157.c index 2aa3f4e..1b23023 100644 --- a/boards/8157.c +++ b/boards/8157.c @@ -1,80 +1,81 @@ -/* FCE Ultra - NES/Famicom Emulator - * - * Copyright notice for this file: - * Copyright (C) 2005 CaH4e3 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "mapinc.h" - -static uint16 cmdreg; -static uint8 invalid_data; -static SFORMAT StateRegs[]= -{ - {&cmdreg, 2, "CMDREG"}, - {0} -}; - -static void Sync(void) -{ - setprg16r((cmdreg&0x060)>>5,0x8000,(cmdreg&0x01C)>>2); - setprg16r((cmdreg&0x060)>>5,0xC000,(cmdreg&0x200)?(~0):0); - setmirror(((cmdreg&2)>>1)^1); -} - -static DECLFR(UNL8157Read) -{ - if(invalid_data&&cmdreg&0x100) - return 0xFF; - else - return CartBR(A); -} - -static DECLFW(UNL8157Write) -{ - cmdreg=A; - Sync(); -} - -static void UNL8157Power(void) -{ - setchr8(0); - SetWriteHandler(0x8000,0xFFFF,UNL8157Write); - SetReadHandler(0x8000,0xFFFF,UNL8157Read); - cmdreg=0x200; - invalid_data=1; - Sync(); -} - -static void UNL8157Reset(void) -{ - cmdreg=0; - invalid_data^=1; - Sync(); -} - -static void UNL8157Restore(int version) -{ - Sync(); -} - -void UNL8157_Init(CartInfo *info) -{ - info->Power=UNL8157Power; - info->Reset=UNL8157Reset; - GameStateRestore=UNL8157Restore; - AddExState(&StateRegs, ~0, 0, 0); -} +/* FCE Ultra - NES/Famicom Emulator + * + * Copyright notice for this file: + * Copyright (C) 2005 CaH4e3 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "mapinc.h" + +static uint16 cmdreg; +static uint8 invalid_data; +static SFORMAT StateRegs[]= +{ + {&invalid_data, 1, "INVD"}, + {&cmdreg, 2, "CMDREG"}, + {0} +}; + +static void Sync(void) +{ + setprg16r((cmdreg&0x060)>>5,0x8000,(cmdreg&0x01C)>>2); + setprg16r((cmdreg&0x060)>>5,0xC000,(cmdreg&0x200)?(~0):0); + setmirror(((cmdreg&2)>>1)^1); +} + +static DECLFR(UNL8157Read) +{ + if(invalid_data&&cmdreg&0x100) + return 0xFF; + else + return CartBR(A); +} + +static DECLFW(UNL8157Write) +{ + cmdreg=A; + Sync(); +} + +static void UNL8157Power(void) +{ + setchr8(0); + SetWriteHandler(0x8000,0xFFFF,UNL8157Write); + SetReadHandler(0x8000,0xFFFF,UNL8157Read); + cmdreg=0x200; + invalid_data=1; + Sync(); +} + +static void UNL8157Reset(void) +{ + cmdreg=0; + invalid_data^=1; + Sync(); +} + +static void UNL8157Restore(int version) +{ + Sync(); +} + +void UNL8157_Init(CartInfo *info) +{ + info->Power=UNL8157Power; + info->Reset=UNL8157Reset; + GameStateRestore=UNL8157Restore; + AddExState(&StateRegs, ~0, 0, 0); +}