X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=boards%2F34.c;fp=boards%2F34.c;h=a357506fbc953b448c5ae612a1e4a6f74d4236f2;hp=0000000000000000000000000000000000000000;hb=43725da7349c85fa13e828fdbf20cc7ac8d298d6;hpb=386f5371eb984fb9c2860c83e740890a75cd45c1 diff --git a/boards/34.c b/boards/34.c new file mode 100644 index 0000000..a357506 --- /dev/null +++ b/boards/34.c @@ -0,0 +1,98 @@ +/* FCE Ultra - NES/Famicom Emulator + * + * Copyright notice for this file: + * Copyright (C) 2012 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 + * + * Many-in-one hacked mapper crap. + * + * Original BNROM is actually AxROM variations without mirroring control, + * and haven't SRAM on-board, so it must be removed from here + * + * Difficult banking is what NINA board doing, most hacks for 34 mapper are + * NINA hacks, so this is actually 34 mapper + * + */ + +#include "mapinc.h" + +static uint8 regs[3]; +static uint8 *WRAM=NULL; +static uint32 WRAMSIZE; + +static SFORMAT StateRegs[]= +{ + {regs, 3, "REGS"}, + {0} +}; + +static void Sync(void) +{ + setprg8r(0x10,0x6000,0); + setprg32(0x8000,regs[0]); + setchr4(0x0000,regs[1]); + setchr4(0x1000,regs[2]); +} + +static DECLFW(M34Write) +{ + if(A>=0x8000) + regs[0] = V; + else + switch(A) + { + case 0x7ffd: regs[0] = V; break; + case 0x7ffe: regs[1] = V; break; + case 0x7fff: regs[2] = V; break; + } + Sync(); +} + +static void M34Power(void) +{ + regs[0] = 0; + Sync(); + SetReadHandler(0x6000,0x7ffc,CartBR); + SetWriteHandler(0x6000,0x7ffc,CartBW); + SetReadHandler(0x8000,0xffff,CartBR); + SetWriteHandler(0x7ffd,0xffff,M34Write); +} + +static void M34Close(void) +{ + if(WRAM) + FCEU_gfree(WRAM); + WRAM=NULL; +} + +static void StateRestore(int version) +{ + Sync(); +} + +void Mapper34_Init(CartInfo *info) +{ + info->Power=M34Power; + info->Close=M34Close; + GameStateRestore=StateRestore; + + WRAMSIZE=8192; + WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE); + SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1); + AddExState(WRAM, WRAMSIZE, 0, "WRAM"); + + AddExState(&StateRegs, ~0, 0, 0); +}