X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=boards%2Fghostbusters63in1.c;fp=boards%2Fghostbusters63in1.c;h=627f16da1d5670d12cfff5a00592045366b302f0;hp=0000000000000000000000000000000000000000;hb=386f5371eb984fb9c2860c83e740890a75cd45c1;hpb=eec2623f6183dd0f9494b99065a16bf90f2a1ccf diff --git a/boards/ghostbusters63in1.c b/boards/ghostbusters63in1.c new file mode 100644 index 0000000..627f16d --- /dev/null +++ b/boards/ghostbusters63in1.c @@ -0,0 +1,106 @@ +/* FCE Ultra - NES/Famicom Emulator + * + * Copyright notice for this file: + * Copyright (C) 2007 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 + * 63in1 ghostbusters + */ + +#include "mapinc.h" + +static uint8 reg[2], bank; +static uint8 banks[4] = {0, 0, 1, 2}; +static uint8 *CHRROM=NULL; +static uint32 CHRROMSIZE; + +static SFORMAT StateRegs[]= +{ + {reg, 2, "REGS"}, + {&bank, 1, "BANK"}, + {0} +}; + +static void Sync(void) +{ + if(reg[0]&0x20) + { + setprg16r(banks[bank],0x8000,reg[0]&0x1F); + setprg16r(banks[bank],0xC000,reg[0]&0x1F); + } + else + setprg32r(banks[bank],0x8000,(reg[0]>>1)&0x0F); + if(reg[1]&2) + setchr8r(0x10,0); + else + setchr8(0); + setmirror((reg[0]&0x40)>>6); +} + +static DECLFW(BMCGhostbusters63in1Write) +{ + reg[A&1]=V; + bank=((reg[0]&0x80)>>7)|((reg[1]&1)<<1); +// FCEU_printf("reg[0]=%02x, reg[1]=%02x, bank=%02x\n",reg[0],reg[1],bank); + Sync(); +} + +static DECLFR(BMCGhostbusters63in1Read) +{ + if(bank==1) + return X.DB; + else + return CartBR(A); +} + +static void BMCGhostbusters63in1Power(void) +{ + reg[0]=reg[1]=0; + Sync(); + SetReadHandler(0x8000,0xFFFF,BMCGhostbusters63in1Read); + SetWriteHandler(0x8000,0xFFFF,BMCGhostbusters63in1Write); +} + +static void BMCGhostbusters63in1Reset(void) +{ + reg[0]=reg[1]=0; +} + +static void StateRestore(int version) +{ + Sync(); +} + +static void BMCGhostbusters63in1Close(void) +{ + if(CHRROM) + FCEU_gfree(CHRROM); + CHRROM=NULL; +} + +void BMCGhostbusters63in1_Init(CartInfo *info) +{ + info->Reset=BMCGhostbusters63in1Reset; + info->Power=BMCGhostbusters63in1Power; + info->Close=BMCGhostbusters63in1Close; + + CHRROMSIZE=8192; // dummy CHRROM, VRAM disable + CHRROM=(uint8*)FCEU_gmalloc(CHRROMSIZE); + SetupCartPRGMapping(0x10,CHRROM,CHRROMSIZE,0); + AddExState(CHRROM, CHRROMSIZE, 0, "CHRROM"); + + GameStateRestore=StateRestore; + AddExState(&StateRegs, ~0, 0, 0); +}