X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=boards%2Fa9746.c;fp=boards%2Fa9746.c;h=35223369615ef9165c60027feba7eed3a445ae3c;hp=0000000000000000000000000000000000000000;hb=386f5371eb984fb9c2860c83e740890a75cd45c1;hpb=eec2623f6183dd0f9494b99065a16bf90f2a1ccf diff --git a/boards/a9746.c b/boards/a9746.c new file mode 100644 index 0000000..3522336 --- /dev/null +++ b/boards/a9746.c @@ -0,0 +1,186 @@ + +/* 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 + */ +/* +#include "mapinc.h" + +static uint8 chr_cmd, prg_cmd, mirror; +static uint8 chr_reg[6], prg_reg[4]; + +static SFORMAT StateRegs[]= +{ + {&chr_cmd, 1, "CHRCMD"}, + {&prg_cmd, 1, "PRGCMD"}, + {&mirror, 1, "MIRR"}, + {chr_reg, 6, "CREGS"}, + {prg_reg, 4, "PREGS"}, + {0} +}; + +static void Sync(void) +{ + setprg8(0x8000, prg_reg[0]); + setprg8(0xA000, prg_reg[1]); + setprg8(0xC000, prg_reg[2]); + setprg8(0xE000, prg_reg[3]); + + setchr2(0x0000, chr_reg[0]); + setchr2(0x0800, chr_reg[1]); + setchr1(0x1000, chr_reg[2]); + setchr1(0x1400, chr_reg[3]); + setchr1(0x1800, chr_reg[4]); + setchr1(0x1c00, chr_reg[5]); + + setmirror(mirror); +} + +static DECLFW(UNLA9746Write) +{ + uint8 bits_rev; +// FCEU_printf("write raw %04x:%02x\n",A,V); + switch (A&0xE003) + { +// case 0xA000: mirror = V; break; + case 0x8000: chr_cmd = V; prg_cmd = 0; break; + case 0x8002: prg_cmd = V; chr_cmd = 0; break; + case 0x8001: bits_rev = ((V&0x20)>>5)|((V&0x10)>>3)|((V&0x08)>>1)|((V&0x04)<<1); +// if(prg_cmd>0x23) +// prg_reg[(0x26-prg_cmd)&3] = bits_rev; + switch(chr_cmd) + { + case 0x08: chr_reg[0] = (V << 3); break; + case 0x09: chr_reg[0] = chr_reg[0]|(V >> 2); break; + case 0x0e: chr_reg[1] = (V << 3); break; + case 0x0d: chr_reg[1] = chr_reg[1]|(V >> 2); break; + case 0x12: chr_reg[2] = (V << 4); break; + case 0x11: chr_reg[2] = chr_reg[2]|(V >> 1); FCEU_printf("Sync CHR 0x1000:%02x\n",chr_reg[2]); break; + case 0x16: chr_reg[3] = (V << 4); break; + case 0x15: chr_reg[3] = chr_reg[3]|(V >> 1); break; + case 0x1a: chr_reg[4] = (V << 4); break; + case 0x19: chr_reg[4] = chr_reg[4]|(V >> 1); break; + case 0x1e: chr_reg[5] = (V << 4); break; + case 0x1d: chr_reg[5] = chr_reg[5]|(V >> 1); break; + } + Sync(); + break; + } +} + +static void UNLA9746Power(void) +{ + prg_reg[2]=~1; + prg_reg[3]=~0; + Sync(); + SetReadHandler(0x8000,0xFFFF,CartBR); + SetWriteHandler(0x8000,0xbfff,UNLA9746Write); +} + +static void StateRestore(int version) +{ + Sync(); +} + +void UNLA9746_Init(CartInfo *info) +{ + info->Power=UNLA9746Power; + AddExState(&StateRegs, ~0, 0, 0); +} +/**/ + +/* 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 + */ + +#include "mapinc.h" +#include "mmc3.h" + +static DECLFW(UNLA9746Write) +{ +// FCEU_printf("write raw %04x:%02x\n",A,V); + switch (A&0xE003) + { + case 0x8000: EXPREGS[1]=V; EXPREGS[0]=0; break; + case 0x8002: EXPREGS[0]=V; EXPREGS[1]=0; break; + case 0x8001: { + uint8 bits_rev = ((V&0x20)>>5)|((V&0x10)>>3)|((V&0x08)>>1)|((V&0x04)<<1); + switch(EXPREGS[0]) + { + case 0x26: setprg8(0x8000, bits_rev); break; + case 0x25: setprg8(0xA000, bits_rev); break; + case 0x24: setprg8(0xC000, bits_rev); break; + case 0x23: setprg8(0xE000, bits_rev); break; + } + switch(EXPREGS[1]) + { + case 0x0a: + case 0x08: EXPREGS[2] = (V << 4); break; + case 0x09: setchr1(0x0000, EXPREGS[2]|(V >> 1)); break; + case 0x0b: setchr1(0x0400, EXPREGS[2]|(V >> 1)|1); break; + case 0x0c: + case 0x0e: EXPREGS[2] = (V << 4); break; + case 0x0d: setchr1(0x0800, EXPREGS[2]|(V >> 1)); break; + case 0x0f: setchr1(0x0c00, EXPREGS[2]|(V >> 1)|1); break; + case 0x10: + case 0x12: EXPREGS[2] = (V << 4); break; + case 0x11: setchr1(0x1000, EXPREGS[2]|(V >> 1)); break; + case 0x14: + case 0x16: EXPREGS[2] = (V << 4); break; + case 0x15: setchr1(0x1400, EXPREGS[2]|(V >> 1)); break; + case 0x18: + case 0x1a: EXPREGS[2] = (V << 4); break; + case 0x19: setchr1(0x1800, EXPREGS[2]|(V >> 1)); break; + case 0x1c: + case 0x1e: EXPREGS[2] = (V << 4); break; + case 0x1d: setchr1(0x1c00, EXPREGS[2]|(V >> 1)); break; + } + } + break; + } +} + +static void UNLA9746Power(void) +{ + GenMMC3Power(); + SetWriteHandler(0x8000,0xbfff,UNLA9746Write); +} + +void UNLA9746_Init(CartInfo *info) +{ + GenMMC3_Init(info, 128, 256, 0, 0); + info->Power=UNLA9746Power; + AddExState(EXPREGS, 6, 0, "EXPR"); +} +/**/