merge mappers from FCEU-mm

[fceu.git] / boards / a9746.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2007 CaH4e3\r
 *\r
 * This program is free software; you can redistribute it and/or modify\r
 * it under the terms of the GNU General Public License as published by\r
 * the Free Software Foundation; either version 2 of the License, or\r
 * (at your option) any later version.\r
 *\r
 * This program is distributed in the hope that it will be useful,\r
 * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
 * GNU General Public License for more details.\r
 *\r
 * You should have received a copy of the GNU General Public License\r
 * along with this program; if not, write to the Free Software\r
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
 */\r
\r
#include "mapinc.h"\r
#include "mmc3.h"\r
\r
static DECLFW(UNLA9746Write)\r
{\r
//   FCEU_printf("write raw %04x:%02x\n",A,V);\r
   switch (A&0xE003)\r
   {\r
     case 0x8000: EXPREGS[1]=V; EXPREGS[0]=0; break;\r
     case 0x8002: EXPREGS[0]=V; EXPREGS[1]=0; break;\r
     case 0x8001: {\r
                    uint8 bits_rev = ((V&0x20)>>5)|((V&0x10)>>3)|((V&0x08)>>1)|((V&0x04)<<1);\r
                    switch(EXPREGS[0])\r
                    {\r
                      case 0x26: setprg8(0x8000, bits_rev); break;\r
                      case 0x25: setprg8(0xA000, bits_rev); break; \r
                      case 0x24: setprg8(0xC000, bits_rev); break; \r
                      case 0x23: setprg8(0xE000, bits_rev); break;\r
                    }\r
                    switch(EXPREGS[1])\r
                    {\r
                      case 0x0a:\r
                      case 0x08: EXPREGS[2] = (V << 4); break;\r
                      case 0x09: setchr1(0x0000, EXPREGS[2]|(V >> 1)); break;\r
                      case 0x0b: setchr1(0x0400, EXPREGS[2]|(V >> 1)|1);  break;\r
                      case 0x0c:\r
                      case 0x0e: EXPREGS[2] = (V << 4);  break;\r
                      case 0x0d: setchr1(0x0800, EXPREGS[2]|(V >> 1));  break;\r
                      case 0x0f: setchr1(0x0c00, EXPREGS[2]|(V >> 1)|1);  break;\r
                      case 0x10:\r
                      case 0x12: EXPREGS[2] = (V << 4);  break;\r
                      case 0x11: setchr1(0x1000, EXPREGS[2]|(V >> 1)); break;\r
                      case 0x14:\r
                      case 0x16: EXPREGS[2] = (V << 4);  break;\r
                      case 0x15: setchr1(0x1400, EXPREGS[2]|(V >> 1));  break;\r
                      case 0x18:\r
                      case 0x1a: EXPREGS[2] = (V << 4);  break;\r
                      case 0x19: setchr1(0x1800, EXPREGS[2]|(V >> 1));  break;\r
                      case 0x1c:\r
                      case 0x1e: EXPREGS[2] = (V << 4);  break;\r
                      case 0x1d: setchr1(0x1c00, EXPREGS[2]|(V >> 1));  break;\r
                    }\r
                  }\r
                  break;\r
   }\r
}\r
\r
static void UNLA9746Power(void)\r
{\r
  GenMMC3Power();\r
  SetWriteHandler(0x8000,0xbfff,UNLA9746Write);\r
}\r
\r
void UNLA9746_Init(CartInfo *info)\r
{\r
  GenMMC3_Init(info, 128, 256, 0, 0);\r
  info->Power=UNLA9746Power;\r
  AddExState(EXPREGS, 6, 0, "EXPR");\r
}\r
\r