merge mappers from FCEU-mm

[fceu.git] / boards / t-262.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2006 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
\r
static uint16 addrreg;\r
static uint8 datareg;\r
static uint8 busy;\r
static SFORMAT StateRegs[]=\r
{\r
  {&addrreg, 2, "AREG"},\r
  {&datareg, 1, "DREG"},\r
  {&busy, 1, "BUSY"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  uint16 base=((addrreg&0x60)>>2)|((addrreg&0x100)>>3);  \r
  setprg16(0x8000,(datareg&7)|base);\r
  setprg16(0xC000,7|base);\r
  setmirror(((addrreg&2)>>1)^1);\r
}\r
\r
static DECLFW(BMCT262Write)\r
{\r
  if(busy||(A==0x8000))\r
    datareg=V;\r
  else\r
  {\r
    addrreg=A;\r
    busy=1;\r
  }\r
  Sync();\r
}\r
\r
static void BMCT262Power(void)\r
{\r
  setchr8(0);\r
  SetWriteHandler(0x8000,0xFFFF,BMCT262Write);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  busy=0;\r
  addrreg=0;\r
  datareg=0xff;\r
  Sync();\r
}\r
\r
static void BMCT262Reset(void)\r
{\r
  busy=0;\r
  addrreg=0;\r
  datareg=0;\r
  Sync();\r
}\r
\r
static void BMCT262Restore(int version)\r
{\r
  Sync();\r
}\r
\r
void BMCT262_Init(CartInfo *info)\r
{\r
  info->Power=BMCT262Power;\r
  info->Reset=BMCT262Reset;\r
  GameStateRestore=BMCT262Restore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r