merge mappers from FCEU-mm

[fceu.git] / boards / transformer.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2009 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 uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
char *GetKeyboard(void);\r
\r
static char *TransformerKeys, oldkeys[256];\r
static int TransformerCycleCount, TransformerChar = 0;\r
\r
static void FP_FASTAPASS(1) TransformerIRQHook(int a)\r
{\r
 TransformerCycleCount+=a;\r
 if(TransformerCycleCount >= 1000)\r
 {\r
   uint32 i;\r
   TransformerCycleCount -= 1000;\r
   TransformerKeys = GetKeyboard();\r
  \r
   for(i=0; i<256; i++) {\r
     if(oldkeys[i] != TransformerKeys[i]) {\r
       if(oldkeys[i] == 0)\r
         TransformerChar = i;\r
       else\r
         TransformerChar = i | 0x80;\r
       X6502_IRQBegin(FCEU_IQEXT);\r
       memcpy((void *)&oldkeys[0], (void *)TransformerKeys, 256);\r
       break;\r
     }\r
   }\r
 }\r
}\r
\r
static DECLFR(TransformerRead)\r
{\r
  uint8 ret = 0;\r
  switch(A&3) {\r
    case 0: ret = TransformerChar & 15; break;\r
    case 1: ret = (TransformerChar >> 4); break;\r
    case 2: break;\r
    case 4: break;\r
  }\r
  X6502_IRQEnd(FCEU_IQEXT);\r
  return ret;\r
}\r
\r
static void TransformerPower(void)\r
{\r
  setprg8r(0x10,0x6000,0);\r
  setprg16(0x8000,0);\r
  setprg16(0xC000,~0);\r
  setchr8(0);\r
\r
  SetReadHandler(0x5000,0x5004,TransformerRead);\r
  SetReadHandler(0x6000,0x7FFF,CartBR);\r
  SetWriteHandler(0x6000,0x7FFF,CartBW);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
\r
  MapIRQHook=TransformerIRQHook;\r
}\r
\r
static void TransformerClose(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
void Transformer_Init(CartInfo *info)\r
{\r
  info->Power=TransformerPower;\r
  info->Close=TransformerClose;\r
\r
  WRAMSIZE=8192;\r
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
  if(info->battery)\r
  {\r
    info->SaveGame[0]=WRAM;\r
    info->SaveGameLen[0]=WRAMSIZE;\r
  }\r
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
}\r