merge x6502 code FCEUX

[fceu.git] / boards / dance2000.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
 * Dance 2000 12-in-1\r
 *\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 prg, mirr, prgmode;\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&prg, 1, "REGS"},\r
  {&mirr, 1, "MIRR"},\r
  {&prgmode, 1, "MIRR"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setmirror(mirr);\r
  setprg8r(0x10,0x6000,0);\r
  setchr8(0);\r
  if(prgmode)\r
    setprg32(0x8000,prg&7);\r
  else {\r
    setprg16(0x8000,prg&0x0f);\r
    setprg16(0xC000,0);\r
  }\r
}\r
\r
static DECLFW(UNLD2000Write)\r
{\r
//  FCEU_printf("write %04x:%04x\n",A,V);\r
  switch(A) {\r
    case 0x5000: prg = V; Sync(); break;\r
    case 0x5200: mirr = (V & 1)^1; prgmode = V & 4; Sync(); break;\r
//    default: FCEU_printf("write %04x:%04x\n",A,V);\r
  }\r
}\r
\r
static DECLFR(UNLD2000Read)\r
{\r
  if(prg & 0x40)\r
    return X.DB;\r
  else\r
    return CartBR(A);\r
}\r
\r
static void UNLD2000Power(void)\r
{\r
  prg = prgmode = 0;\r
  Sync();\r
  SetReadHandler(0x6000,0x7FFF,CartBR);\r
  SetWriteHandler(0x6000,0x7FFF,CartBW);\r
  SetReadHandler(0x8000,0xFFFF,UNLD2000Read);\r
  SetWriteHandler(0x4020,0x5FFF,UNLD2000Write);\r
}\r
\r
static void UNLAX5705IRQ(void)\r
{\r
  if(scanline > 174) setchr4(0x0000,1);\r
  else setchr4(0x0000,0);\r
}\r
\r
static void UNLD2000Close(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void UNLD2000_Init(CartInfo *info)\r
{\r
  info->Power=UNLD2000Power;\r
  info->Close=UNLD2000Close;\r
  GameHBIRQHook=UNLAX5705IRQ;\r
  GameStateRestore=StateRestore;\r
\r
  WRAMSIZE=8192;\r
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r