merge mappers from FCEU-mm

[fceu.git] / boards / lh53.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
 * FDS Conversion\r
 *\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 reg, IRQa;\r
static int32 IRQCount;\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&reg, 1, "REG"},\r
  {&IRQa, 1, "IRQA"},\r
  {&IRQCount, 4, "IRQC"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setchr8(0);\r
  setprg8(0x6000,reg);\r
  setprg8(0x8000,0xc);\r
  setprg4(0xa000,(0xd<<1));\r
  setprg2(0xb000,(0xd<<2)+2);\r
  setprg2r(0x10,0xb800,4);\r
  setprg2r(0x10,0xc000,5);\r
  setprg2r(0x10,0xc800,6);\r
  setprg2r(0x10,0xd000,7);\r
  setprg2(0xd800,(0xe<<2)+3);\r
  setprg8(0xe000,0xf);\r
}\r
\r
static DECLFW(LH53RamWrite)\r
{\r
  WRAM[(A-0xB800)&0x1FFF]=V;\r
}\r
\r
static DECLFW(LH53Write)\r
{\r
  reg=V;\r
  Sync();\r
}\r
\r
static DECLFW(LH53IRQaWrite)\r
{\r
  IRQa = V&2;\r
  IRQCount = 0;\r
  if(!IRQa)\r
    X6502_IRQEnd(FCEU_IQEXT);\r
}\r
\r
static void FP_FASTAPASS(1) LH53IRQ(int a)\r
{\r
  if(IRQa)\r
  {\r
    IRQCount+=a;\r
    if(IRQCount>7560)\r
      X6502_IRQBegin(FCEU_IQEXT);\r
  }\r
}\r
\r
static void LH53Power(void)\r
{\r
  Sync();\r
  SetReadHandler(0x6000,0xFFFF,CartBR);\r
  SetWriteHandler(0xB800,0xD7FF,LH53RamWrite);\r
  SetWriteHandler(0xE000,0xEFFF,LH53IRQaWrite);\r
  SetWriteHandler(0xF000,0xFFFF,LH53Write);\r
}\r
\r
static void LH53Close(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void LH53_Init(CartInfo *info)\r
{\r
  info->Power=LH53Power;\r
  info->Close=LH53Close;\r
  MapIRQHook=LH53IRQ;\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