merge mapper code from FCEUX

[fceu.git] / boards / 176.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2007 CaH4e3\r
 *  Copyright (C) 2012 FCEUX team\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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
 */\r
\r
#include "mapinc.h"\r
\r
extern uint32 ROM_size;\r
\r
static uint8 prg[4], chr, sbw, we_sram;\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {prg, 4, "PRG"},\r
  {&chr, 1, "CHR"},\r
	{&sbw, 1, "SBW"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setprg8r(0x10,0x6000,0);\r
	setprg8(0x8000,prg[0]);\r
	setprg8(0xA000,prg[1]);\r
	setprg8(0xC000,prg[2]);\r
	setprg8(0xE000,prg[3]);\r
\r
  setchr8(chr);\r
}\r
\r
static DECLFW(M176Write_5001)\r
{ \r
	printf("%04X = $%02X\n",A,V);\r
	if(sbw)\r
	{\r
		prg[0] = V*4;\r
		prg[1] = V*4+1;\r
		prg[2] = V*4+2;\r
		prg[3] = V*4+3;\r
	}\r
  Sync();\r
}\r
\r
static DECLFW(M176Write_5010)\r
{ \r
	printf("%04X = $%02X\n",A,V);\r
	if(V == 0x24) sbw = 1;\r
  Sync();\r
}\r
\r
static DECLFW(M176Write_5011)\r
{ \r
	printf("%04X = $%02X\n",A,V);\r
	V >>= 1;\r
	if(sbw)\r
	{\r
		prg[0] = V*4;\r
		prg[1] = V*4+1;\r
		prg[2] = V*4+2;\r
		prg[3] = V*4+3;\r
	}\r
  Sync();\r
}\r
\r
static DECLFW(M176Write_5FF1)\r
{ \r
	printf("%04X = $%02X\n",A,V);\r
  V >>= 1;\r
	prg[0] = V*4;\r
	prg[1] = V*4+1;\r
	prg[2] = V*4+2;\r
	prg[3] = V*4+3;\r
  Sync();\r
}\r
\r
static DECLFW(M176Write_5FF2)\r
{ \r
	printf("%04X = $%02X\n",A,V);\r
  chr = V;\r
  Sync();\r
}\r
\r
static DECLFW(M176Write_A001)\r
{\r
	we_sram = V & 0x03;\r
}\r
\r
static DECLFW(M176Write_WriteSRAM)\r
{\r
//	if(we_sram)\r
		CartBW(A,V);\r
}\r
\r
static void M176Power(void)\r
{\r
  SetReadHandler(0x6000,0x7fff,CartBR);\r
  SetWriteHandler(0x6000,0x7fff,M176Write_WriteSRAM);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
	SetWriteHandler(0xA001,0xA001,M176Write_A001);\r
	SetWriteHandler(0x5001,0x5001,M176Write_5001);\r
	SetWriteHandler(0x5010,0x5010,M176Write_5010);\r
	SetWriteHandler(0x5011,0x5011,M176Write_5011);\r
  SetWriteHandler(0x5ff1,0x5ff1,M176Write_5FF1);\r
  SetWriteHandler(0x5ff2,0x5ff2,M176Write_5FF2);\r
	\r
	we_sram = 0;\r
	sbw = 0;\r
	prg[0] = 0;\r
	prg[1] = 1;\r
	prg[2] = (ROM_size-2)&63;\r
	prg[3] = (ROM_size-1)&63;\r
  Sync();\r
}\r
\r
\r
static void M176Close(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 Mapper176_Init(CartInfo *info)\r
{\r
  info->Power=M176Power;\r
  info->Close=M176Close;\r
\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
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r