boards/103.c

   1 /* FCE Ultra - NES/Famicom Emulator\r
   2  *\r
   3  * Copyright notice for this file:\r
   4  *  Copyright (C) 2007 CaH4e3\r
   5  *\r
   6  * This program is free software; you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation; either version 2 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * This program is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with this program; if not, write to the Free Software\r
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
  19  *\r
  20  * FDS Conversion\r
  21  *\r
  22  */\r
  23 \r
  24 #include "mapinc.h"\r
  25 \r
  26 static uint8 reg0, reg1, reg2;\r
  27 static uint8 *WRAM=NULL;\r
  28 static uint32 WRAMSIZE;\r
  29 \r
  30 static SFORMAT StateRegs[]=\r
  31 {\r
  32   {&reg0, 1, "REG0"},\r
  33   {&reg1, 1, "REG1"},\r
  34   {&reg2, 1, "REG2"},\r
  35   {0}\r
  36 };\r
  37 \r
  38 static void Sync(void)\r
  39 {\r
  40   setchr8(0);\r
  41   setprg8(0x8000,0xc);\r
  42   setprg8(0xe000,0xf);\r
  43   if(reg2&0x10)\r
  44   {\r
  45     setprg8(0x6000,reg0);\r
  46     setprg8(0xa000,0xd);\r
  47     setprg8(0xc000,0xe);\r
  48   }\r
  49   else\r
  50   {\r
  51     setprg8r(0x10,0x6000,0);\r
  52     setprg4(0xa000,(0xd<<1));\r
  53     setprg2(0xb000,(0xd<<2)+2);\r
  54     setprg2r(0x10,0xb800,4);\r
  55     setprg2r(0x10,0xc000,5);\r
  56     setprg2r(0x10,0xc800,6);\r
  57     setprg2r(0x10,0xd000,7);\r
  58     setprg2(0xd800,(0xe<<2)+3);\r
  59   }\r
  60   setmirror(reg1^1);\r
  61 }\r
  62 \r
  63 static DECLFW(M103RamWrite0)\r
  64 {\r
  65   WRAM[A&0x1FFF]=V;\r
  66 }\r
  67 \r
  68 static DECLFW(M103RamWrite1)\r
  69 {\r
  70   WRAM[0x2000+((A-0xB800)&0x1FFF)]=V;\r
  71 }\r
  72 \r
  73 static DECLFW(M103Write0)\r
  74 {\r
  75   reg0=V&0xf;\r
  76   Sync();\r
  77 }\r
  78 \r
  79 static DECLFW(M103Write1)\r
  80 {\r
  81   reg1=(V>>3)&1;\r
  82   Sync();\r
  83 }\r
  84 \r
  85 static DECLFW(M103Write2)\r
  86 {\r
  87   reg2=V;\r
  88   Sync();\r
  89 }\r
  90 \r
  91 static void M103Power(void)\r
  92 {\r
  93   reg0=reg1=0; reg2=0;\r
  94   Sync();\r
  95   SetReadHandler(0x6000,0x7FFF,CartBR);\r
  96   SetWriteHandler(0x6000,0x7FFF,M103RamWrite0);\r
  97   SetReadHandler(0x8000,0xFFFF,CartBR);\r
  98   SetWriteHandler(0xB800,0xD7FF,M103RamWrite1);\r
  99   SetWriteHandler(0x8000,0x8FFF,M103Write0);\r
 100   SetWriteHandler(0xE000,0xEFFF,M103Write1);\r
 101   SetWriteHandler(0xF000,0xFFFF,M103Write2);\r
 102 }\r
 103 \r
 104 static void M103Close(void)\r
 105 {\r
 106   if(WRAM)\r
 107     FCEU_gfree(WRAM);\r
 108   WRAM=NULL;\r
 109 }\r
 110 \r
 111 static void StateRestore(int version)\r
 112 {\r
 113   Sync();\r
 114 }\r
 115 \r
 116 void Mapper103_Init(CartInfo *info)\r
 117 {\r
 118   info->Power=M103Power;\r
 119   info->Close=M103Close;\r
 120   GameStateRestore=StateRestore;\r
 121 \r
 122   WRAMSIZE=16384;\r
 123   WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
 124   SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
 125   AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
 126 \r
 127   AddExState(&StateRegs, ~0, 0, 0);\r
 128 }\r