boards/176.c

   1 /* FCE Ultra - NES/Famicom Emulator\r
   2  *\r
   3  * Copyright notice for this file:\r
   4  *  Copyright (C) 2007 CaH4e3\r
   5  *  Copyright (C) 2012 FCEUX team\r
   6  *\r
   7  * This program is free software; you can redistribute it and/or modify\r
   8  * it under the terms of the GNU General Public License as published by\r
   9  * the Free Software Foundation; either version 2 of the License, or\r
  10  * (at your option) any later version.\r
  11  *\r
  12  * This program is distributed in the hope that it will be useful,\r
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  15  * GNU General Public License for more details.\r
  16  *\r
  17  * You should have received a copy of the GNU General Public License\r
  18  * along with this program; if not, write to the Free Software\r
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
  20  */\r
  21 \r
  22 #include "mapinc.h"\r
  23 \r
  24 extern uint32 ROM_size;\r
  25 \r
  26 static uint8 prg[4], chr, sbw, we_sram;\r
  27 static uint8 *WRAM=NULL;\r
  28 static uint32 WRAMSIZE;\r
  29 \r
  30 static SFORMAT StateRegs[]=\r
  31 {\r
  32   {prg, 4, "PRG"},\r
  33   {&chr, 1, "CHR"},\r
  34         {&sbw, 1, "SBW"},\r
  35   {0}\r
  36 };\r
  37 \r
  38 static void Sync(void)\r
  39 {\r
  40   setprg8r(0x10,0x6000,0);\r
  41         setprg8(0x8000,prg[0]);\r
  42         setprg8(0xA000,prg[1]);\r
  43         setprg8(0xC000,prg[2]);\r
  44         setprg8(0xE000,prg[3]);\r
  45 \r
  46   setchr8(chr);\r
  47 }\r
  48 \r
  49 static DECLFW(M176Write_5001)\r
  50 { \r
  51         printf("%04X = $%02X\n",A,V);\r
  52         if(sbw)\r
  53         {\r
  54                 prg[0] = V*4;\r
  55                 prg[1] = V*4+1;\r
  56                 prg[2] = V*4+2;\r
  57                 prg[3] = V*4+3;\r
  58         }\r
  59   Sync();\r
  60 }\r
  61 \r
  62 static DECLFW(M176Write_5010)\r
  63 { \r
  64         printf("%04X = $%02X\n",A,V);\r
  65         if(V == 0x24) sbw = 1;\r
  66   Sync();\r
  67 }\r
  68 \r
  69 static DECLFW(M176Write_5011)\r
  70 { \r
  71         printf("%04X = $%02X\n",A,V);\r
  72         V >>= 1;\r
  73         if(sbw)\r
  74         {\r
  75                 prg[0] = V*4;\r
  76                 prg[1] = V*4+1;\r
  77                 prg[2] = V*4+2;\r
  78                 prg[3] = V*4+3;\r
  79         }\r
  80   Sync();\r
  81 }\r
  82 \r
  83 static DECLFW(M176Write_5FF1)\r
  84 { \r
  85         printf("%04X = $%02X\n",A,V);\r
  86   V >>= 1;\r
  87         prg[0] = V*4;\r
  88         prg[1] = V*4+1;\r
  89         prg[2] = V*4+2;\r
  90         prg[3] = V*4+3;\r
  91   Sync();\r
  92 }\r
  93 \r
  94 static DECLFW(M176Write_5FF2)\r
  95 { \r
  96         printf("%04X = $%02X\n",A,V);\r
  97   chr = V;\r
  98   Sync();\r
  99 }\r
 100 \r
 101 static DECLFW(M176Write_A001)\r
 102 {\r
 103         we_sram = V & 0x03;\r
 104 }\r
 105 \r
 106 static DECLFW(M176Write_WriteSRAM)\r
 107 {\r
 108 //      if(we_sram)\r
 109                 CartBW(A,V);\r
 110 }\r
 111 \r
 112 static void M176Power(void)\r
 113 {\r
 114   SetReadHandler(0x6000,0x7fff,CartBR);\r
 115   SetWriteHandler(0x6000,0x7fff,M176Write_WriteSRAM);\r
 116   SetReadHandler(0x8000,0xFFFF,CartBR);\r
 117         SetWriteHandler(0xA001,0xA001,M176Write_A001);\r
 118         SetWriteHandler(0x5001,0x5001,M176Write_5001);\r
 119         SetWriteHandler(0x5010,0x5010,M176Write_5010);\r
 120         SetWriteHandler(0x5011,0x5011,M176Write_5011);\r
 121   SetWriteHandler(0x5ff1,0x5ff1,M176Write_5FF1);\r
 122   SetWriteHandler(0x5ff2,0x5ff2,M176Write_5FF2);\r
 123         \r
 124         we_sram = 0;\r
 125         sbw = 0;\r
 126         prg[0] = 0;\r
 127         prg[1] = 1;\r
 128         prg[2] = (ROM_size-2)&63;\r
 129         prg[3] = (ROM_size-1)&63;\r
 130   Sync();\r
 131 }\r
 132 \r
 133 \r
 134 static void M176Close(void)\r
 135 {\r
 136   if(WRAM)\r
 137     FCEU_gfree(WRAM);\r
 138   WRAM=NULL;\r
 139 }\r
 140 \r
 141 static void StateRestore(int version)\r
 142 {\r
 143   Sync();\r
 144 }\r
 145 \r
 146 void Mapper176_Init(CartInfo *info)\r
 147 {\r
 148   info->Power=M176Power;\r
 149   info->Close=M176Close;\r
 150 \r
 151   GameStateRestore=StateRestore;\r
 152 \r
 153   WRAMSIZE=8192;\r
 154   WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
 155   SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
 156   AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
 157   AddExState(&StateRegs, ~0, 0, 0);\r
 158 }\r