boards/famicombox.c

   1 /* FCE Ultra - NES/Famicom Emulator\r
   2  *\r
   3  * Copyright notice for this file:\r
   4  *  Copyright (C) 2009 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 \r
  21 #include "mapinc.h"\r
  22 \r
  23 static uint8 regs[8];\r
  24 static uint8 *WRAM = NULL;\r
  25 static uint32 WRAMSIZE;\r
  26 \r
  27 static SFORMAT StateRegs[]=\r
  28 {\r
  29   {regs, 8, "REGS"},\r
  30   {0}\r
  31 };\r
  32 \r
  33 static void Sync(void)\r
  34 {\r
  35   setprg2r(0x10,0x0800,0);\r
  36   setprg2r(0x10,0x1000,1);\r
  37   setprg2r(0x10,0x1800,2);\r
  38   setprg8r(0x10,0x6000,1);\r
  39   setprg16(0x8000,0);\r
  40   setprg16(0xC000,~0);\r
  41   setchr8(0);\r
  42 }\r
  43 \r
  44 //static DECLFW(SSSNROMWrite)\r
  45 //{\r
  46 //  CartBW(A,V);\r
  47 //}\r
  48 \r
  49 static DECLFW(SSSNROMWrite)\r
  50 {\r
  51   //FCEU_printf("write %04x %02x\n",A,V);\r
  52   //regs[A&7] = V;\r
  53 }\r
  54 \r
  55 static DECLFR(SSSNROMRead)\r
  56 {\r
  57   //FCEU_printf("read %04x\n",A);\r
  58   switch(A&7) {\r
  59   case 0: return regs[0]=0xff;   // clear all exceptions\r
  60   case 2: return 0xc0; // DIP selftest + freeplay\r
  61   case 3: return 0x00; // 0, 1 - attract\r
  62                        // 2\r
  63                        // 4    - menu\r
  64                        // 8    - self check and game casette check\r
  65                        // 10   - lock?\r
  66                        // 20   - game title & count display\r
  67   case 7: return 0x22; // TV type, key not turned, relay B\r
  68   default: return 0;\r
  69   }\r
  70 }\r
  71 \r
  72 static void SSSNROMPower(void)\r
  73 {\r
  74   regs[0]=regs[1]=regs[2]=regs[3]=regs[4]=regs[5]=regs[6]=0;\r
  75   regs[7]=0xff;\r
  76   Sync();\r
  77   memset(WRAM,0x00,WRAMSIZE);\r
  78 //  SetWriteHandler(0x0000,0x1FFF,SSSNROMRamWrite);\r
  79   SetReadHandler(0x0800,0x1FFF,CartBR);\r
  80   SetWriteHandler(0x0800,0x1FFF,CartBW);\r
  81   SetReadHandler(0x5000,0x5FFF,SSSNROMRead);\r
  82   SetWriteHandler(0x5000,0x5FFF,SSSNROMWrite);\r
  83   SetReadHandler(0x6000,0x7FFF,CartBR);\r
  84   SetWriteHandler(0x6000,0x7FFF,CartBW);\r
  85   SetReadHandler(0x8000,0xFFFF,CartBR);\r
  86 }\r
  87 \r
  88 static void SSSNROMReset(void)\r
  89 {\r
  90   regs[1]=regs[2]=regs[3]=regs[4]=regs[5]=regs[6]=0;\r
  91 }\r
  92 \r
  93 static void SSSNROMClose(void)\r
  94 {\r
  95   if(WRAM)\r
  96     FCEU_gfree(WRAM);\r
  97   WRAM=NULL;\r
  98 }\r
  99 \r
 100 static void SSSNROMIRQHook(void)\r
 101 {\r
 102 //  X6502_IRQBegin(FCEU_IQEXT);\r
 103 }\r
 104 \r
 105 static void StateRestore(int version)\r
 106 {\r
 107   Sync();\r
 108 }\r
 109 \r
 110 void SSSNROM_Init(CartInfo *info)\r
 111 {\r
 112   info->Reset=SSSNROMReset;\r
 113   info->Power=SSSNROMPower;\r
 114   info->Close=SSSNROMClose;\r
 115   GameHBIRQHook=SSSNROMIRQHook;\r
 116   GameStateRestore=StateRestore;\r
 117 \r
 118   WRAMSIZE=16384;\r
 119   WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
 120   SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
 121 \r
 122   AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
 123   AddExState(&StateRegs, ~0, 0, 0);\r
 124 }\r