boards/super24.c

   1 /* FCE Ultra - NES/Famicom Emulator
   2  *
   3  * Copyright notice for this file:
   4  *  Copyright (C) 2005 CaH4e3
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "mapinc.h"
  22 #include "mmc3.h"
  23
  24 //static uint8 *CHRRAM = NULL;
  25 static int masko8[8]={63,31,15,1,3,0,0,0};
  26
  27 static void Super24PW(uint32 A, uint8 V)
  28 {
  29   uint32 NV=V&masko8[EXPREGS[0]&7];
  30   NV|=(EXPREGS[1]<<1);
  31   setprg8r((NV>>6)&0xF,A,NV);
  32 }
  33
  34 static void Super24CW(uint32 A, uint8 V)
  35 {
  36   if(EXPREGS[0]&0x20)
  37     setchr1r(0x10,A,V);
  38   else
  39   {
  40     uint32 NV=V|(EXPREGS[2]<<3);
  41     setchr1r((NV>>9)&0xF,A,NV);
  42   }
  43 }
  44
  45 static DECLFW(Super24Write)
  46 {
  47   switch(A)
  48   {
  49     case 0x5FF0: EXPREGS[0]=V;
  50                  FixMMC3PRG(MMC3_cmd);
  51                  FixMMC3CHR(MMC3_cmd);
  52                  break;
  53     case 0x5FF1: EXPREGS[1]=V;
  54                  FixMMC3PRG(MMC3_cmd);
  55                  break;
  56     case 0x5FF2: EXPREGS[2]=V;
  57                  FixMMC3CHR(MMC3_cmd);
  58                  break;
  59   }
  60 }
  61
  62 static void Super24Power(void)
  63 {
  64   EXPREGS[0]=0x24;
  65   EXPREGS[1]=159;
  66   EXPREGS[2]=0;
  67   GenMMC3Power();
  68   SetWriteHandler(0x5000,0x7FFF,Super24Write);
  69   SetReadHandler(0x8000,0xFFFF,CartBR);
  70 }
  71
  72 static void Super24Reset(void)
  73 {
  74   EXPREGS[0]=0x24;
  75   EXPREGS[1]=159;
  76   EXPREGS[2]=0;
  77   MMC3RegReset();
  78 }
  79
  80 static void Super24Close(void)
  81 {
  82   if(CHRRAM)
  83     FCEU_gfree(CHRRAM);
  84   CHRRAM = NULL;
  85 }
  86
  87 void Super24_Init(CartInfo *info)
  88 {
  89   GenMMC3_Init(info, 128, 256, 0, 0);
  90   info->Power=Super24Power;
  91   info->Reset=Super24Reset;
  92   info->Close=Super24Close;
  93   cwrap=Super24CW;
  94   pwrap=Super24PW;
  95   CHRRAM=(uint8*)FCEU_gmalloc(8192);
  96   SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);
  97   AddExState(CHRRAM, 8192, 0, "CHRR");
  98   AddExState(EXPREGS, 3, 0, "BIG2");
  99 }