boards/112.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  * NTDEC, ASDER games
  21  *
  22  */
  23
  24 #include "mapinc.h"
  25
  26 static uint8 reg[8];
  27 static uint8 mirror, cmd, bank;
  28 static uint8 *WRAM=NULL;
  29
  30 static SFORMAT StateRegs[]=
  31 {
  32   {&cmd, 1, "CMD"},
  33   {&mirror, 1, "MIRR"},
  34   {&bank, 1, "BANK"},
  35   {reg, 8, "REGS"},
  36   {0}
  37 };
  38
  39 static void Sync(void)
  40 {
  41   setmirror(mirror^1);
  42   setprg8(0x8000,reg[0]);
  43   setprg8(0xA000,reg[1]);
  44   setchr2(0x0000,(reg[2]>>1));
  45   setchr2(0x0800,(reg[3]>>1));
  46   setchr1(0x1000,((bank&0x10)<<4)|reg[4]);
  47   setchr1(0x1400,((bank&0x20)<<3)|reg[5]);
  48   setchr1(0x1800,((bank&0x40)<<2)|reg[6]);
  49   setchr1(0x1C00,((bank&0x80)<<1)|reg[7]);
  50 }
  51
  52 static DECLFW(M112Write)
  53 {
  54   switch(A)
  55   {
  56     case 0xe000: mirror=V&1; Sync(); ;break;
  57     case 0x8000: cmd=V&7; break;
  58     case 0xa000: reg[cmd]=V; Sync(); break;
  59     case 0xc000: bank=V; Sync(); break;
  60   }
  61 }
  62
  63 static void M112Close(void)
  64 {
  65   if(WRAM)
  66     FCEU_gfree(WRAM);
  67   WRAM = NULL;
  68 }
  69
  70 static void M112Power(void)
  71 {
  72   bank=0;
  73   setprg16(0xC000,~0);
  74   setprg8r(0x10,0x6000,0);
  75   SetReadHandler(0x8000,0xFFFF,CartBR);
  76   SetWriteHandler(0x8000,0xFFFF,M112Write);
  77   SetWriteHandler(0x4020,0x5FFF,M112Write);
  78   SetReadHandler(0x6000,0x7FFF,CartBR);
  79   SetWriteHandler(0x6000,0x7FFF,CartBW);
  80 }
  81
  82 static void StateRestore(int version)
  83 {
  84   Sync();
  85 }
  86
  87 void Mapper112_Init(CartInfo *info)
  88 {
  89   info->Power=M112Power;
  90   info->Close=M112Close;
  91   GameStateRestore=StateRestore;
  92   WRAM=(uint8*)FCEU_gmalloc(8192);
  93   SetupCartPRGMapping(0x10,WRAM,8192,1);
  94   AddExState(WRAM, 8192, 0, "WRAM");
  95   AddExState(&StateRegs, ~0, 0, 0);
  96 }