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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  * NTDEC, ASDER games
  20  */
  21
  22 #include "mapinc.h"
  23
  24 static uint8 reg[8];
  25 static uint8 mirror, cmd, bank;
  26 static uint8 *WRAM=NULL;
  27
  28 static SFORMAT StateRegs[]=
  29 {
  30   {&cmd, 1, "CMD"},
  31   {&mirror, 1, "MIRR"},
  32   {&bank, 1, "BANK"},
  33   {reg, 8, "REGS"},
  34   {0}
  35 };
  36
  37 static void Sync(void)
  38 {
  39   setmirror(mirror^1);
  40   setprg8(0x8000,reg[0]);
  41   setprg8(0xA000,reg[1]);
  42   setchr2(0x0000,(reg[2]>>1));
  43   setchr2(0x0800,(reg[3]>>1));
  44   setchr1(0x1000,((bank&0x10)<<4)|reg[4]);
  45   setchr1(0x1400,((bank&0x20)<<3)|reg[5]);
  46   setchr1(0x1800,((bank&0x40)<<2)|reg[6]);
  47   setchr1(0x1C00,((bank&0x80)<<1)|reg[7]);
  48 }
  49
  50 static DECLFW(M112Write)
  51 {
  52   switch(A)
  53   {
  54     case 0xe000: mirror=V&1; Sync(); ;break;
  55     case 0x8000: cmd=V&7; break;
  56     case 0xa000: reg[cmd]=V; Sync(); break;
  57     case 0xc000: bank=V; Sync(); break;
  58   }
  59 }
  60
  61 static void M112Close(void)
  62 {
  63   if(WRAM)
  64     FCEU_gfree(WRAM);
  65   WRAM = NULL;
  66 }
  67
  68 static void M112Power(void)
  69 {
  70   bank=0;
  71   setprg16(0xC000,~0);
  72   setprg8r(0x10,0x6000,0);
  73   SetReadHandler(0x8000,0xFFFF,CartBR);
  74   SetWriteHandler(0x8000,0xFFFF,M112Write);
  75   SetWriteHandler(0x4020,0x5FFF,M112Write);
  76   SetReadHandler(0x6000,0x7FFF,CartBR);
  77   SetWriteHandler(0x6000,0x7FFF,CartBW);
  78 }
  79
  80 static void StateRestore(int version)
  81 {
  82   Sync();
  83 }
  84
  85 void Mapper112_Init(CartInfo *info)
  86 {
  87   info->Power=M112Power;
  88   info->Close=M112Close;
  89   GameStateRestore=StateRestore;
  90   WRAM=(uint8*)FCEU_gmalloc(8192);
  91   SetupCartPRGMapping(0x10,WRAM,8192,1);
  92   AddExState(WRAM, 8192, 0, "WRAM");
  93   AddExState(&StateRegs, ~0, 0, 0);
  94 }