X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=boards%2F68.c;fp=boards%2F68.c;h=6a9420c6a51c7ca2582bb8d88b51453250a861d4;hp=0000000000000000000000000000000000000000;hb=386f5371eb984fb9c2860c83e740890a75cd45c1;hpb=eec2623f6183dd0f9494b99065a16bf90f2a1ccf

diff --git a/boards/68.c b/boards/68.c
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+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2006 CaH4e3
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "mapinc.h"
+
+static uint8 chr_reg[4];
+static uint8 kogame, prg_reg, nt1, nt2, mirr;
+
+static uint8 *WRAM=NULL;
+static uint32 WRAMSIZE, count;
+
+static SFORMAT StateRegs[]=
+{
+  {&nt1, 1, "NT1"},
+  {&nt2, 1, "NT2"},
+  {&mirr, 1, "MIRR"},
+  {&prg_reg, 1, "PRG"},
+  {&kogame, 1, "KOGAME"},
+  {&count, 4, "COUNT"},
+  {chr_reg, 4, "CHR"},
+  {0}
+};
+
+static void M68NTfix(void)
+{
+  if((!UNIFchrrama)&&(mirr&0x10))
+  {
+    PPUNTARAM = 0;
+    switch(mirr&3)
+    {
+     case 0: vnapage[0]=vnapage[2]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);
+             vnapage[1]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);
+             break;
+     case 1: vnapage[0]=vnapage[1]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);
+             vnapage[2]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);
+             break;
+     case 2: vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);
+             break;
+     case 3: vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);
+             break;
+    }
+  }
+  else
+    switch(mirr&3)
+    {
+      case 0: setmirror(MI_V); break;
+      case 1: setmirror(MI_H); break;
+      case 2: setmirror(MI_0); break;
+      case 3: setmirror(MI_1); break;
+    }
+}
+
+static void Sync(void)
+{
+  setchr2(0x0000,chr_reg[0]);
+  setchr2(0x0800,chr_reg[1]);
+  setchr2(0x1000,chr_reg[2]);
+  setchr2(0x1800,chr_reg[3]);
+  setprg8r(0x10,0x6000,0);
+  setprg16r((PRGptr[1])?kogame:0,0x8000,prg_reg);
+  setprg16(0xC000,~0);
+}
+
+static DECLFR(M68Read)
+{
+  if(!(kogame&8))
+  {
+    count++;
+    if(count==1784)
+      setprg16r(0,0x8000,prg_reg);
+  }
+  return CartBR(A);
+}
+
+static DECLFW(M68WriteLo)
+{
+  if(!V)
+  { 
+    count = 0;
+    setprg16r((PRGptr[1])?kogame:0,0x8000,prg_reg);
+  }
+}
+
+static DECLFW(M68WriteCHR)
+{
+  chr_reg[(A>>12)&3]=V;
+  Sync();
+}
+
+static DECLFW(M68WriteNT1)
+{
+  nt1 = V;            
+  M68NTfix();
+}
+
+static DECLFW(M68WriteNT2)
+{
+  nt2 = V;            
+  M68NTfix();
+}
+
+static DECLFW(M68WriteMIR)
+{
+  mirr = V;
+  M68NTfix();
+}
+
+static DECLFW(M68WriteROM)
+{
+  prg_reg = V&7;
+  kogame = ((V>>3)&1)^1;
+  Sync();
+}
+
+static void M68Power(void)
+{
+  prg_reg = 0;
+  kogame = 0;
+  Sync();
+  M68NTfix();
+  SetReadHandler(0x6000,0x7FFF,CartBR);
+  SetReadHandler(0x8000,0xBFFF,M68Read);
+  SetReadHandler(0xC000,0xFFFF,CartBR);
+  SetWriteHandler(0x8000,0xBFFF,M68WriteCHR);
+  SetWriteHandler(0xC000,0xCFFF,M68WriteNT1);
+  SetWriteHandler(0xD000,0xDFFF,M68WriteNT2);
+  SetWriteHandler(0xE000,0xEFFF,M68WriteMIR);
+  SetWriteHandler(0xF000,0xFFFF,M68WriteROM);
+  SetWriteHandler(0x6000,0x6000,M68WriteLo);
+  SetWriteHandler(0x6001,0x7FFF,CartBW);
+}
+
+static void M68Close(void)
+{
+  if(WRAM)
+    FCEU_gfree(WRAM);
+  WRAM=NULL;
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+  M68NTfix();
+}
+
+void Mapper68_Init(CartInfo *info)
+{
+  info->Power=M68Power;
+  info->Close=M68Close;
+  GameStateRestore=StateRestore;
+  WRAMSIZE=8192;
+  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
+  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
+  if(info->battery)
+  {
+    info->SaveGame[0]=WRAM;
+    info->SaveGameLen[0]=WRAMSIZE;
+  }
+  AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+  AddExState(&StateRegs, ~0, 0, 0);
+}