mappers updated to 0.98.16

[fceu.git] / boards / 95.c

diff --git a/boards/95.c b/boards/95.c
new file mode 100644 (file)
index 0000000..7b69435
--- /dev/null
+++ b/boards/95.c
@@ -0,0 +1,124 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2002 Xodnizel
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "mapinc.h"
+
+static uint8 lastA;
+static uint8 DRegs[8];
+static uint8 cmd;
+static uint8 MirCache[8];
+
+static SFORMAT DB_StateRegs[]={
+  {DRegs, 8, "DREG"},
+  {&cmd, 1, "CMD"},
+  {&lastA, 1, "LAST"},
+  {0}
+};
+
+static void toot(void)
+{
+  int x;
+
+  MirCache[0]=MirCache[1]=(DRegs[0]>>4)&1;
+  MirCache[2]=MirCache[3]=(DRegs[1]>>4)&1;
+
+  for(x=0;x<4;x++)
+     MirCache[4+x]=(DRegs[2+x]>>5)&1;
+  onemir(MirCache[lastA]);
+}
+
+static void Sync()
+{
+  setchr2(0x0000,DRegs[0]&0x1F);
+  setchr2(0x0800,DRegs[1]&0x1F);
+  setchr1(0x1000,DRegs[2]&0x1F);
+  setchr1(0x1400,DRegs[3]&0x1F);
+  setchr1(0x1800,DRegs[4]&0x1F);
+  setchr1(0x1C00,DRegs[5]&0x1F);
+  setprg8(0x8000,DRegs[6]&0x1F);
+  setprg8(0xa000,DRegs[7]&0x1F);
+  toot();
+}
+
+static DECLFW(Mapper95_write)
+{
+  switch(A&0xF001)
+  {
+    case 0x8000: cmd = V; break;
+    case 0x8001:
+     switch(cmd&0x07)
+     {
+       case 0: DRegs[0]=(V&0x3F)>>1; break;
+       case 1: DRegs[1]=(V&0x3F)>>1; break;
+       case 2: DRegs[2]=V&0x3F; break;
+       case 3: DRegs[3]=V&0x3F; break;
+       case 4: DRegs[4]=V&0x3F; break;
+       case 5: DRegs[5]=V&0x3F; break;
+       case 6: DRegs[6]=V&0x3F; break;
+       case 7: DRegs[7]=V&0x3F; break;
+     }
+     Sync();
+  }
+}
+
+static void FP_FASTAPASS(1) dragonbust_ppu(uint32 A)
+{
+  static int last=-1;
+  static uint8 z;
+
+  if(A>=0x2000) return;
+
+  A>>=10;
+  lastA=A;
+  z=MirCache[A];
+  if(z!=last)
+  {
+    onemir(z);
+    last=z;
+  }
+}
+
+static void DBPower(void)
+{
+  memset(DRegs,0x3F,8);
+  DRegs[0]=DRegs[1]=0x1F;
+
+  Sync();
+
+  setprg8(0xc000,0x3E);
+  setprg8(0xe000,0x3F);
+
+  SetReadHandler(0x8000,0xffff,CartBR);
+  SetWriteHandler(0x8000,0xffff,Mapper95_write);
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void Mapper95_Init(CartInfo *info)
+{
+  info->Power=DBPower;
+  AddExState(DB_StateRegs, ~0, 0, 0);
+  PPU_hook=dragonbust_ppu;
+  GameStateRestore=StateRestore;
+}
+