mappers updated to 0.98.16

[fceu.git] / boards / 222.c

diff --git a/boards/222.c b/boards/222.c
new file mode 100644 (file)
index 0000000..fd3cc8a
--- /dev/null
+++ b/boards/222.c
@@ -0,0 +1,99 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2005 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "mapinc.h"
+
+static uint16 IRQCount;
+static uint8 IRQa;
+static uint8 prg_reg[2];
+static uint8 chr_reg[8];
+
+static SFORMAT StateRegs[]=
+{
+  {&IRQCount, 2, "IRQC"},
+  {&IRQa, 2, "IRQA"},
+  {prg_reg, 2, "PRG"},
+  {chr_reg, 8, "CHR"},
+  {0}
+};
+
+static void M222IRQ(void)
+{
+  if(IRQa)
+  {
+    IRQCount++;
+    if(IRQCount>=240)
+    {
+      X6502_IRQBegin(FCEU_IQEXT);
+      IRQa=0;
+    }
+  }
+}
+
+static void Sync(void)
+{
+  setprg8(0x8000,prg_reg[0]);
+  setprg8(0xA000,prg_reg[1]);
+  int i;
+  for(i=0; i<8; i++)
+     setchr1(i<<10,chr_reg[i]);     
+}
+
+static DECLFW(M222Write)
+{
+  switch(A&0xF003)
+  {
+    case 0x8000: prg_reg[0]=V; break;
+    case 0xA000: prg_reg[1]=V; break;
+    case 0xB000: chr_reg[0]=V; break;
+    case 0xB002: chr_reg[1]=V; break;
+    case 0xC000: chr_reg[2]=V; break;
+    case 0xC002: chr_reg[3]=V; break;
+    case 0xD000: chr_reg[4]=V; break;
+    case 0xD002: chr_reg[5]=V; break;
+    case 0xE000: chr_reg[6]=V; break;
+    case 0xE002: chr_reg[7]=V; break;
+    case 0xF000: IRQCount=IRQa=V;
+                 X6502_IRQEnd(FCEU_IQEXT);
+                 break;
+  }
+  Sync();
+}
+
+static void M222Power(void)
+{
+  setprg16(0xC000,~0);
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+  SetWriteHandler(0x8000,0xFFFF,M222Write);
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void Mapper222_Init(CartInfo *info)
+{
+  info->Power=M222Power;
+  GameHBIRQHook=M222IRQ;
+  GameStateRestore=StateRestore;
+  AddExState(&StateRegs, ~0, 0, 0);
+}