mappers updated to 0.98.16

[fceu.git] / boards / bmc70in1.c

diff --git a/boards/bmc70in1.c b/boards/bmc70in1.c
new file mode 100644 (file)
index 0000000..9d4eb28
--- /dev/null
+++ b/boards/bmc70in1.c
@@ -0,0 +1,116 @@
+/* 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 uint8 is_large_banks;
+static uint8 large_bank;
+static uint8 prg_bank;
+static uint8 chr_bank;
+static uint8 bank_mode;
+static uint8 mirroring;
+static SFORMAT StateRegs[]=
+{
+  {&large_bank, 1, "LB"},
+  {&prg_bank, 1, "PRG"},
+  {&chr_bank, 1, "CHR"},
+  {&bank_mode, 1, "BM"},
+  {&mirroring, 1, "MIRR"},
+  {0}
+};
+
+static void Sync(void)
+{
+  switch (bank_mode)
+  {
+    case 0x00:
+    case 0x10: setprg16(0x8000,large_bank|prg_bank);
+               setprg16(0xC000,large_bank|7);
+               break;
+    case 0x20: setprg32(0x8000,(large_bank|prg_bank)>>1);
+               break;
+    case 0x30: setprg16(0x8000,large_bank|prg_bank);
+               setprg16(0xC000,large_bank|prg_bank);
+               break;
+  }
+  setmirror(mirroring);
+  if(!is_large_banks)
+    setchr8(chr_bank);
+}
+
+static DECLFR(BMC70in1Read)
+{
+  if(bank_mode==0x10)
+    if(is_large_banks)
+      return CartBR((A&0xFFF0)|0x06);
+    else
+      return CartBR((A&0xFFF0)|0x0d);
+  else
+    return CartBR(A);
+}
+
+static DECLFW(BMC70in1Write)
+{
+  if(A&0x4000)
+  {
+    bank_mode=A&0x30;
+    prg_bank=A&7;
+  }
+  else
+  {
+    mirroring=((A&0x20)>>5)^1;
+    if(is_large_banks)
+      large_bank=(A&3)<<3;
+    else
+      chr_bank=A&7;
+  }
+  Sync();
+}
+
+static void BMC70in1Power(void)
+{
+  setchr8(0);
+  bank_mode=0;
+  large_bank=0;
+  Sync();
+  SetReadHandler(0x8000,0xFFFF,BMC70in1Read);
+  SetWriteHandler(0x8000,0xffff,BMC70in1Write);
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+void BMC70in1_Init(CartInfo *info)
+{
+  is_large_banks=0;
+  info->Power=BMC70in1Power;
+  GameStateRestore=StateRestore;
+  AddExState(&StateRegs, ~0, 0, 0);
+}
+
+void BMC70in1B_Init(CartInfo *info)
+{
+  is_large_banks=1;
+  info->Power=BMC70in1Power;
+  GameStateRestore=StateRestore;
+  AddExState(&StateRegs, ~0, 0, 0);
+}