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diff --git a/boards/subor.c b/boards/subor.c
new file mode 100644
index 0000000..31e5b65
--- /dev/null
+++ b/boards/subor.c
@@ -0,0 +1,79 @@
+#include "mapinc.h"
+
+static uint8 mode;
+static uint8 DRegs[4];
+
+static SFORMAT StateRegs[]=
+{
+ {DRegs, 4, "DREG"},
+ {0}
+};
+
+static void Sync(void)
+{
+ int base, bank;
+ base = ((DRegs[0]^DRegs[1])&0x10)<<1;
+ bank = (DRegs[2]^DRegs[3])&0x1f;
+
+ if(DRegs[1]&0x08)
+ {
+   bank &= 0xfe;
+   if(mode==0)
+   {
+     setprg16(0x8000,base+bank+1);
+     setprg16(0xC000,base+bank+0);
+   }
+   else
+   {
+     setprg16(0x8000,base+bank+0);
+     setprg16(0xC000,base+bank+1);
+   }
+ }
+ else
+ {
+   if(DRegs[1]&0x04)
+   {
+     setprg16(0x8000,0x1f);
+     setprg16(0xC000,base+bank);
+   }
+   else
+   {
+     setprg16(0x8000,base+bank);
+     if(mode==0)
+        setprg16(0xC000,0x20);
+     else
+        setprg16(0xC000,0x07);
+   }
+ }
+}
+
+static DECLFW(Mapper167_write)
+{
+ DRegs[(A>>13)&0x03]=V;
+ Sync();
+}
+
+static void StateRestore(int version)
+{
+ Sync();
+}
+
+void Mapper166_init(void)
+{
+ mode=1;
+ DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0;
+ Sync();
+ SetWriteHandler(0x8000,0xFFFF,Mapper167_write);
+ GameStateRestore=StateRestore;
+ AddExState(&StateRegs, ~0, 0, 0);
+}
+
+void Mapper167_init(void)
+{
+ mode=0;
+ DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0;
+ Sync();
+ SetWriteHandler(0x8000,0xFFFF,Mapper167_write);
+ GameStateRestore=StateRestore;
+ AddExState(&StateRegs, ~0, 0, 0);
+}