diff --git a/src/main/scala/backBoard/shin/SlaveParser.scala b/src/main/scala/backBoard/shin/SlaveParser.scala
index 4aeeb04..73d0653 100644
--- a/src/main/scala/backBoard/shin/SlaveParser.scala
+++ b/src/main/scala/backBoard/shin/SlaveParser.scala
@@ -100,7 +100,7 @@ abstract class SlaveParserBase extends Module{
   // val isDevOnLeft        = RegInit(0.U(2.W));  io.isDevOnLeft        := isDevOnLeft
   val isDevOnLeftModify  = RegInit(false.B);   io.isDevOnLeftModify  := isDevOnLeftModify
   val indexOfLeftDev     = RegInit(0.U(14.W)); io.indexOfLeftDev     := indexOfLeftDev
-  io.isDevOnRight       := Mux( isLastDevice, "b01".U, "b10".U )
+  io.isDevOnRight       := Mux( isLastDevice, "b00".U, "b01".U )
   val isDevOnRightModify = RegInit(false.B);   io.isDevOnRightModify := isDevOnRightModify
   val indexOfRightDev    = RegInit(0.U(14.W)); io.indexOfRightDev    := indexOfRightDev