diff --git a/npc/core/src/main/scala/Main.scala b/npc/core/src/main/scala/Main.scala
index 2ac6b7e..a78581f 100644
--- a/npc/core/src/main/scala/Main.scala
+++ b/npc/core/src/main/scala/Main.scala
@@ -40,6 +40,11 @@ class Control(width: Int) extends Module {
   type T =
     Bool :: reg.WriteSelect.Type :: pc.SrcSelect.Type :: alu.OpSelect.Type :: alu.SrcSelect.Type :: HNil
   val dst: T = reg.ctrlBindPorts ++ pc.ctrlBindPorts ++ alu.ctrlBindPorts
+
+  val dstList = dst.toList
+  val reversePrefixSum = dstList.scanLeft(0)(_ + _.getWidth).reverse
+  val slices = reversePrefixSum.zip(reversePrefixSum.tail)
+
   import reg.WriteSelect._
   import pc.SrcSelect._
   import alu.OpSelect._
@@ -50,26 +55,15 @@ class Control(width: Int) extends Module {
     //     writeEnable :: writeSelect :: srcSelect  ::
     (addi, true.B      :: rAluOut     :: pStaticNpc :: aOpAdd :: aSrcImm :: HNil),
   )
+  val default = BitPat.dontCare(dstList.map(_.getWidth).reduce(_ + _))
+
   def toBits(t: T): BitPat = {
     val list: List[Data] = t.toList
     list.map(x => BitPat(x.litValue.toInt.U(x.getWidth.W))).reduceLeft(_ ## _)
   }
-
-  val default = BitPat("b????????")
-
-  reg.writeEnable := false.B
-  reg.writeSelect := reg.WriteSelect(0.U)
-  alu.op := alu.OpSelect(0.U)
-  pc.srcSelect := pc.SrcSelect(0.U)
-
   val out = decoder(
     inst,
     TruthTable(ControlMapping.map(it => (it._1 -> toBits(it._2))), default))
-  println(out)
-
-  val dstList = dst.toList
-  val reversePrefixSum = dstList.scanLeft(0)(_ + _.getWidth).reverse
-  val slices = reversePrefixSum.zip(reversePrefixSum.tail)
   val srcList = slices.map(s => out(s._1 - 1, s._2))
 
   srcList
diff --git a/npc/resource/addi.txt b/npc/resource/addi.txt
index 55960bf..8eb11e4 100644
--- a/npc/resource/addi.txt
+++ b/npc/resource/addi.txt
@@ -1,10 +1,10 @@
-00084113
-00084113
-00084113
-00084113
-00084113
-00084113
-00084113
-00084113
-00084113
-00084113
+00114113
+00114113
+00114113
+00114113
+00114113
+00114113
+00114113
+00114113
+00114113
+00114113
diff --git a/npc/waveform.vcd b/npc/waveform.vcd
index a3bc5ab..7f9ab17 100644
--- a/npc/waveform.vcd
+++ b/npc/waveform.vcd
@@ -136,11 +136,14 @@ b0000 P
 0R
 b10000001 S
 #1
+b00000000000000000000000000000001 $
+b00000000000000000000000000000001 &
 b10000000000000000000000000000100 '
 b10000000000000000000000000000000 (
-b00000000000010000100000100010011 *
+b00000000000100010100000100010011 *
 b00010 +
-b10000 ,
+b00010 ,
+b00001 -
 0N
 #2
 1N
@@ -162,9 +165,11 @@ b10000 ,
 1N
 0O
 #11
+b00000000000000000000000000000001 #
 b10000000000000000000000000001000 '
 b10000000000000000000000000000100 (
 b0000000100 )
+b00000000000000000000000000000001 0
 0N
 #12
 1N
@@ -183,12 +188,16 @@ b0000001100 )
 #16
 1N
 #17
+b00000000000000000000000000000000 #
+b00000000000000000000000000000000 $
+b00000000000000000000000000000000 &
 b10000000000000000000000000010100 '
 b10000000000000000000000000010000 (
 b0000010000 )
 b00000000000000000000000000000000 *
 b00000 +
 b00000 ,
+b00000 -
 0N
 #18
 1N