diff --git a/src/main/scala/def/def.scala b/src/main/scala/def/def.scala
new file mode 100644
index 0000000..e69de29
diff --git a/src/main/scala/gcd/DecoupledGCD.scala b/src/main/scala/gcd/DecoupledGCD.scala
deleted file mode 100644
index 1cd2993..0000000
--- a/src/main/scala/gcd/DecoupledGCD.scala
+++ /dev/null
@@ -1,73 +0,0 @@
-// See README.md for license details.
-
-package gcd
-
-import chisel3._
-import chisel3.util.Decoupled
-
-class GcdInputBundle(val w: Int) extends Bundle {
-  val value1 = UInt(w.W)
-  val value2 = UInt(w.W)
-}
-
-class GcdOutputBundle(val w: Int) extends Bundle {
-  val value1 = UInt(w.W)
-  val value2 = UInt(w.W)
-  val gcd    = UInt(w.W)
-}
-
-/**
-  * Compute Gcd using subtraction method.
-  * Subtracts the smaller from the larger until register y is zero.
-  * value input register x is then the Gcd.
-  * Unless first input is zero then the Gcd is y.
-  * Can handle stalls on the producer or consumer side
-  */
-class DecoupledGcd(width: Int) extends Module {
-  val input = IO(Flipped(Decoupled(new GcdInputBundle(width))))
-  val output = IO(Decoupled(new GcdOutputBundle(width)))
-
-  val xInitial    = Reg(UInt())
-  val yInitial    = Reg(UInt())
-  val x           = Reg(UInt())
-  val y           = Reg(UInt())
-  val busy        = RegInit(false.B)
-  val resultValid = RegInit(false.B)
-
-  input.ready := ! busy
-  output.valid := resultValid
-  output.bits := DontCare
-
-  when(busy)  {
-    when(x > y) {
-      x := x - y
-    }.otherwise {
-      y := y - x
-    }
-    when(x === 0.U || y === 0.U) {
-      when(x === 0.U) {
-        output.bits.gcd := y
-      }.otherwise {
-        output.bits.gcd := x
-      }
-
-      output.bits.value1 := xInitial
-      output.bits.value2 := yInitial
-      resultValid := true.B
-
-      when(output.ready && resultValid) {
-        busy := false.B
-        resultValid := false.B
-      }
-    }
-  }.otherwise {
-    when(input.valid) {
-      val bundle = input.deq()
-      x := bundle.value1
-      y := bundle.value2
-      xInitial := bundle.value1
-      yInitial := bundle.value2
-      busy := true.B
-    }
-  }
-}
diff --git a/src/main/scala/gcd/GCD.scala b/src/main/scala/gcd/GCD.scala
deleted file mode 100644
index 07e434c..0000000
--- a/src/main/scala/gcd/GCD.scala
+++ /dev/null
@@ -1,34 +0,0 @@
-// See README.md for license details.
-
-package gcd
-
-import chisel3._
-
-/**
-  * Compute GCD using subtraction method.
-  * Subtracts the smaller from the larger until register y is zero.
-  * value in register x is then the GCD
-  */
-class GCD extends Module {
-  val io = IO(new Bundle {
-    val value1        = Input(UInt(16.W))
-    val value2        = Input(UInt(16.W))
-    val loadingValues = Input(Bool())
-    val outputGCD     = Output(UInt(16.W))
-    val outputValid   = Output(Bool())
-  })
-
-  val x  = Reg(UInt())
-  val y  = Reg(UInt())
-
-  when(x > y) { x := x - y }
-    .otherwise { y := y - x }
-
-  when(io.loadingValues) {
-    x := io.value1
-    y := io.value2
-  }
-
-  io.outputGCD := x
-  io.outputValid := y === 0.U
-}
diff --git a/src/main/scala/mac/MAC.scala b/src/main/scala/mac/MAC.scala
new file mode 100644
index 0000000..dbd6621
--- /dev/null
+++ b/src/main/scala/mac/MAC.scala
@@ -0,0 +1,17 @@
+package MAC
+
+import chisel3._
+import chisel3.util
+
+
+
+class MACBase extends Module {
+
+  class MACIO extends Bundle{
+    
+  }
+
+
+}
+
+
diff --git a/src/main/scala/mac/MII.scala b/src/main/scala/mac/MII.scala
new file mode 100644
index 0000000..0a6c8e5
--- /dev/null
+++ b/src/main/scala/mac/MII.scala
@@ -0,0 +1,11 @@
+package MAC
+
+import chisel3._
+import chisel3.util
+
+
+class MIIBase extends Module{
+  class MIIIO extends Bundle{
+    
+  }
+}
\ No newline at end of file
diff --git a/src/main/scala/mac/MacRx.scala b/src/main/scala/mac/MacRx.scala
new file mode 100644
index 0000000..869c69c
--- /dev/null
+++ b/src/main/scala/mac/MacRx.scala
@@ -0,0 +1,6 @@
+package MAC
+
+import chisel3._
+import chisel3.util
+
+
diff --git a/src/main/scala/mac/MacStatus.scala b/src/main/scala/mac/MacStatus.scala
new file mode 100644
index 0000000..fa1307d
--- /dev/null
+++ b/src/main/scala/mac/MacStatus.scala
@@ -0,0 +1,5 @@
+package MAC
+
+import chisel3._
+import chisel3.util
+
diff --git a/src/main/scala/mac/MacTx.scala b/src/main/scala/mac/MacTx.scala
new file mode 100644
index 0000000..d975840
--- /dev/null
+++ b/src/main/scala/mac/MacTx.scala
@@ -0,0 +1,7 @@
+package MAC
+
+import chisel3._
+import chisel3.util
+
+
+