diff --git a/opcodes/Dx_regs_field_A.v b/opcodes/Dx_regs_field_A.v
new file mode 100644
index 0000000..42bc559
--- /dev/null
+++ b/opcodes/Dx_regs_field_A.v
@@ -0,0 +1,27 @@
+/******************************************************************************
+ * Dx
+ * register manipulation field A
+ *
+ */ 
+
+
+`include "decstates.v"
+
+`DEC_DX: begin
+    case (nibble)
+    4'hA: begin
+        A[19:0] <= C[19:0];
+        $display("%5h A=C\tA", inst_start_PC);
+    end
+    4'hE: begin
+        A[19:0] <= C[19:0];
+        C[19:0] <= A[19:0];
+        $display("%5h ACEX\tA", inst_start_PC);
+    end
+    default: begin 
+        $display("ERROR : DEC_DX");
+        decode_error <= 1;    
+    end
+    endcase
+    decstate <= `DEC_START;
+end