Update pwr_FAC2_MEM

src/basic/math_trans/bf78.pwr_FAC2_MEM.s

@@ -3,9 +3,13 @@
 ;; #LAYOUT# *   BASIC_0 #TAKE
 ;; #LAYOUT# *   *       #IGNORE
 
-;
+; This file is under the MIT license, it contains code released by Microsoft Corporation.
+; See LICENSE for more information.
+
 ; Math package - set FAC1 as RAM raised to the power of FAC2
 ;
+; This is verified to be identical to the original Microsoft implementation where it had no name.
+;
 ; Input:
 ; - .A - address low byte
 ; - .Y - address high byte