;in one file
  P0.1	BIT	080H.1
  P0.2	BIT	080H.2
  P0.3	BIT	080H.3
  P0.4	BIT	080H.4
;in another file
  Ad1		EQU	P0.1
  Ad2		EQU	P0.2
  Ad3		EQU	P0.3