CONTROL_REG	DATA	0x20
RELAY_A		BIT	CONTROL_REG.0		; relay control: 0 - on; 1 - off
;...
MOTOR_1		BIT	CONTROL_REG.7		; motor control: 1 - on; 0 - off

; somewhere in program:
	CLR	RELAY_A				; switch relay A on
	SETB	MOTOR_1				; run motor 1
; ...
	CLR	MOTOR_1				; stop motor 1
	SETB	RELAY_A				; switch relay A off