On Tuesday 19 February 2013 22:13:01 Frans-Pieter Vonck wrote: > VAR led1: LED.led; > LED.SwitchOn(led1); (Modular style) > than with, > led1.SwitchOn. (object style) How about mov dx, port mov al, LedBit or al, LedBit out al, dx -- Met vriendelijke groeten, Jan Verhoeven http://www.verhoeven272.nl