From: utzoo!decvax!harpo!duke!mcnc!unc!tucc!jde Newsgroups: net.micro Title: Re: duke.2216: apple pascal i/o Article-I.D.: tucc.2048 Posted: Fri Jun 18 08:57:07 1982 Received: Sun Jun 20 04:40:51 1982 If you prefer to not deal with assembly in Pascal to access bit mapped registers, then use 'btrix' variant records. A good review of how to do this is in a back issue of Byte (last fall sometime). It tells how to access the micromodem, but the variant record concept carries over very nicely to other peripherials.