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From: catone@dsl.cis.upenn.edu (Tony Catone)
Newsgroups: comp.lang.pascal
Subject: Re: Reading Function Keys - Turbo Pasca
Message-ID: <2481@super.upenn.edu>
Date: Tue, 10-Nov-87 20:33:51 EST
Article-I.D.: super.2481
Posted: Tue Nov 10 20:33:51 1987
Date-Received: Fri, 13-Nov-87 03:34:52 EST
References: <1329@cup.portal.com> <126200001@iucs> <3575@uw-june.UUCP>
Sender: news@super.upenn.edu
Reply-To: catone@dsl.cis.upenn.edu.UUCP (Tony Catone)
Organization: University of Pennsylvania
Lines: 15

In article <3575@uw-june.UUCP> marty@uw-june.UUCP (Marty Sirkin) writes:
>
>   This has nothing to do with the issue.  The scan code returned by the 
>*machine's* built-in interrupt is a 0, not a 27.  Only Tp 3.0 converts it
>to an escape.  Since no other key can possibly return a zero, that's why it
>is used
>						Marty Sirkin

If no other key can possibly return a zero, what do Ascii nulls return?
I know that they are mapped to Ascii code 3 by service request 7 of
intr 21 hex, but what does the BIOS do with them?

					- Tony
					  catone@dsl.cis.upenn.edu
					  catone@wharton.upenn.edu