Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!uwvax!umn-d-ub!dross
From: dross@umn-d-ub.D.UMN.EDU (david ross)
Newsgroups: comp.sys.ibm.pc
Subject: AT keyboards, ports, and other things
Message-ID: <1111@umn-d-ub.D.UMN.EDU>
Date: 21 Jun 89 04:17:43 GMT
References: <10146@polya.Stanford.EDU>
Reply-To: dross@ub.d.umn.edu.UUCP (david ross)
Organization: University of Minnesota, Duluth
Lines: 11

In article <10146@polya.Stanford.EDU> stanton@Polya.Stanford.EDU (Scott Stanton) writes:
>Is it possible for an extended (101 key) keyboard to do chording on an
>AT (clone)?  i.e. Can I detect if more than one key is being pressed
>at the same time?  I have no qualms about going straight to the
>hardware interrupts on this one, assuming I can find any info on
>those.

I know of at least one word processing program that detects keypress
makes and breaks, and therefore lets you chord; I believe, however, 
they use port polling and not interrupts.  Unfortunately, port polling
will keep your program from working with many useful TSR utilities.