Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!psuvax1!psuvm!tbc101 From: TBC101@PSUVM.BITNET (Thomas B. Collins, Jr.) Newsgroups: comp.lang.pascal Subject: Re: Clearing the keyboard buffer Message-ID: <89276.021637TBC101@PSUVM.BITNET> Date: 3 Oct 89 06:16:37 GMT References: <1169@krafla.rhi.hi.is> <48.filbo@gorn.santa-cruz.ca.us> Organization: Penn State University Lines: 21 In article <48.filbo@gorn.santa-cruz.ca.us>, filbo@gorn.santa-cruz.ca.us (Bela Lubkin) says: > >In article <1169@krafla.rhi.hi.is>, Karl Thoroddsen writes: >> While writing in TURBO 4.0 I've constantly encountered the problem >> of not being able to flush(clear) the keyboard buffer. > >Var Crud: Char; >.. > While KeyPressed Do Crud:=ReadKey; { Flush keyboard buffer } > If Crud = #0 then Crud := ReadKey; { Use in case of extended key code} If the last character in the buffer was "extended" (Alt-something, etc.), Keypressed will be false, but there will still be a value in ReadKey to be read. If you forget to read this, it can cause trouble later on... ------- Tom "Shark" Collins Since ICS is comprised of 2 people, my views tbc101@psuvm.psu.edu are the opinion of at least 50% of the company.