Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!tut.cis.ohio-state.edu!pt.cs.cmu.edu!cadre.dsl.pitt.edu!pitt!yubing@vax.cs.pitt.edu
From: yubing@vax.cs.pitt.edu (Bing Yu)
Newsgroups: comp.lang.pascal
Subject: Readkey without "use crt" (Was Re: Strobing the keyboard)
Keywords: keyboard strobe strobing
Message-ID: <6233@pitt.UUCP>
Date: 16 Nov 89 02:39:17 GMT
References: <1261@rodan.acs.syr.edu: <79164@linus.UUCP>
Sender: yubing@pitt.UUCP
Reply-To: yubing@vax.cs.pitt.edu (Bing Yu)
Distribution: usa
Organization: Univ. of Pittsburgh Computer Science
Lines: 30

In article <79164@linus.UUCP: carlson@gateway.mitre.org (Bruce Carlson) writes:
:In article <1261@rodan.acs.syr.edu> wwtaroli@rodan.acs.syr.edu (Bill Taroli) writes:
:>I believe this may have been discussed before, but I need this information
:>in a hurry.  Is anyone aware of a function in TP that will allow one to 
:>strobe the keyboard... or basically check the queue to see if a key is 
:>waiting to be read?
:>Bill Taroli
:>WWTAROLI@RODAN.acs.syr.edu
:
:The function KeyPressed (boolean) determines if a key has been pressed.  It
:is nondestructive, so the value is still in the keyboard buffer.
:It does not detect the 'shift' keys like Alt, Shift, Numlock, etc.
:
:The function ReadKey reads the value in the keyboard buffer, and you can
:then assign this value to one of your variables.  If it is a special 
:key (function key, etc.) that generates an extended scan code it will
:have two bytes.  The first is #0 and the second is the extended scan code.
:The extended scan code keys therefore require two executions of ReadKey.
:
:Bruce Carlson

I have a problem similar to this: I want to have a function same as
Readkey but do NOT want to "use crt".  The reason for this is that
I want to force the crt i/o go through dos so that it can be handled
by a driver similar to ansi.sys.  I tried read(input,c) but have to
press RETURN after the key is pressed.  Does anyone know how to make it
work?  Thanks.

Bing Yu
yubing@vax.cs.pitt.edu