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From: J Giffen <jgiffen@hgo.net>
Subject: Re: Get_Immediate
Date: 1997/09/08
Message-ID: <34147715.1A91@hgo.net>#1/1
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References: <dewar.872196651@merv> <5tk5he$7rq$1@news.fsu.edu>
 <dewar.872304565@merv> <5tnreu$9ac$1@news.fsu.edu> <dewar.872395110@merv>
 <5u58oc$k096_002@ioffe.rssi.ru> <dewar.872873430@merv>
 <340DF1DD.2736@iop.com>
To: Jeff Glenn <jeff@iop.com>
Organization: Giffen Family
Reply-To: jgiffen@hgo.net
Newsgroups: 
 comp.lang.ada,sci.math.num-analysis,comp.software-eng,comp.theory,sci.math
Date: 1997-09-08T00:00:00+00:00
List-Id: <comp.lang.ada>


Jeff Glenn wrote:
> 
> Mr. Dewar,
> 
> I tried using Get_Immediate with GNAT (3.05) on Solaris and I didn't get
> the results I wanted.
> 
> What I got:
> 
> My program reads each key, and I don't have to type Enter, but it also
> echoes each key. When I type a key that sends an escape sequence, like
> an arrow key, all of the codes in the sequence are echoed, e.g. ^[[A,
> before my program gets the first character of the sequence. Also, some
> keys, like Ctrl-C did not get read by my program.
> 
> What I want:
> 
> I want to read without any echoing and be able to get all of the codes
> the keyboard can generate.
> 
> Can you tell me how to get these results?
> 
> Thanks!
> 
> Jeff Glenn
> 
> jeff@iop.com

It sounds like the computer's sampling rate to the keyboard is faster
than what the program is willing to accomodate.  This might be solved
by going into CMOS Setup and altering the keyboard sampling rate.  I'd
try slowing it down some.

ASCII for cursor right, left, up and down is 1C, 1D, 1E & 1F.  Other
keys have others.  A switch closure for a certain row and column on
the keyboard is picked up when a scanning frequency detects it and
sends the signal to the motherboard.