From: Mike Little <MikeL AT amprsoft DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Porting real-time, multiprocess, distrib. OS Kernel to djgpp?
Date: Sun, 10 Nov 1996 14:43:39 GMT
Organization: Ampersoft &
Lines: 42
Message-ID: <276440209wnr@amprsoft.demon.co.uk>
References: <Pine DOT SGI DOT 3 DOT 93 DOT 961108120306 DOT 6837A-100000 AT gibson DOT eee DOT upd DOT edu DOT ph>
Reply-To: MikeL AT amprsoft DOT demon DOT co DOT uk
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article: <Pine DOT SGI DOT 3 DOT 93 DOT 961108120306 DOT 6837A-100000 AT gibson DOT eee DOT upd DOT edu DOT ph> 
 Orlando Andico <orly AT gibson DOT eee DOT upd DOT edu DOT ph> writes:
> 
> On Fri, 8 Nov 1996, Mark Habersack wrote:
> 
> [...]
> > But the absolute record here is the QNX OS kernel - 10 KB in PROTECTED
> > MODE!!! How about that?
> > 
> 
> Yes, that may be so.. :)
> I have all the technical documentation for QNX and it is a very impressive
[SNIP]
> But: and this is a very large "but"...
> Does anyone know the COST of QNX? it's in the several-hundreds of US$
> range. Now if all you're concerned about is saving $$$ by saving memory,
> QNX, even though it has a very small memory footprint, is a net loss.
> 
> Sure, I need 16MB to run Linux decently with X Windows, true. But how much
> does 16MB of RAM cost? around US$ 100 the last time I checked. So, it's
> cheaper to just buy tons of memory than scrounge around for little scraps
> with a small OS.

The real reason for buying QNX is that it is REAL TIME. Real REAL TIME, with 
deterministic response times and all that (I think that's the correct 
phrase). I used to work for a company that sold a PLC simulator that ran on 
QNX. It had real time simulated I/O and everything. 

BTW, it _IS_ very expensive, and the base package doesn't even come with 
much more than a shell and a few utils. X, Compiler's etc, are extra.

Anyway, this is definately getting off-topic!

Mike,

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