LR>>So what is VX Works?  I know UNIX can be tuned to handle Real-Time
LR>>applications but can OS/2 be tuned to handle Real-Time LR>>apps.
Can either be done without the source for either LR>>operating system?

LR>>Right now I don't see how anyone can, in a reliable manner,
LR>>assure any client that either of these operating systems
LR>>will meet their REal-Time process control needs without the
LR>>very real option of modifying the operating systems
LR>>involved - as necessary.

LR>>'C' was supposedly written to allow development of
LR>>operating systems.  I think I can agree this can be done
LR>>with 'C' but not with time critical systems like Real-Time
LR>>process control where high speeds are crucial and where
LR>>memory constraints may exist.

Sorta depends on what they mean by "real-time".  What's the time
resolution?  If it's on the order of milliseconds you might consider the
use of an ARTIC (A Real Time Interface Coprocessor) card, available from
IBM and possibly others.  They come with either serial or GPIB
interfaces, as I recall, for both Microchannel and ISA buses.  It has an
80186 on board and queues messages to/from the equipment so your main
processor can do other things (like run the operating system) and check
the queue when it has time.  I've used these under OS/2 1.3 to monitor
process and measurement tools, though we never needed to poll as often
as every couple of milliseconds.
___
 X SLMR 2.0 X To a cat, "NO!" means "Not while I'm looking".

--- Maximus/2 2.01wb