[comp.realtime] What's a HARD real-time system ?

rhl@computing-maths.cardiff.ac.uk (Robert Hartill) (01/03/91)

I see the word HARD used to describe some real-time systems,
what does it mean ?

Only one reply per household please..

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::     Robert Hartill, Dept Of Computing Mathematics, UWCC, Cardiff, UK.     ::
::                       e-mail : rhl@cm.cf.ac.uk                            ::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
There is no alternative.
-Margaret Thatcher.
-------------------------------------------------------------------------------

yoke@iccgcc.decnet.ab.com (Michael Yoke) (01/04/91)

In article <1991Jan3.143057.7759@computing-maths.cardiff.ac.uk>, rhl@computing-maths.cardiff.ac.uk (Robert Hartill) writes:
> I see the word HARD used to describe some real-time systems,
> what does it mean ?
> 
> Only one reply per household please..
> 
> :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> ::     Robert Hartill, Dept Of Computing Mathematics, UWCC, Cardiff, UK.     ::
> ::                       e-mail : rhl@cm.cf.ac.uk                            ::
> :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> There is no alternative.
> -Margaret Thatcher.
> -------------------------------------------------------------------------------
A hard real-time system is one for which failure to meet a deadline is 
considered to be a catastrophic system failure.

Mike