Path: utzoo!attcan!uunet!jarthur!usc!snorkelwacker!bloom-beacon!mcgill-vision!quiche!clement
From: clement@quiche.cs.mcgill.ca (Clement PELLERIN)
Newsgroups: comp.sys.next
Subject: Re: NeXT and Real-Time
Keywords: real time music mach ualarm paging operating system
Message-ID: <2285@quiche.cs.mcgill.ca>
Date: 27 Feb 90 18:57:30 GMT
References: <8196@pt.cs.cmu.edu>
Reply-To: clement@quiche.cs.mcgill.ca (Clement PELLERIN)
Organization: SOCS, McGill University, Montreal, Canada
Lines: 10

In article <8196@pt.cs.cmu.edu> jcd@maps.cs.cmu.edu (Jean-Christophe Dhellemmes) writes:
>I tried to use ualarm(3) to execute a function every millisecond (ualarm let
>you set up any interval between 1 and ~65000 microsecond) and found out that
>the NeXT machine can't keep up with that speed and that for any interval
>smaller than ~65000 (the max, i.e. 65 ms)

An unsigned is 32bits on the NeXT.
You can go up to 4 billion if you want, not just 64K.
I tried a sample program and I could easily get signals
at 1 second intervals.