Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!waikato.ac.nz!COMS0051
From: COMS0051@waikato.ac.nz
Newsgroups: comp.os.xinu
Subject: Context saving and time-slices
Message-ID: <8906150606.AA18021@nsipo.arc.nasa.gov>
Date: 15 Jun 89 06:06:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 12

From underneath you all up there I have been cracking this problem in the
same way by retaining the interrupted state - which may, in fact be nested
in the environment to which we have ported xinu (Vero VME-based single
board CPU - 68010).
     The nested interrupt problem also raises difficulties with saving
the "reason" - particularly for software originated interrupts.   There
is no difficulty - it just takes up another slot on the stack.

     Just to whet anyone's appetite we are just starting to convert
xinu from C (which we don't like to use if we can avoid it) to Modula-2.

     Keith Hopper