[comp.os.xinu] Context saving and time-slices

COMS0051@waikato.ac.nz (06/15/89)

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