Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!sdd.hp.com!hplabs!hpfcso!hpldola!jg
From: jg@hpldola.HP.COM (Joe Gilray)
Newsgroups: comp.sys.atari.st.tech
Subject: Micrortx call out functions?
Message-ID: <16960001@hpldola.HP.COM>
Date: 18 Jul 90 21:39:57 GMT
Organization: HP Elec. Design Div. -ColoSpgs
Lines: 22


I have gotten the shareware Micrortx kernel and have been playing with it.

Everything seems to work quite well.  It seems like a very powerful and
complete kernel.

Last night I tried to define a 'switch' call out function to simply
count the number of process switches.  First I tried to simply increment
a global variable in a C function, but this gave quirky and often
incorrect results.  After reading through the Micrortx documentation,
I thought the problem was that the C function was munging with the
registers so I wrote an assembly program that saves the registers
on the stack, increments the global variable, and restores the registers,
but this seems to invariably lock up my system.

Has anyone solved this problem?  Or done anything with the call-out
functions in Micrortx?

I am using the MWC 3.0.6 development package.

Thanks in advance
Joe Gilray