There seems to be a different sequence that affects Cyrixes though.
See <http://www.heise.de/ct/art_ab97/9713030/>. If you don't
understand German you will probably want to skip down to the
assembler code at the bottom of the article.
I don't have a Cyrix, so I can't test it, but it seems to me
that the 'sti' must be unnecessary and impossible on Linux in
user mode. Apparently the effect of the loop is to stop the
handling of interrupts.
-- Erik Corry erik@arbat.com