Walter Banks wrote:

>   Most silicon companies document sequences that have potential
>   problems in some applications.

  Or someone documents it for them.  Like the infamous Pentium HCF
instruction (sequence).

  Reminds me of my work machine's trick, much less frequent now I
extracted the loom wiring from the cooling fan (blades) and glued it
down elsewhere, but still intermittent, of crashing at 17:30 +/- 5
minutes local time.  It's uncanny!
--
  Cheers,
        Paul B.
I do have a virus checker.