> Dave:
>         I haven't checked all the bigger chips, but do know that on these
> little ones, the port pins remain *unchanged* after a master clear, except
> for that startup period where they're all tristated. Thus a reset would be
> reinitiated immediately after coming out of reset.

Interesting!  So you'd need at least an external RC to make that work.
Well, at least it wouldn't be flakey :)