fix for some a/ux hangs

[John Kullmann]

Hot off the presses! We recently uncovered a problem involving the
initialization and framing error handling of the on board (Mac II)
serial ports in a/ux. If you are running a/ux with an appletalk cable plugged
in you might experience complete system hangs (the system is hung
trying to service errors on the serial port, since appletalk is running
at approx 230KBit/sec). Thanks to km at emory for a posting that prompted
me to suggest this fix to him. It worked for him, maybe it will help
some others. So, for now, unplug those appletalk cables when running
a/ux.
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John Kullmann			"All opinions and comments are mine alone"
A/UX Technical Mgr		..!apple!jk
Voice: 408-973-2939