In message <Pine.BSI.3.96.980408134420.14648A-100000@pillbox.broder.com>, Jerem
y Cooper writes:
>
>If you use a VT style terminal as your console, reverse question marks
>will appear on the screen quite, mostly at the ends of prompts from the
>shell.  I used an oscilliscope to examine the signals actually being sent
>to the terminal and it I found that these reverse question marks
>correspond to characters with improperly formed stop bits.  We suspect
>the problem is some sort of corruption caused by improper interrupt
>handling.

I've also seen this happen on VT220s, but it had nothing to do with
NetBSD.  It was seemingly a symptom of setting the baud rate too high
and it not being able to keep up-- the question marks usually went
away (or happened very infrequently) at lower baud rates.

FWIW.

:: Mike ::