Date   : Tue, 28 Jan 1986 08:10:00 EST
From   : "John C. Klensin" <Klensin@MIT-MULTICS.ARPA>
Subject: Osborne1 Baud Rate

According to the tech manual (and we've tried it, it works), you can
switch from 300/1200 by 600/2400 by removing the jumper position J1 on
level E and later boards.  Solder and cut time on earlier boards, it
says, but we have no experience with them.
  The manual also gives instructions (which we have NOT tried) about
providing other combinations and cranking up the maximum to 9600.  They
appear to involve some moderately serious wiring work.  Do you need
them?
  Note that from our experience, the O1 is operating fairly close to the
hairy edge of its capabilities at 2400, and you should expect a bit of
general flakyness as a result.
  You can, incidentally, set up most any baud rate you want under
software control to the 6850.