Path: utzoo!attcan!uunet!ginosko!gem.mps.ohio-state.edu!tut.cis.ohio-state.edu!triceratops.cis.ohio-state.edu!karl
From: karl@triceratops.cis.ohio-state.edu (Karl Kleinpaste)
Newsgroups: comp.sys.ibm.pc.rt
Subject: Re: Slip for RT?
Message-ID: 
Date: 27 Sep 89 15:23:23 GMT
References: <684@cwjcc.CWRU.Edu>
Sender: news@tut.cis.ohio-state.edu
Organization: OSU
Lines: 22
In-reply-to: chet@cwns1.ins.cwru.edu's message of 26 Sep 89 15:15:15 GMT

chet@cwns1.ins.cwru.edu writes:
   Has anyone successfully run slip on an RT (preferably running AOS, but AIX
   info is welcome as well)?  Anything to look out for?  I'm looking for any
   kind of info I can get.

I'm running SLIP on RTs running Mach 2.5.  I'm told that the AOS
drivers are (largely?) what's in Mach.  I discovered a fencepost error
in the latest SLIP driver, what amounts to an off-by-1 error in
slinput() because it checks for noisy line packet overrun via (count
>= SLMTU) rather than (count > SLMTU).  A new Mach kernel with the
4.3-tahoe SLIP driver is working fine so far, but I have to do some
more testing before I'm fully convinced.

The async port driver on this system is deeply braindamaged.  I get
error messages on the console such as "asy0: overrun error" and
"slih6: undefined bit(s) in softlevel: 4" down to speeds as low as
1200bps.  The fact that the system wastes time chattering these
messages onto the console makes the problem worse.  I've done a rude
thing with Emacs to put a ^@ at the beginning of these messages, so I
don't see them any more.

--Karl