*BSD News Article 32780


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From: ljg@space.physics.uiowa.edu (Larry Granroth)
Subject: Re: 3com509 driver for FreeBSD??
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Date: Wed, 13 Jul 1994 00:59:00 GMT
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Patrick Rougeau (rougeau@bsd7.ensta.fr) wrote:
: we are getting trouble with the 3C509 driver and NetBSD
: and are trying to track it down.
: ---------
: we have seen on the same hardware
: ftp between a 486dx2-66 box and an hp 710
: linux 700ko/s no trouble anytime
: NetBSD writing to /dev/null or a fast scsi card 1.2Mo/s
: NetBSD writing to an ide drive 70ko/s (stopping and restarting ftp)
: anybody any clue?

I'm using the ep drivers with a 3c509 in a FreeBSD-1.1.5.1 system
and notice similar behavior writing to a SCSI disk on an Ultrastore 14F
(I think) controller.  I notice some weird options on the DOS setup disk
for modem baud rates and client/server . . . 
Does anyone know what these settings really mean?  Is the 3c509 programmed
to lock out interrupts for variable amounts of time or somesuch?
(Maybe the SCSI controller has similar configurations to be tweaked?)

larry-granroth@uiowa.edu