Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!mips!daver!musashi.wpd.sgi.COM!des@musashi.wpd.sgi.COM
From: des@musashi.wpd.sgi.COM (Des Young)
Newsgroups: comp.sys.nsc.32k
Subject: AIC6250 Driver
Message-ID: <9106041504.AA11108@musashi.wpd.sgi.com>
Date: 4 Jun 91 15:04:58 GMT
Sender: @daver.bungi.com
Organization: Association for the Prevention of Polar Bears and Kangaroos
Lines: 17

Hi,
  at last a repost/followup/alternative. The O/S on my machine was upgraded
last week, simultaneously with the main file server's O/S. The combination
rendered me inactive for longer than could be believed (the two machines
are also from different vendors, different X implementations etc.).
  Anyway, I lost the mail with the timing diagrams about the 6250 problems.
Could the author resend them please?
  I am not an NS, my email address is des@pei.com
  I have been working on a 6250 driver, but I do not have it going yet.
What I did not understand from what I remember about the timing diagrams
is how come the transfers are in bursts of 4 ? If you are programming the
FIFO offset to be zero (required for async SCSI transfers), they should be
one at a time, unless the code fetch/execute time is longer than the SCSI
transfer time (surely not ?).
  I will look over the code Jordan posted on your behalf. What is your email
address ?
Cheers, Des.