*BSD News Article 30884


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From: terjem@stud.cs.uit.no (Terje Normann Marthinussen)
Subject: Re: BusLogi 445S and DMA Channel (NEW ANSWER)
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Message-ID: <1994May27.160149.6187@news.uit.no>
Date: Fri, 27 May 1994 16:01:49 GMT
References: <JKH.94May27001218@nx.ilo.dec.com>
Organization: University of Tromsoe
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Jordan Hubbard (jkh@nx.ilo.dec.com) wrote:
: In article <2s2j80$1go@ebh.eb.ele.tue.nl> wjw@ebh.eb.ele.tue.nl (Willem Jan Withagen) writes:

:    Because this starts me wonder which kernel I should use with my 445S REV D
:    board under FreeBSD. I'm using the AHA kernel which works great for 16Mb
:    But I'm waiting for the 3.37 Eprom to go to 32MB. Should I use the BT 
:    kernels for FreeBSD

: You can use the Bt driver *now* for your Rev D board with 16MB - I do
: this now.  If we can get the bounce-buffering working for 1.1.5,
: you'll also be able to go to 32MB with it.  Whether or not the 3.37
: eprom fixes the >16MB DMA problem is, however, still an open question
: for ANY of the operating systems.  Buslogic claims success with 3.37,
: yet I've now seen more than a few reports that tend to indicate that
: they did NOT fix the problem.  If this is the case, then the worst
: that will happen with your FreeBSD 1.1.5 system is that it'll simply
: "bounce" DMA >16MB and be a very small degree slower, but it'll work.
: You'll know whether or not we got the bounce-buffer stuff working
: properly in 1.1.5 when you see the release notes!

I don't know if firmware 3.37 is the only thing needed. I got an entirely 
new board instead of the one I got originally. I think the Norwegian
distributor said that you needed a Rev. E card to get this fixed (I got
a Rev. E replacement).

Originally I had a Rev. A card and it is more than the firmware that is
different I think. The revision number etched into the backside of the
circuit board istelf has gone from Rev. A to B. I couldn't see any difference
on the board itself, but there is sveral chips of a different brand, and 
some others that I think have higher revision number (including the controller
chip itself).

Well, what I can say, is that the Rev. E card definately did fix my problem
with more than 16MB of memory with OS/2 at least. So I believe that Rev. E
cards should fix this under other OSs as well.

Terje Marthinussen
terjem@stud.cs.uit.no