*BSD News Article 29177


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From: wjw@ebh.eb.ele.tue.nl (Willem Jan Withagen)
Newsgroups: comp.os.386bsd.development
Subject: Re: FreeBSD-current now supports DMA bounce-buffers
Date: 29 Mar 1994 13:54:19 -0000
Organization: Digital Information Systems Group, Eindhoven University of Technology
Lines: 44
Distribution: world
Message-ID: <2n9buc$eff@ebh.eb.ele.tue.nl>
References: <JKH.94Mar25155604@sentnl.ilo.dec.com>
NNTP-Posting-Host: ebh.eb.ele.tue.nl

In article <JKH.94Mar25155604@sentnl.ilo.dec.com> jkh@sentnl.ilo.dec.com (Jordan Hubbard) writes:
=>  Without getting too verbose and being accused of blowing our own horn
=>  too loudly, I just wanted to announce that John Dyson and David
=>  Greenman have recently succeeded in adding DMA bounce buffer code to
=>  FreeBSD-current (a round of applause from those benefited).

Which is a nice thing, since I saw my new localbus box with 32Mb
and FreeBSD 1.0.2 wonder off into noman's land :-( using an adaptec 1542.
The only remedy was to pull 16Mb. :-( I already sort of knew this.

=>  What this means in plain english is that the lastest snapshot of
=>  FreeBSD enables those folks with more than 16MB of memory and an ISA,
=>  EISA (emulating ISA) or semi-broken VLB (Buslogic) SCSI controller
=>  card to function properly.  All those folks with 32MB of memory and
=>  Adaptec 1542 cards may now rejoice! :-)

I also have a BusLogic 445S Rev D with 3.36 BIOS, but that doesn't even 
boot with 32Mb. Friend informed me that I'd need a Rev E board with a 3.37
version BIOS for this. 

Calling the Dutch Buslogic import-person:
"Eh, uhm, ehhh. Yes, ehh..........
 There is going to be a jumperless board, but it's only going to be
 released by the end of april."
Fortunatly he agreed to let me use the Rev D. board until he had a
replacement.

=>  I am not yet sure whether or not we'll be able to add the functionality
=>  back into 1.1 without potentially destabilizing the release (which would
=>  not be in anyone's interest), so this may have to wait for FreeBSD 1.2
=>  to see the "official" light of day.  Those who are willing to take
=>  the plunge may, of course, run -current from any time as of now.
=>  Should the situation regarding 1.1 change, I will be sure to let all
=>  of you know.

Given the current state of affairs with VESA manufacturers it will be a
GOOD thing when bounce buffers make it into the release.

	WjW
-- 
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