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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!agate!howland.reston.ans.net!EU.net!Germany.EU.net!netmbx.de!zrz.TU-Berlin.DE!cs.tu-berlin.de!maelaren!uwp From: uwp@cs.tu-berlin.de (Udo Wolter) Newsgroups: comp.os.386bsd.development Subject: Re: DMA bounce-buffers now implemented in FreeBSD-current Followup-To: comp.os.386bsd.development Date: 25 Mar 1994 18:42:57 GMT Organization: Technical University of Berlin, Germany Lines: 41 Distribution: world Message-ID: <UWP.94Mar25194257@maelaren.cs.tu-berlin.de> References: <JKH.94Mar25161128@sentnl.ilo.dec.com> NNTP-Posting-Host: maelaren.cs.tu-berlin.de Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit In-reply-to: jkh@sentnl.ilo.dec.com's message of 25 Mar 1994 08:25:43 -0800 In article <JKH.94Mar25161128@sentnl.ilo.dec.com> jkh@sentnl.ilo.dec.com (Jordan Hubbard) writes: »Without getting overly 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 (I'll pause a moment for a round of applause from »those benefited :-). *applause* :-) Can anyone describe what DMA bounce buffers exactly do besides of allowing more than 16MB in an ISA machine ? »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! :) What does this exactly mean ? Does this mean that I really can use upto 32MB or will the system just ignore them and that I'll get no more errors if I have more than 16MB installed ? »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. That's ok. At the end of the money there's too much month, so it's better for me to wait before buying any memory...:-( Bye, Udo -- Udo Wolter INTERNET: uwp@cs.tu-berlin.de, wolter@db0tui11.cs.tu-berlin.de BITNET/EARN: WOLTER@DB0TUI11 WWW: http://www.cs.tu-berlin.de:/~uwp/