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Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!osuunx.ucc.okstate.edu!moe.ksu.ksu.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!pipex!warwick!zaphod.crihan.fr!univ-lyon1.fr!frmug!renux.frmug.fr.net!keltia.frmug.fr.net!Ollivier.Robert From: Ollivier.Robert@keltia.frmug.fr.net (Ollivier Robert) Newsgroups: comp.os.386bsd.questions Subject: Re: Building a kernel larger than 640K Date: 9 Nov 1993 16:47:02 GMT Organization: Private FreeBSD Usenet Site Lines: 20 Distribution: inet Message-ID: <2bohik$1g1@keltia.frmug.fr.net> References: <2ahdk8$rjk@alva.ge.com> <JKH.93Oct26164254@whisker.lotus.ie> NNTP-Posting-Host: keltia.frmug.fr.net Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: TIN [version 1.2 PL2] Jordan K. Hubbard (jkh@whisker.lotus.ie) wrote: > config "386bsd" at 0xFE100000 root on sd0 swap on sd0 When one builds such a kernel, are the 640 KB lost or do they get back into the memory pool ? From my experience, it seems that they're lost... > Not if you have an ISA bus you can't - this is still a limitation > of not having any DMA "bounce" buffers and has nothing to do with > where the kernel is loaded. Sorry! Do you plan to implement such bounce buffers or does one must get an EISA motherboard in order to use more than 16 MB ? I've heard that they are/were used by the floppy driver. I plan to go for EISA in a few months with an AHA-1742 but for the moment... -- Ollivier ROBERT Ollivier.Robert@keltia.frmug.fr.net A FreeBSD & PERL addict... PGP 2.3a Public Key on request