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Received: by minnie.vk1xwt.ampr.org with NNTP id AA1280 ; Tue, 23 Feb 93 14:33:36 EST Newsgroups: comp.unix.bsd Path: sserve!manuel.anu.edu.au!munnari.oz.au!uunet!UB.com!pacbell.com!ames!agate!spool.mu.edu!yale.edu!newsserver.jvnc.net!gmd.de!Germany.EU.net!mcsun!ieunet!dec4ie.ieunet.ie!jkh From: jkh@whisker.lotus.ie (Jordan K. Hubbard) Subject: Re: 386BSD Machine Configurations > 16Megabytes In-Reply-To: jones@acsu.buffalo.edu's message of 13 Feb 93 15: 12:20 GMT Message-ID: <JKH.93Feb13170535@whisker.lotus.ie> Sender: usenet@ieunet.ie (USENET News System) Nntp-Posting-Host: whisker.lotus.ie Organization: Lotus Development Ireland References: <C2E7KL.1sx@acsu.buffalo.edu> Date: Sat, 13 Feb 1993 17:05:35 GMT Lines: 21 In article <C2E7KL.1sx@acsu.buffalo.edu> jones@acsu.buffalo.edu (T. Jones) writes: I have seen this question posed before but do not recall seeing any definitive responses. I wanted to know what it would take to configure an ISA machine running 386BSD with greater than 16 meg of memory and a 1542 host adapter. Is the issue of DMA addressing beyond the 16 meg limit (bounce buffers) handled by Julian's SCSI driver? If not, what would it take? Julian's drivers won't handle this. You'd need to implement some sort of copy-down scheme to make sure the DMA buffers were in the lower 16MB. 386bsd doesn't adequately use memory >16MB anyway, so I'd say that your price/performance ratio isn't worth purchasing an extra 16MB if it's just to get better performance out of 386bsd, at least not for now. Jordan -- Jordan Hubbard Lotus Development Ireland jkh@whisker.lotus.ie 386bsd Patchkit Coordinator All-around nice dude. I don't speak for Lotus, Ok? They're HUUUUUUGE and I'm like Reeeeal Smaaaall.