*BSD News Article 28574


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Newsgroups: comp.os.386bsd.questions
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From: eloy@paramount.nikhefk.nikhef.nl (Eloy Domingos)
Subject: Re: FreeBSD died on P560 with 32megs ram
Message-ID: <1994Mar17.095541.29513@paramount.nikhefk.nikhef.nl>
Organization: NIKHEFK
References: <MARK.876.2D87ACA4@ardsley.business.uwo.ca>
Date: Thu, 17 Mar 1994 09:55:41 GMT
Lines: 14

MARK@ardsley.business.uwo.ca (Mark_Bramwell) writes:

>My 486-50 has 16megs of ram and an adaptec 1542.
>The P560 has 32megs of ram and an adaptec 1540.  Could the extra ram kill 
>the adaptec 1540?

Yes, could be, if you have an ISA bus. The adaptec accesses the memory through
DMA, which can only be to the lower 16MB on an ISA bus.

Alas FreeBSD has not (yet?) a provision to copy the data first to lower 16MB
and then copy it above this border.

At the moment this is preventing me from useing FreeBSD on my PC at home
since I don't want to pull out the memory each time I boot FreeBSD :(.