*BSD News Article 71501


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From: Tom Torrance at home <tom@tomqnx.com>
Subject: Re: Help!  BSD doesn't recognize new Memory
In-Reply-To: <Dt53My.q9@info.elvisti.kiev.ua>
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Date: Tue, 18 Jun 1996 00:06:22 GMT
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On Mon, 17 Jun 1996, Andrew V. Stesin wrote:

> John Paul Campbell (jpc) wrote:
> : I just installed 2 16 meg simms.  BIOS found them just fine and even Win95
> : recognized them.  However both Linux and FreeBSD show only 16M (had 8
> : previously).   What else must be  done?
> 
> 	A shot to the dark:  do you have a "memory hole" enabled in
> 	your BIOS? Disable if yes.
> 
> 	Try to add some waitstates to RAM access, and between cache and
> 	RAM.
> 
> : Help please.
> 
> : Thanks in advance.
> 
> : John

Another shot in the dark --> does your kernel have the double buffering
support for DMA compiled into it? If not, it would not work properly with
more than 16 Meg.  DMA hardware cannot address above 16 Meg.
--
tom@tomqnx.com  Tom Torrance
27 Dayton Cr., Nepean Ont., Canada   K2H 7N8
My opinions are personal, and not those of my employer.