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From: Ollivier Robert <roberto@keltia.freenix.fr>
Message-Id: <199606122227.AAA06852@keltia.freenix.fr>
Subject: Re: BIOS poke for memsize(2) on SuperMicro P6DOF?
To: jko@vivid.autometric.com
Date: Thu, 13 Jun 1996 00:27:01 +0200 (MET DST)
Cc: bugs@freebsd.org, questions@freebsd.org
In-Reply-To: <9606121005.ZM27898@khan.autometric.com> from John Ko at "Jun 12, 96 10:05:15 am"
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It seems that John Ko said:
> Should the kernel be poking at a another location, is there
> another place ???

For FreeBSD, did you followed the FAQ's advice ? 

  8.6.	I have 128 MB of RAM but it seems that the system use only the
  first 64 MB. What's going on ?

  Due to the manner in which FreeBSD gets the memory size from the BIOS,
  it can only detect 16 bits worth of Kbytes in size (65535 Kbytes =
  64MB). If you have more than 64MB, FreeBSD will only see the first
  64MB. To work around this problem, you need to use the kernel option
  specified below. There is a way to get complete memory information
  from the BIOS, but we don't have room in the bootblocks to do it.
  Someday when lack of room in the bootblocks is fixed, we'll use the
  extended BIOS functions to get the full memory information...but for
  now we're stuck with the kernel option.

  ______________________________________________________________________

	      options "MAXMEM=<n>"
  ______________________________________________________________________


  Where n is your memory in Kilobytes. For a 128 MB machine, you'd want
  to use 131072

-- 
Ollivier ROBERT    -=- The daemon is FREE! -=-    roberto@keltia.freenix.fr
FreeBSD keltia.freenix.fr 2.2-CURRENT #10: Tue Jun 11 13:36:57 MET DST 1996