Date: Tue, 18 Jun 1996 20:26:04 +0000 From: Carlos Amengual <amengual@sadeya.cesca.es> To: David Llamas <dlg@abaforum.es> Cc: questions@FreeBSD.org Subject: Re: FreeBSD Server with 128 Mbytes RAM Message-ID: <31C710DC.63E7@sadeya.cesca.es> References: <31C6D9F1.416C@abaforum.es>
next in thread | previous in thread | raw e-mail | index | archive | help
David Llamas wrote:
>
> Hi!. I have one FreeBSD server with 128 Mbytes of RAM, and FreeBSD only
>recognize 64 Mbytes.
Hi David !
>From an earlier message (and from the FAQ):
-----------------------------------------------------------------------
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
-----------------------------------------------------------------------
See you
--
==========================================================
Carlos Amengual - Sociedad Astronómica de España y América
Avenida Diagonal, 377, 2 - 08008 Barcelona - Spain
amengual@sadeya.cesca.es - http://www.sadeya.cesca.es/
==========================================================
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?31C710DC.63E7>