Subject: Re: Need help with EXTMEM_SIZE option
To: port-i386@NetBSD.ORG, Brian Stark <>
From: Matthias Drochner <>
List: port-i386
Date: 12/07/1997 14:51:22
Excerpts from netbsd: 6-Dec-97 Need help with EXTMEM_SIZE .. Brian
Stark@siemens-psc. (2690*)

> It also says that
> the constant NKPDE needs to be increased. The FAQ recommends 16, so I
> increased the default value of 12 to 16.

16 is still not much. Try 31 (the maximum for 1.2).

> The value for real memory doesn't seem to make sense... I am not sure
> how it is calculated, but 128 * 1024 * 1000 = 131072000. This is the value
> that I am expecting to see, but for whatever reason, the system thinks
> there is an additional 2748416 bytes of memory.

MByte is 1024*1024. You have a usable physical memory
of 128*1024*1024 minus the ISA hole (384*1024) minus
1 page (4096).
(This page is claimed by the BIOS.)

NetBSD-current (and the upcoming 1.3) have some
improvements wrt large memory. (improved detection,
larger kernel address space)
I recommend an upgrade.

best regards