Martin Husemann wrote:

>The Page Segement Extensions (IIRC) allow the mapping of a 36 bit wide
>physical address range into the virtual 32bit addresss range.
>
In case anyone else is interested, there was a discussion regarding 
memory limits on OpenBSD.

http://people.cs.tamu.edu/bcollins/openbsd/obsd-memory-thread

Also, if some NetBSD developers want to test out some codes to extend 
i386 beyond the 4 Gig RAM limit, I'll have this machine here for a while 
longer. Let me know how I can help.

Regards,
Thomas