On Fri, Jun 24, 2005 at 12:43:29PM -0700, Wolfgang S. Rupprecht wrote: > > I'm trying to understand what I need to do to make the last 500Meg of > my 4GB memory visible on a FC4 x86_64. I assume that the 3.5GB - 4GB > area is being used for hardware and I need to arrange for the memory > to be mapped elsewhere. Correct, you'll need some space in the lower 4GB for PCI to mapped. > My motherboard, a tyan k8e (s2865) has entries in the bios for > something called: > > S/W memory hole Remapping disable / enable > H/W memory hole Remapping disable / enable > MTRR mapping mode continuous / discrete > > It looked like one or both of the first two entries would do the > trick, but when I enabled them all that happened was my add-in network > card stopped working. At boot dhcp was unable to get an address and > booting hung at that point. This happened s/w or h/w remapping was > active (either singly or together. Hmm, usually such an option does the trick. Is there a newer BIOS you can try perhaps ? It's not really a problem that we can do anything about sadly. Dave