[newbie] Memory not found

[Gregory S. Hackman]

Hi,

I recently installed Mandrake 6.0 on a Gateway PIII PC with 256 Mb ram.
When I check the memory in use with the "top" command, it says I only have
something like 64 Mb.  The appropriate KDE utility tells me the same thing.

Is there some bug in the 2.2whatever kernel that it can't use the other 192
Mb?  Is there some initialization file I need to change?  I intend to use
this PC as a serious number-crunching workstation so I'd really like to use
all the ram I paid for.

Thanks...Greg Hackman