FreeBSD-6.3 only detects 3GB of RAM

[lhecking at users.sourceforge.net]

fred writes:
> Hello all,
> 
> I am trying to fix an issue with my dual xeon ibm server, it only detects
> 3GB or RAM but I have 4GB:
[...]

 I have seen this problem under Linux on IBM Intellistations (6225).
 IBM pointed me to a tech document (the number of which I do not
 remember) that says when the machine detects more than 3GB, it uses
 some of that memory internally for ... stuff. Still, I find stealing
 1GB quite unacceptable.