1GB system working with 64MB

[Edouard Soriano <e_soriano@dapsys.com>]

Hello Folks,

Environment: linux 2.2.16smp
RedHat 7.0

I am setting up a system with 1GB RAM recongized by the
BIOS during power-on procedure.

This system having troubles, I set a top command and
with surprise I got this  status:

  4:33pm  up  4:42,  3 users,  load average: 4.18, 2.01, 1.09
125 processes: 123 sleeping, 2 running, 0 zombie, 0 stopped
CPU0 states:  9.1% user,  9.0% system,  8.0% nice, 80.1% idle
CPU1 states: 20.0% user,  6.1% system, 20.1% nice, 72.0% idle
Mem:    63892K av,   62480K used,    1412K free,   15076K shrd,    5192K 
buff
Swap:  514040K av,  260556K used,  253484K free                   11804K 
cached

My problem are the 63892K

I remember there is a solution to turn around this problem
forcing LILO to configure 1GB saying, I think but not 
sure:

append='memory=1024'

I searched in the lilo doc for memory parameter definition, but
as being coverd by append parameter I found nothing.

Question 1:
Do you have an idea about the reason Linux is using 64MB ?

Question 2:
Is this append command correct to turn out this problem ?

Question 3:
Where can I found informations about append variables wich
are related in fact with modules parameters ?
How to find on source code which module will read the 
memory parameter ?

Thanks in advance.

Bye