minimum requirements

[Farcas Felix]

look at:
http://lists.freebsd.org/pipermail/freebsd-doc/2006-August/011029.html

or:
FreeBSD 6.1-RELEASE:
4MB, 8MB: Dies at bootstrap loader.
12MB, 16MB: Dies while loading acpi.ko.
20MB: Boots / Successfully installed the default minimal distribution set.
Mem: 2484K Active, 1396K Iact, 6004K Wired, 680K Cache, 1984K Buf, 348K 
Free Swap: 7184K Total, 2732K Used, 4452K Free, 38% Inuse