Code:
bios0 at mainbus0: AT/286+ BIOS, date 09/21/05, BIOS32 rev. 0 @ 0xffe90, SMBIOS rev. 2.3 @ 0xfa4c0 (82 entries)
bios0: vendor Dell Computer Corporation version "A05" date 09/21/2005
bios0: Dell Computer Corporation PowerEdge 1800
According to
http://support.dell.com they recommend the "A07" version of the BIOS from November 2006.