To confirm, most old Compaqs like this had a very basic BIOS that could not be easily flashed or upgraded, and a partition on the hard drive that contained most of the usual Setup information and as activated by hitting F10. You used to be able to download the F10 Setup utility from Compaq, don't know if you still can or not.

This was what made it so hard to install large hard drives in these machines; the Setup information needed to be changed before you installed the drive, but the Setup information was ON the drive... Catch-22...