Updating system bios
Generally, there is no mouse capability in the BIOS.
Most all interaction uses the up/down arrows, the page up/down buttons and the ENTER key.
If you hit the ENTER key, you get the screen below.
This is the screen where you set the system clock and set several of the drive parameters.
As you can see, this BIOS is for a motherboard purchased in 2005.
Some of the newer motherboards have mouse capability but can be navigated with the arrow keys as well.
If you're going to buy a motherboard and want to be able to use a mouse when working with the BIOS presets, look for one with a UEFI BIOS interface.
Luckily, most of the newer BIOS' set/read the drive parameters automatically.
On the screen above, I scrolled down to the 'Primary IDE Drive' and hit ENTER. In this machine, the primary IDE drive is a 40GB Samsung drive. Here, we want to let the BIOS set the parameters if the drive is capable.
The BIOS section of the manual will tell you what you need to know about the BIOS settings.