The black screen is the BIOS
Start the computer & immediately tap the delete
to interrupt the "boot initializatin sequence" and
halt it at this screen.
This instruction applies to my PC.
Not all are the same.
Once there, the mouse does not work.
Mouse control needs the full Operating System,
and it's the "job" of the BIOS to load the OS.
It will stay in the "BIOS screen" until I press F10
or enter another key to exit.
The proper key commands are (mostly) displayed at the bottom
of the screen.
The arrow keys will highlight any of the listings.
Using the "enter" key will then make the choice.
My BIOS is called Phoenix Award BIOS.BIOS tutorial
will help explain.
I choose the second list heading on the left.
Advanced BIOS Settings
( or what I think of as "the boot sequence." )
use the arrow keys down to:
1st boot device
In each of the three boot devices
enter key/arrow combinations are
used to decide which ...
HDD, CD drive or Floppy Disk drive ... is chosen.
The computer BIOS program will always try
to boot the OS from the first device
If that is not possible
(say 1st device = Floppy Disk drive & NO DISK is present)
then it will go to the next "boot device".
I have two HDDs.
The primary one is "seen" as HDD 0
and it has winXP on it.
The secondary is "seen" as HDD 1
(and it also has winXP on it, but thats optional)
the CD-RW drive is "seen" as a CD-Rom
by the BIOS
( I think a DVD-RW would be, too)
If HDD 0 = winXP &
HDD 1 = win2000,
it will always "boot initialize" into winXP
if your 1st Boot Device is HDD 0
and your 2nd Boot Device is HDD 1.
If for instance, you have a Linux OS on CD.
You want to run that OS instead of winXP or win2000.
You would make
1st Boot Device = CD-Rom and have the CD in the tray when you power on
and start up the computer.
2nd Boot Device = HDD 0 (winXP) doesn't happen.
3rd Boot Device = HDD 1 (win2000) doesn't happen.
Each time you reset the boot sequence, and exit, it will do what you have set it to do.
There's more in the BIOS than just this part, but maybe it helps.
More info that I might not have exactly right.
BIOS programs do vary.
I think that winXP does not allow ANY other OS on it's installed HD.
I may be wrong,
with partitions of a HD utilized ... but the BIOS does not
to my understanding (in my experience, rather) recognize partitions of drives.
Maybe there is a way to configure that, too.
I don't know that from experience, though.
Hope some of this helps you, Melvinji