OSDev.org

Posted: **Sat May 27, 2006 8:53 pm**

Hey,
I'm trying to write a generic boot sector that can be used on hard drives and floppy disks with little change. The question I have is:

Is there a way to ask BIOS which drive the boot sector was loaded from?

That way I know which drive to load the second-stage bootloader from, etc.

Thanks,
Tyrel

Posted: **Sat May 27, 2006 9:16 pm**

Most BIOSes put the drive number in DL when they execute the boot code.

Posted: **Sat May 27, 2006 9:23 pm**

blip wrote: Most BIOSes put the drive number in DL when they execute the boot code.

Oh yeah... I think I already knew that at one point. Silly brain.
Thanks.

OSDev.org

Determine which drive was booted?

Determine which drive was booted?

Re:Determine which drive was booted?

Re:Determine which drive was booted?