usb bios on Dell's Latitude D600

comp.arch.embedded
usb bios on Dell's Latitude D600

   Dell's D600 boots from a USB/CompactFlash adapter when running MSDOS 5.0 
with no Windows xxx included and shows expected USB capabilities of connecting 
to a keybord or mouse with Windows XP running & probably plain MSDOS too. I'd 
like to access these routines from a driver to be used under MSDOS, but 
finding documentation for Dell's bios has been a bust.
   If Dell has added the USB capabilities to bios in the same form as the disk 
(13h) or rs232 interface (14h), writing a driver would be simplified. It would 
seem likely, but Google showed nothing regarding access to the USB interface. 
Anyone know if there is any documentation of Dell's USB interface? The only 
code that's come to light so far goes directly to the PCI registers and not to 
an IBM style bios.
   The boot-time setup program on the D600 states the bios is version A16 and 
the copyright statements are for Phoenix Technologies 1985-88 and Dell 1990-
2005 which would indicate the USB interface code is Dell's handy work. 

Hul