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  Service 09H (decimal 9) establishes the disk-base tables for two
  fixed-disk drives for the PC/AT or PS/2 ROM BIOS. Call this service with a
  valid fixed-disk drive number in DL and with the interrupt 41H and 46H
  vectors containing the addresses of disk-base tables for two different
  fixed-disk drives. Because fixed disks are nonremovable, this service
  should only be used to install a "foreign" disk drive not recognized by
  the ROM BIOS or the operating system. For more details, see the IBM BIOS
  Interface Technical Reference Manual.

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  NOTE:
    Do not use service 09H for PS/2 ESDI drives.
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