Int 13 Fn 5504  - Seagate - Get Controller Type???                         [d]

   AX = 5504h
   DX = drive (bit 7 set for hard disk)

Return: CF clear if successful
       AX = 4321h,4322h if Seagate controller
   CF set on error

See Also: AX=5505h,AX=5514h