INT 16 - HP HIL Vectras - GET HIL Extended BIOS INTERRUPT NUMBER
        AX = 6F0Dh
Return: AH = interrupt number (default 6Fh, 02h means 6Fh as well)
Note:   called by MS Windows HPSYSTEM.DRV and HPEBIOS.386 to support the HP-HIL
          input system
SeeAlso: AX=6F0Eh,INT 6F"HP"

.