INT 16 - HP HIL Vectras - SET HIL Extended BIOS INTERRUPT NUMBER
        AX = 6F0Eh
        BL = new interrupt number (60h-6Fh,78h-7Fh)
Return: AH = status (00h = successful)
Desc:   allows the HIL Extended BIOS software to use a non-default interrupt
          number in case of an interrupt conflict with another application
Note:   called by MS Windows HPSYSTEM.DRV and HPEBIOS.386 to support the HP-HIL
          input system
SeeAlso: AX=6F0Dh,INT 6F"HP"

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