INT 2F U - NORTON UTILITIES 6.0 NCACHE - REBOOT
        AX = FE10h
        DI = 4E55h ("NU")
        SI = TSR identifier (see AX=FE00h)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI or 2020h)
        AX = status
Note:   probably used to flush NCACHE buffers and reboot when Ctrl-Alt-Del is
          detected
SeeAlso: AX=FE03h

.