INT 13 - HyperDisk v4.01+ - ???
AX = 8EEFh
Return: CF set
AX = CS of HyperDisk resident code
???
Note:   identical to AX=8EEEh in HYPERDKX v4.21-4.30
SeeAlso: AX=8EEEh,AH=EEh

See also: 138EED

138EEF - HyperDisk v4.01+ - ???