INT 1A U - Disk Spool II v2.07+ - ALTERNATE INSTALLATION CHECK
AH = C0h
Return: (see AH=A0h)
Notes: this call is identical to AH=A0h
this function is also supported by Vertisoft's Emulaser utility ELSPL,
as that is a licensed version of Disk Spool II
SeeAlso: AH=A0h,AH=ABh,AH=D0h