Int 2F Fn 48C2 - Pced/attrib - Installation Check [U]
AX = 48C2h
BL = 00h
Return: AX = 0000h if installed
BX = ATTRIB resident segment
Program: ATTRIB is a resident file attribute changer included as part of the
PCED package by Cove Software
Note: chains if BL <> 00h on entry
See Also: AX=48C0h,AX=48C1h,AX=48C3h