Int 21 Fn 6F00  U - Os/2 V1.x Fapi - "dosqmaxeasize" - Get Maximum Size O  [O]

   AX = 6F00h
   DS:SI -> DWORD buffer for maximum size of an extended attribute

Return: CF clear if successful
       AX = 0000h
       buffer filled
   CF set on error
       AX = error code

Note:  also supported by OS/2 v2.0+ Virtual DOS Machines

See Also: AX=5703h,AX=6C01h,AH=6Eh"OS/2"