Int 2F Fn B710  U - DOS 3.3+ Append - Get Version Info                     [-]

   AX = B710h

Return: AX = current APPEND state (see AX=B706h)
   BX = ??? (0000h in MS-DOS 3.30 and 5.00)
   CX = ??? (0000h in MS-DOS 3.30 and 5.00)
   DL = major version
   DH = minor version

See Also: AX=B702h