Int 21 Fn E6  O - Novell Netware - Copy File To File (fcb)                 [N]

   AH = E6h
   CX:DX = number of bytes to copy
   DS:SI -> opened source FCB
   ES:DI -> opened destination FCB

Return: AL = error code
   CX = ???
   DX = ???

Note:  this function was added in NetWare 4.0, but was removed some time prior
     to Advanced NetWare 2.15, and is no longer listed in current Novell
     documentation