Int 6F Fn 80  - 10net V5.0 - Login                                         [N]

   AH = 80h
   DS:DX -> login record (see below)

Return: CF clear if successful
       BL = number of days until password expires (00h = never)
       CL = security level
   CF set on error
       AX = status (see AH=00h)

See Also: AH=00h,AH=81h

Format of login record:
Offset Size    Description
 00h  8 BYTEs  user name
 08h  8 BYTEs  password
 10h 15 BYTEs  server node ID
 1Fh  8 BYTEs  new password
 27h   BYTE    invoke mode (00h command line, 01h interactive)