Int 21 Fn FF00  - Topware Network OS V5.10+ - Get System Information       [N]

   AX = FF00h
   CL = what to get
       00h user information
       01h drive mapping
       02h printer server(s)
       05h local DOS drive number

Return: ES:BX -> desired information (see below)
Program: TopWare Network Operating System is manufactured by Grand Computer
     Company

Note:  this call is only supported on Workstations, not on the server

See Also: AX=FF04h,INT 2F/AX=FF00h

Format of user information:
Offset Size    Description
 00h   BYTE    node ID
 01h 15 BYTEs  user name
 10h   WORD    user number
 12h   BYTE    group number

Format of drive mapping [array]:
Offset Size    Description
 00h   BYTE    bits 6-0: drive number (1=A:, etc.)
       bit 7: this is a server drive
 01h  3 BYTEs  mapping drive (for example, "C:\")
 04h 64 BYTEs  current directory