Int 6F Fn 8D  - 10net V5.0 - "who" - Enumerate Users On Network            [N]

   AH = 8Dh
   BX = service mask (see #3450)
   CX = length of buffer
   DS:DX -> buffer for array of Who data structures (see #3451)

Return: CF clear if successful
       CX = number of nodes matching service mask
       DS:DX buffer filled
   CF set on error
       AX = status (see #3411)

See Also: AH=0Dh

Bitfields for 10NET service mask:
Bit(s) Description (Table 3450)
 0 workstation
 1 file server
 2 print server
 3 de-spool server

Format of 10NET Who data structure:
Offset Size    Description (Table 3451)
 00h  8 BYTEs  user name
 08h 15 BYTEs  node ID
 17h  3 BYTEs  unique portion of Ethernet address
 1Ah   BYTE    Who group number
 1Bh   WORD    service mask (see #3450)
 1Dh   DWORD   serial number
 21h   BYTE    maximum concurrent users with same serial number allowed on net
 22h   BYTE    chat mask (see #3452)
 23h   BYTE    internal system bits (see #3453)
 24h  9 BYTEs  version number in format MM.mm.xxx
 2Dh   BYTE    number of shared directories
 2Eh   BYTE    number of shared printer queues

Bitfields for 10NET chat mask:
Bit(s) Description (Table 3452)
 0 chat permitted
 1 bell enabled
 2 chat keyboard initiated
 3 in INT 16 handler
 4 in Get Input
 5 display has timed out
 6 chat is idle

Bitfields for 10NET internal system bits:
Bit(s) Description (Table 3453)
 0 submit permitted
 1 submit initiated
 2 submit executing
 3 internal client call/chat/spool/autospool
 4 in spool termination
 5 print permitted
 6 waiting for keyboard input