Hi Alexandre!
When Alexandre Ostanine wrote to ALL on Friday May 02 1997, Alexandre was 
talking about NetBIOS.
 AO> I'm making my first steps in Networking, and from the first one
 AO> 've got a problem:
 AO> In  Windows API I've found information about interrupt 5CH from
 AO> NetBIOS and there was that I should call this (at least better to)
 AO> interrupt to have something from it.
 AO> The question is WHAT this interrupt does and can I use it to
 AO> exchange some data between two remote computers (programs)
 AO> If it is what I'm locking for  - PLEASE HELP me with information
 AO> about it
I don't know if it is what you are looking for, but I have all the data on 
:
=== Begin 5c.Dat ===
Interrupt Helper v1.0               N-5C
INT 5C - NetBIOS INTERFACE
 ES:BX -> network control block (NCB) (see #2500)
Return: AL = status (see #2499)
Program: NetBIOS was developed by Sytek, Inc. in 1984 as a high-level
   programming interface to the IBM PC Network; the first implementation
   was a ROM BIOS extension on Sytek's PCnet LAN adapter card, but many
   current networks support NetBIOS as the session layer.
Note: The Sytek PCnet card uses DMA 3.
SeeAlso: INT 2A/AH=01h,INT 2A/AH=04h,INT 5B"Extended NetBIOS"
(Table 2499)
Values for NetBIOS status:
 00h successful
 01h bad buffer size
 03h invalid NETBIOS command
 05h timeout
 06h receive buffer too small
 07h No-ACK command failed
 08h bad session number
 09h LAN card out of memory
 0Ah session closed
 0Bh command has been cancelled
 0Dh name already exists
 0Eh local name table full
 0Fh name still in use, can't delete
 11h local session table full
 12h remote PC not listening
 13h bad NCB_NUM field
 14h no answer to CALL or no such remote
 15h name not in local name table
 16h duplicate name
 17h bad delete
 18h abnormal end
 19h name error, multiple identical names in use
 1Ah bad packet
 21h network card busy
 22h too many commands queued
 23h bad LAN card number
 24h command finished while cancelling
 26h command can't be cancelled
 30h name defined by another process (OS/2)
 34h NetBIOS environment not defined, must issue reset (OS/2)
 35h required operating system resources exhausted (OS/2)
 36h maximum applications exceeded (OS/2)
 37h no SAPs available for NetBIOS (OS/2)
 38h requested resources not available (OS/2)
 40h Lana System Error
 41h Lana Remote Hot Carrier
 42h Lana Local Hot Carrier
 43h Lana No Carrier Detected
 44h unusual network condition
 45h-4Dh hardware error
 4Eh token ring is broken
 4Fh token ring error
 50h adapter malfunction
 F7h error in explicit INITIALIZE
 F8h error in implicit OPEN
 F9h TOKREUI internal error
 FAh hardware adapter testing
 FBh NetBIOS emulator not found
 FCh OPEN or OPEN_SAP failure
 FDh unexpected adapter closure
 FFh NetBIOS busy (command pending)
Format of NetBIOS Network Control Block:
Offset Size Description (Table 2500)
 00h BYTE command code (see #2501)
 01h BYTE return code (see #2499)
 02h BYTE local session number (LSN)
 03h BYTE "ncb_num" datagram table entry from ADD NAME
 04h DWORD -> I/O buffer
 08h WORD length of data in buffer
 0Ah 16 BYTEs remote system to call
 1Ah 16 BYTEs network name of local machine
 2Ah BYTE receive timeout in 1/2 seconds
 2Bh BYTE send timeout in 1/2 seconds
 2Ch DWORD -> FAR post handler /* int (far *ncb_post)(); */
 30h BYTE network adapter number on which to execute command
  00h-03h IBM NetBIOS specs
  F0h-FFh Eicon NABios interface (see also INT 7B"Eicon")
 31h BYTE command completion code (see #2499)
 32h 14 BYTEs reserved for network card
(Table 2501)
Values for NetBIOS command code field in NCB:
 10h start session with NCB_NAME name (call)
 11h listen for call
 12h end session with NCB_NAME name (hangup)
 14h send data via NCB_LSN
 15h receive data from a session
 16h receive data from any session
 17h send multiple data buffers
 20h send unACKed message (datagram)
 21h receive datagram
 22h send broadcast datagram
 23h receive broadcast datagram
 30h add name to name table
 31h delete name from name table
 32h reset adapter card and tables
 33h get adapter status (see #2502)
 34h status of all sessions for name (see #2504)
 35h cancel
 36h add group name to name table
 48h send data and receive data (LAN Manager NETBEUI.DOS)
 70h unlink from IBM remote program (no F0h function)
 71h send data without ACK
 72h send multiple buffers without ACK
 72h UngermannBass Register (conflicts with above function)
 73h UngermannBass SendNmc
 74h UngermannBass Callniu
 75h UngermannBass Calladdr
 76h UngermannBass Listenaddr
 77h UngermannBass SendPkt
 78h find name
 78h UngermannBass RcvPkt (conflicts with above function)
 79h token-ring protocol trace
 79h UngermannBass SendAttn (conflicts with above function)
 7Ah UngermannBass RcvAttn
 7Bh UngermannBass Listenniu
 7Ch UngermannBass RcvRaw
 7Dh UngermannBass SendNmc2
 7Fh Beame&Whiteside BWNB installation check (returns with return code and
   completion code both set to 03h, while invalid functions return only
   return code field set to 03h)
Note: OR any of the above except 70h with 80h for non-waiting call
Format of NetBIOS structure "astatus":
Offset Size Description (Table 2502)
 00h  6 BYTEs as_id
 06h BYTE  as_jumpers
 07h BYTE  as_post
 08h BYTE  as_major
 09h BYTE  as_minor
 0Ah WORD  as_interval
 0Ch WORD  as_crcerr
 0Eh WORD  as_algerr
 10h WORD  as_colerr
 12h WORD  as_abterr
 14h DWORD as_tcount
 18h DWORD as_rcount
 1Ch WORD  as_retran
 1Eh WORD  as_xresrc
 20h  8 BYTEs as_res0
 28h WORD  as_ncbfree
 2Ah WORD  as_ncbmax
 2Ch WORD  as_ncbx
 2Eh  4 BYTEs as_res1
 32h WORD  as_sespend
 34h WORD  as_msp
 36h WORD  as_sesmax
 38h WORD  as_bufsize
 3Ah WORD  as_names
 3Ch 16 name structures  as_name (see #2503)
Format of NetBIOS structure "name":
Offset Size Description (Table 2503)
 00h 16 BYTEs "nm_name" symbolic name
 10h BYTE  "nm_num" number associated with name
 11h BYTE  nm_status
Format of NetBIOS structure "sstatus":
Offset Size Description (Table 2504)
 00h BYTE number of sessions being reported
 01h BYTE number of sessions with this name
 02h BYTE number of outstanding receive datagrams
 03h BYTE number of outstanding ReceiveAnys
 04h var session structures (see #2505)
Format of NetBIOS structure "session":
Offset Size Description (Table 2505)
 00h BYTE local session number
 01h BYTE state
  01h listen pending
  02h call pending
  03h session established
  04h hangup pending
  05h hangup done
  06h session aborted
 02h 16 BYTEs local name
 12h 16 BYTEs remote name
 22h BYTE number of outstanding receives
 23h BYTE number of outstanding sends/chainsends
=== End 5c.Dat ===
NOTE: This information was extracted from Ralf Brown's Interrupt list. A very 
 good file. Recommended if you're doing anything with interrupts.
Chris
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