Int 7A  - Novell Netware - Ipx Driver - Open Socket                        [N]

   BX = 0000h
   AL = socket longevity
       00h open until close or terminate
       FFh open until close
   DX = socket number (high byte in DL)
       0000h dynamic allocation
       else  socket to open (see below)

Return: AL = return code
       00h success
       DX = socket number
       FEh socket table full
       FFh socket already open

Notes: TSRs which need to use sockets should set AL to FFh, non-resident
     programs should normally use AL=00h
   IPX can be configured to support up to 150 open sockets on a
     workstation, and defaults to 20
   this function is supported by Advanced NetWare 1.02+

See Also: BX=0001h,BX=0004h

Values for socket number:
 0451h File Service (NetWare Core Protocol)
 0452h Service Advertising Protocol
 0453h Routing Information Packet
 0455h NetBIOS Packet
 0456h diagnostics
 0457h server serial numbers (labeled "Copy Protection" by Lanalyzer)
 4000h-7FFFh used for dynamic allocation
 4444h Brightwork Development's SiteLock server
 5555h Brightwork Development's SiteLock client (workstation)
 8000h-FFFFh assigned by Novell

Note:  SiteLock is an application metering product using IPX to communicate
     between the application and the license server