Int 61 Fn 000F  - Banyan Vines - Open Socket                               [N]

   AX = 000Fh subfn 0001h
   CX:BX -> request block (see #3116)
   DX = application's data segment (should be = CX)
   ES = DS

Return: AX = status
       0000h successful
       00A5h resource not available
Desc:  Opens a socket and returns a socket handle

Format of request block:
Offset Size    Description (Table 3116)
 00h   WORD    0001h
 02h   WORD    magic number (FEFEh)
 04h   WORD    buffer for return code (set to 0 before calling)
 06h   WORD    reserved (will be set to client DS)
 08h   WORD    reserved (obviously not used; set to 0 before calling)
 0Ah   DWORD   far pointer to parameter block (see #3117)
 0Eh   WORD    process handle (see AX=000Fh/SF=0008h)

Format of parameter block:
Offset Size    Description (Table 3117)
 00h   WORD    reserved
 02h   WORD    address family (0003h = VINES)
 04h   WORD    socket type (0001h = IPC, 0002h = SPP)
 06h   WORD    protocol number (FFFFh = default protocol)
 08h   WORD    reserved
 0Ah   WORD    local port number (0 = transient, 1..1FFh = well-known port)
 0Ch   DWORD   far pointer to socket handle buffer (2 bytes)
 10h   DWORD   far pointer to IPC port buffer (16 bytes)

See Also: #3116