INT 61 - Banyan VINES - SET PORTS FOR A SERVICE
        AX = 0007h
        BX = 0004h
        DS:DX -> StreetTalk name of service
        DS:DI -> port record block (see below)
Return: AX = status (see AX=0007h/BX=0002h)
SeeAlso: AX=0007h/BX=0002h

Format of port record block:
Offset  Size    Description
 00h    WORD    number of 17-byte elements
 02h 17 BYTEs   element: byte 00h = input port type, 01h-10h = port
                (see AX=0001h#"Sosock" for port format)

.