Format of VINES port record block:
Offset	Size	Description	)
 00h	WORD	(call) number of 17-byte elements (01h-05h) to be filled
 02h	BYTE	(call) port type for first port
 03h 16 BYTEs	(ret) port (see #03328)
 13h	BYTE	(call) port type for second port
 14h 16 BYTEs	(ret) port (see #03328)
 24h	BYTE	(call) port type for third port
 25h 16 BYTEs	(ret) port (see #03328)
 35h	BYTE	(call) port type for fourth port
 36h 16 BYTEs	(ret) port (see #03328)
 46h	BYTE	(call) port type for fifth port
 47h 16 BYTEs	(ret) port (see #03328)
 57h	BYTE	reserved
SeeAlso: #03435