Format of VINES argument block for Function 0003h subfunction 01h:
Offset	Size	Description	)
 00h	BYTE	session ID (00h)
 01h	BYTE	01h (function "send to host")
 02h	BYTE	type
		00h ASCII byte
		01h ASCII string
		02h terminal function code
		03h up arrow
		04h down arrow
		05h left arrow
		06h right arrow
		07h break
 03h  N BYTEs	type-specific info (see #03375)