INT 6A - DECnet DOS - LOCAL AREA TRANSPORT PROGRAM - INSTALLATION CHECK         
InstallCheck:	test for a signature area immediately preceding the interrupt
	  handler (see #03715)
SeeAlso: AH=01h/DH=FFh,INT 6B"DECnet",INT 6D"DECnet"
Index:	installation check;DECnet DOS Local Area Transport


Format of DECnet DOS signature area:
Offset	Size	Description	(Table 03715)
 -5	BYTE	major version number
 -4	BYTE	minor version number
 -3   3 BYTEs	signature (ASCII "LAT")