INT 21 - VIRUS???

	AH = 4Ah
	BX = FFFFh
	CX = 0568h
	SI = 0129h
	DI = 0000h
	ES = BP
Return: ???
Note:	this call is intercepted by the Search&Destroy SDRes v27.03 bundled
	  with Novell DOS 7, and is presumably some virus's installation check
SeeAlso: AH=0Eh/DL=ADh,AH=4Ah/BX=00B6h