INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - SET ZOOM OFFSET                 
	AX = 0008h
	BX = X start of zoom offset
	CX = Y start of zoom offset
Desc:	specifies the first byte of video memory to appear in the zoom window
Range:	unknown
Notes:	INT 61 is the default interrupt; the actual interrupt number can be
	  obtained by calling INT 16/AH=FFh
	not all vendors include the Tseng TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0006h"OPTIMA",INT 16/AH=FFh"OPTIMA"