INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - CENTER ZOOM WINDOW              
	AX = 0001h
	BX = X coordinate to center
	CX = Y coordinate to center
Desc:	Positions the zoom window such that the specified window-relative
	  coordinates appear as close as possible to the center of the
	  display.  Useful for scrolling and panning.
Range:	unknown
Notes:	INT 61h 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=0002h"OPTIMA",AX=0005h"OPTIMA"
SeeAlso: INT 16/AH=FFh"OPTIMA"