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"