Int 61 Fn 0006  - Optima 1024 VGA-sync,et-3000 Chipset - Set Zoom Window   [V]

   AX = 0006h
   BX:CX -> zoom window description (see below)

Notes: width of zoom window must be a multiple of the pixel replication (zoom)
     factor
   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 which supports these functions

See Also: AX=0000h"OPTIMA",AX=0001h"OPTIMA",AX=0005h"OPTIMA",AX=0008h"OPTIMA"

See Also: INT 16/AH=FFh"OPTIMA"

Format of zoom window description:
Offset Size    Description
 00h   WORD    X start of zoom window
 02h   WORD    Y start of zoom window
 04h   WORD    X end of zoom window
 06h   WORD    Y end of zoom window