Int 61 Fn 0004  - Optima 1024 VGA-sync,et-3000 Chipset - Enter Specify Mo  [V]

   AX = 0004h

Notes: Specify Mode is enabled by hot key (seeAlso below), and allows
     panning and zooming via the numeric keypad.
   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=0007h"OPTIMA",INT 16/AH=FFh"OPTIMA"