Int 2F Fn 3912  - Kingswood Ansi Display Driver - Set Compatibility Mode   [V]

   AX = 3912h
   BL = 03h
   CL = new mode (00h fast, FFh BIOS)

Return: AL = old compatibility mode
   SI,DI,DS,ES preserved

See Also: AX=3900h,AX=3912h/BL=04h