Int 10 Fn CC00  - Video - Ultravision - Get Status (installation Check)    [V]

   AX = CC00h
   SI = 0000h (if checking version)

Return: CX = ABCDh
   AL = Ultravision extensions
       00h enabled
       FFh disabled
   AH = card designator
   BX:00F0h -> palette values (for compatibility with NEWFONT)
   DX = support for high resolution modes
       00h not active
       01h active
   SI = UltraVision version number (v1.2+), high byte=major,low byte=minor
      = unchanged for versions <1.2

See Also: AX=CC01h,AX=CC02h