Int 10 Fn 1E06  - Video - Flat-panel - Contrast Control For Text/graphics  [V]

   AX = 1E06h
   BH = function
       bit 7: =1 set contrast control, =0 query contrast
       bits 6-0: reserved (0)
   ---if BH bit 7 set---
   BL = new normal/reverse video setting (see #0057)

Return: AL = 1Eh if function supported
       BH = results
       bit 7: query/set (copied from input)
       bits 6-4: reserved (0)
       bit 3: software contrast control supported for text
       bit 2: software contrast control supported for graphics
       bit 1: hardware supports independent control of contrast
             in text and graphics modes
       bit 0: set operation was successful (always clear on get)
       BL = active contrast setting (see #0057)

Note:  this function operates independently of AX=1E08h

See Also: AX=1E00h,AX=1E04h,AX=1E05h,AX=1E07h,AX=1E08h

Bitfields for Flat-Panel contrast control:
Bit(s) Description (Table 0057)
 7-2   reserved (0)
 1 high contrast for text
 0 high contrast for graphics

See Also: #0055,#0056