Int 10 Fn 4F09  - Vesa Supervga Bios V2.0+ - Get/set Palette Entries       [V]

   AX = 4F09h
   BL = subfunction
       00h set (primary) palette
       01h get (primary) palette
       02h set secondary palette data
       03h get secondary palette data
       80h set palette during vertical retrace
   CX = number of entries to change
   DX = starting palette index
   ES:DI -> palette buffer (see #0084)

Return: AL = 4Fh if function supported
   AH = status
       00h successful
       01h failed

See Also: AX=4F0Ah,AX=D000h"S3VBE"

Format of VESA VBE palette entry:
Offset Size    Description (Table 0084)
 00h   BYTE    red
 01h   BYTE    green
 02h   BYTE    blue
 03h   BYTE    alpha or alignment byte