Int 15 Fn 86  - Hunter 16 - Get/set Screen Attribute Table                 [b]

   AH = 86h
   AL = function (00h get, nonzero set)
   BX = 1234h
   DS:SI -> 256-byte Attribute buffer

Note:  In text modes each character has its attribute byte XOR'd with the
     corresponding byte in the attribute table.  If the attribute is 15,
     15 is XOR'd with Table[15]