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Format of Video Parameter Dynamic Save Area [EGA, VGA only]:
Offset  Size    Description
 00h 16 BYTEs   Last data written to Attribute Controller Palette Registers 0-15
 10h    BYTE    Last data written to Attribute Controller Overscan Register
 11h-FFh        Reserved
                Note: Need for table was that EGA registers were write-only.
                Note: If default values (from the Video Parameter Table) are
                      over-ridden at a mode set by the VGA User Palette Profile
                      Table, then the Dynamic Save Area is updated with the
                      default values, not the User Profile ones.