X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - format of video parameter table [ega, vga only]:

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Format of Video Parameter Table [EGA, VGA only]:
An array of 23 [EGA] or 29 [VGA] elements, each element being 64 bytes long.
Elements appear in the order:
 00h-03h        Modes 00h-03h in 200-line CGA emulation mode
 04h-0Eh        Modes 04h-0Eh
 0Fh-10h        Modes 0Fh-10h when only 64kB RAM on adapter
 11h-12h        Modes 0Fh-10h when >64kB RAM on adapter
 13h-16h        Modes 00h-03h in 350-line mode
 17h            VGA Modes 00h or 01h in 400-line mode
 18h            VGA Modes 02h or 03h in 400-line mode
 19h            VGA Mode  07h in 400-line mode
 1Ah-1Ch        VGA Modes 11h-13h

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