INT 10 - VIDIO - SET VIDIO MODE
        AH = 0
        AL = mode
            0 = 40x25 B&W
            1 = 40x25 color
            2 = 80x25 B&W
            3 = 80x25 color
            4 = 320x200 graphics, 4 color
            5 = 320x200 graphics, 4-tone gray scale
            6 = 640x200 graphics, B&W
            7 = monochrome
            8 = 160x200 graphics, 16 color (PCjr/Tandy 1000)
            9 = 320x200 graphics, 16 color(PCjr/Tandy 1000)
           0Ah = 640x200 graphics, 4 color (PCjr/Tandy 1000)
           0Bh = reserved (used internally by EGA BIOS)
           0Ch = reserved (used internally by EGA BIOS)
           0Dh = 320x200 graphics, 16 color (EGA)
           0Eh = 640x200 graphics, 16 color (EGA)
           0Fh = 640x350 graphics, monochrome (EGA)
           10h = 640x350 graphics, 4 or 16 color (EGA)
           11h = ???x??? graphics, ??? colors (VGA)
           12h = ???x??? graphics, ??? colors (VGA)
           13h = ???x??? graphics, ??? colors (VGA)
           30h = ???x??? (AT&T 6300)
           40h = 640x400 graphics (AT&T 6300)
           60h = 400 line graphics+80 column text (Corona/Cordata BIOS v4.10+)
           61h = 400 line graphics (Corona/Cordata BIOS v4.10+)
           74h = 640x400 graphics (Toshiba 3100)
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