X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 10 - video

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INT 10 - VIDEO - WRITE DOT ON SCREEN
        AH = 0Ch
        AL = color of dot (0/1 in mode 6, 0-3 in modes 4 and 5)
             if bit 7 set, new color will be XORed with current pixel
        BH = display page (ignored if mode only supports one page)
        CX = column
        DX = row
Note:   only valid in graphics modes
SeeAlso: AH=0Dh

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