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Int 10h, 08h            Read Character and Attribute at Cursor

    Reports the ASCII value and (in text mode) attribute of the
    character at the current cursor location of the specified display
    page.

        Entry   AH = 08h
                BH = Display page number (text modes only)

        Return  AH = Attribute of character (text mode)
                AL = ASCII value of character

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    In graphics mode, the display page need not be specified, and the
    service returns 00h in AL if it does not recognize the character
    pattern (space or tab).