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INT 10 - VIDEO - GETINFO (Video7 VGA,VEGA VGA)
        AX = 6F01h
Return: AL = monitor type code (VEGA VGA only)
        AH = status register information
             bit  0 = display enable
                        0 = display enabled
                        1 = vertical or horizontal retrace in progress
             bit  1 = light pen flip flop set
             bit  2 = light pen switch activated
             bit  3 = vertical sync
             bit  4 = monitor resolution
                        0 = high resolution (>200 lines)
                        1 = low resolution (<=200 lines)
             bit  5 = display type
                        0 = color
                        1 = monochrome
             bits6,7= diagnostic bits
Note:   bits 0-3 are the same as the EGA/VGA status register bits 0-3