Compatibility: All
Expects: AH    0dH
BH    video page (0-based)
CX    graphics column
DX    graphics row
Returns: AL    color value of dot at specified position
Info: This obtains the color value of the dot at the specified graphics
screen location.

The BIOS provides very little graphics drawing support.  To use
graphics with reasonable speed, you must access video memory
directly.  See Video Memory Layouts.

See Also: INT 10H 0cH (write graphics pixel)
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INT 10H 0dH: Read Graphics Pixel