Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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    The range of valid (x,y) coordinates and possible pixel values depends
    on the current video mode.
 
    Register BH is ignored for display modes that support only one page.
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