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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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     In video modes that support multiple pages, these functions affect
     only the page currently being displayed.
 
     If AL contains a value other than 00h, the area within the
     specified window is scrolled by the requested number of lines.
     Text that is scrolled beyond the top or bottom of the window is
     lost. The new lines that appear at the bottom of the window are
     filled with ASCII blanks carrying the attribute specified by
     register BH.
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