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Disclosed is a programming concept which reduces the need to update the entire display, instead updating only the area that changed.
English (United States)
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Disclosed is a programming concept which reduces the need to update the
entire display, instead updating only the area that changed.
When less than the entire display is updated, an algorithm has been
employed to determine what portion of the display has changed.
Variables called "min" and "max" are used. Initially, "max" is set to 0 and
"min" is set to "1919". A routine is passed the current "offset". If the "offset" is
less than "min", "min" is assigned the new "offset". Also, if the "offset" is greater
than "max", "max" is assigned the "offset".
Eventually, when the time comes to update the display, a check is performed
to see if "min" and "max" are different from their initial settings. If so, the starting
offset for the update is calculated using "min". "Min" and "max" are used to
compute a length for the update. The update takes place.
"Min" and "max" are reset to their initial values after the display update is