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z80 Assembly :: RE: graphics problem

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Author: KermMartian
Posted: 25 Mar 2013 12:59:36 am (GMT -5)

The graphDraw flag could be more accurately be called the graphDirty flag. When it is 1, the OS clears the screen and re-draws the axis and any enabled Y= (or whatever the current graph mode is) functions the next time the graphscreen is displayed. If it is 0, the OS keeps the screen as-is. It's the difference between modifying Y1 and putting a Y2 after an existing Y1.
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