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Application background The background is the DE2-70 board, use the VGA line, and then switch as the zoom buttonSW3 zoom buttonSW2 control vertical horizontal amplificationSW1 control 2 times or 4 timesNeed to take the VGA to use the screen output Key Technology Part of the technology, the output of the VGA, a horizontal vertical position for the word scan, and then the output of the map fileDrawing is divided into a total of 8 primary colors, color outputHowever, the focus of this case is to enlarge, control the size of the DELTA can control the size of the imageControl buttons for the SWITH on the board
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