If the image appears offset to the right or left, or up or down, try adjusting the front and back porch values for the corresponding direction (or use the image position adjustments on the monitor, which accomplish the same thing). On a CRT monitor, the lengths of the front and back porches control the position of the image on the display. The values given in the table above are not particularly critical.
#DISPLAY FRONT PORCH SYNC SWITCHRESX MANUALS#
Every manufacturer seems to list different timings in the manuals for their monitors. TABLE 1 VGA CORE VIDEO MODEĪs with RS-232, the standard for VGA video is that there are lots of standards.
The following table lists timing values for several popular resolutions.
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