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Primary Surface mode & DIB Draw
It is sometimes useful to use a mode of operation of your VGA card known as
Primary Surface mode or DIB Draw. This can be helpful in eliminating
VGA compatibility problems, or improving picture quality on some VGA boards
when used in some resolutions.
To use Primary Surface mode, run the program "PRIMARY", which is installed
with the WinTV application. Click Start/ Programs/WinTV and then, Click
on Primary. Click on Force Primary or DIB Draw then close the program by
clicking on the X. The Primary program simply makes a setting in the Windows
Registry that tells the application to use the Primary mode or DIB Draw mode of
operation.
This can be changed at any time to "Allow Overlay" by re-running Primary and
clicking Allow Overlay or DIB Draw.
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WinTV-USB Installation and Reference Manual