Arcade MegaWing: Diodes and capacitors on VGA


Luís Marques

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Hello,

In the Arcade MegaWing schematic each VGA color component has two diodes and one capacitor. Could anyone clarify the following?
 
1) what are the values of these diodes and capacitors? the schematic doesn't say, it has only a "BAV199" marking
 
2) In the image <http://papilio.cc/images/Arcade_MegaWing1.jpg> I see empty soldering pads near the VGA connector, so I guess the diodes and capacitors were not actually installed on production boards, were they? I guess they are not essential, since the LogicStart MegaWing doesn't have them.
 
3) Essential or not, what is the purpose of that part of the circuit?
 
Thanks a lot!
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