composite sync and XOR gates

[syntax_X]

Ive been looking on for awhile now on a design for an XOR gate circuit to make composite sync.
The ones i find regulate the polarity of the sync so its always negative, but im using an arcadevga card so the sync pulses are always negative anyway.
If anybody knows a good design please help, otherwise ill have to throw out a perfectly good 50" rear projection:(

[grantspain]

i have seen a thread on either byoac or aussie arcade explaining exactly how to do this with an ic,go have a search on those forums

[dj_johnnyg]

I believe this may help.

http://www.tkk.fi/Misc/Electronics/circ ... 2rgbs.html

[syntax_X]

thanks guys:)

[syntax_X]

Im using an arcadevga card which outputs negative sync signals always, so i dont really need the extra stuff on the circut, but dont really know what to take out.