Nintendo video invertor

[Sarver Systems]

I'm building another tester.

This one will need to include a way to test Nintendo boards (DK, DK Jr, Playchoice10, etc...) using a standard jamma harness and standard monitor connections (RGB).

Is there a standalone invertor that can take the video signal from the edge connector on these games and invert it to RGB out?

I don't need to test the monitors, just the game boards themselves.

[lilshawn]

i believe someone at one time mentioned randyfromm had a schematic on his website for a nintendo video inverter.

I have also heard some people have used 7404? 74LS04? inverters to do it as well?

[SailorSat]

The 7404 approach does work, but most reduces the color count to 16, which is "okay" for donkey kong, but may be a problem for other games.

[Sarver Systems]

I want to use it for testing boards, so I need it to show as clear of a picture as possible, just the same as the original monitor did.

[CraftyMech]

Mike's Arcade makes a Nintendo->Jamma adapter:

http://www.mikesarcade.com/cgi-bin/store.pl?sku=NIN2JAMMA

[Sarver Systems]

Craftymech: Perfect! Thanks!