Sega Genesis RGB out to arcade monitor

[Frosty]

Here's a quick write-up on the progress of connecting a Sega Genesis to a standard resolution (CGA) arcade monitor...

To start, the Genesis A/V out on both a Model 1 and Model 2 will output pure RGB with a composite sync.  I also discovered that a Playstation 2 Breakaway Extension cable ($5 @ Radio Shack) uses the same 9 pin mini DIN connector as the Model 2 Genesis.  Luckily, the Beston arcade monitor I'm using shows a great picture with only the composite sync from the Genesis connected to the horizontal sync in.

However, one issue I've found is the color purity.  I'm almost 100% positive I've got the outputs matched, as I tested the RGB wires individually before connecting.  But, the picture below shows the image after all connections have been made.

I'm not sure why this is happening--any ideas?  Do I need to tone down the signals from the Genesis with some resistors?

[Frosty]

Here's a closer shot of the screen output, and how it 'should' look (second shot pulled while running Kega).

[DaveJ-UK]

Red and Green seem to be swapped... but if you're sure you have it wired up correctly...

[Frosty]

Yeah...everything is wired correctly.  I tested the connections individually before wiring up all three---and that's the result.  Gonna check and re-check...

[StephenH]

Maybe this pinout can help determine if you have a wiring fault:

http://www.gamesx.com/avpinouts/genesisav.htm

[dabone]

Even if you say you have it done correctly, swap red and green lines.

The genesis diagram might be mistaken.

Also, some of the older consoles needed 220uf caps in the rgb lines. (i.e. playstation 1 )

But I'd try just swapping the lines first. Should only take you a min.


Later,
dabone

[Frosty]

Update...and success.

Found the issue--one stray wire was causing a little color cross-over.  And, no resistors or 220uf caps necessary--great picture on startup.  I'll post a few more pictures of the finished cable...