If you’re working with a CGA, EGA, or RGB gaming system this inexpensive board does a great job of converting the signal to VGA so that you can play using a modern display. But what if you have a SCART connector as an output? That’s the situation in which [EverestX] found himself so he hacked in SCART support.
The first step is to source a female SCART connector. He grabbed a coupler off of eBay and cracked it open, yielding two connectors. Now comes the wiring and you may have already noticed that there’s a lot more going on here than the color channels, sync signal, and ground. Technically that’s all you really need to make this happen, but the results will not be good. First off, the sync signal for SCART tends to be rather awful. That’s where the blue breakout board comes into play. [EverestX] used an LM1881 to grab the composite sync (yes, composite sync, not component sync) signal as a feed for the VGA converter. He also added in an audio jack for the sound that is coming through the connector.
We’re sure there’s still a lot of folks using their original Xbox either for gaming or as an XBMC device. If you ever owned one yourself you’ll remember that you can’t turn it on with a remote control. If you have to get up and push a button on the front of the black box, as least this hack will take care of tuning the television to the correct channel. That is, if you are using a SCART adapter to connect it to your TV.
[Karl-Henrik] figured out that mapping a voltage to pin 8 of a SCART port tells a TV that the port is active, and allows it to select the proper aspect ratio. Check out the Wikipedia SCART page to see that pushing 5-8V is the signal for a 16:9 aspect ratio, and 9.5-12V translates to 4:3. So he added an audio jack to the back of his Xbox and a matching one on the plastic case of the adapter. Now just tap into the wires on the power connector for the hard drive inside, connecting them to the newly installed jack. There’s a 12V and a 5V line, just choose the one based on the aspect ratio you prefer. He uses a jumper wire with the appropriate plugs on each end to make the connection. Now the TV will automatically tune to the correct AV input when the Xbox powers up.
[133MHz] cracked open a cheap tube television to add a SCART connector. He knew he had a chance at success when he discovered all of the knock-outs on the back of the connector panel because one of them was exactly the right size for the connector. But it wasn’t quite as easy as soldering in one component. He ended up injecting his own RGB data from the SCART connector directly into the onscreen display, making an end run around the missing feature. [133MHz] removed some resistors in the circuit and used the empty lead holes to patch in his own circuit, feeding the RGB data from the SCART connector to the OSD chip in the format it needed.
This one takes you way down the rabbit hole. We’re glad he provided so much background about the hack but it’s going to take us a little while to fully wrap our heads around how he figured it out.