Okay, I wrote jrok, but I haven't gotten a reply yet, and I'm impatient. I may not get a reply, because I'm using his converter out of spec.
I built a little box. One end has holes for the onboard connectors on the JROK...S-Vid and Composite. The other side is a female Neo-Geo 8-pin DIN socket. I also built a 2 foot patch cord to go between the Neo-Geo AES and the converter, from two male 8-pin DINs and a length of 8-conductor wire I stole from a Saturn RGB cable (snip snip). All DINs are 270 degrees.
Incidentally, someone needs to tell Lawrence to note the difference between 262 and 270, Mega Drive and Neo-Geo, on GameSX, I think. I ruined a 270 plug and gouged my Genesis due to this lack of critical, need-to-know information. -_-
Anyways, everything is wired correctly to the best of my knowledge. The patch cable is just straight through, which is a no-brainer. The socket goes right into the molex connectors that go on the JROK board. I connected the black wire on the 2-pin voltage connector to the shield, and the black wire on the 5-pin video connector to the video ground pin on the Neo-Geo layout.
First time I plugged it in to my friend's AES console, I got a flawless picture, for about 3 seconds. Then it started flipping in various ways, like it couldn't get vertical or horizontal hold, PLUS the colors are completed screwed.
Being the bad person I am, I started fiddling with the plug, making momentary contact with certain pins only. Of course, +5v has to connect, to power the board. But after that happens, if I only connect some of the colors and not sync, sometimes I get that brief picture 'o' perfection again. But it only lasts for a few seconds, every time it happens.
So...any help would be good help. I don't have a supergun to test this on yet (it's still in the works), so I'm not sure what the culprit is. I'm no electrical engineer, so I'm not sure whether it's the thin 24AWG wire from the Saturn RGB cable (but it worked fine on Saturn), a weak +5v signal from the Neo (maybe it doesn't run as strong as an arcade PSU), or just a JROK converter I blew due to using it for the wrong thing.
But it should work just fine by the signals, right? I mean, Neo-Geo is RGB+Negative Sync, like any ol' arcade board. The only thing I've heard is that the Neo AES has weak sync, and that might have something to do with it.
Oh well. If anyone who actually KNOWS electronics, and isn't a hack like me, wants to help, please do. I would have given up on this if I didn't see that 3 seconds of incredible S-Video glory. Now I'm hooked, and I crave a working adapter. And between this and my PC motherboard which just died (right before the release of Jedi Academy, no less), I'm at my wits end. I wish SOMETHING would just work.
- Ven
I built a little box. One end has holes for the onboard connectors on the JROK...S-Vid and Composite. The other side is a female Neo-Geo 8-pin DIN socket. I also built a 2 foot patch cord to go between the Neo-Geo AES and the converter, from two male 8-pin DINs and a length of 8-conductor wire I stole from a Saturn RGB cable (snip snip). All DINs are 270 degrees.
Incidentally, someone needs to tell Lawrence to note the difference between 262 and 270, Mega Drive and Neo-Geo, on GameSX, I think. I ruined a 270 plug and gouged my Genesis due to this lack of critical, need-to-know information. -_-
Anyways, everything is wired correctly to the best of my knowledge. The patch cable is just straight through, which is a no-brainer. The socket goes right into the molex connectors that go on the JROK board. I connected the black wire on the 2-pin voltage connector to the shield, and the black wire on the 5-pin video connector to the video ground pin on the Neo-Geo layout.
First time I plugged it in to my friend's AES console, I got a flawless picture, for about 3 seconds. Then it started flipping in various ways, like it couldn't get vertical or horizontal hold, PLUS the colors are completed screwed.
Being the bad person I am, I started fiddling with the plug, making momentary contact with certain pins only. Of course, +5v has to connect, to power the board. But after that happens, if I only connect some of the colors and not sync, sometimes I get that brief picture 'o' perfection again. But it only lasts for a few seconds, every time it happens.
So...any help would be good help. I don't have a supergun to test this on yet (it's still in the works), so I'm not sure what the culprit is. I'm no electrical engineer, so I'm not sure whether it's the thin 24AWG wire from the Saturn RGB cable (but it worked fine on Saturn), a weak +5v signal from the Neo (maybe it doesn't run as strong as an arcade PSU), or just a JROK converter I blew due to using it for the wrong thing.
But it should work just fine by the signals, right? I mean, Neo-Geo is RGB+Negative Sync, like any ol' arcade board. The only thing I've heard is that the Neo AES has weak sync, and that might have something to do with it.
Oh well. If anyone who actually KNOWS electronics, and isn't a hack like me, wants to help, please do. I would have given up on this if I didn't see that 3 seconds of incredible S-Video glory. Now I'm hooked, and I crave a working adapter. And between this and my PC motherboard which just died (right before the release of Jedi Academy, no less), I'm at my wits end. I wish SOMETHING would just work.
- Ven