Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: JEDI on November 28, 2002, 03:54:26 pm
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Wussup :)
I have built my own supergun.
I
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You may want to ask this on www.gamesx.com as there are more people with scart TVs on that msg board (and people that have built super guns). I don't understand the +5v to pin 16 (but everything else looks correct).
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I am also suffering from the same problem
using a street fighter 2 rainbow hack board
one tv just displays a white ghost image (sony trinton)
the other the picture is all garbled (hitachi 24")
if anyone knows the solution please shout I was under the impression this would work if i wired the scart connector up as on chads website
thanks for your time
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I have a similar problem too...I wired up my ArcadeVGA to Scart using the same connections - the image is not rolling, but just REALLY black, can barely make out what's going on.
A few photos (running Windows) are here:
http://mamewah.mameworld.net/TV1.JPG
http://mamewah.mameworld.net/TV2.JPG
http://mamewah.mameworld.net/TV3.JPG
(Paste into browser)
I guess I've wired something wrong but what!?
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Minwah, you probably need to buy the video amp on Ultimarc's site, your TV probably doesn't like the 1Volt Peak-to-peak output of the card.
Canardo, your TVs may not be compatable with the 60hz refresh rate that the boards output.
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hmm 99% certain my tv supports 60hz (it works fine for the ps2 xbox etc)
thinking maybe I need to invert the sync signal
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Minwah, you probably need to buy the video amp on Ultimarc's site, your TV probably doesn't like the 1Volt Peak-to-peak output of the card.
Canardo, your TVs may not be compatable with the 60hz refresh rate that the boards output.
Thanks for the suggestion, but from what I have read Scart is designed to accept 1V (so 5V would be too high). I'm not sure tho :(
I think I need to wite the 5v with 100ohm resistor to pin 16 (blanking) as JEDI suggests...dunno what it does tho! :D
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I've noticed this pin connected on many scarts and it is also looped to pin 8, pin 8 switches tv to AV channel when it recieves 5v, not sure if this the problem but don't rule it out.
You could crack open a known rgb scart plug from ps2 or dreamcast to double check what pins are connected (except composite and audio pins obviously).
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hmm 99% certain my tv supports 60hz (it works fine for the ps2 xbox etc)
If those are european ps2 and x-box, they output 50 Hz (at least they're supposed to anyway).
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import ps2 and xbox cant be bothered to wait for european versions hehe hence i almost certaint they working on 60hz
have a jap dreamcast almost certain thats working 60hz (it doesnt even have a modem)
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My Dreamcast & GameCube scart leads can output at 60Hz if selected...
Good idea Cave, I'll have a look in my DC scart lead :)
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Ok I have got mine working by ditching the scart socket I had and wiring it directly to a PSX RGB Scart cable( minus the audio pins) with the end cut off
the difference inside the connector is indeed pin 8 is conencted to the +5v blanking ground
also the grounds for each individual colour are not connected
and on the actual inputs there is a 100 micro farad capaicitor connected inline(to filter noise I presume)
also pin 18 is grounded
getting a slight problem with blue bleeding but other than that its a great pic and think this might be because my +5v is now going through 2 x 100hms worth of resistance.
Hope this helps you minwah
and thanks for the idea of opening a scart cable cave