[BuckoA51]

So if I’m reading this correctly you bought your JP21 cable from Ali Express? Where did you get the JP21 adapter from? VGP?

Sounds like its just a SCART cable not a JP21 cable.

[BuckoA51]

Definitely not a known issue, not one I’ve run into at all. We may have to RMA this unit and swap it for another one for you.

[BuckoA51]

Not a problem! I’ll get things sorted for you now.

Thanks,

Matt

[BuckoA51]

Hi,

I did contact you on your live.com e-mail address yesterday, did you not get it?

[BuckoA51]

We’ll have stock of Extra AV out within the next few days.

[BuckoA51]

since 85 isn’t a multiple of 50 or 60 I don’t think this would be all that much use as you’d get a stuttering image.

[BuckoA51]

Can’t understand why it’s not working with your Pro when it did for Rees, very strange.

Should composite video be peaking that high? I guess Atari weren’t as careful as they should have been.

[BuckoA51]

Rees did some beta testing on the OSSC Pro and his STe works with it – https://www.youtube.com/watch?v=4RJsdvM4fI4&t=877s

If you are willing can you remove the resistor from the composite video and see if that works?

[BuckoA51]

and is your system a ST with a RF modulator (composite video for sync) or without (composite sync) ?

[BuckoA51]

Ah yes seems you’re right, pin 2 can be sync or composite video.. how lovely. Do you recall Markus if your machine had RF or not? I’m just trying to narrow down the problem here.

@retro-computer-shack any joy with adjusting Analog sync Vth?

[BuckoA51]

ST actually only outputs hsync and vsync (or at least most models do), if you see TheCorfiot post above it seems some cables use a hacky way to get sync from hsync while others use composite video.

You’d have thought composite video was the better way to do it, but perhaps not. I was told composite video out has long a delay time on the sync causing the image to be shifted, but this could easily be corrected on either OSSC by adjusting backporch. I agree using a resistor on composite video seems strange but I’m no expert.

[BuckoA51]

The mystery deepens as I’ve just had a customer contact me by e-mail and his Atari ST (using SCART with composite video for sync) will not sync with OSSC Classic on 1.x firmware or OSSC Pro either.

Marqs can you open your SCART cable and determine how sync is generated? Composite video or some hack to combine H/V syncs together?

• This reply was modified 3 weeks, 1 day ago by BuckoA51.

[BuckoA51]

To say composite is the best for PS1 is a bit of a stretch. What you get with composite is noise and lack of sharpness, for some games this can actually be beneficial because sharpening up early 3D games really emphasises how low resolution and jaggy they were.

What you might want to do is play with Scaler opt->Scaling algorithm to see if any of those produce an image that’s more pleasing to you.

[BuckoA51]

Are you able to test with another TV as well see if the problem persists?

[BuckoA51]

What kind of cable are you using to connect your Archimedes to your OSSC?

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