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Sync issues with Nanao MS9

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retrorepair:
So it turns out it's my chassis. I tried it on my other cab and it came up fine so I guess I have to send it off for repair  :badmood:

For kicks I tried soft15khz and same thing, vertical sync just goes nuts.

I upgraded from a GeForce 7600 GT and that didn't do this with soft15khz, so what's the difference between the cards in terms of sync? I just tie the sync lines together, might the ATI card not like that?

If it makes a difference, with no drivers I can see windows just fine (albeit in two halves). So I'm wondering if there's something I can change in the VMMaker ini to get round it?

Calamity:
Check if you're chassis has some sort of sync polarity switch (many have). I don't think your monitor needs repairing, it's a sync polarity issue. I'll need to add some options to vmmaker for that, I'm still figuring that out.

retrorepair:
Well MS9s don't have a switch or jumper, they just use regular negative comp sync. It's not constantly rolling either, it's randomly "jittering" with little bits of tearing. Thing that rings alarm bells though is is gets better/worse when I move the horizontal shift pot. I suppose maybe the timing on this card is a bit different to the geforce?

Calamity:
Interesting. You could play with Arcade_OSD horizontal geometry settings, try to increase/reduce the sync pulse width or even front/back porches, just to see if you find a point where it gets stable, then you could write down those timings (on the right) in order to build your own custom monitor_specs line.

retrorepair:
Yeah I will do. I did go through to see if any built in resolution worked but no dice, so we'll see if I can find something it likes :)

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