Troubleshootings with SFC, Neo Geo and PC Engine

[arovane]

Got my OSSC back today, it was faulty and scart was not responding. Now it’s working well, beautiful piece of equipment! I’ve run some tests, and it is indeed faster than the framemeister, almost no lag at all. Which is good cause that’s the one reason I was interested in the OSSC in the first place 🙂 First thing I noticed: Line triple doesn’t seem to work with my Panasonic plasma screen. The screen is 4 years old. Now to some console set up tests:

Megadrive/MegaCD/32X: Perfect
Dreamcast with Toro: Perfect
Saturn: Perfect
NESRGB: Perfect
Master System: Perfect
PS1: Perfect
N64 RGB: Perfect
Super Famicom: Bad syncing, picture can’t stabilize
Neo-Geo: No picture!
Pc Engine RGB: No picture!

So far, I can’t seem to make the Neo Geo and Pc Engine to work at all. SFC shows some picture but only half of it. On each case, the menu of the OSSC shows sync that appears normal and greenlight. I get sound but no picture. I use only very good cables so that is not the problem. Those consoles were working with the Framemeister. Help?

[BuckoA51]

SNES plus OSSC may just be incompatible with your TV, PC Engine and Neo Geo should work though. What model PC Engine and Neo Geo exactly?

[arovane]

-Managed to make PC Engine work with LPF to 10MHz. It’s a japanese white model coupled to a CDROM modified to output RGB.

-The Neo-Geo has no picture at all but shows perfect sync on OSSC screen and green light and sound. It is a Japanese model, serial about 73000, RGB output, cable from Retrogamingcable.

-Super Famicom shows picture but jittering and unable to stabilize.

[BuckoA51]

For Your Neo Geo try the following:-

H-PLL pre and post coast – 3
Hsync tolerance – 10us (or higher)

[arovane]

Nope, still nothing… But working fine with Framemeister. I don’t understand, could it be that Neo Geo delivers different picture size than other consoles?

[BuckoA51]

When you connect the Neo Geo, there should be two numbers displayed on OSSC’s LCD.. Something kHz and something else Hz, what are these values? Can you also press the info button and tell us what numbers are displayed.

[arovane]

Ok, think it was something like 262p, 59-60kHZ and 14-15Hz. But doublechecking this afternoon.

[arovane]

Ok it shows 264p, 59.59hz, 15.73khz
Info button doesn’t work.

[Harrumph]

I believe Marqs has stated that certain TVs are very reluctant to accept signals outside of the 525 standard, perhaps with only +\-1 lines of tolerance. This becomes an issue with NeoGeo as 264×2 = 528. Then in addition you have the lower than usual framrate, again TV tolerance for this will vary. You might simply be unlucky with your particular Panasonic model.

[marqs]

Yes, if OSSC displays those numbers and does not have red led alight, then it has synced ok and the issue is TV’s incompatibility.

[arovane]

Ok so SFC and Neo-Geo are not compatible with my TV. Is there a way around this, that does not include buying a new TV? Those 2 consoles worked well with xrgb mini, that’s what I don’t understand.

[marqs]

Framemeister converts many off-spec refresh rates to 59.94Hz regardless of its vlock setting – in general its output is not so directly coupled to input, enabling more standardized digital output.

[BuckoA51]

Info button doesn’t work.

Which remote are you using?

[arovane]

The one that came with it. All the buttons works but when I press info nothing happens.

[BuckoA51]

Nothing happens? Does the OSSC green light blink to show it has received an IR signal?

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