Menu

Some OSSC questions

Home Forums OSSC OSSC – Discussion and support Some OSSC questions

This topic contains 9 replies, has 5 voices, and was last updated by  Cep 10 months, 1 week ago.

Viewing 10 posts - 1 through 10 (of 10 total)
  • Author
    Posts
  • #7944

    dead_screem
    Participant

    Can anyone with an OSSC confirm whether or not MD games have visable side color borders like its supposed to? i.e does it look like it does on the XRGB-3 and the Framemeister?
    And does it lose sync to the MD when you enter a special stage in Sonic 2? (like the XRGB-3 in line double mode)

    Another annoying problem I have with the XRGB-3 in line double mode is with Sonic CD. just before the title loads and also anytime the screen fades to black while loading, the signal cuts out and causes my monitor to go into power save mode temporarily. Anyone know if this happens with the OSSC?

    And some general questions, is the line doubled output 640×480 or 720×480?

    Why is the SNES such a problem? I hear its dependant on TV/Monitor support, why? is it the consoles framerate? Because shouldn’t the video output of the OSSC’s line doubler be the same regardless of console?

    And about RGB21->SCART conversion. Most RGB21 cables made for NTSC consoles have 220uf DC blocking capacitors on the RGB lines. While most made for PAL console SCART cables have 75ohm impedence matching resistors on the RGB lines.
    Will using my RGB21 cables with a RGB21->SCART converter have any color level issues because of the differences in made for NTSC vs made for PAL cables?

    • This topic was modified 10 months, 1 week ago by  dead_screem.
    #7955

    BuckoA51
    Keymaster

    Some of these I will need to wait for Marqs to answer but:-

    MD games have boarders on my TV. 240p grid pattern test shows it’s displaying correctly.
    MD 480i games are compatible if you adjust the pre/post coast values as per the Wiki instructions
    Output is 720×480

    #7956

    paulb_nl
    Participant

    You won’t have a problem with a JP21 to SCART converter. You need capacitors or resistors in the cable depending on the console not on the plug. For example a NTSC snes must have capacitors and a PAL snes must have resistors whether you use a JP21 or SCART plug.

    #7959

    marqs
    Participant

    “Why is the SNES such a problem? I hear its dependant on TV/Monitor support, why? is it the consoles framerate? Because shouldn’t the video output of the OSSC’s line doubler be the same regardless of console?”
    -The output is totally dependent on the console. If one scanline is slightly longer/shorter as is with SNES, that is reflected on the output and not all displays like that.

    • This reply was modified 10 months, 1 week ago by  marqs.
    #7967

    dead_screem
    Participant

    MD games have boarders on my TV. 240p grid pattern test shows it’s displaying correctly.
    MD 480i games are compatible if you adjust the pre/post coast values as per the Wiki instructions
    Output is 720×480″

    just to clarify, it has side borders?
    also can you (or someone else) test entering a special stage in sonic 2? the bright flash of white causes the XRGB-3 to lose sync to the console. I would like to know if it happens with the ossc or not.

    -The output is totally dependent on the console. If one scanline is slightly longer/shorter as is with SNES, that is reflected on the output and not all displays like that.

    Any idea why the snes doesn’t have a problem with the XRGB-2 plus or XRGB-3 (b1 mode) analog line doublers?

    Also, regarding 720p tv incompatibility… what is the problem? is it outputting pillar boxed 1280×720 or is it trying to send 960×720???

    • This reply was modified 10 months, 1 week ago by  dead_screem.
    • This reply was modified 10 months, 1 week ago by  dead_screem.
    #7984

    BuckoA51
    Keymaster

    just to clarify, it has side borders?

    I’m not sure what you’re getting at, maybe I can test a specific game for you?

    also can you (or someone else) test entering a special stage in sonic 2? the bright flash of white causes the XRGB-3 to lose sync to the console. I would like to know if it happens with the ossc or not.

    I’ve not tested that bright flash specifically but you can cure that problem on the XRGB3 by using a clean sync (CSYNC) cable. The OSSC is not affected by that issue at all.

    As for SNES issues and XRGB, XRGB2/3 are a lot less compatible full stop with modern TVs.

    #7991

    dead_screem
    Participant

    I’m not sure what you’re getting at, maybe I can test a specific game for you?

    Not just color borders on the top and bottom, but on the left and right sides as well.
    Some people seriously hate them, and use custom settings on the framemeister to get rid of them.
    But my old CRT TV had almost 0 overscan and always had side borders. So I like them. I just want to make sure OSSC has them by default. Here is a youtube video that shows the side borders.

    I’ve not tested that bright flash specifically but you can cure that problem on the XRGB3 by using a clean sync (CSYNC) cable. The OSSC is not affected by that issue at all.

    Hmm… supposedly my cable uses CSYNC… oh well.

    #7993

    BuckoA51
    Keymaster

    Yes of course those borders are preserved.

    With the XRGB3 I definitely had screen blanking issues on the MD when the screen went bright, until I switched to a CSYNC cable.

    #7996

    dead_screem
    Participant

    With the XRGB3 I definitely had screen blanking issues on the MD when the screen went bright, until I switched to a CSYNC cable.

    my cable is from retro_console_accessories on ebay. IIRC it had an in-built sync cleaner/booster. I think that’s the problem…

    Also, thanks for the answers! looks like I’m going to need to save money now. 😛

    #8046

    Cep
    Participant

    Hi everyone, just new on the forum after acquiring that OSSC stuff,

    To answer to dead_scream, I took a photo on my 16:10 Dell 2407WFP (1920×1200)
    I launched Sonic 2 with PAL 50Hz MegaDrive I, the OSSC is in LineX3 mode with 16:9 format and we can clearly see that it have borders on each side (left, right, up and down)
    I don’t remember any sync lose when entering a special stage zone but I didn’t check right now

    The OSSC displays RGBS 313p – 15.55kHz – 49.69 Hz

    I can’t test with Sonic CD as I don’t have the game…
    On my side with my PAL SNES I lose sync when scrolling (as it as described in an other post on the forum)

    http://www.hostingpics.net/viewer.php?id=280054IMG20160720214945126.jpg

    • This reply was modified 10 months, 1 week ago by  Cep. Reason: link was bad
Viewing 10 posts - 1 through 10 (of 10 total)

You must be logged in to reply to this topic.