gscartsw: automatic 8:1 SCART-RGB switch

Discussion in 'The ASSEMblergames Marketplace' started by superg, Jul 6, 2014.

  1. Informationator

    Informationator Member

    Joined:
    Jun 29, 2016
    Messages:
    9
    Likes Received:
    0
  2. retrorgb

    retrorgb Spirited Member

    Joined:
    Jul 20, 2013
    Messages:
    134
    Likes Received:
    27
    Yes, that should be correct. SCART cables are directional and since that one says "from" a SCART device (in this case, a Toro) "to" the XRGB Mini, it'll work fine.
     
  3. Informationator

    Informationator Member

    Joined:
    Jun 29, 2016
    Messages:
    9
    Likes Received:
    0
    Thanks, RetroRGB. I ordered the coaxial version so it'll be super shielded. Excited! :)
     
  4. Informationator

    Informationator Member

    Joined:
    Jun 29, 2016
    Messages:
    9
    Likes Received:
    0
    Hey guys, I've been doing boatloads of research in an effort not to bother anyone, but there's one thing I'm not totally sure about: The sync stripper function.

    My understanding is that a sync stripper is used to separate the composite sync (H + V) from other signals. So, if you're using luma sync, it separates the composite sync from the luminance data. Or, if you're using sync-from-composite-video, it separates the composite sync (H+V) from the composite video data (Chrominance/Luminance).

    What I'm not totally sure about is if things will function correctly with this switch always turned to on. Will I need to turn it off for CSYNC-enabled systems like SNES/Genesis and on for a luma-sync system like N64? (i.e. will the sync stripper being on somehow interfere with CSYNC data?) CSYNC has its own pins so I figure it'd be fine, but I'm just curious and am always learning about this stuff. Thanks! :)
     
  5. Xenoghost42

    Xenoghost42 Newly Registered

    Joined:
    Oct 1, 2015
    Messages:
    2
    Likes Received:
    0
    If you are using an XRGB Frameister mini Simply Put..leave the CSYNC switch on. all your consoles that already output CSYNC (Composite Sync) will be fine with the CSYNC switch turned on but i personally would turn it off when using these because there's no point in the EL1883 processing an already CSYNC signal. Sync Is not separated into H + V unless you turn on the HSYNC switch. default output by the switch is the input you are feeding it which is typically RGBS. The reason for using HSYNC switch is to make the output signal True VGA which could be understood by a tv or PC monitor. Good Luck finding a TV or PC monitor in this day and age that recognize a 240p RGBHV signal however. Best use of the HSYNC feature is for a dsub to BNC out cable to hook your scarts directly up to a PVM or something. Luma, Sync on Composite all get converted to CSYNC with switch on. It's the cleanest form of sync for rgb anyways so its recommended you use it.

    simple explanation:
    if console is CSYNC = Turn off CSYNC Switch
    if console is Luma Sync = Turn On CSYNC Switch
    if console is sync on composite = Turn On CSYNC Switch
     
  6. Adeema

    Adeema Member

    Joined:
    May 9, 2016
    Messages:
    7
    Likes Received:
    0
    But no ill effect if CSYNC switch is left on for a CSYNC console, right?
     
  7. badsector

    badsector Member

    Joined:
    Jul 9, 2015
    Messages:
    15
    Likes Received:
    2
    I turned off the sync cleaner switch on the gscartsw because I already got one in my adapter to the Framemeister. I mostly got consoles outputting csync, but my Genesis 2 outputs sync on composite and my PS1 uses sync on luma. Long story short: I have a sync cleaner that is always on and I got no problems with my csync consoles.
     
  8. Xenoghost42

    Xenoghost42 Newly Registered

    Joined:
    Oct 1, 2015
    Messages:
    2
    Likes Received:
    0
    That is correct sir...
     
  9. Informationator

    Informationator Member

    Joined:
    Jun 29, 2016
    Messages:
    9
    Likes Received:
    0
    Thanks, Xenoghost. I guess my only outstanding question/concern is what sort of input lag, if any, leaving the syncstripper on would cause. It seems odd that it would process a CSYNC signal if it's already CSYNC, but I'm obviously ignorant about how the circuit/stripper works.

    Reason I asked is.... I'm all about ease-of-use where I can get it. If I can just leave the switch on and there are no ill-effects, then that means that's one less thing I have to touch when I boot up my games (vs. the pelican device where I always have to select the input I want). I love that this thing is auto=switching. Going RGB certainly isn't simplifying anything, but once I've worked out all of the kinks, it'll be one less thing I have to do. Good design is nerd heroin!
     
    Last edited: Jul 7, 2016 at 9:42 AM

Share This Page