question about scart to vga on genesis

Discussion in 'Other Consoles & Oldies' started by sprong, Jan 18, 2017.

  1. sprong
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    sprong Member

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    so ive been searching around for solutions to improve the video quality of my genesis, i am aware of all the cheap and not so cheap options. the thing is almost every method requires a video upscaler that requires it own external power supply, which is rather annoying. i have my genesis modified to s-video which is better than composite and i thought that was going to be my best "no external power" option. however...... then i found these very cheap scart to vga adapters on ebay.

    (http://www.ebay.com/itm/Valueline-2...317375?hash=item23669b6cff:g:ckcAAOSw8RJXBhwh)

    then i got really curious and found a powerless vga to hdmi adapter, i wont bother posting the link for that one because now im probably getting laughed at by several of you, but they do exist. so anyway if i got a female to female scart adapter and linked the scart out of the genesis through the cable in the link i posted would that work!?! my guess is that the signal would be incompatible with the tv or something but i would like to know if anybody has thought of this or even tried it.
     
  2. spinal_cord

    spinal_cord Knows his stuff

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    Doesn't that require that your already outputting RGB? I have no idea about the genesis video signal, but I doubt it does that. Scart won't pass s-video to VGA i don't think.
     
  3. sprong
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    sprong Member

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    genesis does output rgb scart natively, i thought everybody knew that.
     
  4. spinal_cord

    spinal_cord Knows his stuff

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    I was never a sega fan, so it's not something I've ever thought about.

    You'd have to make sure that the other scart cable and adapter have all of the pins connected though.
    But still, can't say for sure, it's always worth a try though.
     
  5. Armadillo

    Armadillo GBAtemp Psycho!

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    It likely won't work.

    RGB over scart is 15Khz, over VGA it's typically 31Khz.
    VGA also has seperate sync signal (hsync and vsync), while RGB over scart typically takes the sync signal from composite.

    There are some tv/monitors that accept 15Khz vga, & apparently some that are also fine with csync tied to both hsync/vsync, but you would still a sync stripper to grab a clean sync from the composite line.
     
  6. ym2612

    ym2612 Member

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    RGB with csync (sync without composite video signal) gives best results with scalers/linedoublers for modern tv (and are even mandatory for some professional CRT like Sony PVM/BVM). RGB with composite sync (sync over composite video signal) gives on some modern tv so called "jailbars" and bad colors but should be ok on old/cheap consumer CRT/15khz monitor.

    the only "no external power" solution for mega drive with modern tv i can think of right now would be the Component-cable from HDRetrovision. but that cable is currently not available to buy and your tv has to accept 240p at the component input. most modern tv will be confused with a true 240p signal and wrongly display it in 480i.