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NFG Forums => RGB + Video Discussions => Topic started by: PluueeR on March 31, 2014, 04:58:42 AM

Title: PAL Mega Drive 1 RGB sync issue
Post by: PluueeR on March 31, 2014, 04:58:42 AM
Whenever I connect my PAL Mega Drive 1 through RGB there are vertical jagged lines visible. Research online let me believe it has something to do with composite video being used for sync instead of csync. This is true in the cable I have. I connected this specific wire to the csync pin, but no luck. Seems to be missing a couple of components on this pin.

I found this solution: http://www.mmmonkey.co.uk/console/sega/md-sync.htm (http://www.mmmonkey.co.uk/console/sega/md-sync.htm)

However I don't really feel like modding my consoles for some reason. Can this issue be solved with a LM1881 sync cleaner?
Title: Re: PAL Mega Drive 1 RGB sync issue
Post by: unshe on March 31, 2014, 09:00:46 AM
i think this is the best we can do:
http://www.retrogaminghistory.com/showthread.php/12028-Mega-Drive-Master-System-CAVO-RGB-guida-definitiva (http://www.retrogaminghistory.com/showthread.php/12028-Mega-Drive-Master-System-CAVO-RGB-guida-definitiva)
Log-in, translate and read
Title: Re: PAL Mega Drive 1 RGB sync issue
Post by: PluueeR on March 31, 2014, 05:40:18 PM
Thanks!

If I understand correctly. A 220uF cap on csync (use pin 7 instead of 3) is al I need to do?
Title: Re: PAL Mega Drive 1 RGB sync issue
Post by: unshe on April 01, 2014, 07:12:44 AM
that one + a 220ohm resistor
Title: Re: PAL Mega Drive 1 RGB sync issue
Post by: PluueeR on April 02, 2014, 05:36:23 AM
This pic http://www.retrogaminghistory.com/attachment.php?attachmentid=28762&d=1373755105 (http://www.retrogaminghistory.com/attachment.php?attachmentid=28762&d=1373755105) only shows the 220uF cap. I decided to try that first, et voila! Finally a good picture with my MD. Thanks again unshe. Again you've been of great help!

My local store gave me a "huge" only which won't fit inside a scart plug. Maybe I'll go back tomorrow to ask for a smaller one!

I hope that these cables also work with the xrgb mini which I intend to buy.