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Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

VGA666+PVM composite sync (csync)

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retropievgavga666crt
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  • W
    wwweh
    last edited by wwweh 28 Jul 2021, 14:42

    Hi, I recently bought a VGA666 hat with the intention of hooking it up to my sony PVM.

    I changed the config to include

    dtoverlay=vga666
    dpi_output_format=0x105
    

    Which I read would enable csync on GPIO1/PIN28. But it only syncs for a fraction of a second then loses the vertical sync.

    alt text

    I've tried other pins and they don't work. If I remove the dpi_output_format it doesn't sync at all.

    Anyone have any ideas?

    W 1 Reply Last reply 28 Jul 2021, 15:42 Reply Quote 0
    • W
      wwweh @wwweh
      last edited by 28 Jul 2021, 15:42

      To anyone having the same issue, I needed to cut the HSYNC trace on the vga666 board for the csync to be strong enough to control the PVM

      1 Reply Last reply Reply Quote 0
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