Reply To: Atari ST SYNC loss on demos

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March 20, 2022 at 11:43 AM #52537
BuckoA51
Keymaster

    Could be the ST demos are using some trickery that your display doesn’t like when line doubled or processed. Sync losses are to be expected on scenes where demos switch to other screen modes, for instance.

    I would try increasing H-PLL Pre-Coast H-PLL Post-Coast coast to 4 or 5 see if that makes a difference.