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Old 12 April 2017, 14:12   #3
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Join Date: Aug 2004
Posts: 2,481
Hmm... I tried using the -nod3d9shader option, which means WinUAE doesn't use its built-in winuae.fx shader. No change.

Then I set Integer scaling, and made the window large enough so the image was scaled 2. The problem went away then.

Edit to add: Maybe there's an incorrectly-rounded floating point to integer conversion in the no scaling (with 2x H&V size) code path, but not in the integer scaling one?

Last edited by mark_k; 12 April 2017 at 18:29.
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