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HSTX - Some displays show pixel artifacts in Genesis emulation #7

@fhoedemakers

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@fhoedemakers

When using the Genesis emulator, some displays—especially television sets—show visible pixel artifacts, most noticeably when the screen background turns black. Other emulators don't have the issue.

I did not notice this issue initially because my primary setup routes the signal through a capture device, which likely compensates for or filters out these artifacts.

However, when connecting the device directly to certain displays, the issue becomes apparent. For example, the image is perfect on my HP E24i G4 monitor with no visible artifacts, while my Samsung QE55 4K TV does exhibit this issue when connected directly.

Notably, the artifacts disappear on the Samsung TV when a capture device is placed in between, suggesting the capture device alters or stabilizes the signal in a way that prevents the issue.

Additionally, the artifacts are minimal to none on Fruit Jam or PCB-based projects, but can be severe on breadboard setups. This suggests the issue may be related to signal integrity or interference when using high clockspeeds.

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