Uncovering the Apple II's Mysterious (and Intentional) Clock Glitch

The Apple II's CPU clock has jitter or a glitch. This issue is not new—it has been present since its original design in 1977! Bald Engineer uses an oscilloscope to show how often the glitch occurs and how to correlate that jitter to its source—which is useful when you are not testing 40-year-old devices.

The device under test (DUT) in this video is the Mega IIe project. It's a fully compatible Apple IIe built around the Mega II chip.

Watch the Mega IIe video here: https://www.youtube.com/watch?v=gFCD4s_hsb4

Related Links: https://www.addohms.com/measuring-apple-iis-intentional-glitch/

#appleii #electronics #oscilloscope

Chapters 00:00 Stretch, Glitch, Jitter 00:28 Apple II Clocks 02:44 Analog Video Signals 04:26 Clock and Video Means Jitter 06:20 kthxbai

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Video produced by James Lewis (@baldengineer): https://baldengineer.com ... https://www.youtube.com/watch?v=ZWf8t_mHocM