Wait, why would the AC frequency affect the CPU clock? Did it use a multiplier instead of an internal clock? Update: it sounds[1] like other AC circuits might

Wait, why would the AC frequency affect the CPU clock? Did it use a multiplier instead of an internal clock? Update: it sounds[1] like other AC circuits might have been affected, perhaps the motors in the disk drive. [1] "On the hardware side, there were timing differences on the ITT 2020 motherboard, due to the 50 Hz frequency used with the 220 VAC power standards in the UK and Europe." https://apple2history.org/history/ah12/#01 https://apple2history.org/history/ah12/#01