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Is this weird USB boot signal thing the reason why Apple keyboards used to ship with nonstandard USB connectors that would fit their nonstandard USB extension c

• mrpippy 2y ago
  I think that was because the max cable length in the USB 1.0 spec is 3 meters. The fairly short captive keyboard cable plus extension was in spec, but using the extension with anything else likely wouldn’t be. Hence, the weird connector to prevent you from using it to extend something else (particularly something with higher current draw)
  • dfox 2y ago
    Technically an extension cable with USB-A jack is forbidden by the USB spec anyway.
• kalleboo 2y ago
  There is no such thing as a standard extension cord - USB A extension cords are forbidden by the USB standard. That's why it's "not USB", because making it USB would ironically make it not allowed to be branded as USB.