this post was submitted on 15 Apr 2025
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retrocomputing

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Dont copy (discuss.tchncs.de)
submitted 2 weeks ago by mischk@discuss.tchncs.de to c/retrocomputing@lemmy.sdf.org
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[โ€“] mdhughes@lemmy.sdf.org 9 points 2 weeks ago (1 children)

Other way around. You punched the edge to make it writeable (or double-punched to write on the back side, if you were brave). Cover it to make it read-only. The 3.5" sliders were the same mechanism, open was write, closed was read-only.

[โ€“] lemmyseizethemeans@lemmygrad.ml 4 points 2 weeks ago

Oh the double punch. That's a deep cut there