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A comment on Altair 8800 – Loading 4K BASIC with a Teletype [video]. Parent comment

Re:Altair 8800 – Loading 4K BASIC with a Teletype [video] by gue5t on Monday May 26, 2014 @11:25PM (#7802707)
All punches are idempotent, in that punch_x(original) = punch_x(punch_x(original)). ASCII DEL is the only punch that acts as a constant endomorphism.
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