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The blocks with those would be scribbled over and invalidated. Do you know why ASCII 0x7f is DEL? Paper tape is write-once. To indicate a deleted character, it
by bitwize 4y ago
The blocks with those would be scribbled over and invalidated.
Do you know why ASCII 0x7f is DEL? Paper tape is write-once. To indicate a deleted character, it was conventional to punch holes in all bit positions -- 0x7f on a 7-bit punch.
- kragen 4y agoexcellent point