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A hole at any of those points could represent either a one or zero That's not quite correct. There were twelve rows: 0-9, 11 and 12. A hole in row 0 was a zero
by GnarfGnarf 3y ago
A hole at any of those points could represent either a one or zero
That's not quite correct. There were twelve rows: 0-9, 11 and 12. A hole in row 0 was a zero, etc. Holes in 12 + 1 was an 'A', 11 + 1 was 'J', and 0 + 2 was 'S'. Other combinations were for punctuation.
- zokier 3y agoThat is just EBCDIC character encoding scheme. Its still ones and zeroes in the end. You can see this in this example card on Wikipeidas article on EBCDIC https://en.wikipedia.org/wiki/EBCDIC#/media/File:Blue-punch-card-front-horiz_top-char-contrast-stretched.png https://en.wikipedia.org/wiki/EBCDIC#/media/File:Blue-punch-...
- PaulHoule 3y agoWhere I work we have some old card decks that are in “column binary” format that occasionally we have to convert to some more modern format. http://ropercenter.cornell.edu/data-archaeology-uncovering-past-through-column-binary-conversion http://ropercenter.cornell.edu/data-archaeology-uncovering-p... https://documentation.sas.com/doc/en/lrcon/9.4/p0wq84yjj4qktyn17w4ih503hrc6.htm https://documentation.sas.com/doc/en/lrcon/9.4/p0wq84yjj4qkt...