IBM 029 Card Punch and ASCII Machines

Paul Koning paulkoning at
Sun May 10 13:38:25 CDT 2015

> On May 10, 2015, at 2:36 PM, William Donzelli <wdonzelli at> wrote:
>> Correct.  And a number of DEC operating systems had card reader support.  I haven’t seen them very often on DEC machines, but for example RSTS can handle at least 026 and 029 card codes, and some vague memory says there may have been a “1401” table as well.
> This should come as no surprise.
> We often think that DEC machines were all doing cool things like
> running railroads or controlling high energy physics experiments, but
> a large number of PDP-11s spent their lives running plain old business
> software.

Indeed, but I think that even in that application card readers were not all that common.  The batch card model was more an IBM thing, with DEC systems tending more to terminal input.


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