punching paper tape

Eric Moore mooreericnyc at gmail.com
Fri Mar 26 14:40:17 CDT 2021

I can punch arbitrary 8 bit data to 8 level tape. Is the MSB always 0? That
is very easy to do, just make sure the binary looks right and as long as
the pitch between bits is the same as 8 level tape you will end up with
holes in the places you would expect.

If you want 7 level tape punched with some custom width between bits, I.E.
not compliant with EIA RS-227, I can not help you :)


On Fri, Mar 26, 2021, 2:31 PM Guy Fedorkow <fedorkow at mit.edu> wrote:

> wow, what format?
>   The codes I'm punching should line up with a long-dead machine,
> Whirlwind from MIT, so I think you'd consider them to be 7-track binary,
> i.e., same size as an 8-track teletype tape with one track blank, but no
> recognizable coding like ASCII.
>   Can you suggest what format you'd want?
>   Thanks!
> /guy
> ps,  You can see some of the work behind this at
> https://www.historia-mollimercium.com/whirlwind/
> On 3/26/2021 3:16 PM, Eric Moore wrote:
> I can easily punch and verify some tapes for you.
> -Eric
> On Fri, Mar 26, 2021 at 2:15 PM Guy Fedorkow via cctalk <
> cctalk at classiccmp.org> wrote:
>> Is there someone in North America that might be willing and able to help
>> out a small historical display project by punching a few short paper
>> tapes?
>> I'm glad to try to accommodate whatever coding requirements are easiest.
>> Thanks!
>> /guy fedorkow
>> fedorkow at mit.edu

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