punching paper tape

[Eric Moore]

The document refers to 8 bit (7+P+F) and 7 bit (6+P+F) using the same
width, 25.4mm, for ECMA-10.

>From the docs that have been linked, whirlwind tape was 7 bit, but not
EIA-RS-227 or ECMA-10 compliant, but easily re-created by trimming a data
bits width from normal 8 level tape. (LSB should be trimmed, not MSB, I
think)

I have a teletype BRPE which supported a 7 level tape format, but I do not
know if it was ECMA-10 or whirlwind style, but it may be buried in the docs
available online.

-Eric

On Fri, Mar 26, 2021, 8:10 PM Ron Pool via cctalk <cctalk at classiccmp.org>
wrote:

> On 3/26/21, 8:41 PM, "cctalk on behalf of Paul Koning via cctalk" <
> cctalk-bounces at classiccmp.org on behalf of cctalk at classiccmp.org> wrote:
> > I can't find right now the drawings that show all the 5..8 channel tape
> layouts and dimensions, but I did see a
> > number of references that speak of 7/8th inch tape for 7 channel
> layout.  (Also 11/16 for the 5-channel case)
>
> ECMA-10 defines some of the common punched tape layouts and includes
> dimensions and other requirements.
> I'm not sure if this is the document that Paul is referring to.
>
> https://www.polyomino.org.uk/computer/ECMA-10/
>
>
>
>