IBM Logic IC equivalency information needed

Fred Cisin cisin at
Fri Jun 11 22:51:09 CDT 2021

On Sat, 12 Jun 2021, Tony Duell via cctalk wrote:
> In both cases it would require an input pin to become an output,
> something that I can't see how it would happen.
> I wonder if in the original list, a '1' was misread as a '7' or vice
> versa. I am told that in some countries the '7' is conventionally
> written with a crossbar across the downstroke to avoid this. My father
> always did this, for all it is not common in England.

50 years ago, I worked for a British physicist who was studying the Van 
Allen belts at Goddard Space Flight Center.
He crossed his '7's.  But, he thought it odd when I slashed zeroes.

More information about the cctalk mailing list