Dwight K. Elvey wrote:
Hi
By the way, there is a company in Texas some place that
is actually making DTL and most likely RTL as well. They
make parts for obsolete equipment. I've lost the url
but I found it with a search on the web. I was always
afraid to even ask what they were charging for the
parts ( most were mil spec as well ).
Dwight
Just for fun I decided to search for "TTL DTL" on the web.
Here is a bit of information old japanese chips that
could have be used in some early calulators.
http://www.cs.ubc.ca/~hilpert/eec/ics/JMOS.html