On 5/4/2016 5:52 PM, Charles Dickman wrote:
Has anyone ever worked up a PC parallel port to Facit 4070 paper tape
punch interface?
I found one on a Swedish website. The punch parallel input looks like
it is TTL compatible, but I can't find anything in the documentation
that describes the input voltage specifications.
Chuck
Check this link out:
http://www.chiark.greenend.org.uk/~pmaydell/misc/cardpunch/dongle.htm
It shows how to build a PC to 4070 interface. Basically inverting a few
signals.
Bob
--
Vintage computers and electronics
www.dvq.com
www.tekmuseum.com
www.decmuseum.org
