Facit 4070 to PC interface

Charles Dickman chd at chdickman.com
Wed May 4 19:52:29 CDT 2016

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.


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