Facit 4070 to PC interface

[Bob Rosenbloom]

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

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