4 May
2016
4 May
'16
5:52 p.m.
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
4 May
4 May
5:59 p.m.
Most punches with a parallel input can be cross
wired to a parallel port.
If the strobe is upside down, you can use one of the other signals.
Many punches have a jumper for the strobe polarity.
Dwight
________________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Charles Dickman <chd
at chdickman.com>
Sent: Wednesday, May 4, 2016 5:52:29 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Facit 4070 to PC interface
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
8:32 p.m.
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
8 May
8 May
10:21 a.m.
Thanks for the link! I didn't know about it. Looks like a pretty straightforward
trick, very helpful.
Marc
On May 4, 2016, at 8:32 PM, Bob Rosenbloom <bobalan
at sbcglobal.net> wrote:
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 
4 May
4 May
10:08 p.m.
Has anyone ever worked up a PC parallel port to Facit
4070 paper tape
punch interface?
Are you talking about a modern USB-parallel cable type interface or the
original PC parallel interface where you could individually control all
the lines?
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.
There are at least 3 versions of the 4070 main board. The earliest (and in
my experience most common) one uses DTL running at 6V. Later ones are
TTL. However in all cases I've had no problems directly connected TTL signals
to the 4070. No idea what modern 'TTL compatible' (but not real TTL) would
do.
-tony
5 May
5 May
5:27 a.m.
On Thu, May 5, 2016 at 7:08 AM, tony duell <ard at p850ug1.demon.co.uk> wrote:
FWIW,
In cases where a real parallel port is missing (happens all the time
now), you can easily and quite cheaply
use an Arduino-type microcontroller instead.
Easily programmed, comes in 3.3V and 5V versions (for the I/O pins),
and many (most?) versions have usb already on board.
HTH
--
Regards,
Torfinn Ingolfsen
Has anyone ever worked up a PC parallel port to
Facit 4070 paper tape
punch interface?
Are you talking about a modern USB-parallel cable type interface or the
original PC parallel interface where you could individually control all
the lines?
3101
days inactive
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days old
5 comments
6 participants
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