[NTLK] NewtonTalk Digest, Vol 62, Issue 19

Helmut Fischer h_fischer at gmx.de
Tue Feb 26 09:52:43 EST 2019


the Newton definitely uses more than 3 wires for serial communication with a Pc, Mac, printer or LocalTalk network. With serial keyboards I don’t know, maybe in that case 3 cables are enough. My advice would be to find the right complete MiniDIN8 - DB9 cable wiring diagram and try again.

I used to have such wiring diagrams at hand 20 years ago, when I soldered them myself. Currently there might be people here in the list who have to dig less deep than myself. If not, ask again, and I’ll start digging :-)

Success, Helmut

> Am 25.02.2019 um 18:00 schrieb newtontalk-request at newtontalk.net:
> Message: 1
> Date: Sun, 24 Feb 2019 12:42:38 -0500
> From: Tere <tjggriffin1 at gmail.com>
> To: newtontalk at newtontalk.net
> Subject: [NTLK] Ser-001 Pins
> Message-ID:
> 	<CAEAFf-p071kDRb3oNUxCtf6tQ=J=dE4zbewr50uCOMqmSQ6naw at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
> I decided before investing in mini din 8 to DB9 cable that is longer than
> necessary, I'd try to slice one together from what I've got. I checked the
> continuity of my cables, cut off the ends and tested which pins go to which
> wires. I found a pin mapping and spliced them together. The result was less
> the a foot long. Perfect. I tested the continuity again and the connections
> were good.
> But it didn't work. I know my Ser-001 is good, as I used to connect a
> Stowaway keyboard to my Newt. I think the problem is that the DB9 cable
> only had three wires, ground, Txd and Rxd. For standard serial that should
> be enough. Does the Newton use other pins? Is it possible that I need to
> re-seat the Ser-001, even though the ketboard works?
> The cabling solution I have now uses the Newton Connect port since I don't
> have a
> mini din 8 to DB9. I would loike to get away from that.
> Thanks!
> - Tere

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