[GreenKeys] Printing Selectric

[Clay Archer]

In the late 70's I worked on a project to interface an IBM Selectric to an
Imsai computer.   I worked mostly on the software side of it, but I recall
the hardware mods to the Selectric were minor.     On the software side I
wrote a translation from ASCII to the tilt & rotate code needed by the
Selectric, with a lot of timing loops to delay for the hardware.    It seems
like it interfaced with one 8-bit I/O port and used less than 8 bits  (5 or
6 bits?).    On the hardware side I think it only involved adding a small
circuit board with driver transistors and a couple solenoids.    I recall
that it worked, but was very slow.  

Clay

 

 

From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Dave Wade
Sent: Wednesday, October 31, 2018 3:52 PM
To: 'Josh Bensadon'; greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Printing Selectric

 

Josh,

Yes it's a Selectric.

Dave

 

From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of Josh Bensadon
Sent: 31 October 2018 21:46
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Printing Selectric

 

Does anyone know if this is a Selectric?  It does not have any interface
(it's a future project of mine to build one for it.)

 

The other picture is of the Olivetti ET 121 that's for sale if anyone wants
a Daisy wheel typewriter with computer printing interface?

Working the last time I tried it.

 

Thanks

Josh Bensadon

Toronto

 

 

  _____  

From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
on behalf of Jeffrey Angus <jdangus at att.net>
Sent: Wednesday, October 31, 2018 5:38 PM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Printing Selectric 

 

On 10/31/18 4:18 PM, Keith Lueck wrote:

I seem to recall that regular Selectric type balls didn't fit his
machine, which was a drag.

When I was at TRW in the mid '70s, I had one of the "bastard"
golf balls. When our secretary went off to get coffee, I'd switch
balls on her machine.
They'd come back and the Selectric would type gibberish.
I was known as "The guy who could fix that."

Smirk, I did that for three years. Never got caught.



-- 
"I am a river to my people."
Jeff-1.0
WA6FWI
www.foxsmercantile.com


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