[GreenKeys] DURA Selectric ASR terminals free

[Clay Archer]

That's probably the article I was thinking about too.   If I recall correctly, I was able to fit the program into one 1702 EPROM.  I got it working and had it clacking away in the shop, the owner was so anxious to demo it to a customer he pulled the power cord and grabbed the Selectric and started to carry it to the sales floor.  Unfortunately, he didn't unplug the ribbon cable and tore the wires off of the connector at the computer.  I had to scramble to re-solder the wires back to the connector so he could show it to the customer.   I don't think we ever sold more than two of the setups though.
Clay
KG7LWX   

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Robert Nickels
Sent: Tuesday, December 17, 2019 9:16 AM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] DURA Selectric ASR terminals free

On 12/17/2019 2:12 AM, Paul Birkel wrote:
> Taming the I/O Selectric (June 1978 Issue #18 part 1: hardware 
> interface and continued in July 1978 Issue #19 Part 2: software):
> 	https://archive.org/details/kilobaudmagazine-1978-06
> 	https://archive.org/details/kilobaudmagazine-1978-07

  Boy that title sounded familiar and sure enough, that's the circuit I used.   Very clever how the hardware was so minimal yet worked just fine.   I wouldn't have known enough about the IO Selectric to figure out how to use the CK line that way ;-)    It would be easy to use an Arduino to drive this logic nowadays and have a serial interface, but no, I'm not interested in going back there!

It is a kick to look back thru the early days of "home computers" in these old Kilobaud magazines, however.  All of Wayne Green's magazines had a good combination of hardware, software, educational, and industry information.   I even saw a product announcement I wrote back in '78  ;-)

73, Bob W9RAN

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