> On 12/15/2019 01:19 AM, Dave Wade via cctalk wrote: >> I wonder if there is any interest here... >> >> -----Original Message----- >> From: [email protected] <[email protected]> >> On Behalf Of John Lawson >> Sent: 10 December 2019 17:41 >> To: [email protected] >> Subject: [GreenKeys] DURA Selectric ASR terminals free >> >> >> Greetings List! >> >> I have a couple of "DURA" Selectric ASR terminals. I also have some limited >> documentation on them. Neither of them work as far as I know. I tried to run >> the one in the pic when I first got it, but it's jammed - so on the shelf it >> went. >> >> They appear to be an 8-level code, dunno if ASCII, EBCDIC, or what. > The punched tape is EIA, I think. There are diode matrices > to convert to the internal Selectric code of rotation and > tilt of the ball. I had one of these hooked to a CP/M > system back around 1980, I used it exclusively as a printer. > > I could likely dig out some code that sent the data to > them. A quick look did not turn up the interface. > I seem to recall it had some pretty weird logic levels, PNP > Germanium transistors, etc. > > It is possible to trip too many solenoids at one time and > command the rotate or tilt summing levers to exceed the > limits of the ball. That will break bands on the carriage. > I had no problem getting replacement parts when I had that > happen on mine. Not too sure Selectric parts are available > anymore. > > Jon > > >> These are joining the ever-expanding list of "Projects Never to be >> Completed", so if anyone is interested, lemme know. >> >> They are free, you pay shipping, they are about 50 pounds each and will >> require some thoughtful packing. >> >> Local pickup is happily offered, and I could possibly be bribed into >> delivering them within a day's drive of Carson City (weather permitting). >> >> >> Cheers >> >> John KB6SCO >> >> Carson City
Interfacing the Dura 1041 is very well covered in the book 'THE SELECTRIC INTERFACE A Hands-on Approach' by George Young. There are whole chapters on the Dura 1041 printer, encoding the Dura eyboard, interfacting the punch, tape reader and more. Steve.
