----- Original Message ----- From: "Steve Malikoff via cctalk" <[email protected]> To: "Jon Elson" <[email protected]>; "General Discussion: On-Topic and Off-Topic Posts" <[email protected]> Cc: <[email protected]> Sent: Sunday, December 15, 2019 9:15 PM Subject: Re: FW: [GreenKeys] DURA Selectric ASR terminals free
>> 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. I've got a copy of that book somewhere in case anyone's interested. m
