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Raspberry Pi Forum What's that green glow? Dumb terminal for Raspberry Pi
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Related

What's that green glow? Dumb terminal for Raspberry Pi

fustini
fustini over 12 years ago

I was at Mini Maker Faire Evanston last Saturday night when a green glow caught my eye.  Walking closer, I noticed it was a dumb terminal... connected to a Raspberry Pi!

image

Ed Bennett, my fellow Pumping Station: One member, explains how he hooked up his old Televideo 910 dumb terminal on his blog.  Who says it takes a $500 tablet with Angry Birds to make today's kids happy?  These two seems to be quite intrigued with the glass teletype!

image

Cheers,

Drew

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  • morgaine
    morgaine over 12 years ago

    Haha, excellent!  image

     

    I now feel so sad that I threw away all my dumb terminals, both green and amber.  And the fact that modern Unix computers are small enough to embed within the terminal itself makes this doubly appealing.

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  • fustini
    fustini over 12 years ago in reply to morgaine

    That's a great idea to put it inside... but I don't we can called it a dumb terminal anymore! image

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  • morgaine
    morgaine over 12 years ago in reply to fustini

    It's just occurred to me that some youngsters must have no idea why a "terminal program" is called that. image

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  • johnbeetem
    johnbeetem over 12 years ago in reply to morgaine

    Morgaine Dinova wrote:

     

    It's just occurred to me that some youngsters must have no idea why a "terminal program" is called that. image

    I've always liked the term "glass teletype".  That's even harder to explain.  There's good archival metal teletype footage in The Andromeda Strain (1971 -- now with less bell!) and While the City Sleeps (1956).  Wow, I love that sound -- it makes your computer sound like it's doing something important.

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  • johnbeetem
    johnbeetem over 12 years ago in reply to fustini

    Drew Fustini wrote:

     

    That's a great idea to put it inside... but I don't we can call it a dumb terminal anymore! image

    I guess you could call it a Heathkit H89 :-)

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  • Former Member
    Former Member over 12 years ago in reply to fustini

    but I don't we can called it a dumb terminal anymore! image

    Many of the 80's era dumb terminals probably had a lot more computing power than people realise, all down to the economies of mass produced cheap cpus. 

    One of the places I worked, long time ago now, was a subcontractor building some HP dumb terminals. The terminal had an 8086, something like 512KB ram, 1MB rom and lots of nice high voltage stuff to run the tube all on a single pcb that was only barely double sided. We were building 286 PC's at the same time that realistically weren't that much more powerful, they just had far better peripheral options.

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  • dabidoh
    dabidoh over 7 years ago

    Your pal Ed Bennett whose Televideo 910 dumb terminal is featured here - is it possible that he might lend a bit of expertise a fan endeavor of ours?

    We're looking for any 'dumb' terminal from the 70's or 80's that has the same look as the terminal used on the cover of Kraftwerk's Computer World, one that works and on which we might display ascii art of the band or at least the album cover. It's a fan project. We're specifically buying a Hazeltine 1500 unless a far cheaper option appears.

     

    Likely we can interface any functioning terminal with a Raspberry Pi and a rs-232 serial could talk to it for sure

    https://en.wikipedia.org/wiki/Computer_World

     

    In the off chance that I don't see a reply here, feel free to cc us at dsanborn at gmail dot com and THANKS in advance!

     

    Dave

    image

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  • genebren
    genebren over 7 years ago

    I love it!  I spent so many hours in front of one of these back in the dawn of time.  Sometimes I miss those times when computing was more about programming  and less about all the shinny things that people use today. image

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  • rew
    rew over 7 years ago in reply to dabidoh

    Hi Dave,

    Alas, I don't have one of those for you. But I do want to warn you. I started buying USB-RS232 dongles a long time ago. At first they came with MAX232 chips inside. Then with cheap clones and then with... nothing. Apparently if you invert the signals it will usually work for long enough for the complaint-period on ebay to expire.... Now, modern RS232 recievers will have evolved to accept such signals but older hardware has not. So you'll have to search for a "real RS232 signal level" interface to be able to connect the terminal.

     

    Good luck!

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  • dabidoh
    dabidoh over 7 years ago in reply to rew

    There's always a 'gotcha' it seems. Some usb-serial converters tout specs like "True 3.3V CMOS drive output and TTL input."

    I wonder if pin voltage has any bearing on "real RS232 signal level"?

     

    Do any of these look authentic or usable in your opinion?

     

    This one from Digikey

    This one on eBay

    This one on Mouser

    This CHEAP one on Mouser

     

    If you're curious, this is the Hazeltine we're considering buying on eBay. It's shockingly expensive and I'm sure that more than a few of us IT people have something similar knocking about in our basements or attics for a lot less.

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