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Duane Benson
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Re: ASR?
Duane Benson   8/29/2013 5:14:06 PM
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When I used one of these things, the tape was all black. I was a law enforcement explorer scout at the time and the police department would let us kids run dispatch. We were really cheap labor.

If I recall correctly, it could receive automatically when idling: The state computer would sometimes broadcast messages to be printed on the paper. The number of bells would indicate the level of importance.

When I had a license to run, I'd type it on to the paper tape. When done, I'd then cut off the paper tap and feed it into the tape reader, which would send it off to the state computer. Several minutes later, the reply would print out on the roll paper.

Pretty hi-tech for the mid-70's in the logger town I grew up in.

I'm somewhat envious and can envision all sorts of fun uses for one of those things.

kfield
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Re: Love this old stuff!
kfield   8/29/2013 5:02:31 PM
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Thanks for the office tour - a bit like a Curiosity Cabinet! I'm intrigued by the radioactive marbles and wonder why you didn't call out the propeller beanie??

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:55:37 PM
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@David: Is it half red and half black (red = tx, black = rx)?

The current tape is just black, but that's not to say that the machine couldn't handle a red/black tape -- when I get it working I'll stick a red/black tape in there and see what happens -- thanks for thinking of this...

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:52:30 PM
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@David: At a quick glance looks like the default is FDX which makes life much easier for a converter...

You are lucky I don't live in the same town as you, or every evening I'd be knocking on your door whining "Daavvviiidddd -- can you ..." :-)

Max The Magnificent
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Re: Love this old stuff!
Max The Magnificent   8/29/2013 4:50:31 PM
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@kfield: But Max, what's that arm doing in your office??

That's the remains of the last manager who gave me a hard time ... but don't worry ... he's "armless" now LOL

Didn't you see my Welcome to the Pleasure Dome (My Office) video?

Dang ... now you've set me off again:

In Xanadu did Kubla Khan
A stately pleasure-dome decree:
Where Alph, the sacred river, ran
Through caverns measureless to man
Down to a sunless sea.

 

David Ashton
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Re: ASR?
David Ashton   8/29/2013 4:46:09 PM
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And if it's half duplex it can be local battery or remote battery.......

The ribbons look the same as the ones we used to use on the Siemens T-100s.  

Is it half red and half black (red = tx, black = rx?

There's some data here:

http://www.pdp8.net/pdp8cgi/query_docs/query.pl?Search=teletype&stype=Partial+Wo

At a quick glance looks like the default is FDX which makes life much easier for a converter.  I daresay someone on the site would know lots more.   The site aht led me her had some comments by people who'd tried to get one going and had problems as the grease had solidified, so if yours apears to work you're doing well....

kfield
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Love this old stuff!
kfield   8/29/2013 4:41:19 PM
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But Max, what's that arm doing in your office??

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:30:20 PM
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@David: Do you know if it is half-duplex (both send and receive on the same loop) or full (2 separate loops)?


At the moment I don't even know how to change the typewriter ribbon :-)

 

David Ashton
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Re: ASR?
David Ashton   8/29/2013 4:25:21 PM
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Half your luck Max, it is a thing of beauty indeed.  From my limited understanding of these devices, KSR-33's were keyboard only (Keyboard Send-Receive) and ASR-33's had the tape punch and reader (Automatic Send-receive).

I had a lot to do with the Siemens T-100, the European equivalent, but they used Baudot code (5 Bits) not ASCII (7 or 8 bits) like yours.  I also trained on an even earlier British model, the Creed 7B, and had a lot of fun with them, see

http://www.eetimes.com/author.asp?section_id=36&doc_id=1284862

Love the idea of having it greet visitors to your office Max, I howp you get that going.  I have seen an RS-232 to 20-mA loop converter circuit somewhere, but I have no idea where.  Do you know if it is half-duplex (both send and receive on the same loop) or full (2 separate loops)?  

Max The Magnificent
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Re: ASR?
Max The Magnificent   8/29/2013 4:16:46 PM
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@Michael: Ah, I guess the KSR is missing the paper tape, hence only "Keyboard", whereas the ASR has both – "Automatic."

So the bottom line is I'm right and you're wrong -- happy dance time!!! LOL 

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