Teletype ASR 33 Part 8: Paper Tape Punch
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- เผยแพร่เมื่อ 12 ก.ย. 2024
- With the receive/print section now working, we turn our attention to the paper tape functions, starting with the punch.
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That is the most complicated confetti generator I've ever seen! :)
Its just making confetti with extra steps
@@Moraren If you think about it, those confetti are actually physical bits. *mindblown*
@@eddyjay83 Oh wow, that is true! Much better than some puny informationless regular confetti. Next birthday im gonna have bits instead of confetti!
@@Moraren How will you ever get them in order though?
@@eddyjay83
I was very shocked to learn the DNA also uses a "serial" protocol during replication.
A moleclular structure steps along (like a serial clock) each unwoven strand of DNA, using the T-G-A-C codes to replicate new strands (like serial data).
It even has "start" and "stop" bits. lol
en.wikipedia.org/wiki/Replisome
th-cam.com/video/8kK2zwjRV0M/w-d-xo.html
What a Hoot. Never thought I would ever see one of those again. I leaned to type on that thing. No wonder I ware out key boards so fast.
You know, you get quite speechless watching these electro-mechanical digital machines. I guess it's the engineering part that takes the breath away. The design of the levers, the springs, the bolts, bits and bobs.....and the timing between them all in order to make everything work.....man. Mountains of manhours.
Now.....question: What about lubrication ? Aren't you supposed to use at least some at chosen points ?
Otherwise Marc. It's just terrific. If I bought a piece of land for every time I wanted to salute you for your efforts, I'd own a continent. Live long !
It's amazing what a motor, some magnets and some very specifically bent pieces of metal can do! I love this series and seeing how it influenced modern computing
That chattering when it is at work, there is something magical about it.
Well Marc, you're surely becoming the Master of Hieroglyphics ! Great job again!
Woohoo restorations! Somewhats oddly satisfying to watch :D
Totally
Marc luckily your machine is that mis aligned that we have the joy of looking how you amazingly can fix all those adjustments and problems. Also for us ASR 33 owners it would be a much easier job if ever a problem occur and just go look at your vid's. I find it one of the most impressive compu equipment that exists. Why? its a keyboard,printer,screen, program storage and reader in one totally mechanical machine.Keep up the good work.
Look at all of the chads. Bush and Gore would be proud :)
Makes you wonder if someone dropped that machine or something for all those adjustments being way out of whack. I find it hard to believe all those adjustments could have gotten out of whack from normal use.
11.5 years I used one of those things daily. One facility had 15 of them on one wall. The three years I was there most all never crapped out. We had two that never worked right. If you had to use them we had work arounds on the issues at hand. Actually quite dependable machines.
That fountain of paper is awesome. Is there something that usually collects those?
Thank you for making these wonderful videos. They are most appreciated.
I can totally understand how people in the 1970s would go "Mechanical terminals are hard let's go shopping for a VDU". But I would still love to own one of these 33ASR's.
It is insane to me that someone sat down to design this, and even crazier that a group of people sat down to freaking build it.
5:00 "Tape nudger" is going to be the name of my first album.
There must have been a thousand HP techs that went around adjusting these things constantly
Very dangerous confetti. If you get one of those chads in your eye, it will tear your eye up with a vengeance.
Every episode is very interesting!
Boy, that punch mechanism needs a little vacuum to suck away all the confetti bits.
Just like you'd eat an elephant. One bite at a time. :D So close. You should totally stick a CuriousMarc or a group tag on the back of the machine, i think it's well deserved.
The KSR-33 was my first printer. The KSR had no punch or reader.
Very nice. Excellent content.
I can stop wibbling over the fact that there's a mechanical machine that's able to talk to a computer. It's like a being from a primordial sludge that's both fungus and bacteria. It's a thing of beauty! :oD
…a paperchip spluttering noisy as hell thing of beauty, but hey! Who's perfect?
…a touchy like a mimosa thing of beauty…
…It's a girl, isn't it?
Well if there was a relay-computer... why not this?
Cool! A friend of mine wanted me to decode some of that tape you are using. Do you know a easy way to decode that data?
You could scan it and feed it to an algorithm made in excel? Marc could probably give you the code behind it.
@@aserta I was thinking in the same vein. can excel process image data? I was thinking of using some python library to somehow turn the images I to bits. I think the excel might be useful at that step. I was kinda hoping someone else had a easy solution
Assuming it’s an 8-bit tape (8 big holes and a small one), it is straight ASCII. Bit 1 on the left (where only 3 bits fit) to bit 8 on the right (the side with 5 bits). A hole is a 1, no hole is 0. The 8th bit is usually not part of the 7-bit ASCII code, but is parity.
There is a program out there - open source, I think - that takes raw scans of strips of movie film and processes them into sets of individual frames by looking for the sprocket holes. Sorry I can't recall what it's called, but it could be a lead.
My mother can read „Lochstreifen“ (punch tapes) without an algorithm, en.wikipedia.org/wiki/Baudot_code. She used to work at a „Telegrafenamt“ in the late 50s and 60s. It was fun to print a birthday telegram on 5m tape.
I'm always in awe of your work area Marc. How do you maintain the order and keep your desks clear? Is the secret lots of sq ft and many shelves? Nice job!
Relentless cleanup. For every restoration session I need to add one cleanup session of half the length afterwards. Same as maintaining a good machine shop.
@@CuriousMarc, oh darn it. I was hoping the secret to an organized shop was something simple, just like losing weight or committing to regular exercise. :-) Thanks.
Bazillions of chads!
Seems a bit tricky to adjust
I'd have thought the pins weren't sharp enough, or is filing them a big no
The last seconds gave me the hint that maybe those poor film studios still have to use equipment like this. What else would be the reason for computers in movies display texts always character by character? 😁
in USSR they used this outdated technology all the way to 90's, until USSR collapsed.
I have two of them that will need major fixes! lol I'm scared of it :P
chads... EVERYWHERE!! unless these have a different name.
"Smell the finish line"
May be the printer burning. (Printer on fire error anyone?)
Maybe it smells like napalm...
or victory.
@@digiowl9599 did someone overclock the line printer again? 😂
I hope Teletype techs got paid well back in the day. These machines are incredible, but seem incredibly finicky.
Why wouldn't the drive holes always be punched? Seems to me unnecessarily complex to have the whole selective punch mechanism for a hole that should always be punched.
Cost. What would a 1970s university computer science department rather pay for - a box of 200 reels of unpunched plain paper tape, or a box of 200 reels of paper tape specially punched with the sprocket feed hole? :)
@@1944GPW My vision where for a punch in the machine that always punches a hole, having prepunched hole just seems like it would be expensive as you say and alignment problems.
Yes that is odd. Either it was cheaper to reuse the already existing parts, or they had another application for this punch that required some of these holes not to be punched. I need to check how the Model 19 does it.
@@CuriousMarc Cheaper to use the existing punch mechanism is what makes the most sense. But it is less reliable.
How does it read hanging and or pregnant chards?
Depends upon whether the reader is electromechanical (probably yes) or optical (no). I guess we'll find out in the next episode . . . .
As complex that this machine is you'd think that they would have had a better solution handling the punchouts.
But where all that punched confetti would go? Just inside the machine???
Chad bucket via asome tubing. I had the chad catcher and tube removed while I was debugging.
@@CuriousMarc Also known as the "Bit Bucket"
So that explains why /dev/null is known as the "bit bucket"...
Yes the infamous bit bucket. That’s where the saying comes from.
i'd like to do so me vintage cnc gcode on tape like this
If you have a CNC vinyl stencil cutter, you can indeed make your own github.com/1944GPW/ptap2dxf
(it's one of my projects)
Another great video from Marc that I'll be referencing when I finally get to working on my own ASR33, patiently waiting and gathering dust right now.
First and a like!
You get sticky tape bit 8!