Before anyone else comments, yes it will be heading to Sam ( Look Mum No Computer)
@unmanaged
2 жыл бұрын
was just about to comment... :P
@LOOKMUMNOCOMPUTER
2 жыл бұрын
hey up it is very intriguing indeed thanks a lot mike!!, for anyone interested it will be available to be seen at this museum is (not) obsolete. :). and ill be dropping something else off for mike to pull to pieces!!!
@tekvax01
2 жыл бұрын
@@LOOKMUMNOCOMPUTER Proper job Sam! Cheers!
@yanikkunitsin1466
2 жыл бұрын
Russian word for "firmware" and process of updating/flashing a firmware to this day is "прошивка" - "sewing in", exactly for this memory type. And Soviet philips-like screws were notoriously shittty because lack of real standartisation, wrong alloys, bad manufacturing a were basically only used once. You may even call them anti-tampering screws. Proper machinery and electronics only used flat-drive screws.
@almostanengineer
2 жыл бұрын
Oh hell this needs to end up in the ‘This museum is not Obsolete’ along with the rest of telephone stuffs, even if it’s just a loan.
@zaprodk
2 жыл бұрын
YES!
@Alexagrigorieff
2 жыл бұрын
К155 chips are TTL, equivalent to 74 series (not 74S or 74LS yet). 74LS would be К555, and 74S would be К533. ЛА1, ЛА3, ЛА7, ЛА8 are different configurations of NAND gate with open collector output. ТМ2 is a dual D-flipflop, equivalent of 74x74.
@MrMaxeemum
2 жыл бұрын
How about donating it to Look Mum No Computer on KZitem? He has a small museum and might be interested in displaying it.
@KrotowX
2 жыл бұрын
During childhood and school years seen these in my parent workplaces and in other Soviet offices. Knew that these devices are related to dialing, but didn't knew in detail. Thanks about explaining.
@TimoNoko
2 жыл бұрын
These weird mega-jumbo magnetic rings were standard issue in Russian military equipment. That is how they stored parameters in the tube-based missile controller I was fiddling with while in Finnish Army in 1970s.
@TheKelikat
2 жыл бұрын
в приборе много деталей из 70
@karaffens
2 жыл бұрын
Probably also quite relieable in harsh conditions 🤔
@forinti
2 жыл бұрын
When you could trust your users weren't dummies!
@NillKitty
2 жыл бұрын
This is how ANI-B used to work in the US; which was used when your local phone switch needed to obtain your phone number and send it forward (as tones) to a centralized billing system (e.g. CAMA). They ran your physical phone line through a series of rungs corresponding to the last 4 or 5 digits of your telephone number; and when your switch connected to the accounting system trunk, a polarity reversal triggered your local switch's register/sender to bring in the ANI-B system, apply a high frequency tone to your line, and detect which digits (in which positions) to register in the marker [IIRC].
@SeanBZA
2 жыл бұрын
Have an even older Japanese version that can handle 20 stored numbers of up to 12 digits, using figure 8 shaped ferrite cores, and all discrete transistor logic inside. It works by running a single sense wire through all the cores in a row, and then generating a current pulse through the digit wire, and having a counter generating the dial pulses, running through the pulses till the sense wire for a digit stops the count. End of number is another core, that does an inhibit of dialling before the first pulse is created, unless you are using all 12 numbers, which automatically does the inhibit on the end of the last digit. Was used for many years in a pharmacy to call suppliers, storing all the common numbers for them, so the pharmacist did not have to look up the numbers, instead having memorised which button was the desired one. Press the button and press start, and wait for the speaker to have the ringing tone, or a busy tone, and then, if busy, you pressed reset, which dropped the line, or picked up the phone, which also reset the device, but also connected you to the line as if the device was not present. Old, dates from the 1970's, and all very crusty inside as well, but a fascinating bit of by now very crusty yellowed beige plastic and old SRBP board, with dozens of small separate soldered in daughter boards, some potted, some not, and not an IC anywhere in sight in it. All boards are tinned copper traces.
@zakhars7546
2 жыл бұрын
Неожиданно) спасибо за обзор, я прям вспомнил детство, МП39-МП42, к155ла3, схемы в инструкции, все такое родное)
@TheKelikat
2 жыл бұрын
в том и странность что германий вместо кт315, хотя в перемешку со 155
@trevorhaddox6884
2 жыл бұрын
Look Mum No Computer would love to have this. He actually has the equipment to use it.
@Shiba643
2 жыл бұрын
Rope memory relay sequencer?
@sismofytter
2 жыл бұрын
Imagine having to "program" these in an office environment 😱
@electronbox
2 жыл бұрын
Imagine Karen programming it.
@sismofytter
2 жыл бұрын
@@electronbox 😂😂 That would triple the time doing it
@chveyk
2 жыл бұрын
Это не "магнитная память". Это "магнитный дешифратор", позволяющий простой протяжкой провода сквозь кольца задавать набираемые цифры. В последующих реализациях данный узел заменялся в начале рядом "джамперов", а потом вообще всё перенесли в "микроконтроллер"(580ВМ80)
@Doppelhorn
2 жыл бұрын
While this is not an example of "core memory", where information is stored in the magnetization of the cores that can be changed (RAM), this device does make use of a "rope memory" much like the ROM that was used in early computer applications for permanently storing (or "encoding", if you prefer) programs and data. Хотя это не пример «основной памяти», где информация хранится в намагничивании сердечников, которые могут быть изменены (ОЗУ), в этих устройствах действительно используется «веревочная память», как и в ПЗУ, которое использовалось в ранние годы. компьютерные приложения для постоянного хранения (или «кодирования») программ и данных.
@Ma_X64
2 жыл бұрын
ВМ80 -- значился как процессор, а не контроллер, и требовал немало обвязки.
@chveyk
2 жыл бұрын
@@Ma_X64 "немало" - для реализации "компьютера". Для работы в роли "контроллера" - не так уж и много. Могу напомнить, что большинство первых АОНов было собрано либо на ВМ80, либо на его "аналоге" Z80. В общей сложности АОН содержал "аж" восемь корпусов микросхем ;) И имел приличный функционал как для самого АОНа, так и в роли "звонильщика"(если память не врёт - до 128 номеров в "записной книжке" с произвольной выборкой и любым временем дозвона). Чуть попозжа, когда в "наш" мир пришёл прогресс - многие открыли для себя контроллер С51(8051) - кол-во корпусов микросхем в АОНах разительно сократилось.
@Ma_X64
2 жыл бұрын
@@chveyk если что, контроллер это по определению процессор+периферия в одном корпусе. И дело тут вообще не в вычислительной мощности.
@Integral2128
2 жыл бұрын
@@chveyk ВМ80 никак не аналог Z80, ВМ80 аналог говнопроца от интела i80, Z80 имел и частоту больше, и доп инструкции, и работал чуть по другому для более удобного программирования
@gsuberland
2 жыл бұрын
You're right about those chips being 7400 equivalent. There's a fantastic Wikipedia article for the Soviet IC designations: en.wikipedia.org/wiki/Soviet_integrated_circuit_designation - the last digit usually refers to variants of the same logic type. On there I can see К155ЛА3 and К155ЛА8 (2-input NAND gates with two different pinouts), К155ЛА1 and К155ЛА7 (4-input NAND and a later production version), and the К155ТМ2 is a D-type flip-flop. Be careful when you search for these because "К" is not the same as the Roman character "K", and "ТМ" is not the same as the the Roman characters "TM", even though they look very similar! (and quite literally identical on KZitem's font)
@museumrza
2 жыл бұрын
Спасибо автору за рассказ, как-то раньше не попадались такие девайсы. Посмотрел, оказывается были и Трель-1, и Трель-3.
@djonidon
2 жыл бұрын
Я только видел рекламу в журнале Радио.
@yoksel99
2 жыл бұрын
The PCB material is actually the usual fiberglass soaked in epoxy. What gives it papery feel is the glue that was used to attach the foil that was etched out. And of course having no solder mask is an absolute soviet tradition.
@pashko90
2 жыл бұрын
Still to current days.
@thelittlebigoneru
2 жыл бұрын
@@pashko90 still to current days what? :) FR4 as PCB substrate of lack of soldering mask?
@pashko90
2 жыл бұрын
@@thelittlebigoneru Some army pcbs i seen without a soldering mask.
@thelittlebigoneru
2 жыл бұрын
@@pashko90 probably, it was transparent mask, it is used to enable visual check of condition of copper layer. Copper, exposed to ambient air, is strictly prohibited by regulations and can't pass military QA, not in soviet era, not today.
@leosbagoftricks3732
2 жыл бұрын
Love this! Reminds me of the "Tormat" memory used in Seeburg Jukeboxes to remember the song selections. Tormat = toroid matrix.
@TrebleWing
2 жыл бұрын
Came from Look Mum No Computer. Both are very fascinating vids! Thanks for getting into more of the metal. I loved hearing about it and seeing this clever tech~
@DanBowkley
2 жыл бұрын
This smells a lot more like an array of very small current transformers than actual core memory to me.
@BrekMartin
2 жыл бұрын
There is core rope ROM (this) and core RAM. Entirely different concepts. Both used in Apollo craft.
@gnored
2 жыл бұрын
For the first time I actually understand how these cores work. Rather ingenious, actually.
@davidblair8843
2 жыл бұрын
It’s videos like this that make me wish KZitem had something stronger than thumbs up. This is awesome!
@iamjadedhobo
2 жыл бұрын
I just love the look of those transistors. A work of art in itself.
@pvladi
2 жыл бұрын
if you file the cap off they become phototransistors
@ДаудМухамеджанов
2 жыл бұрын
Comrade, almost or probably everything that he has touched was produced in a single country in full cycle: from instruction manual to ICs.
@iamjadedhobo
2 жыл бұрын
@@pvladi I've got a pile of 2N3055 for that :)
@RonLaws
2 жыл бұрын
when you said core rope memory i imagined some kind of way for you to program the numbers in electrically, i was not expecting instructions on literally wiring the number in by hand in this way, very interesting
@djmips
2 жыл бұрын
On the Apollo computer you will see videos of workers sewing the ROM, which is mind boggling. Every release required the rope memory to be updated.
@RambozoClown
2 жыл бұрын
When I was a kid I found something similar at a charity shop but it was an electro-mechanical version. It had a plastic film that was driven by a small motor over sprockets. On one side was a sliding pickup with two contacts that rode on the film. You slid it up and down to select the number to dial, then pressed a button to start the film drive. On the film were places to fill in squares with a conductive pencil to "program" the numbers to dial. To dial a three you filled in three squares, etc. As the conductive squares passed over the contacts, it shorted them performing pulse dialing.
@stevebollinger3463
2 жыл бұрын
My grandfather had one of those. In the late 1970s. It basically was like filling in a scantron test. And as you say instead of writing a 1 or a 3, you filled in consecutive squares. You could hear it go click click click as it dialed. It ran the pulses out at 10/s just like a dial. Essentially that system didn't store the numbers at all. It didn't even have any idea what it was dialing. It even looked like this unit in general shape, with the belt on the left where the cores are here. And you have to life the cover to program it like on this, but of course you did it differently. You wrote in the name of the person associated with the number on a piece of paper which was covered by a clear part of the cover when you closed it. The best was erasable, but I wouldn't push it as it never got completely clean. I can't remember who made it now.
@lumsdot
2 жыл бұрын
i guess you could also use a photo transitor to detect the pencil marks
@grzegorzbrzeczyszczykiewic199
Жыл бұрын
"look mum no computer" would love this
@Enigma758
7 ай бұрын
You know he acquired it from Mike and now has a few videos about it.
@grzegorzbrzeczyszczykiewic199
7 ай бұрын
@@Enigma758 😮
@paulfletcher848
2 жыл бұрын
Hi Mike, give to Sam to connect to his Strowger PBX. He may well turn it in to a programmable music sequencer too.
@TheManLab7
2 жыл бұрын
DO IT MIKE!!!
@krzysztofwaleska
2 жыл бұрын
Incredible! Few ferrite cores, tranzistors and TTL chips, and they made ~1kB of memory with their logic function. Simple, clever, a little bit hard to use, but you do it once. As a reward you can feel like 60'-70' computer science doctor.
@Engineer_Stepanov
2 жыл бұрын
Трель-2, чего только не выпускали, только мало у кого такое было.
@tituszx1
2 жыл бұрын
Кому было надо, сами паяли в радиокружке, вплоть до компьютеров
@TheKelikat
2 жыл бұрын
даже не знал о таком чуде, хотя и не надо было, телефон появился году в 2008. но тут явно собрано из ненужных деталей. военное смешано с бытовыми 70 годы с 80. при этом плата военная, значит делал военный завод из того что было. для гражданки они бы взяли гетинакс
@electrofan7180
2 жыл бұрын
I believe the thing was designed in 1970s and produced so long just because of planned economy. I have 1980s "Виза-32" (Visa-32) which obviously was more modern design and also massively produced at same time. It uses RAM ICs for storing data. But of course if your AC power fails and you forgot to check and replace backup battery before then... well, you just need to program everything again☻
@ViserChannel
2 жыл бұрын
Как трудно выговорить трель)
@cyberneticinterfacemodular3996
2 жыл бұрын
Russians made fantastic steam irons i still have one from the early 80s in working order.
@PINKBOY1006
2 жыл бұрын
I've always wanted one of these. They're are a bunch on ebay at the moment. Nice to see one taken apart.
@caver1
2 жыл бұрын
My best guess - it would have allowed a secretary, to connect a military commander, to a number, with out them being knowing what the number is. Especially if the phone was screwed down to the base, with tamper proof screws. Press the number and lift up the receiver once it started ringing to HQ :) Likely as not, it would have been on the separate military phone network, hence only 7 digits needed.
@eDoc2020
2 жыл бұрын
I'm sure people back then knew that they could count the relay clicks to learn the number.
@yanikkunitsin1466
2 жыл бұрын
No, regular device for reception or secretary in relatively small organisation. 7-digit was maximum local phone number length in USSR (not counting region/town codes).
@tHaH4x0r
2 жыл бұрын
Absolutely beautiful, what a piece of art and history.
@DextersTechLab
2 жыл бұрын
love that this required careful thinking just to program the numbers! Fascinating bit of tech!
@movax20h
2 жыл бұрын
Nice. Fascinating to see rope core memory. I was expecting complex and hard to use system, but actually this is pretty easy implementation, and very easy to program.
@andljoy
2 жыл бұрын
That is just amazing. Its also amazing that it has a schematic and PCB layout.
@pashko90
2 жыл бұрын
As a Russian-American, i seen a lot of stuff like so in person. A lot of army/military things are so interesting to take apart to see how things goes.
@ThriftyToolShed
2 жыл бұрын
That's weird and amazing at the same time. Crazy how behind that tech was for the time, but it worked!
@NS-gx9mx
2 жыл бұрын
Great Video! But could you please upload a scan of the manual too? Didnt find it on the Internet, i also have the same machine.
@lauram5905
2 жыл бұрын
Some thoughts: I’m really enjoying reading translations of some of the Russian comments on this video, the idioms, especially in an argument are quite funny Also i was born after the age of pulse dialling, but since the phones of the time used actual dials, I imagine a device like this was a godsend for efficiency and not tearing your fingers up on a busy day like I’m told happened I wonder how expensive this was at the time, it might be a cultural thing but I can imagine outside the office, housewives and families with things like this for their friends’ numbers
@BrekMartin
2 жыл бұрын
Was going to announce that core rope isn’t storing anyone’s phone numbers until I see the thing almost sent as a kit you have to weave the damn thing yourself haha top stuff :D not too dissimilar from old ham radio VHF that had the user wire a diode matrix for their channel selection.
@ghos7bear
2 жыл бұрын
Apparently it was late 70s. No idea how it remained in production till 95.
@michaireneuszjakubowski5289
2 жыл бұрын
It's the fate of most late combloc era utility products. For example, the most popular light-duty truck around in Poland in the 90s was introduced in the 50s, received the last lift in 1970, and was then made until 1998 with basically no further changes. It might have had to do with the depression and chaos of the 80s. A lot of modernization/development programs were nixed at that time, both in the USSR and in other combloc countries, across various fields.
@uhrbexer9134
2 жыл бұрын
Indeed, the motto was never change a running system. That was ensured by overboarding bureaucracy, lack of motivation and scarcity of almost everything. Like in GDR the Trabant car, whose body was cased in phenolic rag and cardboard from 1958 to the end of production in 1991.
@cranegantry868
2 жыл бұрын
Quite amazing look at Soviet tech in 1985. Core memory was practical. Nice to see you have it working too!
@thelittlebigoneru
2 жыл бұрын
it was VERY strange device even from standpoint of 1980 soviet electronics engineers :) kinda pun toward all of the rest of progressive humankind :) 😁
@imark7777777
2 жыл бұрын
How dare you say phone equipment isn't interesting. Oh wait I'm not normal.
@sonofeloah
2 жыл бұрын
Join the club, kiddo!
@imark7777777
2 жыл бұрын
I grew up in the middle of nowhere NY the phone line ended at our house and they ran spurs to two other houses and then there was a gap for a mile where there's no utilities. I figured out how things worked pretty quick.
@HappyBeezerStudios
7 ай бұрын
check out strowger step-by-step telephone exchanges. Pure electromechenical phone ASMR
@adamthethird4753
2 жыл бұрын
With all due respect sir, clearly you know far more about circuits than I do. But the pencil pointing at the old schematics was...making me nervous. Thanks for your video! New Sub!
@uhrbexer9134
2 жыл бұрын
It's like explaining a Picasso hodling a glass of red wine.
@bigclivedotcom
2 жыл бұрын
What a bizarre device. Programming in the full set of numbers must have been quite time consuming. Especially if you miss wired one of the first layers and only found out at the end. I would have thought that plug-in jumpers could have been a lot simpler.
@tituszx1
2 жыл бұрын
In this case You need 560 jumpers with good contact
@McTroyd
2 жыл бұрын
Perhaps one could just disconnect the ends and pull out the wire?
@SudaNIm103
2 жыл бұрын
In the eyes of a telephony engineer, such a wiring configuration would hardly even be considered a trifle; a run of the mill patch panel could require 100 times as many wires. Given the era, I’m inclined to believe that in many if not perhaps most cases the average end-user wasn’t configuring the device themselves, but perhaps I’m wrong.
@shieladixon
2 жыл бұрын
I've seen magnetic core memory before but didn't know about this type of read-only programmable memory. It's fascinating! I arrived here from Sam's video - when he mentioned you it was a surprise because we met at Gaussfest recently. I don't know why I haven't been subscribed to your channel since then, but that''s remedied now. Thanks for this.
@BrekMartin
2 жыл бұрын
Yeah magnetic RAM would work, but back to needing a processor again to read and rewrite it.
@davida1hiwaaynet
2 жыл бұрын
Fascinating! Thanks for sharing this with us. Love the old Cold War era tech.
@OrinSorinson
2 жыл бұрын
This was a lot easier to understand than I thought it would be. It's such a simple and smart way of doing it.
@hollybrereton3140
2 жыл бұрын
I think you should give to Sam of 'Look Mum No Computer' to put in the MUSEUM
@RingingResonance
2 жыл бұрын
I second this!
@pdrg
2 жыл бұрын
Amazing, thank you for exploring that for us! What a clever bit of engineering!
@8BitNaptime
2 жыл бұрын
This is from the sad era of the Soviet shortage of jumper links.
@joels7605
2 жыл бұрын
This is amazing. I had no idea core memory was in consumer products.
@djmips
2 жыл бұрын
Specifically, it's Core rope memory.
@jarekjagielski366
2 жыл бұрын
I always said dealing with soviet technology requires a very specific mindset, especially if you are used to western stuff. Living in a post-soviet country I have encountered a lot of their tech as a kid, but only recently came to realise just how different some of it was from the equipment that trickled in from the west in the 90's. Great video!
@maxusboostus
2 жыл бұрын
The components must be upside down to stop all the Electrons falling out, Thats why it still works. The Russians must have figured that out years ago. What a brilliantly simple way of storing numbers. Magical.
@ЮжныйКот-м2э
2 жыл бұрын
У меня в бункере такой стоит.
@uhrbexer9134
2 жыл бұрын
Anyone knows older Siemens Hicom Phones? The standard phone for the lower ranks had 4 or 10 buttons to store numbers. There was an additional boss pad available with 20 or 40 extra buttons to make the owner feel important. So this soviet device seems to be the equivalent to that, as the owner of a phone in soviet times was already very important, but only the most important people who could afford or were acknowledged to buy this device would be able to dial a number with one fingertip instead of bleeding fingers.
@marklatimer7333
2 жыл бұрын
Strictly speaking this isn't core memory, the cores are not actually holding the programmed information, the piece of wire the user inserts through certain cores is the memory. This is really just a glorified peg-board memory using inductive pick-up instead of shorting pegs. It does highlight how American (and by inference much of the rest of the World) technology embargoes with the USSR restricted their electronics industry. How did the West do the same thing at the time - SRAM 1Kx4bits and a Z80 ?
@userPrehistoricman
2 жыл бұрын
It's called core rope memory.
@appliedengineering4001
2 жыл бұрын
technically, It's the ROM version of magnetic core memory. Unlike normal MCM, You can't flip the magnet fields in these cores. In fact, I don't think these cores can be magnetized at all and just act like transformers.
@shadowflash705
2 жыл бұрын
Z80? Are you crazy? It's like using Xeon Platinum as a keyboard controller today. It's a device from around 1972 that was produced with a few small changes till mid 80s. Contemporary solutions for mid-80s were using dedicated chips that are still produced today. Those chips were about 1/100 of a Z80 price and didn't require all the extra chips (and a lot of power) It was all-in-one solution - you need a keypad, a few resistors and capacitors, and one or two transistors plus microphone, speaker and a microswitch - and you got yourself a phone with keypad and redial option, about 2 years later - also with number memory for up to 16 numbers. For Z80 - in late 80s-90s those were used in what was basically a landline smartphone of the time - phones with screens, large number memory (some of them - even with NVRAM), notepad, calculator, Caller ID etc. Some of them even had dot matrix displays and built-in games.
@TheKelikat
2 жыл бұрын
SRAM дорого стоили. был любительский телефон на z80. при отключении электричества информация пропадала. этот прибор из устаревших деталей 70 годов. они стоили не дорого
@mjouwbuis
2 жыл бұрын
The west and far east would have used an ASIC dialer chip or possibly something like a MAB84xx or PIC16xx controller, both combined with an EAROM. A Z80 was far too powerful and expensive.
@ReallifeBambiDeerattheFarm1
2 жыл бұрын
It would be interesting to have this paired with a 1950's Western Electric rotary phone.
@chriscody2852
2 жыл бұрын
Absolutely fascinating. Mind blown.
@TheKelikat
2 жыл бұрын
зелёные резисторы очень старые военные. возможно полые. 13:52 в военных приборах этот тип конденсаторов не применяли. 14:08 на военных блоках транзисторы приклеивали. странный набор деталей
@alexanderismylove
2 жыл бұрын
The green resistors are very old military ones. Probably hollow. 13:52 this type of capacitor was not used in military devices. 14:08 military units had transistors glued on them. Strange set of parts.
@TheKelikat
2 жыл бұрын
@@alexanderismylove в первой строчке наверно никто не понял. и похоже я ошибся. тут резисторы бытовые ВС-0,125. мне показалось что это военные МТ-0,25, они крупнее. МТ-1 и МТ-2 трубки, другие советские резисторы таких размеров на керамических стержнях. У МЛТ-2 внутрений диаметр трубки всего 2мм.
@karaffens
2 жыл бұрын
At least no bitrot problems like modern cheap flash memories found in USB sticks and phones..
@davemould4638
2 жыл бұрын
I have not heard of such problems. There are however many cases of people fraudulently selling low capacity USB memories that pretend to be higher capacity devices - so after you store as much data as the real capacity of the device, storing more data will overwrite and corrupt the whole thing.
@karaffens
2 жыл бұрын
@@davemould4638 I have had problem with bitrot several times with both flash in phones and usb sticks..
@cthoadmin7458
2 жыл бұрын
"Bald and Bankrupt": Soviet? did you say Soviet?
@jamesplotkin4674
2 жыл бұрын
I imagine this was a very expensive piece of kit back in it's day.
@thelittlebigoneru
2 жыл бұрын
It was intendend for managers of medium-sized (state) enterprises. Not for secretary of average soviet boss, but also not for top-level bosses, who has full stuff of secretaries with hier education :)
@fmdj
2 жыл бұрын
Fascinating! And to think my grandparents had issues programming phone numbers into their smartphones...
@Reaktanzkreis
2 жыл бұрын
The Siemens Company used the same technoligy in their old P.A.P.X. switches for a short dialing facilities at the switchboard. The different to the dialler in this video is, Siemens use a single botton with the name for each destination on it. Like the bottons at an entrance panel at a block of flats. Their employs a large number of relays instead transistors due to the hgh prices at those time. A storage with 12 digit number for 100 destinations filled a complete rack in selctor row. They used the 2 out of 5 scheme.
@felenov
2 жыл бұрын
I have seen similar machines used with modems. Those were very rare since it was custom built for government use.
@eugenemlodik8286
2 жыл бұрын
Actually not, it was available for cash at local electronic stores, but price was high AF.
@Stjaernljus
2 жыл бұрын
This thing screams Sam from LMNC
@marcus0018
2 жыл бұрын
just what I was thinling
@Dyas777
2 жыл бұрын
Simple and beautiful. Thank you for this video.
@rrb6544
2 жыл бұрын
Amazing device… so clever!
@heikovanderlaar3780
2 жыл бұрын
Mike, can you tear down the James Webb Space Telescope please? Seems like just your kind of thing.
@falksweden
2 жыл бұрын
#shorts :D
@TheEPROM9
2 жыл бұрын
This is why I love old soviet stuff. I have my collections of old sovu\iet electronics.
@TheBrick2
2 жыл бұрын
When I say the title I wondered if it was going to use some form of hysteresis to store the bits.
@andymouse
2 жыл бұрын
Fascinating bit of kit, 1 number for home and 39 for the Kremlin, love the mug you've got there ! Happy new year to you and and your's....cheers.
@Tranzeis
2 жыл бұрын
All I see is stupid Soviet jokes in the comments. This is a brilliant machine made with limited resources and it still works after almost 40 years flawlessly!
@samuellourenco1050
2 жыл бұрын
I've seen two "stupid" comments, including mine. Sorry, but this is a stupid way of configuring numbers.
@Tranzeis
2 жыл бұрын
@@samuellourenco1050 why so upset that my comment prevented many more (except yours)?
@44Bigs
Жыл бұрын
Literally a piece of space technology (the rope core memory) on your desk, amazing! I wonder if they advertised it as such at the time.
@SudaNIm103
2 жыл бұрын
The digit encoding struck me as a bit interesting. ("Read More" for a Table below.) The lowest binary symbol starts with four [0b0100] which seems kind of arbitrary. Presumably zero [0b0000] is just NULL, but I wonder what if any undocumented functionality might result if one were to wire encode for symbols: one [0b0001], two [0b0010] or three [0b0011]? ( Less notably fifteen [0b1111] is seemingly unimplemented as well.) Perhaps four was just the first wire pattern capable of reaching a saturation state, but I can't exactly intuit why. If something like that were the case I'd think four [0b0100] and eight [0b1000] would be a problem too while three [0b0011] would not. Alternatively, perhaps this arrangement just somehow simplified implementation of the pulse encoding matrix. Any thoughts? DIAL BIN DEC {∅} ~ 0000 = 0 (?) ~ 0001 = 1 (?) ~ 0010 = 2 (?) ~ 0011 = 3 [0] ~ 0100 = 4 [9] ~ 0101 = 5 [8] ~ 0110 = 6 [7] ~ 0111 = 7 [6] ~ 1000 = 8 [5] ~ 1001 = 9 [4] ~ 1010 = 10 [3] ~ 1011 = 11 [2] ~ 1100 = 12 [1] ~ 1101 = 13 [ . ] ~ 1110 = 14 (?) ~ 1111 = 15
@sillysad3198
2 жыл бұрын
K155 is original TTL w/o Shottkey.
@UElectronix
2 жыл бұрын
It's clone of original TI 74xx TTL family.
@dimitar4y
2 жыл бұрын
i love how these looked
@masterfoxxhun
2 жыл бұрын
Ah yes, good old soviet TTL's with 2.5mm pin pitch instead of the pesky imperial 2.54mm. I wonder if this was intentional or just Ivan had only a ruler in his hand when examining some freshly new smugled ICs
@blahfasel2000
2 жыл бұрын
My money is on intentional. The Soviets were pretty aggressive with metrificating everything. For example even to this day Russia and a few other ex-Soviet states (plus Mongolia for some reason) are the only countries in the world that use metric altitudes and speeds in aviation.
@AureliusR
2 жыл бұрын
@@blahfasel2000 That's not true. Almost the entire world uses meters for altitude, *except* for North America. For speeds, I think it varies, but the ICAO encourages km/h or m/s depending on what is being measured.
@JanCiger
2 жыл бұрын
Intentional. They had the same ICs for export with imperial pitch too.
@Anvilshock
2 жыл бұрын
@@AureliusR International standard, certainly for controlled commercial traffic, is feet (including FL) and knots. Stop bs-ing people. Russia does still use metres, but only up to transition level (10k ft/3050 m).
@GodmanchesterGoblin
2 жыл бұрын
@@AureliusR Have you ever flown in different parts of the world? Altitude is always in feet, speed in knots (nautical miles per hour). It's the same in the UK, in Europe, the US, south east Asia, etc. Aviation uses common standards because it is critical to the safety of aircraft and those on board.
@grimreboot
2 жыл бұрын
Awesome, thanks for the upload :)
@fredbloggs4829
2 жыл бұрын
This isn't really like the Apollo flight computer, in that the "memory" is the actual run of the wires, not memory which is magnetically stored in the cores.
@DiThi
2 жыл бұрын
The AGC had both ROM and RAM: the ROM worked exactly like this, while the RAM is the one that stored data magnetically.
@fredbloggs4829
2 жыл бұрын
Hi Alberto, that does make sense.
@DiThi
2 жыл бұрын
@@fredbloggs4829 Fun fact: The ROM of the AGC was sometimes called "LOL memory" because of the women (Little Old Ladies) sewing the bits into the cores. If you search the documentary "Computer for Apollo" you can see them doing the sewing (around the minute 20:30-20:45 depending on which version you watch).
@satadorus5924
2 жыл бұрын
It is the same principle as used in the Apollo ROM. You confuse it with the random access memory that can also use ferrite cores.
@BrekMartin
2 жыл бұрын
@@satadorus5924 no he hasn’t, he’s described core rope ROM, and somehow confused what he’s seen in this video. This device is using core rope ROM. The user weaves the memory.
@TheHandOfFear
2 жыл бұрын
Interesting tech. Thanks for the video.
@kyoudaiken
2 жыл бұрын
mike - just undo it legend.
@satadorus5924
2 жыл бұрын
Looks a lot like a Chess computer from the DDR I have. Same poor quality PCB. They use a kind of nice industrial type keyboard to enter moves. The bottom plate is a piece of hardboard like the rear of a radio set from the fifties.
@kepakpl
2 жыл бұрын
Those types of Chess computers were a masterpiece in comparation. Using magnetic-core memory in 1984 ... I think it would be more expensive in production than C64 at the other side of iron curtain (or the Telstar Call Control)
@TheKelikat
2 жыл бұрын
это плата самого лучшего качества. военные платы в лак окунали
@thelittlebigoneru
2 жыл бұрын
the PCB is above-standatd quality fo those time and those make. It looks rude, but works flawlessly.
@mjouwbuis
2 жыл бұрын
That poor quality PCB might even be glass fiber based, can't tell from the pictures for sure. In any case even if pertinax, its quality would have been on par or better with the cheap pertinax grade used in western consumer electronics.
@thelittlebigoneru
2 жыл бұрын
@@mjouwbuis no, it's usual fiberglass, like modern GR4. It was cheap and widespread in 1980's in USSR. And, THIS device is expensive office machine, with some requirements for realiability and robustness. Not consumer grade, for shure. Once I have programmed this thing myself, in my first year at university, 1987. I was deeply amazed by this rope magnetic memory solution and strange combination of components and technologies.
@Llamarama100
2 жыл бұрын
What a hideously complicated and backwards system. I absolutely love it!
@siliconjunkie7297
2 жыл бұрын
Great content as always, any chance of making the schematic available on-line?
@mikeselectricstuff
2 жыл бұрын
electricstuff.co.uk/trill2.pdf
@pasikavecpruhovany7777
2 жыл бұрын
I think for digit select they could have used just 2 wires per core. Have one wire pass through all the cores into the common emitters and selecting digit by passing the same current in opposite direction through that 4 rings.
@rymannphilippe
2 жыл бұрын
Funn, freaking, fantastic. Thanks for this pice of old and cool stuff.
@TheManLab7
2 жыл бұрын
You definitely need to give that to Sam, as he'll actually use it in his set up. He'll also get it to do some funky stuff as well 😜 I know you've already said it )(PAUL FLETCHER)(, but the way I see it. The more people that see it and the more that talk about it, the more chance it'll happen in my eyes 😉 Could you do it for the subscribers Mike? Because you know that every single person will absolutely love it! 😁👍🏻
@martincarlberg8308
2 жыл бұрын
That is really fascinating! 😀
@jo0ls
2 жыл бұрын
Omg. I can see dad giving that’s to the kids to sort out.
@petermuller608
2 жыл бұрын
Up to seven digits? Was this for company internal communication only?
@imevmt
2 жыл бұрын
In the USSR the phone numbers had 10 digits, but the first 3 to 6 digits were used for the area code and dialing these was optional for calls within the same geographical area. It still works like that for local landline calls in Russia outside of Moscow (there are three 3-digit area codes in Moscow). Seven digits were enough, because in Soviet times people almost never made intercity calls from their home or regular work phones even though technically it was possible.
@HappyBeezerStudios
7 ай бұрын
@@imevmt Not too different to even today's numbers. For example here in Germany area codes are between 3 and 5 digits (And all begin with a zero that is omitted for international calls) and the actual numbers given out are at maximum 11 digits since 2011, before that the usual length was between two and nine digits. So no issue to call local numbers with a maximum length of 7 digits. This auto dialer would've worked here during the late 80s/early 90s basically just as well as in the USSR. And the international E.164 standard limits international numbers (including country code) to a maximum of 15 digits. And until 1997 that limit was 12 digits.
@charlesallan6978
2 жыл бұрын
Useful for placing robocalls.
@T2D.SteveArcs
Жыл бұрын
😮 base to the case😮 sounds like this could couple much more interference in sensitive circuits , unless your running grounded base etc
@fryode
2 жыл бұрын
The Soviet Union was stranger than I thought.
@ganelonhb
2 жыл бұрын
Nah this was used in America too, just not consumer tech
@djalienprime
2 жыл бұрын
@@ganelonhb and 30 years before)))))))))))))))))))))))
@the123king
2 жыл бұрын
Not strange at all. In fact, it was quite common in the 60's and early 70's, before ROM chips were cheap. Neil Armstrong landed on the moon with a computer whose software was woven into something similar.
@fryode
2 жыл бұрын
@@the123king I meant it was weird as an 80s/90s technology. I'm pretty familiar with core and rope memory, but I thought it was left behind in the era of which you speak.
@alexanderk7671
2 жыл бұрын
A rare thing from a museum
@Gameboygenius
2 жыл бұрын
Maybe a museum that's (not) obsolete...
@BersekViking
2 жыл бұрын
Wow! That was surprising.
@jj74qformerlyjailbreak3
2 жыл бұрын
I need those cores. I’m really intrigued by Core Memory. I want to weave my own memory modules. It’s hard finding good quality examples of how core memory worked. Christian From “Play With Junk” Channel sent me a DIgital/Harris J11 Ceramics. By far my favorite CPU. Thanks for your time explaining this piece of nostalgia. God Bless.
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