I was a CE worked on 370 158 and 303x along with all the IO. Joined 1978 and worked on most IBM 360 and 1403

Totally feeling the engineer who couldn't accept this machine being scrapped and instead hauled it into his garage 😅👍

I worked for IBM for over 47 years. I worked on almost all main frame processors from ok 1400’s, 360’s, 370’s, 43xx, 30xx. It was a great career. Even AS400. And all peripherals.

I remember I had one of the manuals for this computer as a kid ... I treasured it so much even though I couldn't understand a single thing..... later when my dad bought mean IBM 5160, I kept the manual on the shelf next to the manuals for the XT.

My fist job out of high school was an operator of 370 mod 158 and a 360 mod 50 for a local bank. Thanks for sharing the video.

This was the last machine I ran as an operator that made you feel like you were actually doing something! I used to love doing IPLs just because we could turn knobs and push buttons! I changed jobs and the next datacenter had a 4331 with the 'Maytag' flat tape drives! I went fulltime into systems programming and we went through the whole 4300 family, through the 9672s and into the Zseries. They are still running the Z12 we had when I retired.

This brings back a lot of memories.  I might have actually worked on this machine.  I was the Quality Engineer for the 370/148 and the 370/138 built on the same line in Endicott NY.  Later went on  to design test equipment for the 4300 series, then the 9370.  Remember a few details about them. The 138 implemented the 370 instruction set using what was called vertical microcode.  It was similar to what an assembly code.  The 148 used horizontal microcode.  Each clock cycle it would apply a very long bit string to gates throughout the machine, causing different sections of logic to execute based on whether a specific bit in the microcode was on or off.   Really hard to write.

I had to chuckle at a flashback I had at your comment about the ubiquitous Emergency Pull knob. The second computer I ever worked on was a S360/30 at my small community college. The operator who trained me always had it unscrewed and just resting on top of the machine. I was told, in no uncertain terms, to never, ever, EVER pull that knob unless I saw flames over 3 feet high coming from the top of the unit. Fortunately, that day never came.  Enjoyed the video.

good to see an old 370. In the 1980s and 1990's I was a partner in leasing co and we had 40 360's and 370's on lease  in the nyc area.
We would custom paint the machine to customers order. IBM would do the same. Usually just cans of ibm spray paint. red, white, yellow, blue.
the front panel was always black.

When IBM took the lights off the front panel, they put light panels inside the machine. THE LIGHTS WERE ESSENTIAL TO FIX THE MACHINE USING
THE BLUE MAP BOOKS. TO FIX THAT MACHINE YOU NEED ALL THE BLUE BOOK(MAPS), DIAGNOSTICS AND FE REPAIR  MANUALS.

Great video! My father started with a System 360.. S/370... and new models.. I had my first contact with a computer when I was 12 years. I built some EXEC, EXEC2, Rexx, Assembler....  Since that moment, I work with mainframes. I never forget of these old models... :)

370/148 with 1MB memory (solid state! Woo-hoo!) could run the MTS (Michigan Terminal System), along with an IBM field upgrade for Data Address Translation (hardware) + virtual storage.  IBM guys in very spiffy, clean-pressed suits ("Field Engineers") would show up at the data center with these impressive aluminium briefcases with the hardware, etc., and do the upgrades.  Afterwards, a fully kitted 370/148 with 1MB could easily support up to 150 users on 3270 & 2741 terminals.

My first systems job was at a large corporation that had upgraded from a 148 running VM and VS1 to a 158, then upgraded that to MVS. The 158 came to that shop from another within the company with a massive 6 MB of RAM: 2 MB in the main machine, and 4 MB of RAM from some company nobody ever heard of by the name of Intel. Eventually, it had an AP (attached processor, a poor man's multiprocessor system) added; the main machine was blue, but the AP was yellow. The 158 didn't have anywhere near as many blinkenlights as the 148; the console was used for that kind of thing instead.

The one thing about our 370/145 was the incredible noise the MG made. I always thought we had one was so that we could run a machine destined for US voltage and frequency from UK's. It seems that this wasn't the case.

The 4341 we had (I was working for a different company by then) was nicknamed the freezer because that was exactly what it looked like - a large chest freezer.

Very cool. I've decided to return to the mainframe and then finish my career in a few years. I've spent the past few months getting back up to speed on OS/MVS on Hercules TK4. Now transitioning over to z/OS and zDTE.

It’s a 370 because it runs the 370 instruction set and can use 370 peripherals; doesn’t matter the internal implementation. If it had a chipmunk on a flywheel and ran 370, it would be a 370. All the 360s & 370s had micro-programmed CPUs except 360/44, 75, 91, 95, 195 & 370/195, which were hardwired.

The CPU in the slower models had a narrower data path (cheaper). That’s mostly what made them slower (and cheaper). But their micro-programming enabled them to process data in 32-bit registers. Very clever actually: a key to their success. It gave them instruction set compatibly over a 50 to 1 speed difference: just amazing. The micro-programmed models lined up like this:

CPU     360 model  370 model
8-bit       30/22         115/125
16-bit     40               135/138
32 bit     50               145/148 & 155/158 with cache memory
64 bit     65               165/168                

Nice find. I like the white color best of all – very tasteful. Our 145 had that gaudy yellow; screamed. "CAUTION!!" I thought is should be green = money. Don't buy a 168. It needs a water refrigeration system for cooling. What you got there will make a great (if large) Personal Computer.

I worked in an installation using the 370/135 operating system DOS in April-1977. Long ago and far away, in a prior life. Title: Programmer/Analyst.

Very cool. MST is an emitter-coupled logic, not TTL. Some of the console circuitry was TTL. IBM called it VTL - Vendor Transistor Logic - because they purchased most of it. MST-4 is kind of like 100K series ECL but centered around ground. VCC is +1.25V and VSS is -3.0V hence the emitter followers center around ground. Also interesting that IBM labeled bits from left to right instead of by their radix weight. A 24-bit address bus, for example, is labeled 1 thru 24 instead of 23 thru 0. Documentation got freaky when upgrading past 16MB. Fun stuff. Good luck with the start-up!

WE MISS THE LIGHTS !!!!!!!!!!!!!
In the 1980's we had white system 3(mom's machine), yellow sys3, blue 360/40,

black 370 135, 370 145 all in our service bureau running work for our customers.
In 1990 we lost our cheap rent and had to down size to dell servers, laptops
and pc's, we now run all the same work on dell pc's, servers and laptops.

I got to work on a 148 at Texas Instruments (LICC) in 1979.  We used it for around 6 weeks until our 4331 arrived.  We ran VM/370 and I was the LICC's first systems programmer.