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This makes it clear what is the origin of the term "console". How things have changed!

The voice sounds like it went through the same kind of encoding that TI used in the Speak & Spell

oh shit, I just got it. the bus is entirely asynchronous! I was confused as to how it keeps track of whose turn it is to control the bus and when, assuming there was some sort of clock, when in reality all it needs is these signals

Thank you! It helps a lot to study earlier UNIX.

Wish I had had this overview in 1977 when I started my Master's degree at Ohio State University. My project included wire-wrapping a Unibus interface card for the PDP-11/45 backplane, and writing a subroutine library for it in PDP-11 assembler, then testing it out using PDP-11 Fortran. It took me a while, reading those manuals, to comprehend backplane timing and understand the interface circuitry, but it all worked out in the end. Then, on to Bell Labs, for my first job out of school, learning Unix internals and C programming on PDP-11, VAX, and No.5 ESS hardware. Definitely established the course of my career since then! Thank you!

I own one of these

Amazing deep dive into the PDP-11

I found this video through Gopher. :) Thank you for uploading this.

I used to work on those... 285 cards per minute rate. The DEC model for just the reader was CRO4, a CR11 was the CR04 + cable + a "quad height" M8290 Unibus module . Older "CR11" bundles on a PDP11 got you a peripheral wire-wrapped backplane of multiple cards instead of the nice, single quad module.

Hi. I've obtained a full set of the workbooks that go along with these lectures. I'm planning on scanning them for posterity if you're interested

The best video that I’ve watched today

OMG! I am in in PDP heaven!

Cool! Looking forward to more updates

At "up to 2 mega words of main memory" I blurted out "What?" Wow that was so much memory!!!

@8:25 Unibus devices have voices similar to the Balok puppet in TOS? Fascinating! Loving these videos BTW!

Interesting

Oh man, this brings back memories...

hello i found this computer in my attic, is this worth something?

Hi All; PDP11nl, Please if You have them share the rest of what You have with us.. I am anxious for the next one in the series.. THANK YOU Marty

Great series - more, please!

Hi All; Where can I get the program that You are Running on this realcons emulator, that I could run on my Real PDP 11/45.. THANK YOU Marty

Hi ; Will There be more of these ?? I like what you have copied so far.. THANK YOU Marty

Haven't seen those lights since the 80's. I remember every Monday morning starting it up at the console - you'd have to enter some long octal address, press LOAD ADRS, confirm the correct lights were lit then press start - computers were more like science fiction back then.

This PDP 11/70 was the last DIGITAL computer to have lights. When idle the lights formed a pattern , was in some instances a type of circle left to right. When busy the light was a diagnostic of processer use so the would be more random

Coolest thing to see in a long time... Last time I seen something so old was when I was almost a kid, and local bank ditched some 20Mb drives with changeable plates (screw on type in protective bell). Need a 100 thumbs up button for video like this!!!

The following BLINKENLICHTEN sign was commonly seen in computer rooms and university physics labs... ACHTUNG! ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS! DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKSEN. IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS. ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN.

@unnaturaltragedy I think today's computers are too fast for lights. You would probably only get them all showing a constant blur. In the old days, you could roughly tell what a computer was doing by watching the light pattern on the front panel.

ahhhh drool.... computers with flashing lights. How I miss those flashing lights.

Cool. I think that the RSTS idle pattern had the lights moving left to right. As an tech, I used them to help me know when it was caught up in a loop or running slow.

Later on that panel was replaced by the 'RDC' remote diagnosis control... far less interesting. I have an old console left over from when I did an upgrade... long time ago - bet the stores man has me on a black list for not returning it!.

WHOW ! That's great to see an up and running DEC cardreader. As DEC employee 1977 I did "hate" this reader, primary the mechanical part. My compliment to have one reader still up and running. Super Video ...it's nostalgia.

As far as I know it has a fixed speed.

HOW TO SET +100 RATING?!?!!!!!

NIGHT RIDER

We had a PDP 11/70 when I started with my job but I have never seen those runnung lights. Ours was working with RSTS. I still use a PDP 11/73 to format old harddrives and I also have an 11/70 frontpanel which I'd like to convert into a binary clock.

It's the systems idle loop, when no other programs are active. I beliewe it is the RSX-11M idle loop

erectile

What kind of test is this? Something self programmed?