Usagi Electric
In-depth Look at the HP AC-4G Decade Counter
updated
Check out System Source here:
museum.syssrc.com
Come hang out with us at the LSSM on October 25th:
https://lssmuseum.square.site/product/haunted-hardware-fundraiser-ticket-patron-access/1
Check out Lloyd's Diode Tester Manual here:
github.com/Nakazoto/UEVTC/blob/main/Reference/The%20Bendix%20G15%20Diode%20Tester.pdf
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 What does 80 million yen buy you these days?
3:54 A problem of scale
7:16 A walkthrough of the tester
12:10 Calibration (if you can call it that)
13:57 Test drive time
16:56 Time to test 3,000+ diodes
18:51 This never happens, I swear!
21:50 Surely, I didn’t make it worse, right? Right?
23:40 Legitimately took me 5 hours to hunt down the fault…
26:53 Bunny is upset there’s no more banana
Kind of… It boots, and let me tell you, it was an absolute journey to get it to that point. But, it’s still not quite right. It’s trying to execute code, it’s just executing the wrong code. Still, with multiple bad germanium diodes and even a bad photodiode holding us up, it was an absolute battle to get to this point. But man alive was it worth it!
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who let me get my hands on a piece of history?
3:10 Cleaning the dirty motors
6:32 Giving them a test
7:10 Photodiode problems
9:26 Maybe it’s dirty potentiometers?
11:20 Nope. Okay, let’s learn how the phototape reader works
16:16 Bad photodiode. What next?
18:52 Did that fix it?
20:24 Not yet. Okay, let’s learn how the input system works
23:59 Troubleshooting montage!
32:46 Yoooo, that’s a booted machine!
35:22 Banana time!
Come hang out with us at the LSSM on October 25th:
https://lssmuseum.square.site/product/haunted-hardware-fundraiser-ticket-patron-access/1
Check out David Gesswein’s emulator here:
pdp8online.com/mfm/mfm.shtml
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 A day of housekeeping
3:15 How to use the Gesswein MFM emulator
8:46 Speedrunning time
11:20 Programmers make better lovers
16:03 The CDC Wren
19:01 The CDC Wren II
21:22 The Quantum RD52
25:39 The Seagate ST4097
28:04 A little bit of failure management
30:59 Turning a 10-minute job into a 2-day job
33:16 Baby bunny!
Check out John’s business here:
kadindustries.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 A wild John appears
4:13 Disassembly
6:03 We found the current loop!
6:26 Cleaning
8:29 A very sad dashpot
11:17 Back to cleaning
12:13 What even is a teletype though?
14:01 How to send
17:15 How to receive
21:29 Final assembly
22:14 An oil bath
23:28 Checking the RPM
25:20 First test
26:08 Victory!
27:45 But wait, there’s more!
30:38 An oil bath… again
31:23 It took a while, but we got there
34:20 A gift for John
36:40 Baby bunny!
Tube Computer Wiki (horribly out of date):
github.com/Nakazoto/UEVTC/wiki
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 This is a big version of this
2:02 What madness have I built?
6:33 What madness will I build today?
8:15 Aluminum fears me, as it should
16:18 What madness did I build?
20:22 What madness will I build next?
23:40 No madness, just fluffy bunny
Hi, Sick, I’m Dad.
No, literally, I’ve got some kind of upper respiratory thing going on and it’s no fun. I am coming out the other side of it, however, when you’re loopy and contagious, there are certain things you shouldn’t do, like invite people over or play with heavy machinery. So, today, we’re taking a bit of a break to take a look at an adorable little data terminal BoxcarJim donated!
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 “Get up, come on get down with the sickness”
3:14 “I’m adorable and I know it”
6:46 “Whatcha gon' do with all those ports, all those ports inside your trunk?”
7:57 “It’s getting’ hot in here, so take off all your… CRTs?”
8:48 “The Devil went down to Texas Instruments”
11:26 “What does the Quick Brown Fox say?” “’Hellorld!’ obviously.”
12:37 “No phone, No phone, I just want to be alone today”
16:29 “That’s why I say, ‘Hey man, nice terminal. What a good terminal man.’”
17:18 “Just like the fat orange cat, sings a song, sounds like he's singing”
For the curious:
Disturbed, LMFAO, Black Eyed Peas, Nelly, The Charlie Daniels Band, Ylvis, Cake, Filter, Stevie Nicks
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Solving the unsolvable
1:16 Solving the real halting problem
3:51 Taking care of the basics first
6:26 A little board swap and some progress!
8:40 Getting some help from the past
11:25 An introduction to PDP11GUI
14:22 Loading something from a simulated paper tape
18:02 The two avenues of media
21:28 Slow motion noms!
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 At this point, I still didn’t think I was wrong…
3:04 The man, the myth, the legend, Mr. Ken Romaine!
6:41 Start with the basics
9:30 Okay, let’s try putting data down again
11:59 A short interlude on why my program failed
13:50 Back to troubleshooting!
16:57 Success!
18:34 What went wrong?
20:04 Searching for a missing Sector Address line
25:09 That fixed it, right? Right?
26:42 Oof
28:11 Success again!
30:50 And introducing, special guest star, my underwear!
32:20 What happened to the mini Centurion?
37:09 We still got problems, naturally…
41:27 Nom nom nom
Tube Computer Wiki (horribly out of date):
github.com/Nakazoto/UEVTC/wiki
Paper tape ideas:
https://maker.pro/pic/projects/diy-punch-card-reader-using-pic-microntroller
http://www.decodesystems.com/ce-punched-readers.html
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 This is almost a computer
1:19 First things first
3:12 Where are we on this thing?
6:23 Just missing a paper tape reader
7:45 What is paper tape even?
9:10 How are we going to read paper tape?
10:27 Idea 1: Mechanical followers
12:21 We need to take a book out of everybody else’s page…
12:52 “Time to go mobile”
14:14 Idea 2: Optical but with big boy photodetectors
16:35 Idea 3: Nipkow disc?
17:32 Idea 4: 5mm photodiodes
19:26 This all seems way too complex, how did Bendix do it?
20:05 Idea 5: This is the one
21:49 Giving the concept a test
24:11 Ideas on how to demonstrate the machine
25:53 30 seconds of bunny noms
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who let me get my hands on a piece of history?
1:03 What stopped us last time?
2:30 Why didn’t I just jumper the SA line to -20V?
4:10 I can’t make sense of these mods, can you?
5:58 Where did my 0Va, 0Vb and -20V go?
8:48 A quick fix to get us up and going
10:17 Did that fix it?
12:40 Nope, try again!
14:56 Serious progress! But why isn’t it reading?
18:51 Let’s take one last swing at this
19:55 The paper tape reader is going to need some proper effort
22:22 Sunny kun!
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 This is my forever computer
3:40 Welcome to the CDC Hawk Drive
8:09 Let’s take this thing apart
9:30 Head crashes!
12:34 Head coils
14:09 Straddle erase and pre-erase, an introduction
16:29 Cleaning and rebuilding
19:51 Loading the heads and test drive
23:25 So, why can’t I use straddle erase heads?
28:55 Slow motion noms!
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
All other music from:
Artist: Ben Prunty
Album: Chromatic T-Rex
Thanks for watching!
Chapters
0:00 Time to Relax
0:35 Welcome to Japan!
1:29 Heavy metal at the Tokyo University of Science
2:42 The Bendix G-15
5:20 The Facom 201 (and some terrible audio)
7:56 The Univac 120
9:46 A small retro computer get-together
10:40 Sean’s Multi8
11:29 Curt’s TK85
12:29 Tom’s MSX
13:23 Sven’s custom adapter
14:06 Michelle’s NEC PC-9801
14:50 A little thrifting montage
19:29 My haul
22:05 Makidou Caves
22:40 Bihoku Circuit
24:27 Okayama Omurice
24:52 Kurashiki Bikan
25:38 Fukuyama Auto and Clock Museum
27:25 Matsuyama City
28:21 Oda Miyama Gorge
29:24 Nakatsu Gorge
30:13 Awajishima Monkey Center
31:28 Nara Park
33:07 Sunny kun!
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 This is the last intro I’ll film about a dead power supply
2:25 Could it be just a fuse?
4:53 Running down the wrong path
6:56 Finding the right path
12:00 Victory!
13:59 The cards
18:55 Trying to power it fully up
22:09 Life!
24:50 What’s next?
26:38 Ten chan!
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who let me get my hands on a piece of history?
1:24 Why has it been so long since the last episode?
3:15 A little bit of capacitor checking
5:48 Pushing the green button!
7:44 Hmm, that’s not great…
10:32 Pushing the green button again!
12:14 Why won’t it start up fully?
18:54 She wants to run though!
23:14 Baby bunny!
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Welcome to my excuse to play with spinning rust
2:39 How to troubleshoot without killing myself
5:32 Let the testing begin!
7:33 Things go horribly awry…
10:46 Fixing my own dumb mistakes
12:51 Okay, back to where we started
14:30 Wait, wait, wait, check the obvious stuff first
17:37 Hey, five out of six ain’t bad!
21:33 Baby bunny!
22:16 Helps if you plug it in…
Check out AJ’s work here:
youtube.com/@ForgottenMachines
youtube.com/@KnightRiderHistoriansOfficial
Check out VCF Southwest:
vcfsw.org
youtube.com/@VCFSW
For more on the prison laptops:
twitter.com/zephray_wenting/status/1761548861896606014
hackaday.com/2024/02/26/deep-dive-into-a-prison-laptop
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Introductions
1:05 The elephant in the room
3:20 What happened at AJ’s booth
11:58 What happened at Usagi’s booth
19:55 When to use emulation?
25:21 What about VCFSW 2025?
27:49 What is too new for a vintage festival?
33:05 Can an iPhone 1 be restored?
38:54 What’s coming up next on FM and UE?
41:14 The Usagi was not Forgotten!
41:57 The train left the station, and I wasn’t on it…
For more on the EDS PC:
youtu.be/Alsv-v9o4yQ
For more about David Gesswein's excellent emulator, check here:
pdp8online.com/mfm/mfm.shtml
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 How fast is too slow?
3:38 FM, MFM, RLL and the ever important… RLL?
10:48 Imaging an MFM drive (which is really RLL)
15:42 Imaging a not crap MFM drive (which is still actually RLL)
18:57 Imaging an RLL drive (which is… also RLL…)
23:00 Giving the RLL (not MFM) drive a shot
24:12 Giving the MFM (yes RLL) drive a shot
33:02 How fast is excellent?
36:24 Baby bunny!
37:15 Don’t anger the Youtube Gods…
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who needs responsibilities, let’s work on something fun
1:00 The who, what, where, why and when
3:51 Taking things apart
5:09 Even at first glance I can tell this PSU is gonna whip my butt
6:50 Initial testing
9:06 Fan cleaning and testing one more time
10:44 Okay, it’s broken, but how broken?
14:55 Hands on with the PSU modules
16:38 Swapping different modules in and testing again
21:39 Losing the battle, but still hoping to win the war
23:10 Another rescue?!
Music credit: Heartbound OST
store.steampowered.com/app/776560/Heartbound__OST
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
Come hang out with us at VCF Southwest:
vcfsw.org
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Schedules man
2:10 Cowabunga it is!
6:19 Will this collection of bad ideas work? (Nope)
8:25 Last chance
11:00 Success!
15:03 Life is tough when you’re dumb
19:09 Koma-san!
Check out AJ’s work here:
youtube.com/@ForgottenMachines
youtube.com/@KnightRiderHistoriansOfficial
Come hang out with us at VCF Southwest:
vcfsw.org
Check out CommodoreZ's photos here:
commodorez.com/photogal.html
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Introductions
1:50 AJ with Forgotten Machines
7:57 A talk about weird data
9:58 A question about floppy images
17:08 Floppy emulation is hard, yo
24:04 What are we bringing to VCFSW?
29:45 A special exhibit at VCFSW
32:47 Dragged kicking and screaming into the world of emulation
43:11 Outroductions
44:32 Apparently, the Usagi was literally forgotten…
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
Come hang out with us at VCF Southwest:
vcfsw.org
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 A funny story!
1:41 Alright, what’s broken now?
6:39 Swapping heads like it’s Frankenstein’s monster
9:25 Taking it for a test drive
12:10 Shady business practices striking 40 years later
15:33 Finally getting to the data terminal
16:59 Comparing the Regent 100 and Regent 200
19:38 It couldn’t have been easy, could it have?
22:17 Shifting gears and digging into the MUX card
24:45 Building and testing the daughter board
29:01 Hacky hardware solutions!
31:26 Koma!
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
Come hang out with us at VCF Southwest:
vcfsw.org
Check out John’s shop, Kad Industries, here:
kadindustries.com
Check out Butler Tech here:
butlertech.org
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Carry on my wayward son…
5:56 Power supply shenanigans
12:30 Head cleaning and disk inspection
15:08 Loading the heads and failing to boot
18:18 What went wrong?
20:37 Repairing the drive and aligning the heads
26:14 Test drive
28:08 The good, the bad and the ugly
31:20 ニャラリー
The BIOS has been uploaded here:
github.com/Nakazoto/CenturionComputer/blob/main/EDS%20PC/EDSPCBIOS19.BIN
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 This is not Doug Demuro
0:31 Brief history of Centurion
2:50 Why does the EDS PC even exist?
4:44 How did it get here?
11:11 Cleaning up the monitor
12:42 Does the monitor even work?
15:18 Let’s dig into the PC itself
17:51 A closer look at the motherboard and cards
25:27 Putting it back together and turning the switch
26:49 Let the troubleshooting nightmare begin
31:35 Will it boot?
32:56 I hate foam and foil keyboard with a passion
36:41 All clean and back together, will it get to DOS?
39:29 Plugging the Centurion into the Centurion
42:25 Kitties!
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
Check out John’s shop, Kad Industries, here:
kadindustries.com
Check out Butler Tech here:
butlertech.org
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Time for VCF Southwest!
1:33 Where did all this different hardware come from?
5:42 Woodworking
9:32 And now, the news!
10:38 Paintwork
12:21 Side panels
15:18 Getting them mounted
17:45 Yeah, that turned out alright!
20:27 We love you and miss you Chibita!
Check out more of Commodore Z's photography here:
commodorez.com/photogal.html
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
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my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 The video is so short, who needs chapters!
One event I’m always looking forward to is VCF East. Not just because it’s a stellar congregation of amazing people, but because there also happens to be one heck of a museum on campus as well. Let’s take a walk through the event, look at some of my favorite exhibits, and then hang out in the museum, and maybe even get hands on with one of their machines.
I had an absolute blast hanging out and learned a ton! Can’t wait until next year!
For more information on the museum, check out this link:
vcfed.org/museum-info
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 What is VCF East
1:05 The show
5:08 Usagi’s best in show
7:06 The Museum
9:50 Some of my favorite pieces
16:30 A wild PDP-8 appears!
22:42 Running a proper program on the straight 8
25:59 Bunny!
Here is the source code for CNake:
github.com/Nakazoto/CenturionComputer/blob/main/Software/New%20Software/Snake/cnake.asm
And here is the complete CPU6 instruction set:
github.com/Nakazoto/CenturionComputer/blob/main/Software/New%20Software/Bible/optest07.asm
github.com/Nakazoto/CenturionComputer/blob/main/Software/New%20Software/Bible/optest8f.asm
If you want to play around with the emulator, check it out here:
eciv.net/meisaka/cen/cen.html
If you want to know more about the Centurion, the wiki is full of just about everything we know:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon: patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from: Artist:
The Runaway Five Title:
The Shinra Shuffle ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 What did $50,000 get you back in the day?
1:47 Multi-user and…
2:41 … big storage!
4:31 But, can it play Doom? (No, not even a little)
5:35 Printing out the code listing
7:57 Ran when parked, right?
11:21 The code listing (this is a long one)
17:43 Let’s assemble the thing
20:19 Setting up the terminals
24:18 Multiplayer co-op gameplay!
27:38 Do copy that floppy!
31:08 Printing a label and making it look good
31:42 Vim and an Emulator!
33:20 Sunny-kun!
Check out this video on the Bellett:
youtu.be/qgrvf2xLrns?si=H0f3hI_GqBwDKJC8
And this video on the Honda Beat:
youtu.be/4S0Q_6VtY0A?si=8wxmhn5awi-cxk8n
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 I need a break
1:19 My first passion
3:57 A very special car
5:22 Carburetor work
10:42 Plug work and a wash
14:28 Let’s go for a drive!
19:12 Kono san!
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who let me get my hands on a piece of history?
1:25 The story so far
3:07 A normal typewriter you say?
4:15 5-bits is 5-bits is 5-bits
6:34 But wait, there’s more!
7:16 The Monty Hall problem, if it were switches instead of doors
8:53 Scrub-a-dub-dub
10:24 Madness lies that way
12:00 Alright, back to work you!
13:16 Can we make the platen move like it’s supposed to?
16:17 A little more scrubbing
17:33 “Hellorld!”
18:45 This thing is a marvel of mechanical engineering
21:19 VCF and the Open House
22:02 Sue and Mei
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
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my-store-11554688.creator-spring.com
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Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 I don’t have that many micros…
2:19 Where did this PC-8001 come from?
3:34 A quick look
4:54 Showa era is the best era
6:07 The motherboard
7:57 Japan’s bonkers power grid
10:19 Where that video hiding out at?
13:18 First proper power up
14:17 Let’s go for a test drive
20:22 Final thoughts and Project Euler
23:52 The cutest combo on the planet!
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Our goal of a portable PDP-11
2:22 Check the power rails first!
5:17 Did that fix it? (Hahaha, seriously?)
6:48 After a full day, where are we?
11:50 Trying to repair the bad FE/GT to compare to the good FE/GT
13:40 Okay, back to the original FE/GT…
16:03 That should have fixed (so why is there still 10 minutes left in the episode?)
16:44 The real smoking gun?
21:06 Still broken, but broken in a different way! Yay!
24:39 Cue battle music
VCF East: vcfed.org/events/vintage-computer-festival-east
VCF Southwest: vcfsw.org
System Source Museum: museum.syssrc.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 My fellow Usagis…
1:30 Where will I be in 2024?
5:38 What will be working on in 2024?
10:51 Merchandise and microphones
13:12 First lady Koma
Ken Shirriff’s article on the MC14500:
righto.com/2021/02/a-one-bit-processor-explained-reverse.html
Tube Computer Wiki:
github.com/Nakazoto/UEVTC/wiki
Logisim file mentioned:
github.com/Nakazoto/UEVTC/blob/main/Reference/Logisim/FullSystem_v1.circ
MC14500 Single Board Computer:
youtu.be/md_cPxVDqeM
How I cut my PCBs:
youtu.be/AB84_vbH_e8
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 The story so far…
4:06 A quick refresher
8:15 Hershey kisses of molten metal
10:46 Plugging in the easy stuff
11:40 Cathode follower buffers
15:25 Cathode follower buffers… again
17:42 Catho… I’m gonna stop you right there…
19:27 Blinkenlights!
21:50 Soft start
24:58 A massive milestone!
26:42 “My name is Sue! How do you do?! Now you gonna die!”
If you absolutely have to know what "GIRL82" is, have a quick gander here, you might find what you're looking for:
github.com/Nakazoto/CenturionComputer/blob/main/Software
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 What is a Data-100 printer?
2:36 Can’t touch this. Hammertime.
5:43 Plugging it in and setting it up
7:50 Test prints
9:39 Re-inking the ribbon
12:19 Cleaning up the rest of the printer
14:27 The infamous “GIRL82”
16:43 Curse you Red Baron!
20:00 Now that the printer is done, what’s next?
21:39 Baby bunnies!
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who let me get my hands on a piece of history?
3:27 Money, money, money
5:45 Disassembly
7:50 Preventative maintenance?
10:12 A look at the motor control section
12:01 A look at the optical reader
13:34 The elephant in the room (the punch)
18:44 First, a quick clean
20:15 Much ado about selenium
22:10 What’s next?
24:53 The babies!
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
The absolute best way to get in touch with me is through Discord:
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 It’s been… rough
2:41 Cleanup
3:47 First power up
5:36 Self testing
6:37 Trying to print from the Rainbow
7:57 Battling baud and data settings
9:25 Actually printing from the Rainbow
10:03 Some interesting quirks
13:47 Sue san!
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 This is our portable PDP-11
2:05 A portable PDP needs a portable data terminal
3:45 A virtual walkaround
6:52 Disassembly
9:53 Guess what, more poop!
11:53 Cleanup
14:54 Testing the power supply
16:51 “Everyone knows you never go full send!”
19:15 Properly checking voltages this time
21:14 “I’mma let you finish, but Tool had the best album of all time!”
22:29 The “parts” machine
24:06 Testing goes better this time
26:45 We’re close, but not quite there yet
29:14 Koma-san!
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Revisiting the power supply and voltage levels
2:39 The plan
3:42 Taking it apart so we can actually clean the thing
5:18 Wait, what even is a chain printer?
8:24 Actually cleaning the thing
10:05 First test
12:19 Second test (actually the third, I put the ribbon on wrong twice)
13:16 Okay, what happened?
15:17 Hammers and plastics
18:17 Third test (actually way higher than that, but you know, narrative coherence and all that)
18:52 Did we snatch victory out of the jaws of defeat?
23:04 Sue!
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 I love this blue monolith of a computer!
2:54 Removing the door fans
5:15 Reviving the door fans
9:24 Removing the main blower fan
12:10 Reviving the main blower fan
14:29 Removing the drum
16:41 Fixing the drum with a hammer
18:23 Flipping the big switch one more time
20:20 All it took was a little patience!
22:31 Kitty!
Check out Gunkies.org for awesome PDP information:
gunkies.org/wiki/PDP-11
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
The absolute best way to get in touch with me is through Discord at the link below:
discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 It’s cold y’all
2:29 Revisiting the regulator design
7:00 The negative voltage
8:56 Working on the -15V rail
11:34 A tale of two diodes
14:13 Come on man, you can do this
16:45 Nice, the PSU works. Now what?
19:46 Legen- wait for it -dary
21:38 Let’s get it to misbehave a bit
24:26 Time for a lot of y’all to click away
26:00 If you clicked away, you missed out on this
27:05 Sunny-kun!
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 My PDP/DEC Story
3:54 What problem am I trying to solve here?
5:07 The PDP-11/23 CPU and Memory cards
6:39 The PDP-11/03 AA Backplane and PSU
8:22 Let’s clean this thing up first
11:17 First test
14:05 Second test
14:42 Nothing is ever easy…
17:30 Third test
18:29 Why is this going so poorly for us?
24:07 Fourth test
26:05 “I’m calling it, time of death, probably 30 years ago.”
29:22 Puppycat!
Oh, and Happy New Year all!
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 The story so far…
2:12 What’re we missing?
3:43 Initial disassembly
5:18 A close look at the electronics
7:17 Getting the power supply free from its cage
9:09 A brief look at the power supply
11:27 Reviving the capacitors
14:05 First electron test in probably 30 years!
15:56 That went swimmingly!
18:57 Bunny!
You can find the brochure here:
archive.org/details/TNM_Data_620-I_computer_-_Data_Machines_Decision__20180115_0061/mode/2up
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
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my-store-11554688.creator-spring.com
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Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Welcome Mr. 620!
1:55 Stripping and repainting
4:47 Reassembly
8:04 Rearranging the room
9:14 Looking dapper
11:08 A dive through the brochure
17:40 Memory Power Supply
19:18 I/O Control
21:10 Core Memory
23:31 Front Panel
25:54 Central Processor
28:54 Hellorld NASA-kun!
32:51 Happy Fuzzy New Year!
Check out System Source here:
museum.syssrc.com
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord!
Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Who let me get my hands on a G15?
1:53 What are we doing today Brain?
3:36 How do we even power this thing?
4:51 Okay, what happens when we flip the switch?
8:07 What good does that do us?
10:05 And how do we confirm that the clock and timing tracks are good?
12:40 Enough questions, do the thing!
15:20 That… wasn’t a great sound
16:17 Do the thing again!
18:30 Confirm those tracks!
21:20 Heck yeah! What’s next?
25:56 Merry Furball Christmas!
For more information on VCF, check out there website here:
vcfed.org
Be sure to check out their forums too:
forum.vcfed.org/index.php
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 A VCF hoodie
1:59 What are we looking at today?
4:28 A quick test before disassembly
5:39 Ripping it all apart
9:11 Cleaning and painting
13:57 Good googly moogly, that’s a pretty terminal
15:34 Testing it hooked up to a computer
18:14 Still a little left to do, but overall, a massive success!
20:25 Sunny-kun!
Ken Shirriff’s article on the MC14500:
righto.com/2021/02/a-one-bit-processor-explained-reverse.html
Tube Computer Wiki:
github.com/Nakazoto/UEVTC/wiki
MC14500 Single Board Computer:
youtu.be/md_cPxVDqeM
How I cut my PCBs:
youtu.be/AB84_vbH_e8
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Introduction
0:45 Thank you so much Patrons!
2:58 A 1-bit computer with 2-bytes of memory
6:15 The scratch register
9:07 The output register
12:10 Let’s build that PCB!
14:02 Testing
15:05 That’s not good…
16:36 Let’s try this again!
20:06 Excellent! What’s next?
22:38 She climbed into that spot herself…
Check out PCBWay:
pcbway.com
Check this link for all the design files:
github.com/Nakazoto/UE-0.1/tree/main
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
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my-store-11554688.creator-spring.com
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Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Hello and welcome back
1:21 Why is the UE-1 so weird?
3:56 A crash course in the UE-1
5:28 What if we simply it as much as possible?
8:48 Logic diagram into PCB
10:38 First power on
13:16 That didn’t go well
14:20 Let’s take this thing for a test drive
17:02 How hard can it be to add 1+1?
20:04 Well, there we have it
21:51 Bunny!
For more information on Vintage Geek, check out the website here:
vintagegeek.com
And their Youtube Channel here:
youtube.com/c/vintagegeek
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
Come join us on Discord and Twitter!
Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Where we are and where we’re going
2:00 The Vintage Geek Finch
4:28 Finding the short
6:50 Wiring in power
8:09 Making room for the new data
11.36 Preparing the OS
13:14 She’s very much so not healthy
16:04 Let’s try to load the heads
18:33 Swapping PCBs
21:10 Welcome to troubleshooting purgatory
23:38 Victory?
26:43 Hah, there’s no victories here!
27:44 Down but not out
31:01 Victory! (For real this time!)
33:23 Let’s take a second, and wrap our heads around what just went down
36:45 Sue!
For more information on the Rainbow pinout, check out these links:
larosse.net/pc100/VR241.html
larosse.net/pc100/dec100-vr201-cable.html
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
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my-store-11554688.creator-spring.com
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Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Hello and welcome back…
2:09 John the legend!
3:46 Disassembly
5:57 A close look at the hardware
8:21 Cleaning time
9:34 Time to make a new cable
11:42 Round 1, fight!
12:55 Round 2, maybe don’t fight as hard as round 1…
15:36 Clean that floppy drive
16:40 Round 3
21:24 I got a question for y’all about PDP-11s!
24:43 Sunny-kun!
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
my-store-11554688.creator-spring.com
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Discord: discord.gg/p7UsfHD
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 A bit of reorganization
2:34 Scopes!
4:43 Testing the test equipment
5:40 Throwing electrons at the 120B
7:25 Deep cleaning time
12:43 6U8 vs. 6GH8
14:05 Testing after cleaning
15:21 So close, let’s dig in deeper and find out what’s wrong
17:38 Thor: “Is it though?”
19:35 I fought the HP and the HP won…
21:56 Battling someone else’s modifications
24:11 Please work correctly, for my sanity’s sake
25:48 Nailed it!
26:48 What am I going to do with another oscilloscope?
28:46 Derpy cat is derpy