Usagi Electric
Vacuum Tube Atari Punk Console
updated
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
Vacuum Tube Computer (Incomplete) Wiki
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
Other Music:
Artist: Red Tailed Fox
Title: Suco de Melancia
ocremix.org/remix/OCR01671
Thanks for watching!
Chapters
0:00 Introduction
2:58 CED and copying code
7:06 Compiling the emulator
10:48 First test drive
13:41 Putting the two side by side
15:20 Tubes vs CPL
19:35 Interesting discovery
22:33 Bunny!
List of PDP-11 Cards:
https://i.postimg.cc/4dThyhzy/AllCards.png
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
2:11 Removing and cleaning the cards and chassis
4:13 But wait, there’s more!
7:48 H9275/H9278 Backplanes
9:01 M9407 Grant Continuity and M9405/05 Extender
10:13 M3107 8-Line Async MUX
11:17 M7555 RQDX3 HDD/FDD Controller
12:31 M7513 RQDXE Extender
13:32 SRQD11-B HDD Controller
15:15 M7546 TK50 Tape Controller
16:10 Mystery Floppy Controllers
17:50 Bomem DEB1800L
18:51 Matrox QRGD-G and Bomem DEB4100L
21:21 M8637, DMA5400 and Q-RAM 44B Memory
22:52 M8190 and M8192 QBUS CPU
24:25 A mystery memory card
25:40 What am I going to do with 6 CPUs?
26:07 A portable PDP-11
27:10 A mega PDP-11
29:37 Bunny!
If you’re interested in coming to the local meetup, check this link:
meetup.com/dfw-retrocomputing/events/290672225
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 Introduction
2:09 Building the Power Supply Board
5:12 PSU Timing Problems
6:56 Finishing the Power Supply Board
7:53 Smoke Test Time!
10:28 Cooling and Cabling
12:37 Attempting to Repair the Memory Card
15:33 First Boot!
17:20 First Boot (Part 2)
18:57 Setting up the OS
26:43 Final Assembly
28:28 It Works!
31:46 Kitties!
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 Introduction
1:02 I have a problem (understatement of the year)
3:34 Build montage baby!
11:57 That turned out really well
12:39 What went wrong?
13:41 Looks familiar
14:44 What’s left to do?
16:24 Bunny!
Tube Computer Wiki:
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 Introduction
0:50 For the uninitiated
3:35 What are we missing for addressing control?
4:50 Let’s make some PCBs!
6:16 First power on test
7:50 First data storage test
11:23 Second data storage test
14:47 What’s next?
16:00 Kitties!
Happy holidays y’all! There are many different facets to the Centurion project that we’ve been working hard on, and one of those is cracking the code for… code. And, I think we’ve got it! Tag along as I walk through writing a program in CPL, Centurion Programming Language, and have all sorts of trouble with the built-in editor, compile errors, coding mistakes, etc. You know, the usual fair when programming anything!
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
All of the code used in this episode and the CPU6 Programmer's Manual are available at the links below:
github.com/Nakazoto/CenturionComputer/tree/main/Software/New%20Software
github.com/Nakazoto/CenturionComputer/wiki/CPU6-Programmer's-Manual
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
1:00 What is a Centurion?
5:08 Now a look at the software side
7:27 What kind of code are we going to write today?
8:33 Let’s spin the big boy up
10:24 Time to start coding
12:14 Necessary house keeping at beginning of code
13:47 Setting formats and declaring variables
15:38 Writing the entry into the program
16:28 Printing text on the CRT
17:28 Our main program loop
22:59 Printing the answer
24:06 Closing down the program and handing back control
25:18 Compile attempt #1
29:00 Compile attempt #2
30:10 Compile attempt #3
32:00 Compile attempt #4 (nailed it)
33:10 Why was it so slow?
33:56 What if you want to program something?
35:50 Bunny!
The Centurion has a new Minicomputer friend in the house – a PDP-11/83! This was a sweet deal I was put on to by a Patreon member, Jon, and it took a little doing to get it home, but it’s here and it’s awesome. Well, it would be awesome if it wasn’t so filthy, so let’s get to cleaning!
Absolutely check out my brother's shop, Lovett Sundries!
lovettsundries.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 Introduction
0:39 How did I get this thing?
4:34 What have we got here?
5:29 The front and storage
6:53 The back, power and RS-232
9:05 Disassembly
12:23 Cleaning
13:59 Chassis reassembly
15:00 Power distribution
17:16 Cracking the box open
18:42 What's up Lukas!
20:51 Testing the power distribution box
24:14 What’s next?
25:35 Merry Bunmas!
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 Welcome to an empty room
2:20 Let’s get building
5:01 Step into my office
6:03 The Centurion
8:19 The TI-99
10:00 The NEC PC-8001
12:22 The HP VTVMs
13:51 The tube computer
15:10 The pinball machines
16:15 The ADM-3A
16:37 The counterfeit Centurion
17:42 Moo!
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 Introduction
0:59 Hawk drive recap
1:35 Floppy drive recap
2:28 The Phoenix and Finch
4:12 Let’s test out the Finch (Disaster!)
5:22 Alright, what happened?
8:30 Let’s check the motor first
10:44 Let’s take another listen…
12:18 Okay, I think we gotta open it up
15:45 It’s better?
18:46 Will it crash?
19:25 Did we just dodge a bullet?
22:25 Kitty! (Our boy named Sue)
pcbway.com
We’re going back to an old one - the venerable vacuum tube 555 timer. This was a really fun project we took on a while back to try to make a 555 timer out of just vacuum tubes, and while the prototype made at home on the mill was excellent in every sense of the word, we were struggling coming up with a more professional looking version. Well, fear not, our sponsor PCBWay is here! PCBWay hooked me up with some pretty righteous PCBs, so let’s take a look at what they sent and see if we can get the new and improved 555 going.
Everything on the 555 timer is available here:
github.com/Nakazoto/ue555
Notably, here’s the link to the datasheet:
github.com/Nakazoto/ue555/blob/main/UE555_Datasheet_v0.1.pdf
And here’s the link to the gerber files:
github.com/Nakazoto/ue555/tree/main/Gerber%20Files
If you need tubes, I strongly suggest either 6AU6 or the 6CB6, both work brilliantly. Just search eBay or your local auction site for “6AU6 lot” or “6CB6 lot.”
The 7-pin sockets can be found on most online retailers like Amazon or AliExpress. Just search for “7 pin tube socket” and look for the ones that are PCB mount.
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 look back at the OG 555
1:28 The new hotness
2:30 A close look at the new PCBs
5:14 Let’s build it
7:50 A close look at the datasheet
9:10 Tuning the OpAmps
13:01 Testing: Schmitt Trigger
14:24 Testing: Astable oscillator
16:46 How do you get one?
18:53 What’s next? (The CSS555!)
21:49 Bunny!
Check out Rich’s blog here:
ricapar.net/wang-writer-5503
Everything on the Wangwriter will ultimately be available here:
github.com/Nakazoto/WangWriter5503/wiki
Colin hooked me up with the Wangwriter, so check out his Facebook page for rare vacuum tubes:
facebook.com/groups/2009005339280149
I also borrowed a bit of footage from VCF, check out their YT channel here:
youtube.com/@vcfederation
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 Story time
3:49 Let’s see that OS!
5:12 Getting the Archive Disk ready
8:04 Let’s start writing our script
17:08 Time to fix that printer
19:30 Let’s print out our script
22:23 I adore this machine!
24:00 The Lion Speech
25:39 Bunny!
Check out 256byteram’s code here:
github.com/256byteram/WangWriter
Everything on the Wangwriter will ultimately be available here:
github.com/Nakazoto/WangWriter5503/wiki
Check out Rich’s page on his Wangwriter here:
ricapar.net/wang-writer-5503
Colin hooked me up with the Wangwriter, so check out his Facebook page for rare vacuum tubes:
facebook.com/groups/2009005339280149
I also borrowed a bit of footage from Retrobits, check out there YT channel here:
youtube.com/@retrobitstv
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
2:22 Figuring out output and input
5:00 Checking the keyboard scancodes
6:29 Repairing the foam and foil keyboard
8:50 A closer look at the keyboard PCB
10:07 Checking the keyboard scancodes… again
11:28 Getting 256byteram’s program onto a floppy
14:41 CP what?!
16:03 Zork works! Job done, right? Right?
17:12 47k aint enough…
20:20 What’s the endgame here?
21:18 Bunny!
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 Introduction
1:00 Centurion Roadmap
4:14 Understanding the FFC microcode
6:20 What did we need to update?
9:15 Where is that one byte located at?
10:14 That fixed it, right? Right?
11:50 Let’s exercise that floppy!
14:26 Let’s properly format this disk for the Centurion!
16:26 A slight detour to understand Centurion “tracks”
17:58 Can we get the OS onto a floppy?
20:24 Let’s boot from the floppy!
21:47 Hooray! A largely useless OS!
24:03 Where is this really going to shine?
26:04 Bird?!
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
2:34 Let’s waddle over to the bench
3:21 You dolt, it’s written right there!
4:07 Let’s look at the ICs anyways
7:26 It feels like so much more
8:59 If you know let me know!
10:18 Bunny!
pcbway.com
Man oh man, this floppy drive. This floppy drive is kicking my butt six ways to Sunday! But, we aint no quitters and I’m gonna keep wading into battle with this thing until it submits. No matter how tough it gets, I just gotta channel my inner John Connor – we can’t let the machines win. In this episode we take another crack at diagnosing the FFC and the Floppy drive, and while we don’t emerge victorious just yet, we have made some pretty good progress!
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 Introduction
2:07 Where were we?
3:46 Some new tools!
7:53 Hooking the riser card up
10:02 Testing out the riser card
11:29 More new tools!!
12:45 Hooking up and using the Logic Analyzer
14:18 What is Microcode?
17:48 More probing o the FFC
18:45 Maybe the floppy is still giving us guff?
19:58 After three days of battle…
21:21 A new problem
25:05 Kitties!
Everything on the Wangwriter will ultimately be available here:
github.com/Nakazoto/WangWriter5503/wiki
Check out Rich’s page on his Wangwriter here:
ricapar.net/wang-writer-5503
Colin hooked me up with the Wangwriter, so check out his Facebook page for rare vacuum tubes:
facebook.com/groups/2009005339280149
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
1:57 Where did we leave off?
03:49 A sign of life!
05:15 Time to read the manual
08:23 Booting with an Archive Disk
10:45 Now what?
13:34 I want to see that print code
14:46 Setting up and using the GreaseWeazle
19:41 What did we find?
22:10 Hellorld!
25:14 Usagi!
Tube Computer Wiki:
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 Introduction
3:09 A refresher on our memory
4:13 How are we addressing one bit?
6:18 How are we addressing all bits?
7:34 Fanout rears its ugly head
10:06 A practical example
12:00 A wild cathode follower has appeared!
14:54 What can the 6CG7 do?
16:56 Time to build it!
18:23 Let’s give it a test
21:07 Super easy, barely an inconvenience
22:38 Lazy kitty!
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 Introduction
2:32 Where were we?
4:30 Let’s spin up that Hawk!
6:05 New diagnostics on Hawk
9:02 How can we protect the Hawk?
12:44 That should not have happened…
13:40 What went wrong?
16:00 Let’s copy that not so floppy!
19:00 That’s an interesting new error…
22:16 Editing the system configuration file
27:25 Outroduction
28:11 Fluffy boy!
Check out Colin’s Facebook page for more rare vacuum tubes:
facebook.com/groups/2009005339280149
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
2:15 So what did Colin have hiding out?
3:10 The worst Wang pun
4:52 A box of goodies
9:55 The monitor and keyboard
12:28 The printer and computer
17:45 The computer boards
22:15 The power supply
24:07 Let’s throw some electrons at it
28:03 Bunny!
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
Floppy Manual:
http://www.bitsavers.org/pdf/cdc/discs/floppy/77834769Y_Flexible_Disk_Drive_Description_May79.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 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
Restoration Music:
Artist: Ben Prunty
Title: Impulse
benpruntymusic.com
Thanks for watching!
Chapters
0:00 Introduction
1:01 Was it the power supply?
2:12 A few people nailed it
3:32 It works properly now
5:45 Where did I get it wrong?
7:47 Tidy up
9:42 Plugged in to the Centurion
13:52 Working on Drive B
16:18 What was wrong with Drive B?
20:46 Plugging Drive B into the Centurion
23:23 Kitty!
Watch Gerrit learn how to make tubes here:
youtube.com/channel/UCVebYrVZVDOzwlXZje_r6OQ
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
1:13 Size comparison
3:10 What is a neon lamp?
5:03 How do they work?
6:52 But what makes them really special?
8:33 Some applications for neons
9:27 A few examples to play with
12:54 Scoping the astable multivibrator
14:52 Enter the MTX90
15:58 What’s going on here?
18:50 It’s a thyratron!
19:45 Can the MTX90 multivibrate?
20:38 Scoping the oscillator
22:46 Bunny!
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
Floppy Manual:
http://www.bitsavers.org/pdf/cdc/discs/floppy/77834769Y_Flexible_Disk_Drive_Description_May79.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 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
1:41 Plugging it into the FFC
5:05 Testing with the FFC
6:28 Figuring out the pinout
10:00 Testing without the FFC
13:23 And it starts to go down hill
14:54 Testing the stepper and Drive B
18:14 And it all went wrong
19:09 Power reduction option
23:03 St-st-st-stutter
24:49 So what’s wrong?
28:22 Possible fixes?
30:11 Almost there
31:40 Wild bunny!
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 Introduction
1:22 What’s up with the Finch?
5:12 The floppies
7:55 Removing the drives
8:19 A closer look at the drives
10:00 Let’s clean these things up
12:54 The differences between them
15:41 New power supplies
19:43 Let’s flip the switch
21:38 A floppy drive needs floppies
22:38 That’s all folks
23:44 Bunny!
Alright, enough about the kitties, the 521A is so close to working perfectly, so let’s get to work and get it across the finish line in this one!
Part 1: youtu.be/RxWDU-G_gJs
Part 2: youtu.be/zItjyHcSrmY
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 and Twitter!
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Intro with kitties!
2:40 Where are we at?
5:30 Let’s get it fixed
8:27 Making sure all the neons illuminate
10:42 But, we’re out of adjustment
11:35 PSU adjustment
12:46 Phantastron frequency divider adjustment
14:20 Amplitude discriminator confirmation
16:16 Crystal time base adjustment
22:45 The trifecta of HP
25:43 Kitties!
If you want to support the channel please hop over to Patreon:
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Also, we now have some epic shirts for sale!
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Introduction
2:13 What is a rectifier?
4:10 What is a mercury vapor rectifier?
5:53 Let’s put some power into these things
10:26 Can we see the rectification?
13:00 Outro
13:45 Bunny!
Rinoa’s Auspicious Travails:
youtube.com/user/icc3a1800
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
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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 Introduction
2:10 Checking the TI-99s
3:39 Disassembly and troubleshooting
6:34 Cleaning and testing the new keyboard
9:24 Comparing the TI-99 against the Centurion
16:30 How are we going to test the RS232 sidecar?
18:20 Setting up the TI-99
19:42 Setting up the Centurion
22:01 Will it work?
23:50 What it took to make it work
26:10 Outro
26:52 Bunny!
As a side note, I've been a little under the weather lately, so this week's video is a little shorter than normal. Hoping to back into it full fledged by next week!
Check the full Centurion playlist here:
youtube.com/playlist?list=PLnw98JPyObn0wJFdbcRDP7LMz8Aw2T97V
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
Music in video from:
Artist: Ben Prunty
Album: Chromatic T-Rex
benpruntymusic.com
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Teardown
1:51 Rebuild
4:40 The Reveal
5:36 Bunny!
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 Introduction
1:09 Solving ATTN PRINT
4:08 The Fix
6:47 Parity Circuitry Inoperative
8:42 Show me that OS!
11:15 DIR
12:33 KOMPOZ
14:26 S_CRT
15:40 JCL
17:00 TESTS
18:05 TOS6
21:08 Getting back to the OS
22:24 What next?
22:57 Bunny!
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 Introduction
3:20 Repairing the Hawk Drive
6:20 Still not working, huh?
7:28 Using TOS to discover the heads are misaligned
13:34 DIY head alignment
16:52 Let’s try to boot it!
19:01 Alright, it didn’t boot, but we’re close
20:52 Bunny!
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
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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 Introduction
2:49 What is CCDP?
6:07 How will CCDP back data up?
8:27 Let’s copy that floppy!
12:34 What did we find?
15:46 The holy grail!
17:26 Let’s boot it! Or not?
20:01 Kitties!
For more detailed information on the Tube Computer and for the emulator itself, check out the wiki:
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
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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 Intro
1:52 The Emulator
7:07 Pitting the Emulator against the real hardware
13:47 The Assembler
17:20 The Wiki
18:37 Bunny!
If you want to support the channel please hop over to Patreon:
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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 What’s in a name?
2:22 What’re we building today?
3:26 Less talky, more buildy
5:56 Okay, that’s a little… big
8:46 Potential future designs
14:30 What do you think?
16:23 Kittens!
Centurion Wiki:
github.com/Nakazoto/BendixG20/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 Introduction
2:34 A little background
4:42 AND gate + OR gate
7:21 Emitter follower
8:42 Quad inverting amplifier
10:30 Flip flop
11:56 Full adder
16:10 Help, I need somebody, help, not just anybody
16:57 Gated CPA and DLO amplifier
17:42 Outro
18:15 Bunny!
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 Introduction
3:02 What did we get wrong on the Finch?
5:26 What is still wrong on the Finch?
8:00 The next steps with the Finch
9:36 A wild Hawk appeared!
12:28 Jean-Luc Picard’s wisdom
13:12 We’re no quitters though
16:36 Let’s fire this puppy up!
23:15 What’s up with the WIPL?
26:46 One final test of the WIPL
28:10 Where do we go from here?
30:48 Bunny!
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 Short Film
1:43 Addressing the previous video
5:31 The FFC Board
8:56 Baseline Testing
10:47 Testing the FFC Board
14:12 Sorting out the Finch
17:29 Genuine First Test
20:04 Welp, that didn’t work
23:54 Kitten!
If you want to support the channel please hop over to Patreon:
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Also, we now have some epic shirts for sale!
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 Intro
0:10 Unexpected ASMR
2:34 The real intro
4:15 The control word
5:23 Using a 6-bit address (with 2 bank bits)
7:00 The memory map
9:13 Actualizing it
13:22 Soldering it up
14:28 Testing all four bits
16:54 Outro
17:54 Bunny!
I found myself in an interesting situation where I needed to make a spreadsheet, so I pulled out the latest and greatest piece of spreadsheet software I had, Microsoft Multiplan, and got to work. Or, at least I tried to, but my TI-99 wasn’t having it, so before we can get to the spreadsheet, we gotta fix the old TI!
Disclaimer: I'm not very well versed in either the TI-99 or TI990, so everything mentioned here may be mildly or grossly incorrect!
If you want to support the channel please hop over to Patreon:
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Not… That…?
2:30 Intro
3:55 Disassembly
5:15 A Little History
10:07 Troubleshooting
15:03 Reassembly and Testing
16:22 Victory!
18:26 Kittens!
Centurion Wiki:
github.com/Nakazoto/CenturionComputer/wiki
Link to DJs Youtube:
youtube.com/channel/UC9mVXOoH49hQnkWHWeJfdcg
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 Chance Encounter
4:47 Corporate Espionage
10:40 The Cards
11:51 CPU6 (and the Wiki)
13:19 MEM
14:14 MUX
14:55 DSK1+DSK2
16:15 FFC
17:27 Finch Floppy Controller
19:31 Where do we go from here?
24:46 Bunny!
If you want to support the channel please hop over to Patreon:
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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 Intro
2:20 Firing the processor up again
4:23 The problem
5:22 IV-15 vs. 6977
7:03 What I got wrong (and how to fix it)
8:59 Testing on the breadboard
11:26 Making new boards
13:43 Giving the new VFDs a workout
15:10 Storing to our 1-bit memory module
17:09 Outro
18:20 Bunny!
All information on the Centurion can be found here:
github.com/Nakazoto/CenturionComputer
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
Dramatic Reenactment Music:
Artist: Ben Prunty
Title: The Train Robbery
www.benpruntymusic.com
Thanks for watching!
Chapters
0:00 Intro
2:14 Plugging the DIAG board in
4:48 I’m in! – A short film
5:20 The tests
6:23 How to read the displays
7:12 Test 01 – 03 (DMA, MEM, Interrupt Tests)
8:24 Test 04 – 06 (MUX Tests)
9:34 Test 07 – 09 (Hawk Tests)
9:58 Test 0B – 0C (Bootstrap and Self-Test)
10:40 Test 0D (Auxiliary Tests)
12:24 That’s as far as we can go, right?
13:47 Test 0A (Test Operating System TOS)
17:33 Hellorld! – A short film
18:32 Where do we go from here?
21:01 Custom TOS/Assembly only board
22:12 Custom floppy interface board
22:51 Getting online
23:35 Outro
24:12 Bunny!
All information on the Centurion can be found here (DANGER, WILL ROBINSON, there be a lot of SPOILERS on that github!):
github.com/Nakazoto/CenturionComputer
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 Intro and Thanks
1:10 The game plan
3:38 Getting the backplane out
6:24 Troubleshooting the terminal
10:36 Testing the terminal
12:14 Will it boot?
13:18 Nope, let’s look at the cable
18:54 Will it boot? (Round 2)
20:35 The bootstrap code
22:51 Outro
23:49 Bunny!
All information on the DIAG board can be found here (DANGER, WILL ROBINSON, there be a lot of SPOILERS on that github!):
github.com/Nakazoto/CenturionComputer/tree/main/Computer/Diag%20Board
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 Intro
2:05 Why are the ROMs important?
2:58 Let’s pull the data off them!
4:55 How do we know it’s good data though?
6:47 Tackling the problem from two directions
8:02 Sure wish I had a schematic…
10:53 Now, on to the software!
13:20 The MMIO
15:30 Outro
16:28 Bunny!
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
Music:
Artist: Ben Prunty
Title: Impulse
www.benpruntymusic.com
Ben, if you see this, thank you so much for the years and years of excellent music! You’re one of my personal music heroes and to have some of your music in one of my tiny little videos is absolutely mega. Thank you so much!
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Intro
1:08 What capacitors still need replacing?
2:55 Recap time
3:43 Let’s give it a test
5:05 We made it worse?
8:00 C204 the coupling capacitor
11:24 Our problems lie here
12:43 More repair
13:25 Testing again
16:18 Outro
16:39 Deers?!
If you want to support the channel please hop over to Patreon:
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 How do we start this video?
2:18 What is this thing?
3:18 But what does it do?
6:09 Ok, how does it do that?
7:26 Do you have the schematic?
14:33 Nice, but it’s lunch time, can you wrap it up?
15:08 What if I only clicked for the bunny?
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Intro
0:55 Recap
2:50 Mr. Romaine to the rescue!
4:17 The Computer
8:54 The Terminal
11:29 The Hawk Drive
13:15 The Phoenix Drive
16:07 The unfortunate end…
17:17 … or is it?
22:22 Bird!
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
Also, we now have some epic shirts for sale!
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Intro
0:58 Delay Line memory
2:17 Neon bulb fangirling
4:12 What are we doing today again?
5:08 VFD RAM
9:43 Thyratron Memory
14:49 Multivibrator Memory
18:56 6AU6 / 6977 Memory
22:52 The design to use
24:01 Bunny!
Here’s my previous episode on the HP AC4 Decade Counter:
youtu.be/WrBPVVKvWfE
If you want to support the channel please hop over to Patreon:
patreon.com/usagielectric
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Discord: discord.gg/p7UsfHD
Twitter: twitter.com/UsagiElectric
Music:
Artist: Ben Prunty
Title: Love Story
www.benpruntymusic.com
Ben, if you see this, thank you so much for the years and years of excellent music! You’re one of my personal music heroes and to have some of your music in one of my tiny little videos is absolutely mega. Thank you so much!
Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Thanks for watching!
Chapters
0:00 Intro
1:57 Cleaning, painting and recapping
4:27 What I didn’t replace yet
5:43 Theory of operation
8:20 Amplitude discriminator
10:23 Crystal controlled time-base
12:16 AC-4A decade counters
17:55 First start
19:31 There’s going to be a part 2 isn’t there?
21:05 Outro
21:58 Bunny!
Williams Tube Memory Information:
patentimages.storage.googleapis.com/a8/7c/92/cbb5b4b8248f46/US2951176.pdf
patentimages.storage.googleapis.com/11/03/6a/278c81aa1b3e0f/US2777971.pdf
http://ed-thelen.org/comp-hist/Claunch-Williams-2.pdf
Rotating Drum Memory Information:
http://www.bitsavers.org/pdf/ibm/650/22-6284-1_650_CE_Manual_of_Instruction.pdf
http://www.bitsavers.org/pdf/ibm/650/Andree_Programming_the_IBM_650_Magnetic_Drum_Computer_and_Data-Processing_Machine_1958.pdf
http://bitsavers.org/pdf/ibm/704/223-6818_704_CE_Manual/733_Drum_CE_Sep58.pdf
Core Memory Information:
http://bitsavers.org/pdf/ibm/704/223-6818_704_CE_Manual/737_Core_CE_Sep58.pdf
sites.google.com/site/wayneholder/one-bit-ferrite-core-memory
https://media.guap.ru/960/del_popolo.pdf
If you want to support the channel please hop over to Patreon:
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Music:
Artist: Shnabubula
Title: Chrono Trigger "Trigger, Please"
ocremix.org/remix/OCR02575
Thanks for watching!
Chapters
0:00 Intro
0:55 Refresher
2:53 Memory intro
4:14 Disclaimer (I’m making this stuff up as I go)
5:29 Williams Tube (Electrostatic) Memory
8:43 Rotating Drum Memory
11:48 Core Memory
18:23 Primary limitation
19:41 Outro
20:33 Bunnies!
Here’s the schematic: https://i.postimg.cc/fLcBGPXt/OTL-AMP-Full.png
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Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847
Music used:
Artist: Red Tailed Fox
Title: Suco de Melancia
ocremix.org/remix/OCR01671
Artist: Paper Coelacanth
Title: Amarant’s Night Ride
ocremix.org/remix/OCR04182
Artist: Sir_NutS
Title: An Open Galaxy
ocremix.org/remix/OCR03963
Artist: N-JekteD
Title: Purgatory
ocremix.org/remix/OCR01385
Thanks for watching!
Chapters
0:00 Intro
2:22 OG amplifier baseline
3:23 What we’re going to change
6:08 Did this fool really say “one two B four A”?
9:20 Breadboard testing
11:30 The new hotness!
14:01 Let’s give it a listen
17:00 How does it compare to the OG?
18:12 Outro
19:20 Bunny!
Usagi Motors: youtube.com/c/UsagiMotors
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
Music:
Artist: C7, Jamphibious
Title: Shadow's Lounge
ocremix.org/remix/OCR02710
Artist: Brink-of-Time
Title: Grav'iton's Dream
ocremix.org/remix/OCR04072
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
1:02 Intro
1:19 Mikuni rebuild
4:30 Test fire
5:03 Oil change and a wash
6:49 Test drive
8:28 A few words
9:47 Puppy!