This video kicks off a series on troubleshooting vintage computers. In this first episode we start with an evaluation of the system, checking the basic subsystems needed to make a computer work and then drawing upon what we discover to find a direction for further troubleshooting.
This is a tentative list of topics for future videos in this series. Please have a look and let me know in the comments below if you have any questions and suggestions.
Description
In this ZoomFloppy follow-up video we learn to use the ZoomFloppy to allow us to connect VICE, the commodore emulator, to real Commodore hardware. We’ll cover the set up and usage of a 1541 floppy drive as well as a MPS-803 printer.
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Links
Zadig: http://zadig.akeo.ie/
ZoomFloppy Case: https://www.thingiverse.com/thing:2549678
ZoomFloppy Board: http://store.go4retro.com/zoomfloppy/
ZoomFloppy Info: http://www.go4retro.com/products/zoomfloppy/
OpenCBM: https://sourceforge.net/projects/opencbm/files/
Batch file for printing: http://www.soigeneris.com/document/soigeneris.com/VICE_ZOOM_PrintFromFile.zip
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https://www.youtube.com/watch?v=3XdbgJia6ck
A quick test of a newly printed Y-Axis, anti-backlash, gearset for the Alps printer mechanisms. I mentioned in the video that the fitment between two gears was too tight and prevented offsetting for the proper anti-backlash effect. Turns out it was operator error; I was trying to rotate the inner gear the wrong direction. Silly me.
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https://www.youtube.com/watch?v=71y6caQKUJ0
Video sponsor: PCBWay: $5 for 2 layer PCBs with 24hr turnaround at https://www.pcbway.com/
In thing video we take a look at two small cassette decks. One of them, A GE 3-5353B, was my dad’s and was part of a Christmas ornament that one of my sisters now have. The other is a Tandy CCR-82 which was made specifically for use for computer mass storage. We’ll see if we can get them both fixed up and the GE unit back to my sister in time for Christmas.
Belts used, links to my belt source is in links section below.
Radio Shack CCR-82
B1 - 208mm, 1mm square, SCY8.2
B2 - 132mm, 1mm square, SCY5.2
B3 - 89mm, 0.6mm square, SCY3.5
GE 3-5353B Mini Recorder
B1 - 145mm, 1mm square, SCY5.7
B2 - 117mm, 1mm square, SCY4.6
Timeline:
00:00 – Welcome
01:20 – Overview of our two decks
04:47 – GE teardown and cleanup
21:04 – Tandy teardown and cleanup
31:42 – How to measure and specify belts
34:46 – New belts for the GE
36:38 – New belts for Tandy
44:33 – Wrap up
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Links
PRB Belt Catalog: http://www.russellind.com/catalog.htm
Marvac (for belts): https://marvac.com/
Amazon Associated Links Tools:
Fiberglass pen: https://amzn.to/3pWRzIk
Fiberglass pen refills: https://amzn.to/3RgqGdQ
OWDEN Hollow punch set: https://amzn.to/3PXzTXW
Battery Spot Welder: https://amzn.to/3QMaG3T
Hotplate: https://amzn.to/3rxOtLU
Spudger set I use: https://amzn.to/3z19pM7
Heat mats: https://amzn.to/3boKDwl
Amazon Associated Links Chemicals:
303 Aerospace Protectant: https://amzn.to/3BxRa5Y
CiaKot: https://amzn.to/3CvVKiY
Overcaot Pen: https://amzn.to/3s439Bt
Novus Plastic Polish: https://amzn.to/2VwtFaV
Electronics / PCB cleaner: https://amzn.to/3ORx62D
Citric Acid: https://amzn.to/3krkgdt
Amazon Associated Links Parts / Supplies:
Foam sheet, 1mm: https://amzn.to/37CfTtt
Uxcell shrink wrap: https://amzn.to/3boKJEd
NiMh tabbed Sun-C: https://amzn.to/3nHCbxL
NiMh tabbed AA: https://amzn.to/3OMjBkW
uxCell strain reliefs: https://amzn.to/3nJ5AaP
3M Double sided tape: https://amzn.to/3rYCxBX
Noctua 80mm NF-A8 FLX fan: https://amzn.to/3ASVhsJ
Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien https://soundcloud.com/stevenobrien
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Music for Creators https://youtu.be/ujIMRIJ1JG8
...
https://www.youtube.com/watch?v=aqW6cF-4btI
Description
In the third part of this series on the ZoomFloppy we look at using NIBTOOLS to back up out copy protected disks.
Links
NIBTOOLS page: https://c64preservation.com/index.php/nibtools
NIBTOOLS GitHub: https://github.com/markusC64/nibtools/tree/markusC64-v637-branch
1541 Parallel conversion: http://ist.uwaterloo.ca/~schepers/1541par.html
Part 1: https://youtu.be/rdAzAIPkbf4
Part 2: https://youtu.be/3XdbgJia6ck
Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien https://soundcloud.com/stevenobrien
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Music for Creators https://youtu.be/ujIMRIJ1JG8
...
https://www.youtube.com/watch?v=mEv2vYH0ipw
Video sponsor: PCBWay: $5 for 2 layer PCBs with 24hr turnaround at https://www.pcbway.com/
In this episode we dig into the two Casio VX-4 ‘Pokecoms’ that we arrived from Japan in out last video. Both have had battery leakage one powered up with a missing row in the LCD. The other was dead to the world.
Part of the risk of buying ‘junk’ units from Japan is that they are truly junk and won’t be able to be repaired. It is still fun to dig into this Japanese market only units and see what makes them tick. Hopefully we’ll be able to fix them too. What horrors lurk beneath?
Timeline:
00:00 – Welcome
01:14 – Teardown on VX-4 #1
05:25 – Main PCB and battery box refurb
06:57 – Main PCB reassembly
08:30 – LCD and KB PCB evaluation
10:10– LCD PCB repair
12:15 – Reassembly of whole unit
13:04 – Can we polish plastic?
16:47 – Teardown on VX-4 #2
22:36 – Wrap up. Thanks!
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Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien https://soundcloud.com/stevenobrien
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Music for Creators https://youtu.be/ujIMRIJ1JG8
...
https://www.youtube.com/watch?v=wpbwxjeGzUI
Description
In this episode we refurbish a Wico Command Control joystick from the 1980’s. The housing is cleaned up, the centering bushing is replaced, and a new strain relief for the cord in installed.
Before closing it back up we cover how to adjust the switches and a tip for adding ‘shims’ to keep the centering bushing housing from wiggling in use. Links to the parts used are below.
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Links
Strain reliefs: https://www.amazon.com/gp/product/B01ERPCI08/ref=ppx_yo_dt_b_asin_title_o06__o00_s00?ie=UTF8&psc=1
Centering bushing for 3/8” shaft: http://www.arcadeshop.com/i/1061/robotron-joystick-centering-grommet.htm
PDF of refurb process: https://www.soigeneris.com/document/vintcom/Wico_Joystick_Refurb.pdf
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https://www.youtube.com/watch?v=gkFNflNm_w8
Teardown and repair of a vintage Phoenix CPS-10 C64 power supply. This is one of the aftermarket power supplies that was available for the C64 back-in-the-day. It is a fairly nice unit with a few rough edges; altogether a better supply than the Commodore Black Brick though.
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https://www.youtube.com/watch?v=C_hclBuH_UI
Video sponsor: PCBWay: $5 for 2 layer PCBs with 24hr turnaround at https://pcbway.com/g/m3hn11
In this video we take a look at a pair of slim sexy 70s digital multimeters by HP, the HP 3476A. These have been on the shelf for years. It is time to take them down. See what condition they are in and try to fix what is broken. Will we get lucky and get two testers ticking? Join us and find out.
Timeline:
00:00 – Welcome
01:25 – Initial evaluation and testing of both units
08:11 – Unit #1 Tear down and display doctoring
16:51 – Assembly and testing
26:56 – Unit #2 Big problem with a little meter
31:56 – Last desperate diagnostics
36:55 – Wrap up, thanks!
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HP Journal Vol. 28 No. 6, 1977: https://archive.org/details/Hewlett-Packard_Journal_Vol._28_No._6_1977-02_Hewlett-Packard
Links
Zadig: http://zadig.akeo.ie/
Amazon Associated Links Tools:
Fiberglass pen: https://amzn.to/3pWRzIk
Fiberglass pen refills: https://amzn.to/3RgqGdQ
OWDEN Hollow punch set: https://amzn.to/3PXzTXW
Battery Spot Welder: https://amzn.to/3QMaG3T
Hotplate: https://amzn.to/3rxOtLU
Spudger set I use: https://amzn.to/3z19pM7
Heat mats: https://amzn.to/3MXgSVG
Amazon Associated Links Chemicals:
303 Aerospace Protectant: https://amzn.to/3BxRa5Y
CiaKot: https://amzn.to/3CvVKiY
Overcaot Pen: https://amzn.to/3s439Bt
Novus Plastic Polish: https://amzn.to/2VwtFaV
Electronics / PCB cleaner: https://amzn.to/3ORx62D
Citric Acid: https://amzn.to/3krkgdt
Amazon Associated Links Parts / Supplies:
Foam sheet, 1mm: https://amzn.to/37CfTtt
Uxcell shrink wrap: https://amzn.to/3boKJEd
NiMh tabbed Sun-C: https://amzn.to/3nHCbxL
NiMh tabbed AA: https://amzn.to/3OMjBkW
uxCell strain reliefs: https://amzn.to/3nJ5AaP
3M Double sided tape: https://amzn.to/3p9odcG
Noctua 80mm NF-A8 FLX fan: https://amzn.to/3ASVhsJ
Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien https://soundcloud.com/stevenobrien
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Music for Creators https://youtu.be/ujIMRIJ1JG8
...
https://www.youtube.com/watch?v=tNAXrimLGTU
Video sponsor: PCBWay: $5 for 2 layer PCBs with 24hr turnaround at https://www.pcbway.com/
In this video we take a look at ‘DIGIs’, digital sound samples played back on the C64. In Part #1 we cover how to process sounds using Audacity, crunch them to the correct format with the homebrew program “Cruncher” and to generate the data required and the assembly code that plays them back via the C64’s SID chip.
We also take a look at the physics professor behind the digitized speech in games like Ghostbusters and Impossible Mission. How do they sound so good and take up so little memory?
In Part #2 we’ll go through the Cruncher program in more detail and find out how to use the compression options. We’ll also dive deeper into the DIGI player code for the C64 to see what makes it tick and what needs to be changed to allow it to play a compressed file.
Timeline:
00:00 - Intro
02:21 - Good vibrations
05:35 - SID has a bug
07:06 - Audacity
11:55 - Crucher
14:45 - CBM Prj Studio
19:57 - Forest S. Mozer
24:27 - Wrap up
Please consider clicking on the Subscribe button below and then click the bell icon. That way you will be notified when I post a new video. Thanks!
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Links
Audacity: https://www.audacityteam.org/
Cruncher and DIGI Player: https://github.com/Jeff-Birt/C64_DIGI
CBM prj Studio: http://www.ajordison.co.uk/
Mozer Compression: https://pineight.com/mw/?title=Mozer_compression
Mozer Interview: https://sceneworld.org/blog/2016/11/08/video-interview-with-forrest-s.-mozer/
Mozer patents: https://patents.google.com/patent/US4214125A
Mozer patents: https://patents.google.com/patent/US4384169A/
Mozer patents: https://patents.google.com/patent/US4384170A/
Mozer patents: https://patents.google.com/patent/US6021387A/
ESS: https://en.wikipedia.org/wiki/ESS_Technology
Credits
Speaker cut away view: By Svjo - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=30341185
Sound Loudness perception GIF: Rburtonresearch - Own work
Timbre perception: By Rburtonresearch - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=45074868
Pitch perception: By Rburtonresearch - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=45074869
Space pic: By !Original:NASAVector: Aaron Kaase, Medium69 - Structure of the magnetosphere numbered.svg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=65031109
Hubble photo: By NASA, ESA, S. Beckwith (STScI) and the HUDF Team - http://hubbl
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https://www.youtube.com/watch?v=fvgkAWwSceI