Uploaded September 2023 | Updated September 2026, 3 weeks ago
Prepare yourself for an epic installment in the illegal Apple II+ clone repair series! Get yourself some popcorn and strap yourself in for a wild ride. This machine isn't going down without a fight! But hey, that's all just part of the fun, right?
Part 0: youtu.be/31WAE83FPoE (SMMC video featuring this computer)
Part 1: youtu.be/vYMiSz-WlEY
Part 2: This part!
Part 3: youtu.be/xv6B8BFDMck
-- Info
ROMs in this machine:
F8 Apple II
F0 Franklin Ace 1000
E8 Franklin Ace 1000
E0 ? 300865CC
D8 Apple II J-Plus
D0 Apple II J-Plus
-- Links
Frank's Channel:
youtube.com/c/iz8dwf/videos
First 6502 (missing ROR instruction) video:
youtube.com/watch?v=ewtRCdwbTEw
Github for ROR test:
github.com/misterblack1/6502_ror_bug_test
Our Apple II "Dead Test" diagnostic ROM:
github.com/misterblack1/appleII_deadtest/tree/main
Copy of the E0 ROM, scan of schematics and photos of the clone PCB:
archive.org/details/apple-ii-clone-pcb-bare-overlay
News report on these illegal clone computers:
youtube.com/watch?v=RFjGq55BglM
Adrian's Digital Basement Merch store:
my-store-c82bd2-2.creator-spring.com
Adrian's Digital Basement ][ (Second Channel)
youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
patreon.com/adriansdigitalbasement
-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
rigolna.com/products/digital-oscilloscopes/1000z
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
amzn.to/2K36dJ5
ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
eevblog.com/product/121gw
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
amzn.to/3b8LOhG
harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
retrotink.com
Plato (Clone) Side Cutters: (order five)
ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
commodorecomputerclub.com
--- Instructional videos
My video on damage-free chip removal:
youtube.com/watch?v=XQVjwPsVFd8
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
Prepare yourself for an epic installment in the illegal Apple II+ clone repair series! Get yourself some popcorn and strap yourself in for a wild ride. This machine isn't going down without a fight! But hey, that's all just part of the fun, right?
Part 0: youtu.be/31WAE83FPoE (SMMC video featuring this computer)
Part 1: youtu.be/vYMiSz-WlEY
Part 2: This part!
Part 3: youtu.be/xv6B8BFDMck
-- Info
ROMs in this machine:
F8 Apple II
F0 Franklin Ace 1000
E8 Franklin Ace 1000
E0 ? 300865CC
D8 Apple II J-Plus
D0 Apple II J-Plus
-- Links
Frank's Channel:
youtube.com/c/iz8dwf/videos
First 6502 (missing ROR instruction) video:
youtube.com/watch?v=ewtRCdwbTEw
Github for ROR test:
github.com/misterblack1/6502_ror_bug_test
Our Apple II "Dead Test" diagnostic ROM:
github.com/misterblack1/appleII_deadtest/tree/main
Copy of the E0 ROM, scan of schematics and photos of the clone PCB:
archive.org/details/apple-ii-clone-pcb-bare-overlay
News report on these illegal clone computers:
youtube.com/watch?v=RFjGq55BglM
Adrian's Digital Basement Merch store:
my-store-c82bd2-2.creator-spring.com
Adrian's Digital Basement ][ (Second Channel)
youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
patreon.com/adriansdigitalbasement
-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
rigolna.com/products/digital-oscilloscopes/1000z
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
amzn.to/2K36dJ5
ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
eevblog.com/product/121gw
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
amzn.to/3b8LOhG
harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
retrotink.com
Plato (Clone) Side Cutters: (order five)
ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
commodorecomputerclub.com
--- Instructional videos
My video on damage-free chip removal:
youtube.com/watch?v=XQVjwPsVFd8
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
![The self healing Amiga 500
This broken Amiga 500 seemed to fix itself while I was trying to work on it. Ive had this happen a few times in the past, but it baffles me every time.
Thanks to viewer Sean for donating this machine to the channel.
Video Links
Amiga Diagnostic ROM
SMMC 0049
Adrians Digital Basement Merch store:
https://my-store-c82bd2-2.creator-spring.com/
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
https://www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Links
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
https://www.commodorecomputerclub.com/
Instructional videos
My video on damage-free chip removal:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino The self healing Amiga 500](https://i.ytimg.com/vi/FFHWywp46f4/mqdefault.jpg)

![Is the ZX81 / Timex Sinclair 1000 actually bad? Lets fix these to find out.
People make fun of the ZX81/Time Sinclair 1000. It was a super cheap computer which had some questionable corners cut. Lets see if these three machines work, fix them if they dont and then see if these computers are worthy of praise or live up to their bad expectations.
0:00 What is the ZX81?
10:05 Testing and repair
44:36 Composite mod
53:46 Lets play some games
1:04:33 Final issue and conclusion
Links
ZX81 Wikipedia:
https://en.wikipedia.org/wiki/ZX81
Schematics:
https://www.retroisle.com/sinclair/zx81/Technical/Hardware/ZX81-Schematics.php
https://www.researchgate.net/profile/Edoardo-Dotto-2/publication/352756710/figure/fig10/AS:1038793201164290@1624679007435/Electrical-diagram-of-the-Sinclair-ZX81-detail.ppm
Composite Mod:
https://blog.codesurfer.dev/zx81-timex-sinclair-1000-composite-video-mod/
https://github.com/redhawk668/ZX81-Composite
Oregonian Issue: (With pricing)
https://archive.org/details/computer-83-special-section-the-oregonian-june-16-1983/page/n1/mode/2up
Keyboard membrane:
https://zxrenew.co.uk/Sinclair-ZX81-Membrane-p102352920
ULA Replacement:
https://www.tindie.com/products/charlieingley/vla81-zx81-ula-replacement/
Adrians Digital Basement Merch store:
https://my-store-c82bd2-2.creator-spring.com/
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM Programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (Order Five)
https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
https://www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Instructional videos
My video on chip removal without damage:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino Is the ZX81 / Timex Sinclair 1000 actually bad? Lets fix these to find out.](https://i.ytimg.com/vi/HBuBjCfsbUE/mqdefault.jpg)
![The 80s computer youve never heard of: The NABU PC
The year was 1982 when an innovative and new subscription based computer was released to the general public in Ottawa Canada: The NABU Personal Computer.
Powerful and advanced, it ran entirely off an operating system and software delivered by a 6mbit cable TV connection.
Youve probably never heard of it because it was not a commercial success, but lets take a look at the hardware and technical documentation about what makes up this failed computer.
0:00 Intro
3:01 Looking at the outside and inside
9:45 Power Supply
11:15 Keyboard
15:12 Power up test
17:18 The NABU Network and technical information
30:17 Conclusion and outro
Video Links
NABU PC eBay listing: (available as of Nov 20 2022)
https://www.ebay.com/itm/394319978146 (original listing. The seller seems to be releasing them in batches now, so try back later and check for relistings)
Some videos from Leo Binkowski, a software developer for NABU back when the company was operating. News report:
https://youtu.be/yKV-nH3rLHE
Inside a NABU development machine:
https://www.youtube.com/watch?v=QlpZFAX4MZo
NABU PC Users Guide: (Color scan)
https://archive.org/details/nabu-personal-computer-users-guide
NABU Technical Manual and Schematics:
https://archive.org/details/nabu-computer-technical-manual-by-mjp
More information from the seller of the NABU: (including untested flash device for it, pics and more.)
https://pellmill.com/NABU/Code-HTML/Index.html
Some additional history behind the NABU: (from someones whos family was heavily involved)
https://www.youtube.com/watch?v=FFaWJu3hDP4
NABU Network (Wikipedia)
https://en.wikipedia.org/wiki/NABU_Network
NABU PC and other information:
http://dunfield.classiccmp.org/nabu/index.htm
York University NABU Reconstruction Project:
https://museum.eecs.yorku.ca/nabu
Adrians Digital Basement Merch store:
https://my-store-c82bd2-2.creator-spring.com/
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
https://www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Links
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
https://www.commodorecomputerclub.com/
Instructional videos
My video on damage-free chip removal:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino The 80s computer youve never heard of: The NABU PC](https://i.ytimg.com/vi/HLYjZoShjy0/mqdefault.jpg)
![Apple Lisa Part 6: Magic smoke released while fixing the Lisa
Part 6: It is time to see if the Lisa can boot into an operating system and run anything beyond whats contained in the boot ROM. First I have to solve the Error 57 floppy controller error so we can try to boot the system.
Apple Lisa Playlist: https://www.youtube.com/playlist?list=PL4tFqFVNf5LQ-OE8JGNMJQoVOmgkyTorC
Part 1: https://youtu.be/77El1RmSY0Q
Part 2: https://youtu.be/zZ84-9zjmYY
Part 3: https://youtu.be/I6Mp-OVm92U
Part 4: https://youtu.be/zSlv7GZdFUg
Part 5: https://youtu.be/ohLDLJR-4-o
Part 6: This part!
Part 7: https://youtu.be/Vwr8A6k9cNM
0:00 Intro
2:05 Preparing to assemble the Lisa system module
7:44 Assembled system module
12:14 Running diagnostics
13:47 Testing and repairing the CRT driver
27:33 Troubleshooting the Floppy Drive Controller
42:34 Quick speaker test
43:21 Back to FDC issues
45:38 Testing the Barn Find Lisa CPU board
47:40 Fixing the slow power-on/reset problem
50:51 Fixing the Floppy Drive Controller error
1:10:48 Inspecting and modifying the LITE adapter
1:16:40 Lisa first boot!
Lisa RGB2HDMI profile: (You must be using the analog comparator board)
sampling=2,2,2,2,2,2,2,0,1,0,8,0,0,0,0,1,1,1,1,0,70,256,256,256,256,35,256,256
geometry=80,7,720,364,728,364,2,3,0,1,20374338,896,5000,379,4,0,0
palette=Mono_(2_level)
scanline_level=0
Links
Lisa ROM versions:
https://lisafaq.sunder.net/lisafaq-hw-rom_versions.html
FDC diagnostic process:
https://lisalist2.com/index.php?topic=431.0
Running a 2/10 IO board on a Lisa 2/5: (LITE adapter modification)
https://lisafaq.sunder.net/lisafaq-hw-io_substitution.html
Apple Lisa keyboard adapter:
https://www.tindie.com/stores/arcanebyte/
Alexs Github with replacement Lisa PCBs:
https://github.com/alexthecat123/Lisa-PCBs
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Instructional videos
My video on chip removal without damage:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino Apple Lisa Part 6: Magic smoke released while fixing the Lisa](https://i.ytimg.com/vi/HMEDMvb4IjM/mqdefault.jpg)
![Fixing a couple C64s like its 2019
Its time for a Retro Adrians Digital Basement episode where troubleshoot and repair a couple Commodore 64 machines. For me working on them is heartwarming and comfortable and always is so fun. Like riding a bicycle.
0:00 Intro
1:00 Machine #1
33:18 Machine #2
Links
RF Modulator Video Fix:
https://youtu.be/vTn36UaUfrk?t=1204
C64 schematics:
https://www.zimmers.net/anonftp/pub/cbm/schematics/computers/c64/index.html
https://myoldcomputer.nl/
GAL-PLA:
https://www.freepascal.org/~daniel/c64pla/
SIDKick:
https://github.com/frntc/SIDKick-pico
Mark @ The Retro Channel:
https://www.youtube.com/@TheRetroChannel
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Instructional videos
My video on chip removal without damage:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino Fixing a couple C64s like its 2019](https://i.ytimg.com/vi/H_zjmUDqJp0/mqdefault.jpg)

![Atari 800XL repair: Black screen at power up
On the bench we have a broken Atari 800XL exhibiting a black screen when powered on. Ive never done any Atari circuit repairs before, so lets see if I can fix this machine.
Links
Testing three Atari computers:
https://www.youtube.com/watch?v=MIJ_CcdIBJk
800XL Schematics:
https://ezcontents.org/sites/default/files/downloads/Atari800XL_schematics_rev2.pdf
Atari video connector pinout:
https://dfarq.homeip.net/wp-content/uploads/2020/07/atari-800-video-cable.png
Adrians Digital Basement Merch store:
https://my-store-c82bd2-2.creator-spring.com/
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
https://www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Links
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group
https://www.commodorecomputerclub.com/
Instructional videos
My video on damage-free chip removal:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino Atari 800XL repair: Black screen at power up](https://i.ytimg.com/vi/HjOLAOrSY9M/mqdefault.jpg)
![DEC VT100 test and diagnosis
The DEC VT100 is the quintessential terminal for all ages, likely one of the most emulated terminals ever. Lets see whats going on with this poor neglected specimen and see if I can get it working.
Part 1: This part!
Part 2: https://youtu.be/A3Ug302U5uc
Links
More reading on the VT100:
https://en.wikipedia.org/wiki/VT100
https://bitsavers.org/pdf/dec/terminal/vt100/
Adrians Digital Basement Merch store:
https://my-store-c82bd2-2.creator-spring.com/
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM Programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (Order Five)
https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
https://www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Instructional videos
My video on chip removal without damage:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino DEC VT100 test and diagnosis](https://i.ytimg.com/vi/Hz0kNKTiM-4/mqdefault.jpg)
![Apple Lisa Part 3: Im looking for a good CRT for th Lisa
Its time to revisit the battery damaged Apple Lisa from a couple weeks ago. I had a chance to test a couple of my boards in a working Lisa so I could rule out potential issues with these two boards.
Apple Lisa Playlist: https://www.youtube.com/playlist?list=PL4tFqFVNf5LQ-OE8JGNMJQoVOmgkyTorC
Part 1: https://youtu.be/77El1RmSY0Q
Part 2: https://youtu.be/zZ84-9zjmYY
Part 3: This part!
Part 4: https://youtu.be/zSlv7GZdFUg
Part 5: https://youtu.be/ohLDLJR-4-o
Part 6: https://youtu.be/HMEDMvb4IjM
Part 7: https://youtu.be/Vwr8A6k9cNM
Links
Alexs Github with replacement Lisa PCBs:
https://github.com/alexthecat123/Lisa-PCBs
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Instructional videos
My video on chip removal without damage:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino Apple Lisa Part 3: Im looking for a good CRT for th Lisa](https://i.ytimg.com/vi/I6Mp-OVm92U/mqdefault.jpg)
![Troubleshooting a 360k floppy drive (Fujitsu M2551A)
This old double density drives are getting harder to find and expensive, so anytime I run into one that isnt working, I try to fix it. This drive seems to spin but not read anything. Lets diagnose and figure out whats keeping it from working.
Twinhead MDA card repair:
https://youtu.be/rQs_ioCPs4U
0:00 Into
1:35 Part 1: The Basics
16:12 Part 2: Repairing this drive
Links
Printout for drive speed:
https://archive.org/details/300-rpm-drive-speed-spin-test
Greaseweazle:
https://github.com/keirf/greaseweazle
IMD / ImageDIsk:
http://dunfield.classiccmp.org/img/
Adrians Digital Basement Merch store:
https://my-store-c82bd2-2.creator-spring.com/
Adrians Digital Basement ][ (Second Channel)
https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
https://www.patreon.com/adriansdigitalbasement
My GitHub repository:
https://github.com/misterblack1?tab=repositories
Tools
Deoxit D5:
https://amzn.to/2VvOKy1
http://store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
https://amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
https://amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
https://amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
https://www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
https://amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM Programmer: (The MiniPro)
https://amzn.to/2wG4tlP
https://www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
https://amzn.to/2K36dJ5
https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
https://www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
https://amzn.to/2RDSDQw
https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
https://amzn.to/3b8LOhG
https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
http://www.retrotink.com/
Plato (Clone) Side Cutters: (Order Five)
https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
https://www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
https://amzn.to/3b8LOOI
Instructional videos
My video on chip removal without damage:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino Troubleshooting a 360k floppy drive (Fujitsu M2551A)](https://i.ytimg.com/vi/IYuTdd7zfDw/mqdefault.jpg)