Uploaded May 2026 | Updated September 2026, 2 weeks ago
I'm finally making some progress fixing the battery damaged Amiga 3000, and that makes me very happy. Thanks for everyone who has been helping with this repair.
Part 1: youtu.be/BWvVkza1m1g
Part 2: youtu.be/nA-FHdahNAo
Part 3: This part
0:00 Intro
2:15 Demonstrating the problem
8:47 What's happening during Kickstart init
11:10 Comparing different Kickstart boot sequence
15:35 How about a ROM patch?
21:17 Installing Workbench 3.1 onto a BlueSCSI
36:43 Fixing/rebuilding the clock/calendar circuit
54:28 Addressing the broken Flicker Fixer
-- Links
Kickstart yellow-screen fix patcher:
github.com/misterblack1/A3000_kickstart_patch/tree/main
Spreadsheet comparing the boot process of various Kickstart versions:
docs.google.com/spreadsheets/d/1ADmB7wnGe3Aa9Qh7mQzUIIVfPfIEcclG/edit?usp=sharing&ouid=117528869241822185109&rtpof=true&sd=true
Schematics:
support.retrorewind.ca/media/commodore/amiga/a3000_schematics.pdf
Adrian's Digital Basement ][ (Second Channel)
youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
patreon.com/adriansdigitalbasement
My GitHub repository:
github.com/misterblack1?tab=repositories
--- Instructional videos
My video on chip removal without damage:
youtube.com/watch?v=XQVjwPsVFd8
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
I'm finally making some progress fixing the battery damaged Amiga 3000, and that makes me very happy. Thanks for everyone who has been helping with this repair.
Part 1: youtu.be/BWvVkza1m1g
Part 2: youtu.be/nA-FHdahNAo
Part 3: This part
0:00 Intro
2:15 Demonstrating the problem
8:47 What's happening during Kickstart init
11:10 Comparing different Kickstart boot sequence
15:35 How about a ROM patch?
21:17 Installing Workbench 3.1 onto a BlueSCSI
36:43 Fixing/rebuilding the clock/calendar circuit
54:28 Addressing the broken Flicker Fixer
-- Links
Kickstart yellow-screen fix patcher:
github.com/misterblack1/A3000_kickstart_patch/tree/main
Spreadsheet comparing the boot process of various Kickstart versions:
docs.google.com/spreadsheets/d/1ADmB7wnGe3Aa9Qh7mQzUIIVfPfIEcclG/edit?usp=sharing&ouid=117528869241822185109&rtpof=true&sd=true
Schematics:
support.retrorewind.ca/media/commodore/amiga/a3000_schematics.pdf
Adrian's Digital Basement ][ (Second Channel)
youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
patreon.com/adriansdigitalbasement
My GitHub repository:
github.com/misterblack1?tab=repositories
--- Instructional videos
My video on chip removal without damage:
youtube.com/watch?v=XQVjwPsVFd8
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
![Fixing an old disk drive with 3D printed parts (Tandon TM-100)
#diskdrive #3dprinting
Tandon TM-100 drives have a design flaw that causes the front lever to break, rendering the drive useless. This happened to me on one of drives, so in this video, I set out to fix it.
TM-100-1 - 48 TPI SS/DD 40 Tracks
TM-100-2 - 48 TPI DS/DD 80 Tracks
TM-100-3 - 96 TPI SS/DD 80 Tracks
TM-100-4 - 96 TPI DS/DD 160 Tracks
TM-100-3M - 100 TPI SS/DD 80 Tracks
TM-100-4M - 100 TPI DS/DD 80 Tracks per Side
Video Links
Tandon TM-100 door pivot point:
https://www.thingiverse.com/thing:3135233
Tandon TM-100 door:
https://www.thingiverse.com/thing:4626180
Repairing a TRS-80 Model III motherboard:
https://www.youtube.com/watch?v=EGFKjjlvKf4
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 Fixing an old disk drive with 3D printed parts (Tandon TM-100)](https://i.ytimg.com/vi/KGuJ185u5f0/mqdefault.jpg)
![Tech archeology: Exploring mysterious computer parts
Please see pinned comment for updates! Who doesnt love a good rummage through a box of random PC parts? In todays video I do just that I dig into this filled box of computer parts looking for interesting and unknown cards. Part 2 will be next week when I dig seeing if I can get any of the cards working.
Part 1: This part!
Part 2: Coming soon
Info
Creative Labs CT2770 Sound Blaster 16 Value
(With CT1471 chip there does have real OPL3 sound, allegedly)
Creative Labs CT4500 Sound Blaster AWE64 Value PNP
Creative Labs CT3620 Sound Blaster 32
Creative Labs CT4520 Sound Blaster AWE64 Value PNP
Creative Labs CT2940 Sound Blaster 16 PNP
MQX-16 Music Quest Inc.
Scan Cap by Conversion Technology Copyright 1991
BlackFoot by Arroyo Technologies for the Macintosh II NuBus
Eclipse II Portacom Technologies VGA card with P86C911 Chip
Links
Freetech/Flexus 486F55 Motherboard
https://theretroweb.com/motherboards/s/freetech-flexus-486f55
Keithley DDA-08/16
https://download.tek.com/manual/78340B(DDA08_16).pdf
Dumped ROMs for TMS Vectrix EX1280 video card:
https://archive.org/details/vectrix-ex-1280-front
Dump ROM from BlackFoot card:
https://archive.org/details/27-c-256-dip-28
S100 bus RAM card TDL Z16:
http://www.s100computers.com/Hardware%20Folder/TDL/Z16%20RAM/TDL%2016K%20RAM.htm
Heath EGA 150-307-3 Rev 1.33 and P/N 150-307-2 Rev 1.32
https://www.vogons.org/viewtopic.php?t=64541
Apple Talk TOPS card:
http://archive.retro.co.za/mirrors/68000/www.vintagemacworld.com/pc_hardware.html
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 Tech archeology: Exploring mysterious computer parts](https://i.ytimg.com/vi/KW8XP_cQ5Hk/mqdefault.jpg)
![A brand new XT RAM test ROM and an update on some unfixable parts
I recently had a number of videos where I struggle to understand why my XT clone motherboard had fata RAM issues that prevented it from working. I tried to fix it but got no where. The same thing happened with an AST RAM card, where it also had random issues that I couldnt sold. So with my friend David, we created a new IBM PC diagnostic ROM that runs a very comprehensive RAM test to help fix these two broken parts, but they just work now! What the ........
Links
IBM PC RAM diagnostic ROM:
https://github.com/ki3v/xtramtest
Motherboard RAM issues videos:
https://www.youtube.com/watch?v=IPryUBnbM_I
https://www.youtube.com/watch?v=GMh5YUbLqLs
AST RAM card repair (attempt):
https://youtu.be/ascPR_uWnM0
XT Motherboard repair video:
Part 1 - https://www.youtube.com/watch?v=BJAUW2jq2wI
Part 2 - https://www.youtube.com/watch?v=VKiuJbhVbrk
Book8088 Repair video:
https://www.youtube.com/watch?v=m3ETdhOuZ2w (unboxing)
https://www.youtube.com/watch?v=DAPCi-TQiy8 (repair)
IBM CGA card repair video:
https://www.youtube.com/watch?v=0WMTYZ60OvE
https://www.youtube.com/watch?v=Ll3Zp3kr8l4
All about March RAM testing:
https://www.researchgate.net/publication/3349024_March_U_A_test_for_unlinked_memory_faults
https://www.ijvdcs.org/uploads/524361IJVDCS2672-94.pdf
Rudds Diagnostics:
https://minuszerodegrees.net/ruuds_diagnostic_rom/misc/Ruuds%20Diagnostic%20ROM%20-%20Tests%20-%20Version%205.1.htm
https://forum.vcfed.org/index.php?threads/ruuds-diagnostic-rom.1244040/
41256 DRAM datasheet:
https://docs.rs-online.com/fdaa/0900766b8002bbd8.pdf
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 damage-free chip removal:
https://www.youtube.com/watch?v=XQVjwPsVFd8
Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino A brand new XT RAM test ROM and an update on some unfixable parts](https://i.ytimg.com/vi/KcrMssDp8Mo/mqdefault.jpg)
![PC Archeology: A left for Dead IBM PC 5150 with a treasure hiding inside 🕷
Its time for another episode of PC Archeology! This time we have a IBM PC 5150 that was picked out of the recycle bin, about to be shredded. I thought this was just going to be another run of the mill PC, but you never know what you might find inside.
Links
Testing floppy drives:
https://www.youtube.com/watch?v=xtHwYQyhkAc
Minus Zero Degrees (the best resource for IBM PCs:)
https://www.minuszerodegrees.net/index.htm
https://www.minuszerodegrees.net/5150/early/5150_early.htm
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 PC Archeology: A left for Dead IBM PC 5150 with a treasure hiding inside 🕷](https://i.ytimg.com/vi/KepvxT6Yc7E/mqdefault.jpg)
![Repair of a Mac Plus with a mysterious fault
Its time for another 68k Mac repair. I thought it would be a quick and easy fix, but this turned out to be a but more mysterious.
Info
Microbug:
DM (dump memory)
SM (set memory)
Video page:
U15D VIA 6522 PA6 Pin 8 to U4G 74AS253 Pin 4
From microbug, I was writing to
3F A700 Screen Buffer 1
00 0000 - 3F FFFF 0M - 4MB Total address space
00 0000 - 0F FFFF 0M - 1MB
00 0000 - 07 FFFF 0K - 512k
xx FCFF Screen1 memory end
xx A700 Screen1 Memory start
xx 7C7F Screen2 Memory End
xx 2700 Screen2 Memory Start
Links
Decoding Mac error codes for the 128/512/Plus:
https://tinkerdifferent.com/resources/sad-mac-error-codes.82/
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 Repair of a Mac Plus with a mysterious fault](https://i.ytimg.com/vi/KkEE1wStu7A/mqdefault.jpg)
![Sparks fly while I crash and burn fixing a 386SX motherboard
I recently got this 386SX 40Mhz motherboard during a recent Turbo Mail Call episode, and it is missing parts so it cant run. Lets try to get this board working, so I can see how the performance stacks up to other 386SX boards.
0:00 Intro
1:13 The broken motherboard
13:07 Baseline repairs
24:48 First power up
35:44 Testing a 3rd motherboard
47:79 Continuing the repair attempt
1:00:23 Outro
Links
BIOS dump:
https://archive.org/details/386sx_20260204_0655
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 Sparks fly while I crash and burn fixing a 386SX motherboard](https://i.ytimg.com/vi/L7tnAgL4xIs/mqdefault.jpg)
![Rebuilding a battered Amiga 1200
This late model Commodore Amiga is quite bruised and battered, but I think I have whats needed to get it running again.
Links
The Guru Meditation video on this case:
https://www.youtube.com/watch?v=bjacUX0MNOs
Field Found A500:
https://www.youtube.com/watch?v=V-wNbku3CeI
https://www.youtube.com/watch?v=BOoIlKSTmjk
https://www.youtube.com/watch?v=3gW4ftRPurU
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 Rebuilding a battered Amiga 1200](https://i.ytimg.com/vi/Laoc611UzZ8/mqdefault.jpg)
![BBC Master 128: The evolved 8-bit computer from Acorn
In the basement today we have quite a rare machine (for North America:) The BBC Master 128. Its an evolution of the original Acorn BBC Micro from 1981. My first task is to service the PSU and convert it to 120v, then see if this machine is working.
Part 1: This part!
Part 2: https://youtu.be/jSvSkaxkZDQ
Part 3: https://youtu.be/2Sgleturods
0:00 Intro
21:10 PSU service, conversion to 120V
41:38 First power up of the computer
Video Links
My old video showing off the two BBC Micro machines I brought back from the UK:
https://www.youtube.com/watch?v=KnkHdvjtBmA
BBC Micro PSU repair and 120v conversion:
https://www.youtube.com/watch?v=b6bfYwexlAs&t=1173s
BBC Master:
https://en.wikipedia.org/wiki/BBC_Master
65C12 datasheet:
http://archive.6502.org/datasheets/cmd_g65scxxx_mpu_family.pdf
Performing a CMOS reset on the BBC Master:
https://lionels.orpheusweb.co.uk/CompNyb/TechStuff/8-Bit/Master128/128BatConfig.html
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 BBC Master 128: The evolved 8-bit computer from Acorn](https://i.ytimg.com/vi/MS_KFcSZaLs/mqdefault.jpg)
![This Apple IIgs repair got really weird
I havent worked on an Apple IIgs in years, so lets see how much Ive forgotten when I try to get this broken machine working again.
0:00 Intro
00:46 Tour of this Apple IIgs
11:49 PSU service
22:46 Basic troubleshooting
33:54 Advanced troubleshooting
46:28 Maybe its the ROM
1:00:56 Collecting evidence
Part 1: This part!
Part 2: https://youtu.be/X_ibswnQm0E
Part 3: https://youtu.be/1YsTvUrQJ-M
Links
OneRom EPROM Emulator:
https://onerom.org/
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 This Apple IIgs repair got really weird](https://i.ytimg.com/vi/MVDTuu-QOe8/mqdefault.jpg)
![I finally fixed the Laser 200 (plus gave it a 32K RAM upgrade)
Its time to revisit the Laser 200 and finally fix the machine that stumped me. We had lots of guesses as to what was wrong, so watch to find out if your guess was right. Also, I figure out how to max out the RAM with an internal RAM expansion.
Part 1: https://youtu.be/vM0EWXKv1YA
Part 2: This part!
0:00 Intro and repair
26:46 More problems
45:15 Expanding the RAM to 34k
1:00:04 Testing games
Links
VZ200 Technical Manual:
http://www.vz200.org/bushy/VZ200_technical_reference_manual.pdf
VZ200 Restoration and Dead test:
https://github.com/rweather/vz200-restoration
SMMC 0022 where I got the Laser 200:
https://youtu.be/DXOP0uP5P60
Arctic Retro:
https://www.youtube.com/@Arcticretro
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 I finally fixed the Laser 200 (plus gave it a 32K RAM upgrade)](https://i.ytimg.com/vi/MnOnCbGJgRE/mqdefault.jpg)
![I replaced the main board of this TV with brand new parts made in 2023!
Prepare yourself for something a little unusual. While shopping on AliExpress I found a brand people selling brand new CRT boards for Televisions. Could this universale board somehow actually work? Well I pulled the trigger and ordered it so we could find out together.
Links
My next project using this board:
https://youtu.be/b9MDo0m3ptA
Manufacturer:
https://www.gz-yichuang.com/
Schematic, Specs and datasheet:
https://github.com/misterblack1/yichuang_crt_board/tree/main
AliExpress Link
https://www.aliexpress.us/item/3256805253057004.html
Search term: CRT TV Motherboard
New complete TV:
https://www.alibaba.com/product-detail/21-CRT-XFLAT-High-repurchase-rate_1600346761656.html
Search term: CRT XFLAT
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 I replaced the main board of this TV with brand new parts made in 2023!](https://i.ytimg.com/vi/MoqflFfvkR0/mqdefault.jpg)