Uploaded August 2024 | Updated September 2026, 2 weeks ago
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 couldn't 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:
github.com/ki3v/xtramtest
Motherboard RAM issues videos:
youtube.com/watch?v=IPryUBnbM_I
youtube.com/watch?v=GMh5YUbLqLs
AST RAM card repair (attempt):
youtu.be/ascPR_uWnM0
XT Motherboard repair video:
Part 1 - youtube.com/watch?v=BJAUW2jq2wI
Part 2 - youtube.com/watch?v=VKiuJbhVbrk
Book8088 Repair video:
youtube.com/watch?v=m3ETdhOuZ2w (unboxing)
youtube.com/watch?v=DAPCi-TQiy8 (repair)
IBM CGA card repair video:
youtube.com/watch?v=0WMTYZ60OvE
youtube.com/watch?v=Ll3Zp3kr8l4
All about March RAM testing:
researchgate.net/publication/3349024_March_U_A_test_for_unlinked_memory_faults
ijvdcs.org/uploads/524361IJVDCS2672-94.pdf
Rudd's Diagnostics:
minuszerodegrees.net/ruuds_diagnostic_rom/misc/Ruuds%20Diagnostic%20ROM%20-%20Tests%20-%20Version%205.1.htm
forum.vcfed.org/index.php?threads/ruuds-diagnostic-rom.1244040
41256 DRAM datasheet:
docs.rs-online.com/fdaa/0900766b8002bbd8.pdf
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
My GitHub repository:
github.com/misterblack1?tab=repositories
-- 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
--- Instructional videos
My video on damage-free chip removal:
youtube.com/watch?v=XQVjwPsVFd8
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
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 couldn't 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:
github.com/ki3v/xtramtest
Motherboard RAM issues videos:
youtube.com/watch?v=IPryUBnbM_I
youtube.com/watch?v=GMh5YUbLqLs
AST RAM card repair (attempt):
youtu.be/ascPR_uWnM0
XT Motherboard repair video:
Part 1 - youtube.com/watch?v=BJAUW2jq2wI
Part 2 - youtube.com/watch?v=VKiuJbhVbrk
Book8088 Repair video:
youtube.com/watch?v=m3ETdhOuZ2w (unboxing)
youtube.com/watch?v=DAPCi-TQiy8 (repair)
IBM CGA card repair video:
youtube.com/watch?v=0WMTYZ60OvE
youtube.com/watch?v=Ll3Zp3kr8l4
All about March RAM testing:
researchgate.net/publication/3349024_March_U_A_test_for_unlinked_memory_faults
ijvdcs.org/uploads/524361IJVDCS2672-94.pdf
Rudd's Diagnostics:
minuszerodegrees.net/ruuds_diagnostic_rom/misc/Ruuds%20Diagnostic%20ROM%20-%20Tests%20-%20Version%205.1.htm
forum.vcfed.org/index.php?threads/ruuds-diagnostic-rom.1244040
41256 DRAM datasheet:
docs.rs-online.com/fdaa/0900766b8002bbd8.pdf
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
My GitHub repository:
github.com/misterblack1?tab=repositories
-- 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
--- Instructional videos
My video on damage-free chip removal:
youtube.com/watch?v=XQVjwPsVFd8
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
