Building a new memory expansion for my Compaq Portable 3!

Описание: Going against that famous not-actually-a-Bill-Gates quote, 640K isn't enough for me, so today I'm building a modern reproduction of the Compaq Portable III's memory expansion board and maxing it out.

CP3 Expansion reproductions - https://github.com/raymondh2/CompaqPo...

This is part six in my video series on the Compaq Portable III
You can watch previous parts here:
Part one -    • Introduction to my Compaq Portable III pro...  
Part two -    • Memory error troubleshooting on the Compaq...  
Part three -    • Memory error troubleshooting (again) on th...  
Part four -    • Keyboard refurbishing for my Compaq Portab...  
Part five -    • Fixing a hard drive for my Compaq Portable 3  

If you like what I do and want to encourage more, I appreciate your support through likes and comments below. If you have the means, you could also support me on Patreon as money helps me buy broken things to fix and build more projects -   / silvervest  

Bookmarks!
00:00:00 - Intro
00:01:05 - Parts
00:03:18 - Expansion backplane
00:11:25 - Memory expansion card
00:22:33 - All together, time for RAM
00:25:43 - Jumpers?
00:29:47 - Installation
00:31:47 - First boot
00:36:43 - Using extended memory
00:42:56 - Not so fast
00:45:16 - Conclusion

Any feedback is welcome, as always.

Links!
https://en.wikipedia.org/wiki/Compaq_...
http://oldcomputers.net/compaqiii.html
https://www.bourns.com/pdfs/DRAM.pdf
http://retro.timb.us/Systems/Compaq_P...
https://www.pcjs.org/software/pcx86/d...
https://forum.vcfed.org/index.php?thr...
https://en.wikipedia.org/wiki/SmartDrive

Credits!
Music:
First Horizon - ELFL
Low Fidelity Space Waves - ELFL
Masaru Setsumaru - Data Select (from Sonic 3)
Font: Riciery Leal - VCR OSD Mono (https://www.dafont.com/vcr-osd-mono.font)
Putting up with my weird hobbies: My wife

Disclaimer!
I am NOT an expert, I have genuinely NO idea what I'm doing, and mostly just glue things together and use a lot of Google-fu until stuff works. I've been tinkering with electronics since I was a kid but have no formal training and will probably do things incorrectly. If you learn something from this, that's awesome, but trust me - I'm learning too!

#compaq #portable #expansion