EcoRenovator  

Go Back   EcoRenovator > Off Topic > The Billiards Room
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 03-28-19, 06:56 PM   #1
Xringer
Lex Parsimoniae
 
Xringer's Avatar
 
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,821
Thanks: 104
Thanked 238 Times in 220 Posts
Default The Fairchild_F8 Or How I Learned to Code..

https://wikivisually.com/wiki/Fairchild_F8

Back around 1975, there was an place in Cambridge MA where me and some of my Ham radio buddies would buy power supplies parts. We had a source for old UHF Taxi cab Moto radios that required 22 amps at 12 volts.
One day, I saw they were selling the F8 eval kit. I had been learning about TTL and modems etc, so I wanted to buy the kit. It came as a bare board with all the tiny parts loose in a bag.
Later on I built a terminal (TV Typewriter 2) https://en.wikipedia.org/wiki/TV_Typewriter
I expanded the memory buss so I could use S-100 Buss RAM cards. After finding a photo-diode array that could read paper-tape (an early form of computer tape) I learned a lot about machine language programming with that little board.. Later I went on to buy the IMSAI 8080 https://en.wikipedia.org/wiki/IMSAI_8080 Learned it's machine code and ran CPM and Basic. I loved Basic, and used it for all sorts of applications during my career at NEC as engineer and then as Tech Nerd at MIT Lincoln Labs.
A few years after I retired, I removed the F8 from it's big aluminum box, tested it, and then mounted it on a wooden board. This rare early microcomputer was going to be handed down (with the IMSAI 8080) to my family.

Yeah, that was the plan. It didn't work out. During the winter I noticed some rust on my large crescent wrench, but since nothing seemed to be wet, I just cleaned up the wrench and tossed into the basket of tools I had been using.
It was a very slow leak.. But, I didn't notice it until today..
I guess procrastinating replacing those defective 1/2" fittings was a bad idea. This summer, I'll be doing a lot of PEX work.. Those fittings were recalled decades ago, I was pushing my luck.. Until I ran out.






Attached Thumbnails
Click image for larger version

Name:	leak.jpg
Views:	39
Size:	52.3 KB
ID:	8571   Click image for larger version

Name:	F8.jpg
Views:	46
Size:	115.6 KB
ID:	8572   Click image for larger version

Name:	sharkbite.jpg
Views:	40
Size:	46.6 KB
ID:	8573  
__________________
My hobby is installing & trying to repair mini-splits
EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

Last edited by Daox; 03-29-19 at 09:16 AM..
Xringer is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:09 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design