[vcf-midatlantic] System Source February Repair workshop

Alexander Pierson ajpierson1 at yahoo.com
Wed Feb 19 19:42:15 EST 2020

 System Source was great! I'm glad I got a chance to go both days (looked like Sunday was off the table initially), and to see so many people I only cross paths with once or twice a year.  The contents of that museum are different from other ones I've seen thus far, and sure, they had a lot of the common big name machines, but they also had quite a few that I hadn't ever seen before in person.  Related note, they have a Westinghouse 1600 terminal, which I had never seen before, much less heard of.  Have any of y'all crossed paths with them?
I rewired the rats nest in my OSI Challenger 4P, and added in an A15 I/O connector board.  Fired it up when I got back home and could reassemble the hardware bits, which you can see here.  I was able to compare against the configuration of Bill Dromgoole's Challenger (which has an A15).  I've never seen so many OSI machines in one place before, and no two were the same.  More pictures on twitter.
Jonathan Sturges and Jeff Salzman were debugging their VIC-20's, and I hope my input was helpful in their respective repair processes.  Had I thought about it, I would have dragged in some spare VIC parts, tools, and appropriate documentation.
All in all, it was a blast.  I'm glad it was close enough for me to attend without much hassle.  
-Alexander 'Z' Pierson
    On Wednesday, February 19, 2020, 02:53:00 PM EST, Ethan O'Toole via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org> wrote:  
 > I have a pretty good writeup and info about loading BASIC onto an Altair,
> and if the cards are the *same port* it will work on the IMSAI as well.
> Assuming a MITS SIO2 or the equivalent settings such as with the Processor
> Tech SIO card.  I don't know all of the details but I have done this many
> different ways on a number of S100 systems, happy to help if I can.
> http://vintagecomputer.net/browse_thread.cfm?id=318
> http://vintagecomputer.net/browse_thread.cfm?id=531
> Bill

Hello Bill,

  I have the 88-2SIO board which is supposed to be 100% ALTAIR 
compatibile. Off the top of my head the 1st Serial port is at 10H

  Also, I didn't use any kind of loader. I ascii upload it thru the rom 
monitor on the 88-2SIO starting at address 0000. Then execute at 0000.

             - Ethan

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