View Full Version : Which version is it ? ALTAIR 680 or 680b ?

September 4th, 2005, 05:51 AM
Well, I have the 680(b) all disassembled now. I noticed a few things while I was taking this apart. Since the logo silkscreen is gone, I'm still trying to determine the model of this machine. My brother was trying some modifications that I didn't know about back then. So I have to try to revert the machine back to it's original state. The serial plate didn't survive the fossilization over the years(it's gone), so I can't determine that serial number for this. I still couldn't determine if this was a 680 or 680b from the looking at the manual. When I was looking online, I found some references to S-100 boards that supposedly were made to plug into the 680b. But there's no place to plug in S-100 boards in this version that I have.
680b boards here ---> http://www.virtualaltair.com/virtualaltair.com/vac_boards.asp

One thing I noticed after I took this part, the mainboard actually says this
MITS 1976
I hope somebody might be able to help identify this model. I'm thinking this is actually a 680 and not a 680b, am I right ?

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November 12th, 2005, 01:55 PM
Go to this thread.


I think it explains what you need to know.