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1219Which version is it, Altair 680 or 680b ?

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  • Dan
    Sep 3, 2005
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      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 what
      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.
      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
      680 MAINBOARD REV 1-6x
      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 ?

      =Dan

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