Mystery 1985 vintage "HBATD1" and "3550 TD1" evaluation boards

• Mystery 1985 vintage "HBATD1" and "3550 TD1" evaluation boards
  Posted by ` on 22 Jan, 2016 00:46
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  Presented just for interest, there's two variations on the sales counter at Weird Stuff in California.
  
  Datecode is barely visible in pen on the PCB "7/13/1985". Logo is AMD.
• #1 Reply
  Posted by xrunner on 22 Jan, 2016 01:00
• Pretty (hand drawn?) traces.
• #2 Reply
  Posted by crispy_tofu on 22 Jan, 2016 01:14
• Very cool! 
• #3 Reply
  Posted by xrunner on 22 Jan, 2016 01:39
• Well the logo on the board is for AMD. 
• #4 Reply
  Posted by Vgkid on 22 Jan, 2016 01:59
• What are the non bnc connectors? They look like large smb connectors.
• #5 Reply
  Posted by calexanian on 22 Jan, 2016 06:51
• Wow. "Serious" business there. Bet those were not cheap when new!
• #6 Reply
  Posted by Kalvin on 22 Jan, 2016 08:57
• Might be an eval/test board for the AMD Am3550 ECL/TTL mask-programmable gate array.
  
  http://www.datasheetarchive.com/dl/Scans-000/Scans-006350.pdf
  
• #7 Reply
  Posted by Alex Eisenhut on 22 Jan, 2016 12:52
• Quote from: Vgkid on 22 Jan, 2016 01:59

  What are the non bnc connectors? They look like large smb connectors.
  

  
  My guess is scope probe.
• #8 Reply
  Posted by AF6LJ on 22 Jan, 2016 13:00
• The first one looks like it was made for testing an old AMD K-6 processor.
  Looks like they tried to keep the traces to the socket the same lenght.
  
  Nicely done.
• #9 Reply
  Posted by ` on 22 Jan, 2016 16:31
• Quote from: Kalvin on 22 Jan, 2016 08:57

  Might be an eval/test board for the AMD Am3550 ECL/TTL mask-programmable gate array.
  
  http://www.datasheetarchive.com/dl/Scans-000/Scans-006350.pdf
  

  
  Plausible, the date on the board matches as a pre-production development.