IBM MCGA Gate Array Reverse Engineering

4 comments

• fredoralive5 hours ago
  It’s interesting that the gate arrays are supplied by Seiko, and the only known MCGA systems apart from IBM are from Epson. The bit of Seiko that made the gate arrays appears to be… Seiko Epson. So is it a coincidence? Sub-licensing? Skullduggery?
  • andrewshadura1 hour ago
    Not sure what you're trying to say. The full name of Epson is Seiko Epson.
    • fredoralive32 minutes ago
      Seiko can cover a fairly large group of companies, Seiko Epson is a particular subgroup of it (now somewhat detached from the main group).
• bananaboy3 hours ago
  Wow this is amazing work!
• bitwize6 hours ago
  A fucking built-in genlock? For years I thought only Amigas had those!
  • ggm6 hours ago
    Put on the die, but only expose on the $$$$ builds using it?
    • skissane55 minutes ago
      Maybe it&#x27;s buggy or something? Unreliable? Use causes overheating or RF interference issues?<p>Maybe IBM added it for project X, and then project X got cancelled, and everyone else forgot it was ever there...
    • fredoralive5 hours ago
      The article mentions that it is brought out to the connector, multiplexed with the monitor ID pins.
• pavlov1 hour ago
  [flagged]