IBM MCGA Gate Array Reverse Engineering(github.com)
45 pointsby userbinator8 hours ago4 comments
  • fredoralive6 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?
    • andrewshadura2 hours ago
      Not sure what you're trying to say. The full name of Epson is Seiko Epson.
      • fredoralivean hour 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).
  • bananaboy4 hours ago
    Wow this is amazing work!
  • bitwize7 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?
      • skissanean hour ago
        Maybe it's buggy or something? Unreliable? Use causes overheating or RF interference issues?

        Maybe IBM added it for project X, and then project X got cancelled, and everyone else forgot it was ever there...

      • fredoralive6 hours ago
        The article mentions that it is brought out to the connector, multiplexed with the monitor ID pins.
  • pavlov2 hours ago
    [flagged]