IBM MCGA Gate Array Reverse Engineering
42 points
7 hours ago
| 3 comments
| github.com
| HN
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fredoralive
5 hours ago
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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?
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andrewshadura
1 hour ago
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Not sure what you're trying to say. The full name of Epson is Seiko Epson.
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fredoralive
26 minutes ago
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Seiko can cover a fairly large group of companies, Seiko Epson is a particular subgroup of it (now somewhat detached from the main group).
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bananaboy
3 hours ago
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Wow this is amazing work!
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bitwize
6 hours ago
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A fucking built-in genlock? For years I thought only Amigas had those!
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ggm
5 hours ago
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Put on the die, but only expose on the $$$$ builds using it?
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skissane
49 minutes ago
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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...

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fredoralive
5 hours ago
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The article mentions that it is brought out to the connector, multiplexed with the monitor ID pins.
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