alt.hn

6/27/2026 at 5:17:08 AM

IBM MCGA Gate Array Reverse Engineering

 https://github.com/schlae/IBM_MCGA

by userbinator

6/27/2026 at 7:07:18 AM

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?

by fredoralive

6/27/2026 at 11:10:33 AM

Not sure what you're trying to say. The full name of Epson is Seiko Epson.

by andrewshadura

6/27/2026 at 11:58:34 AM

Seiko can cover a fairly large group of companies, Seiko Epson is a particular subgroup of it (now somewhat detached from the main group).

by fredoralive

6/27/2026 at 8:55:55 AM

Wow this is amazing work!

by bananaboy

6/27/2026 at 5:49:31 AM

A fucking built-in genlock? For years I thought only Amigas had those!

by bitwize

6/27/2026 at 6:26:11 AM

Put on the die, but only expose on the $$$$ builds using it?

by ggm

6/27/2026 at 11:35:52 AM

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...

by skissane

6/27/2026 at 6:52:06 AM

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

by fredoralive

6/27/2026 at 10:41:26 AM

[flagged]

by pavlov