IBM MCGA Gate Array Reverse Engineering

50 pointsposted 11 hours ago
by userbinator
(github.com)

8 Comments

fredoralive

9 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?

andrewshadura

5 hours ago

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

fredoralive

5 hours 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).

bananaboy

8 hours ago

Wow this is amazing work!

bitwize

11 hours ago

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

ggm

10 hours ago

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

skissane

5 hours 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...

fredoralive

10 hours ago

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