MC(4)

✨ NAME ✨

okay so bestie, this is MC(4), from the Kernel Interfaces Manual, and it's the manual page for mc — the Ethernet driver for Am79C940 (MACE) onboard Ethernet. no cap, that's the name situation. 💅

🌸 SYNOPSIS 🌸

mc* at obio?

🦋 DESCRIPTION 🦋

The mc interface gives you access to a 10 Mb/s Ethernet network via the AMD Am79C940 (MACE) Ethernet chip set. literally that's the whole glow-up, and it's iconic. ✨

💻 HARDWARE 💻

okay so the mc interface supports the on-board Ethernet of these mac68k machines, and the list is very "check your model bestie":

• Centris 660AV
• Quadra 660AV
• Quadra 840AV

and it also supports the on-board Ethernet of these macppc machines:

• Apple Network Server (500 and 700)
• Apple Power Macintosh (7200, 7300, 7500, 7600, 8500, 8600, 9500, and 9600)
• Power Computing (PowerCenter, PowerCenter Pro, PowerCurve, PowerTower, PowerTower Pro, and PowerWave)

🔍 DIAGNOSTICS 🔍

When autoconfig does its thing, you may see this message:

mc0 at obio0: address %s.

That's a normal autoconfiguration message, no drama — it notes the 6 byte physical Ethernet address of the adapter. so if you see it, you're not in trouble, bestie. 🫶

👀 SEE ALSO 👀

the manpage besties in the same universe:

• gem(4)
• mac68k/ae(4)
• sn(4)
• tlp(4)
• ifconfig(8)

⭐ HISTORY ⭐

The mc interface first appeared in NetBSD 1.3. a real vintage moment, lowkey. 👑

🎀 AUTHORS 🎀

The mc Ethernet driver was written by Dave Huang ⟨khym@bga.com⟩.

The man page was written by Thomas Klausner ⟨wiz@NetBSD.org⟩ and Michael Wolfson ⟨mbw@NetBSD.org⟩.

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and that's the whole page, bestie — it comes from Debian, dated September 2, 2017, and it's serving MC(4) realness. 💖✨🎀