mc(4)

mc4

Am79c940 (mace) on-board ethernet device

Usage

mc* at macobio?

Overview

The mc interface provides access to a 10 Mb/s Ethernet network via the AMD Am79C940 (MACE) Ethernet chip set.

The mc interface supports the on-board Ethernet of most old world Power Macintosh systems.

Machines supported by the mc driver include:

  • Power Macintosh 7600, 8500, 9500 and 9600.

History

The mc driver first appeared in OpenBSD 4.1.

Authors

The mc Ethernet driver was written by Dave Huang.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.