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MAINBUS(4) Device Drivers Manual (mac68k) MAINBUS(4)

mainbusMac68k main processor bus device

mainbus0 at root

The mainbus interface serves as an abstraction used by the autoconfiguration system to help find and attach busses (e.g. the NuBus expansion bus) or devices (e.g. the math coprocessor) connected to the Macintosh main processor bus.

mainbus0 (root).
This is the normal autoconfiguration message indicating that the main processor bus has been found.

mac68k/autoconf(4), mac68k/obio(4)

The mainbus first appeared in NetBSD 1.2.

February 17, 2017 NetBSD-9.2