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OBIO(4) Device Drivers Manual (landisk) OBIO(4)

obio
landisk onboard I/O bus device

obio0 at mainbus?

The obio interface serves as an abstraction used by the autoconfiguration system to help find and attach devices (e.g. the disk controllers) connected to the landisk onboard I/O bus.
OpenBSD provides support for the following devices:
power(4)
power switch
wdc(4)
WD100x compatible hard disk controller driver

intro(4), mainbus(4)

The obio driver first appeared in OpenBSD 4.1.
May 31, 2007 OpenBSD-current