PMC(4) Device Drivers Manual (sparc64) PMC(4)

pmcpower management controller

pmc* at ebus?

The pmc driver provides support for the watchdog feature of the power management device of the National Semiconductor PC87317 SuperIO chip found on UltraSPARC III systems.

The watchdog timer provides a standard watchdog(4) interface, and has a granularity of 60 seconds.

bbc(4), intro(4), watchdog(4)

The pmc driver first appeared in OpenBSD 4.2.

The pmc driver was written by Mark Kettenis <>.

July 16, 2013 OpenBSD 7.5