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PRTC(4) Device Drivers Manual (sparc64) PRTC(4)

prtc
PROM real-time clock

prtc0 at mainbus0

The prtc driver provides support for the time of day service provided by the PROM on systems that do not have a hardware real-time clock like the Sun Enterprise 10000, Sun Fire 12K and Sun Fire 15K.

intro(4)

The prtc driver first appeared in OpenBSD 4.4.

The prtc driver was written by Mark Kettenis <kettenis@openbsd.org>.
July 16, 2013 OpenBSD-current