DPCLOCK(4) Device Drivers Manual (sgimips) DPCLOCK(4)

dpclock
DP8573A real-time clock

dpclock* at hpc0 offset ?

The dpclock driver provides support for the DP8573A real-time clock (RTC). This device appears on SGI Personal Iris 4D/2x, 4D/3x and Indigo machines. Note that the kernel expects the RTC to run in UTC.

sgimips/dsclock(4), sgimips/intro(4)

The dpclock driver first appeared in NetBSD 2.0.
February 17, 2017 NetBSD 9.4