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BERKWDT(4) Device Drivers Manual BERKWDT(4)

berkwdtBerkshire Products watchdog timer device

berkwdt0 at pci?

The berkwdt driver provides support for the Berkshire Products PCI PC Watchdog. These devices contain a watchdog timer and general purpose digital inputs and outputs, but currently only the watchdog timer is supported.

berkwdt provides the standard watchdog(4) interface and may be used with watchdogd(8). The watchdog timer may be configured to a value from 1 second to 18 hours.

intro(4), pci(4), watchdog(4), sysctl(8), watchdogd(8)

The berkwdt driver first appeared in OpenBSD 4.6.

The berkwdt driver was written by Wim Van Sebroeck <>.

July 16, 2013 OpenBSD-6.4