clock(4)

clock4

Real-time clock

Usage

clock* at sbus? clock* at ebus? clock0 at fhc0 rtc* at ebus?

Overview

The clock device provides support for the real-time clocks based on the following chips:

  • Mostek MK48T02

  • Mostek MK48T08

  • Mostek MK48T18

  • Mostek MK48T59

The rtc device provides support for the real-time clock based on the following chips:

  • Dallas/Maxim Semiconductor DS1287

  • Acer Labs M5819

  • Acer Labs M5823

  • Texas Instruments BQ4802

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.