---
name: "vrtc"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/vrtc"
---

# vrtc(4)

virtual real-time clock

## NAME

**vrtc** – virtual real-time clock

## SYNOPSIS

**vrtc0 at vbus?**

## DESCRIPTION

The **vrtc** driver provides support for the time of day service provided by the UltraSPARC Hypervisor as found on sun4v systems.

## SEE ALSO

[intro(4)](/intro/4.md), [vbus(4)](/vbus/4.md)

## HISTORY

The **vrtc** driver first appeared in OpenBSD 4.4.

## AUTHORS

The **vrtc** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.