---
name: "bbc"
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/bbc"
---

# bbc(4)

SPARC64 BootBus Controller

## NAME

**bbc** – SPARC64 BootBus Controller

## SYNOPSIS

**bbc\* at ebus?**

## DESCRIPTION

The **bbc** driver provides support for the BootBus Controllers found on UltraSPARC III systems.

The **bbc** driver configures the system to do a full system reset when the watchdog timer provided by [pmc(4)](/pmc/4.md) expires.

## SEE ALSO

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

## HISTORY

The **bbc** driver first appeared in OpenBSD 4.2.

## AUTHORS

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