---
name: "ht"
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/ht/4"
---

# ht(4)

HyperTransport bus

## NAME

**ht** – HyperTransport bus

## SYNOPSIS

**ht\* at mainbus0** **pci\* at ht?**

## DESCRIPTION

The **ht** driver provides support for the HyperTransport bus found on Apple G5 machines. The HyperTransport bus is functionally very similar to the [pci(4)](/pci/4.md) bus.

## SEE ALSO

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

## HISTORY

The **ht** driver first appeared in OpenBSD 3.9.

## AUTHORS

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