---
name: "hpb"
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/hpb"
---

# hpb(4)

HyperTransport-PCI bridge

## NAME

**hpb** – HyperTransport-PCI bridge

## SYNOPSIS

**hpb\* at pci?** **pci\* at hpb?**

## DESCRIPTION

The **hpb** driver supports PCI-PCI bridges with HyperTransport Interrupt Capability as found in the IBM CPC945. It provides support for HyperTransport posted write interrupts.

## SEE ALSO

[ht(4)](/ht/4.md), [openpic(4)](/openpic/4.md), [pci(4)](/pci/4.md) “CPC945 Bridge and Memory Controller”, *User Manual*, February 1, 2008.