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

# cardbus(4)

introduction to CardBus support

## NAME

**cardbus**, **cbb** – introduction to CardBus support

## SYNOPSIS

**cbb\*      at pci?** **cardslot\* at cbb?** **cardbus\*  at cardslot?** **pcmcia\*   at cardslot?**

## DESCRIPTION

OpenBSD provides machine-independent bus support and drivers for CardBus devices.

OpenBSD provides support for the following devices. Note that not all architectures support all devices.

### Wired network interfaces

- [dc(4)](/dc/4.md)

  DEC/Intel 21140/21142/21143/21145 and clones 10/100 Ethernet device

- [fxp(4)](/fxp/4.md)

  Intel EtherExpress PRO/100 10/100 Ethernet device

- [re(4)](/re/4.md)

  Realtek 8139C+/8169/816xS/811xS/8168/810xE 10/100/1Gb Ethernet device

- [rl(4)](/rl/4.md)

  Realtek 8129/8139 10/100 Ethernet device

- [xl(4)](/xl/4.md)

  3Com EtherLink XL and Fast EtherLink XL 10/100 Ethernet device

### Wireless network interfaces

- [acx(4)](/acx/4.md)

  TI ACX100/ACX111 IEEE 802.11a/b/g wireless network device

- [ath(4)](/ath/4.md)

  Atheros IEEE 802.11a/b/g wireless network device with GPIO

- [athn(4)](/athn/4.md)

  Atheros IEEE 802.11a/b/g/n wireless network device

- [atw(4)](/atw/4.md)

  ADMtek ADM8211 IEEE 802.11b wireless network device

- [bwi(4)](/bwi/4.md)

  Broadcom AirForce IEEE 802.11b/g wireless network device

- [malo(4)](/malo/4.md)

  Marvell Libertas IEEE 802.11b/g wireless network device

- [pgt(4)](/pgt/4.md)

  Conexant/Intersil Prism GT Full-MAC IEEE 802.11a/b/g wireless network device

- [ral(4)](/ral/4.md)

  Ralink Technology/MediaTek IEEE 802.11a/b/g/n wireless network device

- [rtw(4)](/rtw/4.md)

  Realtek RTL8180L IEEE 802.11b wireless network device

### Serial interfaces

- [com(4)](/com/4.md)

  serial communications interface

- [puc(4)](/puc/4.md)

  PCI “universal” communications card driver

### Miscellaneous devices

- [ehci(4)](/ehci/4.md)

  USB Enhanced Host Controller Interface

- [ohci(4)](/ohci/4.md)

  USB Open Host Controller Interface

- [uhci(4)](/uhci/4.md)

  USB Universal Host Controller Interface

## SEE ALSO

[intro(4)](/intro/4.md), [pcibios(4)](/pcibios/4.md), [pcmcia(4)](/pcmcia/4.md)

## HISTORY

The **cardbus** driver first appeared in NetBSD 1.5. OpenBSD support was added in OpenBSD 2.7.