---
name: "wbsd"
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/wbsd"
---

# wbsd(4)

Winbond W83L518D/W83L519D SD memory card interface

## NAME

**wbsd** – Winbond W83L518D/W83L519D SD memory card interface

## SYNOPSIS

**wbsd\* at ebus?** **sdmmc\* at wbsd?**

## DESCRIPTION

The **wbsd** driver provides support for the SD memory card interface of the Winbond W83L518D/W83L519D integrated media reader.

The [sdmmc(4)](/sdmmc/4.md) subsystem performs SD/MMC transactions to communicate with whatever MMC, SD, SDHC, or SDIO devices are inserted into the SD slot.

## SEE ALSO

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

## HISTORY

The **wbsd** driver first appeared in OpenBSD 4.7.

## AUTHORS

The **wbsd** driver was written by Jared D. McNeill ⟨*jmcneill@invisible.ca*⟩ and ported to OpenBSD by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.