---
name: "necsb"
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/necsb"
---

# necsb(4)

NEC PC-9801-86 sound board

## NAME

**necsb** – NEC PC-9801-86 sound board

## SYNOPSIS

**necsb0 at cbus?** **audio\* at necsb?**

## DESCRIPTION

The **necsb** driver supports NEC PC-9801-86 sound board on [cbus(4)](/cbus/4.md). This board is a half-duplex device.

## SEE ALSO

[audio(4)](/audio/4.md), [cbus(4)](/cbus/4.md), [intro(4)](/intro/4.md)

## HISTORY

The **necsb** driver first appeared in OpenBSD 5.7.

## BUGS

The FM synthesizer is not supported.