---
name: "mpu"
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/mpu"
---

# mpu(4)

Roland/Yamaha MPU401 MIDI UART device

## NAME

**mpu** – Roland/Yamaha MPU401 MIDI UART device

## SYNOPSIS

**mpu\*  at isa? port 0x300** **mpu\*  at isapnp?** **midi\* at mpu?**

## DESCRIPTION

The **mpu** driver provides support for the Roland/Yamaha MPU401 (and compatible) MIDI UART cards.

Access to the device is through the MIDI driver.

## SEE ALSO

[isa(4)](/isa/4.md), [midi(4)](/midi/4.md)

## HISTORY

The **mpu** device driver appeared in OpenBSD 2.6.