---
name: "acpimadt"
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/acpimadt"
---

# acpimadt(4)

ACPI APIC configuration

## NAME

**acpimadt** – ACPI APIC configuration

## SYNOPSIS

**acpimadt\* at acpi?**

## DESCRIPTION

The **acpimadt** driver configures system processors and I/O APICs based on information extracted from the ACPI APIC table.

## SEE ALSO

[acpi(4)](/acpi/4.md), [cpu(4)](/cpu/4.md), [intro(4)](/intro/4.md), [ioapic(4)](/ioapic/4.md)

## HISTORY

The **acpimadt** driver first appeared in OpenBSD 4.1.

## AUTHORS

The **acpimadt** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.