---
name: "acpicmos"
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/acpicmos"
---

# acpicmos(4)

CMOS memory manager

## NAME

**acpicmos** – CMOS memory manager

## SYNOPSIS

**acpicmos\* at acpi?** (i386 and amd64)

## DESCRIPTION

The **acpicmos** driver handles CMOS memory access requests for all ACPI operations.

## SEE ALSO

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

## HISTORY

The **acpicmos** driver first appeared in OpenBSD 6.4.