NVRAM(4) | Device Drivers Manual (amd64) | NVRAM(4)

# NAME

`nvram` — driver for reading PC NVRAM contents

# SYNOPSIS

`pseudo-device nvram 1`

# DESCRIPTION

The `nvram` device provides read-only access to the non-volatile memory contained in the MC146818 real-time clock.

This data is provided as a seekable character device, /dev/nvram. Checksums of the NVRAM contents are calculated over bytes 2 to 31 and stored in byte 32. A valid checksum is required for the driver to initialize.

# FILES

/dev/nvram

# HISTORY

`nvram` support was originally included in OpenBSD 3.7.

August 2, 2007 | Debian