NVRAM(4) - Device Drivers Manual (i386) #

NVRAM(4) - Device Drivers Manual (i386)

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.

OpenBSD 7.5 - May 31, 2007