RTC(3) RTC(3)
NAME
rtc - real-time clock and non-volatile RAM
SYNOPSIS
bind #r /dev
/dev/rtc
/dev/nvram
DESCRIPTION
The rtc device supports the Mostek MK48T12-15
Zeropower/Timekeeper and similar devices with real-time
clocks and non-volatile RAM.
The rtc file behaves just like /dev/time (see cons(3)). The
real-time clock is maintained on-board; /dev/time is set
from the file server. Neither is necessarily more accurate.
The nvram file provides (if permission allows) access to the
local non-volatile RAM. For example, boot(8) reads the
machine's key (see auth(8)) from there.
SEE ALSO
auth(8), boot(8)