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- .TH RTC 3
- .SH NAME
- rtc \- real-time clock and non-volatile RAM
- .SH SYNOPSIS
- .B bind #r /dev
- .PP
- .B /dev/rtc
- .br
- .B /dev/nvram
- .SH DESCRIPTION
- The
- .I rtc
- device supports devices
- with real-time clocks and non-volatile RAM.
- .PP
- The
- .B rtc
- file behaves just like
- .BR /dev/time
- (see
- .IR cons (3)).
- The real-time clock is maintained on-board;
- .B /dev/time
- is set from the file server. Neither is necessarily more accurate.
- .PP
- The
- .B nvram
- file provides (if permission allows)
- access to the local non-volatile RAM.
- For example,
- .IR boot (8)
- reads the machine's key
- from there
- (see
- .IR auth (8)).
- .SH SEE ALSO
- .IR auth (8),
- .IR boot (8)
- .SH SOURCE
- .B /sys/src/9/*/devrtc.c
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