VIAENV(4)                 OpenBSD Programmer's Manual                VIAENV(4)

NAME
     viaenv - VIA VT82C686A/VT8231 hardware monitor

SYNOPSIS
     viaenv* at pci?

DESCRIPTION
     The viaenv driver provides support for the hardware monitor and power
     management timer in the VIA VT82C686A and VT8231 South Bridges.  The
     hardware monitor is used with the sysctl(8) interface.

     The device has 10 sensors:

           Sensor    Units    Typical Use
           TSENS1    uK       CPU temperature
           TSENS2    uK       System temperature
           TSENS3    uK       Unknown
           FAN1      RPM      CPU fan
           FAN2      RPM      System fan
           VSENS1    uV DC    CPU core voltage (2.0V)
           VSENS2    uV DC    North Bridge core voltage (2.5V)
           Vcore     uV DC    Internal core voltage (3.3V)
           VSENS3    uV DC    +5V
           VSENS4    uV DC    +12V

     Sensor data is updated every 1.5 seconds.

SEE ALSO
     sensorsd(8), sysctl(8)

HISTORY
     The viaenv driver first appeared in NetBSD 1.5.  OpenBSD support was
     added in OpenBSD 3.4.

AUTHORS
     The viaenv driver was written by Johan Danielsson and ported to
     OpenBSD 3.4 by Alexander Yurchenko <grange@openbsd.org>.

BUGS
     Interrupt support is unimplemented, as is support for setting values.

OpenBSD 4.7                      May 31, 2007                                1
