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VIAENV(4) NetBSD Kernel Interfaces Manual VIAENV(4)
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Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
viaenv -- VIA VT82C686A/VT8231 Hardware Monitor and Power Management
viaenv* at pci? dev ? function ?
The viaenv is an envsys(4) compatible driver for the Hardware Monitor and
the Power Management timer in the VIA VT82C686A and VT8231 South Bridges.
The device has 10 sensors:
Sensor Units Typical Use
TSENS1 uK CPU temperature
TSENS2 uK System temperature
TSENS3 uK ?
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.
The viaenv device appeared in NetBSD 1.5.
Interrupt support is unimplemented, as is support for setting values.
NetBSD 8.1 January 20, 2007 NetBSD 8.1