NAME    [Toc]    [Back]

     lm - National Semiconductor LM78, LM79 and compatible  hardware monitors

SYNOPSIS    [Toc]    [Back]

     lm0 at isa? port 0x290
     lm1 at isa? port 0x280
     lm2 at isa? port 0x310

DESCRIPTION    [Toc]    [Back]

     The  lm driver provides support for the National Semiconductor LM series
     hardware monitors and register compatible chips to  be  used
with the
     sysctl(8) interface.

     Most supported devices possess 11 sensors:

           Sensor    Units    Typical Use
           IN0       uV DC    Core voltage
           IN1       uV DC    Unknown
           IN2       uV DC    +3.3V
           IN3       uV DC    +5V
           IN4       uV DC    +12V
           IN5       uV DC    -12V
           IN6       uV DC    -5V
           Temp      uK       Motherboard Temperature
           Fan0      RPM      Fan
           Fan1      RPM      Chassis Fan
           Fan2      RPM      Fan

     For  some devices (most Winbond devices), sensors' names and
numbers will
     be different.

     Due to hardware  limitations,  fresh  sensor  data  is  only
available every
     1.5 seconds.

HARDWARE    [Toc]    [Back]

     Chips supported by the lm driver include:
           National Semiconductor LM78 and LM78-J
           National Semiconductor LM79
           Winbond W83697HF
           Winbond W83627HF, W83627THF, W83781D and W83782D

SEE ALSO    [Toc]    [Back]

     sensorsd(8), sysctl(8)

HISTORY    [Toc]    [Back]

     The  lm driver first appeared in NetBSD 1.5, OpenBSD support
was added in
     OpenBSD 3.4.

AUTHORS    [Toc]    [Back]

     The lm driver was written  by  Bill  Squier  and  ported  to
OpenBSD 3.4 by
     Alexander Yurchenko <[email protected]>.

BUGS    [Toc]    [Back]

     Interrupt support is unimplemented.

     There  are  currently  no  known  pnpbios IDs assigned to LM
chips.

OpenBSD     3.6                        February     26,      2000