LM(4)

NAME
lm - National Semiconductor LM78, LM79 and compatible hardware monitors

SYNOPSIS
lm0 at isa? port 0x290

DESCRIPTION
The lm driver provides support for the National Semiconductor LM series hardware monitors and register compatible chips to be used with the envsys(4) API.

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) sensor names and numbers will be different.

Sensor names as well as nominal RPMs for fans 0 and 1 may be changed through the ENVSYS_STREINFO ioctl(2).

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

HARDWARE
Chips supported by the lm driver include:

National Semiconductor LM78, LM78-J, LM79 and LM81.

Winbond W83627HF, W83627THF, W83627EHF, W83627DHG, W83637HF, W83697HF, W83781D, W83782D, W83783S, W83791D, W83791SD and W83792D.

ASUS AS99127F.

SEE ALSO
envsys(4), envstat(8)

HISTORY
The lm device appeared in NetBSD 1.5.

BUGS
Interrupt support is unimplemented.

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