feat: Added NetBSD man pages

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+.\"	$NetBSD: lm.4,v 1.38 2022/12/16 00:02:28 msaitoh Exp $
+.\"
+.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Bill Squier.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd December 15, 2022
+.Dt LM 4
+.Os
+.Sh NAME
+.Nm lm
+.Nd National Semiconductor LM78, LM79 and compatible hardware monitors
+.Sh SYNOPSIS
+.Cd "lm0 at isa? port 0x280 flags 0x00"
+.Cd "lm1 at isa? port 0x290 flags 0x00"
+.Cd "lm2 at isa? port 0x310 flags 0x00"
+.Cd "lm3 at isa? port 0xa00 flags 0x00"
+.Cd "lm0 at pnpbios0 index ? flags 0x00"
+.Cd "lm0 at iic? addr 0x2e flags 0x00"
+.Cd "lm* at wbsio?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the National Semiconductor
+LM series hardware monitors and register compatible chips to be used with
+the
+.Xr envsys 4
+API.
+.Pp
+The original LM78 hardware monitor supports 11 sensors:
+.Bl -column "Sensor" "Units" "Typical" -offset indent
+.It Sy "Sensor" Ta Sy "Units" Ta Sy "Typical Use"
+.It Li "IN0" Ta "uV DC" Ta "Core voltage"
+.It Li "IN1" Ta "uV DC" Ta "unknown"
+.It Li "IN2" Ta "uV DC" Ta "+3.3V"
+.It Li "IN3" Ta "uV DC" Ta "+5V"
+.It Li "IN4" Ta "uV DC" Ta "+12V"
+.It Li "IN5" Ta "uV DC" Ta "-12V"
+.It Li "IN6" Ta "uV DC" Ta "-5V"
+.It Li "Temp" Ta "uK" Ta "Motherboard Temperature"
+.It Li "Fan0" Ta "RPM" Ta "Fan"
+.It Li "Fan1" Ta "RPM" Ta "Chassis Fan"
+.It Li "Fan2" Ta "RPM" Ta "Fan"
+.El
+For other devices, sensors' names and numbers will be different.
+.Pp
+Due to hardware limitations, fresh sensor data is only available every
+2 seconds.
+.Sh HARDWARE
+Chips supported by the
+.Nm
+driver include:
+.Bl -item -offset indent
+.It
+National Semiconductor
+.Em LM78 ,
+.Em LM78-J ,
+.Em LM79 ,
+and
+.Em LM81 .
+.It
+Nuvoton
+.Em NCT5104D ,
+.Em NCT6775F ,
+.Em NCT6776F ,
+.Em NCT6102D ,
+.Em NCT6104D ,
+.Em NCT6106D ,
+.Em NCT6779D
+and
+.Em NCT679[12356789]D .
+.It
+Winbond
+.Em W83627HF* ,
+.Em W83627THF* ,
+.Em W83627EHF* ,
+.Em W83627DHG* ,
+.Em W83637HF* ,
+.Em W83697HF* ,
+.Em W83781D ,
+.Em W83782D* ,
+.Em W83783S* ,
+.Em W83791D* ,
+.Em W83791SD ,
+and
+.Em W83792D .
+.It
+ASUS
+.Em AS99127F .
+.El
+.Pp
+For most of the Winbond chips (identified with a * above), the
+.Em flags
+configuration option can be specified to select the type of temperature
+sensor:
+.Bl -column "flags" "Sensor Type" -offset indent
+.It Sy "flags" Ta Sy "Sensor Type"
+.It Li "0" Ta "Thermistor diode (Power-On default)"
+.It Li "1" Ta "Pentium-II diode"
+.It Li "2" Ta "2N3904 Bipolar"
+.It Li "4" Ta "Thermistor diode"
+.El
+.Sh SEE ALSO
+.Xr envsys 4 ,
+.Xr wbsio 4 ,
+.Xr envstat 8
+.Sh HISTORY
+The
+.Nm
+device appeared in
+.Nx 1.5 .
+.Sh CAVEATS
+Some vendors connect these chips to non-standard thermal diodes and
+resistors.
+This will result in bogus sensor values.
+.Sh BUGS
+Interrupt support is unimplemented.
+.Pp
+There are currently no known pnpbios IDs assigned to LM chips.