xref: /freebsd/sys/conf/NOTES (revision 0787f2b854f363a086e0d78d91e4bee9bda9130a)

#
# NOTES -- Lines that can be cut/pasted into kernel and hints configs.
#
# Lines that begin with 'device', 'options', 'machine', 'ident', 'maxusers',
# 'makeoptions', 'hints' etc go into the kernel configuration that you
# run config(8) with.
#
# Lines that begin with 'hints.' are NOT for config(8), they go into your
# hints file.  See /boot/device.hints and/or the 'hints' config(8) directive.
#
# Please use ``make LINT'' to create an old-style LINT file if you want to
# do kernel test-builds.
#
# $FreeBSD$
#

#
# This directive is mandatory; it defines the architecture to be
# configured for; in this case, the 386 family based IBM-PC and
# compatibles.
#
machine		i386

#
# This is the ``identification'' of the kernel.  Usually this should
# be the same as the name of your kernel.
#
ident		LINT

#
# The `maxusers' parameter controls the static sizing of a number of
# internal system tables by a complicated formula defined in param.c.
#
maxusers	10

#
# We want LINT to cover profiling as well
profile 	2

#
# The `makeoptions' parameter allows variables to be passed to the
# generated Makefile in the build area.
#
# CONF_CFLAGS gives some extra compiler flags that are added to ${CFLAGS}
# after most other flags.  Here we use it to inhibit use of non-optimal
# gcc builtin functions (e.g., memcmp).
#
# DEBUG happens to be magic.
# The following is equivalent to 'config -g KERNELNAME' and creates
# 'kernel.debug' compiled with -g debugging as well as a normal
# 'kernel'.  Use 'make install.debug' to install the debug kernel
# but that isn't normally necessary as the debug symbols are not loaded
# by the kernel and are not useful there anyway.
#
# KERNEL can be overridden so that you can change the default name of your
# kernel.
#
makeoptions	CONF_CFLAGS=-fno-builtin  #Don't allow use of memcmp, etc.
#makeoptions	DEBUG=-g		#Build kernel with gdb(1) debug symbols
#makeoptions	KERNEL=foo		#Build kernel "foo" and install "/foo"

#
# Certain applications can grow to be larger than the 512M limit
# that FreeBSD initially imposes.  Below are some options to
# allow that limit to grow to 1GB, and can be increased further
# with changing the parameters.  MAXDSIZ is the maximum that the
# limit can be set to, and the DFLDSIZ is the default value for
# the limit.  You might want to set the default lower than the
# max, and explicitly set the maximum with a shell command for processes
# that regularly exceed the limit like INND.
#
options 	MAXDSIZ="(1024UL*1024*1024)"
options 	DFLDSIZ="(1024UL*1024*1024)"

#
# BLKDEV_IOSIZE sets the default block size used in user block
# device I/O.  Note that this value will be overriden by the label
# when specifying a block device from a label with a non-0
# partition blocksize.  The default is PAGE_SIZE.
#
options 	BLKDEV_IOSIZE=8192

# Options for the VM subsystem
options 	PQ_CACHESIZE=512	# color for 512k/16k cache
# Deprecated options supported for backwards compatibility
#options 	PQ_NOOPT		# No coloring
#options 	PQ_LARGECACHE		# color for 512k/16k cache
#options 	PQ_HUGECACHE		# color for 1024k/16k cache
#options 	PQ_MEDIUMCACHE		# color for 256k/16k cache
#options 	PQ_NORMALCACHE		# color for 64k/16k cache

# This allows you to actually store this configuration file into
# the kernel binary itself, where it may be later read by saying:
#    strings -n 3 /kernel | sed -n 's/^___//p' > MYKERNEL
#
options 	INCLUDE_CONFIG_FILE     # Include this file in kernel

#
# The root device and filesystem type can be compiled in;
# this provides a fallback option if the root device cannot
# be correctly guesst by the bootstrap code, or an override if
# the RB_DFLTROOT flag (-r) is specified when booting the kernel.
#
options 	ROOTDEVNAME=\"ufs:da0s2e\"


#####################################################################
# SMP OPTIONS:
#
# SMP enables building of a Symmetric MultiProcessor Kernel.
# APIC_IO enables the use of the IO APIC for Symmetric I/O.
#
# Notes:
#
#  An SMP kernel will ONLY run on an Intel MP spec. qualified motherboard.
#
#  Be sure to disable 'cpu I386_CPU' && 'cpu I486_CPU' for SMP kernels.
#
#  Check the 'Rogue SMP hardware' section to see if additional options
#   are required by your hardware.
#

# Mandatory:
options 	SMP			# Symmetric MultiProcessor Kernel
options 	APIC_IO			# Symmetric (APIC) I/O

#
# Rogue SMP hardware:
#

# Bridged PCI cards:
#
# The MP tables of most of the current generation MP motherboards
#  do NOT properly support bridged PCI cards.  To use one of these
#  cards you should refer to ???

# SMP Debugging Options:
#
# MUTEX_DEBUG enables various extra assertions in the mutex code.
# WITNESS enables the mutex witness code which detects deadlocks and cycles
#         during locking operations.
# WITNESS_DDB causes the witness code to drop into the kernel debugger if
#	  a lock heirarchy violation occurs or if locks are held when going to
#	  sleep.
# WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
options 	MUTEX_DEBUG
options 	WITNESS
options 	WITNESS_DDB
options 	WITNESS_SKIPSPIN


#####################################################################
# CPU OPTIONS

#
# You must specify at least one CPU (the one you intend to run on);
# deleting the specification for CPUs you don't need to use may make
# parts of the system run faster.
# I386_CPU is mutually exclusive with the other CPU types.
#
#cpu		I386_CPU
cpu		I486_CPU
cpu		I586_CPU		# aka Pentium(tm)
cpu		I686_CPU		# aka Pentium Pro(tm)

#
# Options for CPU features.
#
# CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
# BlueLightning CPU.  It works only with Cyrix FPU, and this option
# should not be used with Intel FPU.
#
# CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
# CPU if CPU supports it. The default is double-clock mode on
# BlueLightning CPU box.
#
# CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
#
# CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
# mapped mode.  Default is 2-way set associative mode.
#
# CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
# of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
# Otherwise, the NO_LOCK bit of CCR1 is cleared.  (NOTE 3)
#
# CPU_DISABLE_5X86_LSSER disables load store serialize (i.e. enables
# reorder).  This option should not be used if you use memory mapped
# I/O device(s).
#
# CPU_FASTER_5X86_FPU enables faster FPU exception handler.
#
# CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
# for i386 machines.
#
# CPU_IORT defines I/O clock delay time (NOTE 1).  Default values of
# I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
# (no clock delay).
#
# CPU_L2_LATENCY specifed the L2 cache latency value.  This option is used
# only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
# The default value is 5.
#
# CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
# of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
# 1).
#
# CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs.  This option
# is useful when you use Socket 8 to Socket 370 converter, because most Pentium
# Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
#
# CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
#
# CPU_SUSP_HLT enables suspend on HALT.  If this option is set, CPU
# enters suspend mode following execution of HALT instruction.
#
# CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
# K5/K6/K6-2 cpus.
#
# CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
# flush at hold state.
#
# CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
# without cache flush at hold state, and (2) write-back CPU cache on
# Cyrix 6x86 whose revision < 2.7 (NOTE 2).
#
# NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
# Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
# executed.  This option is only needed if I586_CPU is also defined,
# and should be included for any non-Pentium CPU that defines it.
#
# NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
# which indicates that the 15-16MB range is *definitely* not being
# occupied by an ISA memory hole.
#
# NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
# CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
# These options may crash your system.
#
# NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
# in write-through mode when revision < 2.7.  If revision of Cyrix
# 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
#
# NOTE 3: This option may cause failures for software that requires
# locked cycles in order to operate correctly.
#
options 	CPU_BLUELIGHTNING_FPU_OP_CACHE
options 	CPU_BLUELIGHTNING_3X
options 	CPU_BTB_EN
options 	CPU_DIRECT_MAPPED_CACHE
options 	CPU_DISABLE_5X86_LSSER
options 	CPU_FASTER_5X86_FPU
options 	CPU_I486_ON_386
options 	CPU_IORT
options 	CPU_L2_LATENCY=5
options 	CPU_LOOP_EN
options 	CPU_PPRO2CELERON
options 	CPU_RSTK_EN
options 	CPU_SUSP_HLT
options 	CPU_WT_ALLOC
options 	CYRIX_CACHE_WORKS
options 	CYRIX_CACHE_REALLY_WORKS
#options 	NO_F00F_HACK

#
# A math emulator is mandatory if you wish to run on hardware which
# does not have a floating-point processor.  Pick either the original,
# bogus (but freely-distributable) math emulator, or a much more
# fully-featured but GPL-licensed emulator taken from Linux.
#
options 	MATH_EMULATE		#Support for x87 emulation
# Don't enable both of these in a real config.
options 	GPL_MATH_EMULATE	#Support for x87 emulation via
					#new math emulator


#####################################################################
# COMPATIBILITY OPTIONS

#
# Implement system calls compatible with 4.3BSD and older versions of
# FreeBSD.  You probably do NOT want to remove this as much current code
# still relies on the 4.3 emulation.
#
options 	COMPAT_43

#
# These three options provide support for System V Interface
# Definition-style interprocess communication, in the form of shared
# memory, semaphores, and message queues, respectively.
#
options 	SYSVSHM
options 	SYSVSEM
options 	SYSVMSG


#####################################################################
# DEBUGGING OPTIONS

#
# Enable the kernel debugger.
#
options 	DDB

#
# Don't drop into DDB for a panic. Intended for unattended operation
# where you may want to drop to DDB from the console, but still want
# the machine to recover from a panic
#
options 	DDB_UNATTENDED

#
# If using GDB remote mode to debug the kernel, there's a non-standard
# extension to the remote protocol that can be used to use the serial
# port as both the debugging port and the system console.  It's non-
# standard and you're on your own if you enable it.  See also the
# "remotechat" variables in the FreeBSD specific version of gdb.
#
options 	GDB_REMOTE_CHAT

#
# KTRACE enables the system-call tracing facility ktrace(2).
#
options 	KTRACE			#kernel tracing

#
# KTR is a kernel tracing mechanism imported from BSD/OS.  Currently it
# has no userland interface aside from a few sysctl's.  It is enabled with
# the KTR option.  The KTR_EXTEND option causes trace events to be generated
# as a string from snprintf rather than as a string and up to 5 argument
# pointers.  KTR_ENTRIES defines the number of entries in the circular trace
# buffer.  KTR_COMPILE defines the mask of events to compile into the kernel
# as defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
# initial value of the ktr_mask variable which determines at runtime what
# events to trace.  KTR_CPUMASK determines which CPU's log events, with
# bit X corresponding to cpu X.  KTR_VERBOSE enables dumping of KTR events
# to the console by default.  This functionality can be toggled via the
# debug.ktr_verbose sysctl and defaults to off if KTR_VERBOSE is not defined.
#
options 	KTR
options 	KTR_EXTEND
options 	KTR_ENTRIES=1024
options 	KTR_COMPILE=0x3fffff
options 	KTR_MASK=0x201208
options 	KTR_CPUMASK=0x3
options 	KTR_VERBOSE

#
# The INVARIANTS option is used in a number of source files to enable
# extra sanity checking of internal structures.  This support is not
# enabled by default because of the extra time it would take to check
# for these conditions, which can only occur as a result of
# programming errors.
#
options 	INVARIANTS

#
# The INVARIANT_SUPPORT option makes us compile in support for
# verifying some of the internal structures.  It is a prerequisite for
# 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
# called.  The intent is that you can set 'INVARIANTS' for single
# source files (by changing the source file or specifying it on the
# command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
# wish to build a kernel module with 'INVARIANTS', then adding
# 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
# infrastructure without the added overhead.
#
options 	INVARIANT_SUPPORT

#
# The DIAGNOSTIC option is used to enable extra debugging information
# from some parts of the kernel.  As this makes everything more noisy,
# it is disabled by default.
#
options 	DIAGNOSTIC

#
# PERFMON causes the driver for Pentium/Pentium Pro performance counters
# to be compiled.  See perfmon(4) for more information.
#
options 	PERFMON


#
# This option let some drivers co-exist that can't co-exist in a running
# system.  This is used to be able to compile all kernel code in one go for
# quality assurance purposes (like this file, which the option takes it name
# from.)
#
options 	COMPILING_LINT


# XXX - this doesn't belong here.
# Allow ordinary users to take the console - this is useful for X.
options 	UCONSOLE

# XXX - this doesn't belong here either
options 	USERCONFIG		#boot -c editor
options 	INTRO_USERCONFIG	#imply -c and show intro screen
options 	VISUAL_USERCONFIG	#visual boot -c editor

#####################################################################
# NETWORKING OPTIONS

#
# Protocol families:
#  Only the INET (Internet) family is officially supported in FreeBSD.
#  Source code for the NS (Xerox Network Service) is provided for amusement
#  value.
#
options 	INET			#Internet communications protocols
options 	INET6			#IPv6 communications protocols
options 	IPSEC			#IP security
options 	IPSEC_ESP		#IP security (crypto; define w/ IPSEC)
options 	IPSEC_DEBUG		#debug for IP security

options 	IPX			#IPX/SPX communications protocols
options 	IPXIP			#IPX in IP encapsulation (not available)
options 	IPTUNNEL		#IP in IPX encapsulation (not available)

options 	NCP			#NetWare Core protocol

options 	NETATALK		#Appletalk communications protocols
options 	NETATALKDEBUG		#Appletalk debugging

# These are currently broken but are shipped due to interest.
#options 	NS			#Xerox NS protocols
#options 	NSIP			#XNS over IP

# mchain library. It can be either loaded as KLD or compiled into kernel
options 	LIBMCHAIN

# netgraph(4). Enable the base netgraph code with the NETGRAPH option.
# Individual node types can be enabled with the corresponding option
# listed below; however, this is not strictly necessary as netgraph
# will automatically load the corresponding KLD module if the node type
# is not already compiled into the kernel. Each type below has a
# corresponding man page, e.g., ng_async(8).
options 	NETGRAPH		#netgraph(4) system
options 	NETGRAPH_ASYNC
options 	NETGRAPH_BPF
options 	NETGRAPH_CISCO
options 	NETGRAPH_ECHO
options 	NETGRAPH_ETHER
options 	NETGRAPH_FRAME_RELAY
options 	NETGRAPH_HOLE
options 	NETGRAPH_IFACE
options 	NETGRAPH_KSOCKET
options 	NETGRAPH_LMI
# MPPC compression requires proprietary files (not included)
#options 	NETGRAPH_MPPC_COMPRESSION
options 	NETGRAPH_MPPC_ENCRYPTION
options 	NETGRAPH_ONE2MANY
options 	NETGRAPH_PPP
options 	NETGRAPH_PPPOE
options 	NETGRAPH_PPTPGRE
options 	NETGRAPH_RFC1490
options 	NETGRAPH_SOCKET
options 	NETGRAPH_TEE
options 	NETGRAPH_TTY
options 	NETGRAPH_UI
options 	NETGRAPH_VJC

device		mn	# Munich32x/Falc54 Nx64kbit/sec cards.
device		lmc	# tulip based LanMedia WAN cards
device		musycc	# LMC/SBE LMC1504 quad T1/E1

#
# Network interfaces:
#  The `loop' device is MANDATORY when networking is enabled.
#  The `ether' device provides generic code to handle
#  Ethernets; it is MANDATORY when a Ethernet device driver is
#  configured or token-ring is enabled.
#  The 'fddi' device provides generic code to support FDDI.
#  The `sppp' device serves a similar role for certain types
#  of synchronous PPP links (like `cx', `ar').
#  The `sl' device implements the Serial Line IP (SLIP) service.
#  The `ppp' device implements the Point-to-Point Protocol.
#  The `bpf' device enables the Berkeley Packet Filter.  Be
#  aware of the legal and administrative consequences of enabling this
#  option.  The number of devices determines the maximum number of
#  simultaneous BPF clients programs runnable.
#  The `disc' device implements a minimal network interface,
#  which throws away all packets sent and never receives any.  It is
#  included for testing purposes.  This shows up as the 'ds' interface.
#  The `tap' device is a pty-like virtual Ethernet interface
#  The `tun' device implements (user-)ppp and nos-tun
#  The `gif' device implements IPv6 over IP4 tunneling,
#  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
#  IPv6 over IPv6 tunneling.
#  The XBONEHACK option allows the same pair of addresses to be configured on
#  multiple gif interfaces.
#  The `faith' device captures packets sent to it and diverts them
#  to the IPv4/IPv6 translation daemon.
#  The `stf' device implements 6to4 encapsulation.
#  The `ef' device provides support for multiple ethernet frame types
#  specified via ETHER_* options. See ef(4) for details.
#
# The PPP_BSDCOMP option enables support for compress(1) style entire
# packet compression, the PPP_DEFLATE is for zlib/gzip style compression.
# PPP_FILTER enables code for filtering the ppp data stream and selecting
# events for resetting the demand dial activity timer - requires bpf.
# See pppd(8) for more details.
#
device		ether			#Generic Ethernet
device		vlan	1		#VLAN support
device		token			#Generic TokenRing
device		fddi			#Generic FDDI
device		sppp			#Generic Synchronous PPP
device		loop	1		#Network loopback device
device		bpf			#Berkeley packet filter
device		disc			#Discard device (ds0, ds1, etc)
device		tap			#Virtual Ethernet driver
device		tun			#Tunnel driver (ppp(8), nos-tun(8))
device		sl			#Serial Line IP
device		ppp	2		#Point-to-point protocol
options 	PPP_BSDCOMP		#PPP BSD-compress support
options 	PPP_DEFLATE		#PPP zlib/deflate/gzip support
options 	PPP_FILTER		#enable bpf filtering (needs bpf)

device		ef			# Multiple ethernet frames support
options 	ETHER_II		# enable Ethernet_II frame
options 	ETHER_8023		# enable Ethernet_802.3 (Novell) frame
options 	ETHER_8022		# enable Ethernet_802.2 frame
options 	ETHER_SNAP		# enable Ethernet_802.2/SNAP frame

# for IPv6
device		gif	4		#IPv6 and IPv4 tunneling
options 	XBONEHACK
device		faith	1		#for IPv6 and IPv4 translation
device		stf			#6to4 IPv6 over IPv4 encapsulation

#
# Internet family options:
#
# TCP_COMPAT_42 causes the TCP code to emulate certain bugs present in
# 4.2BSD.  This option should not be used unless you have a 4.2BSD
# machine and TCP connections fail.
#
# MROUTING enables the kernel multicast packet forwarder, which works
# with mrouted(8).
#
# IPFIREWALL enables support for IP firewall construction, in
# conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
# logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
# limits the number of times a matching entry can be logged.
#
# WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
# and if you do not add other rules during startup to allow access,
# YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
# in /etc/rc.conf when first enabling this feature, then refining the
# firewall rules in /etc/rc.firewall after you've tested that the new kernel
# feature works properly.
#
# IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
# allow everything.  Use with care, if a cracker can crash your
# firewall machine, they can get to your protected machines.  However,
# if you are using it as an as-needed filter for specific problems as
# they arise, then this may be for you.  Changing the default to 'allow'
# means that you won't get stuck if the kernel and /sbin/ipfw binary get
# out of sync.
#
# IPDIVERT enables the divert IP sockets, used by ``ipfw divert''
#
# IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
# packets without touching the ttl).  This can be useful to hide firewalls
# from traceroute and similar tools.
#
# TCPDEBUG is undocumented.
#
options 	TCP_COMPAT_42		#emulate 4.2BSD TCP bugs
options 	MROUTING		# Multicast routing
options 	IPFIREWALL		#firewall
options 	IPFIREWALL_VERBOSE	#print information about
					# dropped packets
options 	IPFIREWALL_FORWARD	#enable transparent proxy support
options 	IPFIREWALL_VERBOSE_LIMIT=100	#limit verbosity
options 	IPFIREWALL_DEFAULT_TO_ACCEPT	#allow everything by default
options 	IPV6FIREWALL		#firewall for IPv6
options 	IPV6FIREWALL_VERBOSE
options 	IPV6FIREWALL_VERBOSE_LIMIT=100
options 	IPV6FIREWALL_DEFAULT_TO_ACCEPT
options 	IPDIVERT		#divert sockets
options 	IPFILTER		#ipfilter support
options 	IPFILTER_LOG		#ipfilter logging
options 	IPFILTER_DEFAULT_BLOCK	#block all packets by default
options 	IPSTEALTH		#support for stealth forwarding
options 	TCPDEBUG

# Statically Link in accept filters
options		ACCEPT_FILTER_DATA
options		ACCEPT_FILTER_HTTP

# The following options add sysctl variables for controlling how certain
# TCP packets are handled.
#
# TCP_DROP_SYNFIN adds support for ignoring TCP packets with SYN+FIN. This
# prevents nmap et al. from identifying the TCP/IP stack, but breaks support
# for RFC1644 extensions and is not recommended for web servers.
#
# TCP_RESTRICT_RST adds support for blocking the emission of TCP RST packets.
# This is useful on systems which are exposed to SYN floods (e.g. IRC servers)
# or any system which one does not want to be easily portscannable.
#
options 	TCP_DROP_SYNFIN		#drop TCP packets with SYN+FIN
options 	TCP_RESTRICT_RST	#restrict emission of TCP RST

# DUMMYNET enables the "dummynet" bandwidth limiter. You need
# IPFIREWALL as well. See the dummynet(4) manpage for more info.
# BRIDGE enables bridging between ethernet cards -- see bridge(4).
# You can use IPFIREWALL and dummynet together with bridging.
options 	DUMMYNET
options 	BRIDGE

#
# ATM (HARP version) options
#
# ATM_CORE includes the base ATM functionality code.  This must be included
#	for ATM support.
#
# ATM_IP includes support for running IP over ATM.
#
# At least one (and usually only one) of the following signalling managers
# must be included (note that all signalling managers include PVC support):
# ATM_SIGPVC includes support for the PVC-only signalling manager `sigpvc'.
# ATM_SPANS includes support for the `spans' signalling manager, which runs
#	the FORE Systems's proprietary SPANS signalling protocol.
# ATM_UNI includes support for the `uni30' and `uni31' signalling managers,
#	which run the ATM Forum UNI 3.x signalling protocols.
#
# The `hea' driver provides support for the Efficient Networks, Inc.
# ENI-155p ATM PCI Adapter.
#
# The `hfa' driver provides support for the FORE Systems, Inc.
# PCA-200E ATM PCI Adapter.
#
options 	ATM_CORE		#core ATM protocol family
options 	ATM_IP			#IP over ATM support
options 	ATM_SIGPVC		#SIGPVC signalling manager
options 	ATM_SPANS		#SPANS signalling manager
options 	ATM_UNI			#UNI signalling manager
device		hea			#Efficient ENI-155p ATM PCI
device		hfa			#FORE PCA-200E ATM PCI


#####################################################################
# FILESYSTEM OPTIONS

#
# Only the root, /usr, and /tmp filesystems need be statically
# compiled; everything else will be automatically loaded at mount
# time.  (Exception: the UFS family---FFS, and MFS --- cannot
# currently be demand-loaded.)  Some people still prefer to statically
# compile other filesystems as well.
#
# NB: The NULL, PORTAL, UMAP and UNION filesystems are known to be
# buggy, and WILL panic your system if you attempt to do anything with
# them.  They are included here as an incentive for some enterprising
# soul to sit down and fix them.
#

# One of these is mandatory:
options 	FFS			#Fast filesystem
options 	MFS			#Memory File System
options 	NFS			#Network File System

# The rest are optional:
#options 	NFS_NOSERVER		#Disable the NFS-server code.
options 	CD9660			#ISO 9660 filesystem
options 	FDESC			#File descriptor filesystem
options 	HPFS			#OS/2 File system
options 	MSDOSFS			#MS DOS File System (FAT, FAT32)
options 	NTFS			#NT File System
options 	NULLFS			#NULL filesystem
options 	NWFS			#NetWare filesystem
options 	PORTAL			#Portal filesystem
options 	PROCFS			#Process filesystem
options 	UMAPFS			#UID map filesystem
options 	UNION			#Union filesystem
options 	DEVFS			#devices filesystem
# The xFS_ROOT options REQUIRE the associated ``options xFS''
options 	NFS_ROOT		#NFS usable as root device
# This code enables IFS, an FFS which exports inodes as the namespace.
# You can find details in src/sys/ufs/ifs/README .
options		IFS

# Soft updates is a technique for improving file system speed and
# making abrupt shutdown less risky.
#
options 	SOFTUPDATES

# Extended attributes allow additional data to be associated with files,
# and is used for ACLs, Capabilities, and MAC labels
#
options	FFS_EXTATTR

# Make space in the kernel for a root filesystem on a md device.
# Define to the number of kilobytes to reserve for the filesystem.
options 	MD_ROOT_SIZE=10

# Make the md device a potential root device, either with preloaded
# images of type mfs_root or md_root.
options 	MD_ROOT

# Specify double the default maximum size for malloc(9)-backed md devices.
options 	MD_NSECT=40000

# Allow this many swap-devices.
#
# In order to manage swap, the system must reserve bitmap space that
# scales with the largest mounted swap device multiplied by NSWAPDEV,
# irregardless of whether other swap devices exist or not.  So it
# is not a good idea to make this value too large.
options 	NSWAPDEV=5

# Disk quotas are supported when this option is enabled.
options 	QUOTA			#enable disk quotas

# If you are running a machine just as a fileserver for PC and MAC
# users, using SAMBA or Netatalk, you may consider setting this option
# and keeping all those users' directories on a filesystem that is
# mounted with the suiddir option. This gives new files the same
# ownership as the directory (similar to group). It's a security hole
# if you let these users run programs, so confine it to file-servers
# (but it'll save you lots of headaches in those cases). Root owned
# directories are exempt and X bits are cleared. The suid bit must be
# set on the directory as well; see chmod(1) PC owners can't see/set
# ownerships so they keep getting their toes trodden on. This saves
# you all the support calls as the filesystem it's used on will act as
# they expect: "It's my dir so it must be my file".
#
options 	SUIDDIR

# NFS options:
options 	NFS_MINATTRTIMO=3	# VREG attrib cache timeout in sec
options 	NFS_MAXATTRTIMO=60
options 	NFS_MINDIRATTRTIMO=30	# VDIR attrib cache timeout in sec
options 	NFS_MAXDIRATTRTIMO=60
options 	NFS_GATHERDELAY=10	# Default write gather delay (msec)
options 	NFS_UIDHASHSIZ=29	# Tune the size of nfssvc_sock with this
options 	NFS_WDELAYHASHSIZ=16	# and with this
options 	NFS_MUIDHASHSIZ=63	# Tune the size of nfsmount with this
options 	NFS_DEBUG		# Enable NFS Debugging

# Coda stuff:
options 	CODA			#CODA filesystem.
device		vcoda	4		#coda minicache <-> venus comm.

#
# Add support for the EXT2FS filesystem of Linux fame.  Be a bit
# careful with this - the ext2fs code has a tendency to lag behind
# changes and not be exercised very much, so mounting read/write could
# be dangerous (and even mounting read only could result in panics.)
#
options 	EXT2FS

# Use real implementations of the aio_* system calls.  There are numerous
# stability issues in the current aio code that make it unsuitable for
# inclusion on shell boxes.
options 	VFS_AIO

# Enable the code UFS IO optimization through the VM system.  This allows
# use VM operations instead of copying operations when possible.
#
# Even with this enabled, actual use of the code is still controlled by the
# sysctl vfs.ioopt.  0 gives no optimization, 1 gives normal (use VM
# operations if a request happens to fit), 2 gives agressive optimization
# (the operations are split to do as much as possible through the VM system.)
#
# Enabling this will probably not give an overall speedup except for
# special workloads.
options 	ENABLE_VFS_IOOPT

# Cryptographically secure random number generator; /dev/[u]random
device		random


#####################################################################
# POSIX P1003.1B

# Real time extensions added in the 1993 Posix
# P1003_1B: Infrastructure
# _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
# _KPOSIX_VERSION:             Version kernel is built for

options 	P1003_1B
options 	_KPOSIX_PRIORITY_SCHEDULING
options 	_KPOSIX_VERSION=199309L


#####################################################################
# CLOCK OPTIONS

# The granularity of operation is controlled by the kernel option HZ whose
# default value (100) means a granularity of 10ms.  For an accurate simulation
# of high data rates it might be necessary to reduce the timer granularity to
# 1ms or less.  Consider, however, that some interfaces using programmed I/O
# may require a considerable time to output packets.  So, reducing the
# granularity too much might actually cause ticks to be missed thus reducing
# the accuracy of operation.

options 	HZ=100

# Other clock options

options 	CLK_CALIBRATION_LOOP
options 	CLK_USE_I8254_CALIBRATION
options 	CLK_USE_TSC_CALIBRATION


#####################################################################
# SCSI DEVICES

# SCSI DEVICE CONFIGURATION

# The SCSI subsystem consists of the `base' SCSI code, a number of
# high-level SCSI device `type' drivers, and the low-level host-adapter
# device drivers.  The host adapters are listed in the ISA and PCI
# device configuration sections below.
#
# Beginning with FreeBSD 2.0.5 you can wire down your SCSI devices so
# that a given bus, target, and LUN always come on line as the same
# device unit.  In earlier versions the unit numbers were assigned
# in the order that the devices were probed on the SCSI bus.  This
# means that if you removed a disk drive, you may have had to rewrite
# your /etc/fstab file, and also that you had to be careful when adding
# a new disk as it may have been probed earlier and moved your device
# configuration around.

# This old behavior is maintained as the default behavior.  The unit
# assignment begins with the first non-wired down unit for a device
# type.  For example, if you wire a disk as "da3" then the first
# non-wired disk will be assigned da4.

# The syntax for wiring down devices is:

hint.scbus.0.at="ahc0"
hint.scbus.1.at="ahc1"
hint.scbus.1.bus="0"
hint.scbus.3.at="ahc2"
hint.scbus.3.bus="0"
hint.scbus.2.at="ahc2"
hint.scbus.2.bus="1"
hint.da.0.at="scbus0"
hint.da.0.target="0"
hint.da.0.unit="0"
hint.da.1.at="scbus3"
hint.da.1.target="1"
hint.da.2.at="scbus2"
hint.da.2.target="3"
hint.sa.1.at="scbus1"
hint.sa.1.target="6"

# "units" (SCSI logical unit number) that are not specified are
# treated as if specified as LUN 0.

# All SCSI devices allocate as many units as are required.

# The ch driver drives SCSI Media Changer ("jukebox") devices.
#
# The da driver drives SCSI Direct Access ("disk") and Optical Media
# ("WORM") devices.
#
# The sa driver drives SCSI Sequential Access ("tape") devices.
#
# The cd driver drives SCSI Read Only Direct Access ("cd") devices.
#
# The ses driver drives SCSI Envinronment Services ("ses") and
# SAF-TE ("SCSI Accessable Fault-Tolerant Enclosure") devices.
#
# The pt driver drives SCSI Processor devices.
#
#
# Target Mode support is provided here but also requires that a SIM
# (SCSI Host Adapter Driver) provide support as well.
#
# The targ driver provides target mode support as a Processor type device.
# It exists to give the minimal context necessary to respond to Inquiry
# commands. There is a sample user application that shows how the rest
# of the command support might be done in /usr/share/examples/scsi_target.
#
# The targbh driver provides target mode support and exists to respond
# to incoming commands that do not otherwise have a logical unit assigned
# to them.
#
# The "unknown" device (uk? in pre-2.0.5) is now part of the base SCSI
# configuration as the "pass" driver.

device		scbus		#base SCSI code
device		ch		#SCSI media changers
device		da		#SCSI direct access devices (aka disks)
device		sa		#SCSI tapes
device		cd		#SCSI CD-ROMs
device		ses		#SCSI Environmental Services (and SAF-TE)
device		pt		#SCSI processor
device		targ		#SCSI Target Mode Code
device		targbh		#SCSI Target Mode Blackhole Device
device		pass		#CAM passthrough driver

# CAM OPTIONS:
# debugging options:
# -- NOTE --  If you specify one of the bus/target/lun options, you must
#             specify them all!
# CAMDEBUG: When defined enables debugging macros
# CAM_DEBUG_BUS:  Debug the given bus.  Use -1 to debug all busses.
# CAM_DEBUG_TARGET:  Debug the given target.  Use -1 to debug all targets.
# CAM_DEBUG_LUN:  Debug the given lun.  Use -1 to debug all luns.
# CAM_DEBUG_FLAGS:  OR together CAM_DEBUG_INFO, CAM_DEBUG_TRACE,
#                   CAM_DEBUG_SUBTRACE, and CAM_DEBUG_CDB
#
# CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
# SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
# SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
# SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
#             queue after a bus reset, and the number of milliseconds to
#             freeze the device queue after a bus device reset.
options 	CAMDEBUG
options 	CAM_DEBUG_BUS=-1
options 	CAM_DEBUG_TARGET=-1
options 	CAM_DEBUG_LUN=-1
options 	CAM_DEBUG_FLAGS="CAM_DEBUG_INFO|CAM_DEBUG_TRACE|CAM_DEBUG_CDB"
options 	CAM_MAX_HIGHPOWER=4
options 	SCSI_NO_SENSE_STRINGS
options 	SCSI_NO_OP_STRINGS
options 	SCSI_DELAY=8000	# Be pessimistic about Joe SCSI device

# Options for the CAM CDROM driver:
# CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
# CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
#                           enforced if there is I/O waiting for another LUN
# The compiled in defaults for these variables are 2 and 10 seconds,
# respectively.
#
# These can also be changed on the fly with the following sysctl variables:
# kern.cam.cd.changer.min_busy_seconds
# kern.cam.cd.changer.max_busy_seconds
#
options 	CHANGER_MIN_BUSY_SECONDS=2
options 	CHANGER_MAX_BUSY_SECONDS=10

# Options for the CAM sequential access driver:
# SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
# SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
# SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
# SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
options 	SA_SPACE_TIMEOUT="(60)"
options 	SA_REWIND_TIMEOUT="(2*60)"
options 	SA_ERASE_TIMEOUT="(4*60)"
options 	SA_1FM_AT_EOD

# Optional timeout for the CAM processor target (pt) device
# This is specified in seconds.  The default is 60 seconds.
options 	SCSI_PT_DEFAULT_TIMEOUT="60"

# Optional enable of doing SES passthrough on other devices (e.g., disks)
#
# Normally disabled because a lot of newer SCSI disks report themselves
# as having SES capabilities, but this can then clot up attempts to build
# build a topology with the SES device that's on the box these drives
# are in....
options		SES_ENABLE_PASSTHROUGH


#####################################################################
# MISCELLANEOUS DEVICES AND OPTIONS

# The `pty' device usually turns out to be ``effectively mandatory'',
# as it is required for `telnetd', `rlogind', `screen', `emacs', and
# `xterm', among others.

device		pty		#Pseudo ttys
device		speaker		#Play IBM BASIC-style noises out your speaker
device		gzip		#Exec gzipped a.out's
device		vn		#Vnode driver (turns a file into a device)
device		md		#Memory/malloc disk
device		snp		#Snoop device - to look at pty/vty/etc..
device		ccd	4	#Concatenated disk driver

# Configuring Vinum into the kernel is not necessary, since the kld
# module gets started automatically when vinum(8) starts.  This
# device is also untested.  Use at your own risk.
#
# The option VINUMDEBUG must match the value set in CFLAGS
# in src/sbin/vinum/Makefile.  Failure to do so will result in
# the following message from vinum(8):
#
# Can't get vinum config: Invalid argument
#
# see vinum(4) for more reasons not to use these options.
device		vinum		#Vinum concat/mirror/raid driver
options 	VINUMDEBUG	#enable Vinum debugging hooks

# Size of the kernel message buffer.  Should be N * pagesize.
options 	MSGBUF_SIZE=40960


#####################################################################
# HARDWARE BUS CONFIGURATION

# ISA, EISA, MCA and PCI bus:

#
# Mandatory ISA devices: isa, npx
#
device		isa

#
# Options for `isa':
#
# AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
# interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
# This option breaks suspend/resume on some portables.
#
# AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
# interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
# Automatic EOI is documented not to work for for the slave with the
# original i8259A, but it works for some clones and some integrated
# versions.
#
# MAXMEM specifies the amount of RAM on the machine; if this is not
# specified, FreeBSD will first read the amount of memory from the CMOS
# RAM, so the amount of memory will initially be limited to 64MB or 16MB
# depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
# then attempt to detect the installed amount of RAM.  If this probe
# fails to detect >64MB RAM you will have to use the MAXMEM option.
# The amount is in kilobytes, so for a machine with 128MB of RAM, it would
# be 131072 (128 * 1024).
#
# BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
# reset the CPU for reboot.  This is needed on some systems with broken
# keyboard controllers.

options 	COMPAT_OLDISA	#Use ISA shims and glue for old drivers
options 	AUTO_EOI_1
#options 	AUTO_EOI_2

options 	MAXMEM="(128*1024)"
#options 	BROKEN_KEYBOARD_RESET

# Enable support for the kernel PLL to use an external PPS signal,
# under supervision of [x]ntpd(8)
# More info in ntpd documentation: http://www.eecis.udel.edu/~ntp

options 	PPS_SYNC

# If you see the "calcru: negative time of %ld usec for pid %d (%s)\n"
# message you probably have some broken sw/hw which disables interrupts
# for too long.  You can make the system more resistant to this by
# choosing a high value for NTIMECOUNTER.  The default is 5, there
# is no upper limit but more than a couple of hundred are not productive.
# A better strategy may be to sysctl -w kern.timecounter.method=1

options 	NTIMECOUNTER=20

#
# EISA bus
#
# The EISA bus device is `eisa'.  It provides auto-detection and
# configuration support for all devices on the EISA bus.

device		eisa

# By default, only 10 EISA slots are probed, since the slot numbers
# above clash with the configuration address space of the PCI subsystem,
# and the EISA probe is not very smart about this.  This is sufficient
# for most machines, but in particular the HP NetServer LC series comes
# with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
# thus you need to bump this figure to 12 for them.
options 	EISA_SLOTS=12

#
# MCA bus:
#
# The MCA bus device is `mca'.  It provides auto-detection and
# configuration support for all devices on the MCA bus.
# No hints are required for MCA.

device		mca

#
# PCI bus & PCI options:
#
# The main PCI bus device is `pci'.  It provides auto-detection and
# configuration support for all devices on the PCI bus, using either
# configuration mode defined in the PCI specification.

device		pci

#
# AGP GART support
device		agp

# PCI options
#
#options 	PCI_QUIET	#quiets PCI code on chipset settings


#####################################################################
# HARDWARE DEVICE CONFIGURATION

# EISA support is available for some device, so they can be auto-probed.
# MicroChannel (MCA) support is available for some devices.
# For ISA the required hints are listed.
# EISA, MCA, PCI and pccard are self identifying buses, so no hints
# are needed.

#
# Mandatory devices:
#

# The keyboard controller; it controls the keyboard and the PS/2 mouse.
device		atkbdc	1
hint.atkbdc.0.at="isa"
hint.atkbdc.0.port="0x060"

# The AT keyboard
device		atkbd
hint.atkbd.0.at="atkbdc"
hint.atkbd.0.irq="1"

# Options for atkbd:
options 	ATKBD_DFLT_KEYMAP	# specify the built-in keymap
makeoptions	ATKBD_DFLT_KEYMAP="jp.106"

# These options are valid for other keyboard drivers as well.
options 	KBD_DISABLE_KEYMAP_LOAD	# refuse to load a keymap
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev

# `flags' for atkbd:
#       0x01    Force detection of keyboard, else we always assume a keyboard
#       0x02    Don't reset keyboard, useful for some newer ThinkPads
#       0x04    Old-style (XT) keyboard support, useful for older ThinkPads

# PS/2 mouse
device		psm
hint.psm.0.at="atkbdc"
hint.psm.0.irq="12"

# Options for psm:
options 	PSM_HOOKRESUME		#hook the system resume event, useful
					#for some laptops
options 	PSM_RESETAFTERSUSPEND	#reset the device at the resume event

# The video card driver.
device		vga
hint.vga.0.at="isa"

# Options for vga:
# Try the following option if the mouse pointer is not drawn correctly
# or font does not seem to be loaded properly.  May cause flicker on
# some systems.
options 	VGA_ALT_SEQACCESS

# If you can dispense with some vga driver features, you may want to
# use the following options to save some memory.
#options 	VGA_NO_FONT_LOADING	# don't save/load font
#options 	VGA_NO_MODE_CHANGE	# don't change video modes

# Older video cards may require this option for proper operation.
options 	VGA_SLOW_IOACCESS	# do byte-wide i/o's to TS and GDC regs

# The following option probably won't work with the LCD displays.
options 	VGA_WIDTH90		# support 90 column modes

# To include support for VESA video modes
options 	VESA

options 	FB_DEBUG		# Frame buffer debugging
options 	FB_INSTALL_CDEV		# install a CDEV entry in /dev

# Splash screen at start up!  Screen savers require this too.
device		splash

# The pcvt console driver (vt220 compatible).
device		vt
hint.vt.0.at="isa"
options 	XSERVER			# support for running an X server on vt
options 	FAT_CURSOR		# start with block cursor
# This PCVT option is for keyboards such as those used on IBM ThinkPad laptops
options 	PCVT_SCANSET=2 		# IBM keyboards are non-std
# Other PCVT options are documented in pcvt(4).
options 	PCVT_24LINESDEF
options 	PCVT_CTRL_ALT_DEL
options 	PCVT_META_ESC
options 	PCVT_NSCREENS=9
options 	PCVT_PRETTYSCRNS
options 	PCVT_SCREENSAVER
options 	PCVT_USEKBDSEC
options 	PCVT_VT220KEYB
options 	PCVT_GREENSAVER

# The syscons console driver (sco color console compatible).
device		sc	1
hint.sc.0.at="isa"
options 	MAXCONS=16		# number of virtual consoles
options 	SC_ALT_MOUSE_IMAGE	# simplified mouse cursor in text mode
options 	SC_DFLT_FONT		# compile font in
makeoptions	SC_DFLT_FONT=cp850
options 	SC_DISABLE_DDBKEY	# disable `debug' key
options 	SC_DISABLE_REBOOT	# disable reboot key sequence
options 	SC_HISTORY_SIZE=200	# number of history buffer lines
options 	SC_MOUSE_CHAR=0x3	# char code for text mode mouse cursor
options 	SC_PIXEL_MODE		# add support for the raster text mode

# The following options will let you change the default colors of syscons.
options 	SC_NORM_ATTR="(FG_GREEN|BG_BLACK)"
options 	SC_NORM_REV_ATTR="(FG_YELLOW|BG_GREEN)"
options 	SC_KERNEL_CONS_ATTR="(FG_RED|BG_BLACK)"
options 	SC_KERNEL_CONS_REV_ATTR="(FG_BLACK|BG_RED)"

# If you have a two button mouse, you may want to add the following option
# to use the right button of the mouse to paste text.
options 	SC_TWOBUTTON_MOUSE

# You can selectively disable features in syscons.
options 	SC_NO_CUTPASTE
options 	SC_NO_FONT_LOADING
options 	SC_NO_HISTORY
options 	SC_NO_SYSMOUSE

# `flags' for sc
#	0x80	Put the video card in the VESA 800x600 dots, 16 color mode
#	0x100	Probe for a keyboard device periodically if one is not present

# 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
# the /dev/3dfx0 device to work with glide implementations. This should get
# linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
# the tdfx DRI module from XFree86 and is completely unrelated.
#
# To enable Linuxulator support, one must also include COMPAT_LINUX in the
# config as well, or you will not have the dependencies. The other option
# is to load both as modules.

device 		tdfx			# Enable 3Dfx Voodoo support
options 	TDFX_LINUX		# Enable Linuxulator support

#
# The Numeric Processing eXtension driver.  In addition to this, you
# may configure a math emulator (see above).  If your machine has a
# hardware FPU and the kernel configuration includes the npx device
# *and* a math emulator compiled into the kernel, the hardware FPU
# will be used, unless it is found to be broken or unless "flags" to
# npx0 includes "0x08", which requests preference for the emulator.
device		npx
hint.npx.0.at="nexus"
hint.npx.0.port="0x0F0"
hint.npx.0.flags="0x0"
hint.npx.0.irq="13"

#
# `flags' for npx0:
#	0x01	don't use the npx registers to optimize bcopy.
#	0x02	don't use the npx registers to optimize bzero.
#	0x04	don't use the npx registers to optimize copyin or copyout.
#	0x08	use emulator even if hardware FPU is available.
# The npx registers are normally used to optimize copying and zeroing when
# all of the following conditions are satisfied:
#	I586_CPU is an option
#	the cpu is an i586 (perhaps not a Pentium)
#	the probe for npx0 succeeds
#	INT 16 exception handling works.
# Then copying and zeroing using the npx registers is normally 30-100% faster.
# The flags can be used to control cases where it doesn't work or is slower.
# Setting them at boot time using userconfig works right (the optimizations
# are not used until later in the bootstrap when npx0 is attached).
# Flag 0x08 automatically disables the i586 optimized routines.
#

#
# ACPI support using the Intel ACPI Component Architecture reference
# implementation.
#
# ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
# kernel environment variables to select initial debugging levels for the
# Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
# defined when it is built).
#
device		acpica
options		ACPI_DEBUG

#
# Optional devices:
#

#
# SCSI host adapters:
#
# adv: All Narrow SCSI bus AdvanSys controllers.
# adw: Second Generation AdvanSys controllers including the ADV940UW.
# aha: Adaptec 154x/1535/1640
# ahb: Adaptec 174x EISA controllers
# ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
#      19160x/29160x, aic7770/aic78xx
# aic: Adaptec 6260/6360, APA-1460 (PC Card), NEC PC9801-100 (C-BUS)
# amd: Support for the AMD 53C974 SCSI host adapter chip as found on devices
#      such as the Tekram DC-390(T).
# bt:  Most Buslogic controllers: including BT-445, BT-54x, BT-64x, BT-74x,
#      BT-75x, BT-946, BT-948, BT-956, BT-958, SDC3211B, SDC3211F, SDC3222F
# isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
#      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
#      ISP 12160 Ultra3 SCSI,
#      Qlogic ISP 2100 and ISP 2200 Fibre Channel host adapters.
# ispfw: Firmware module for Qlogic host adapters
# ncr: NCR 53C810, 53C825 self-contained SCSI host adapters.
# ncv: NCR 53C500 based SCSI host adapters.
# nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
# sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
#      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
#      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
#      53C1010-33, 53C1010-66.
# stg: TMC 18C30, 18C50 based SCSI host adapters.
# wds: WD7000

#
# Note that the order is important in order for Buslogic ISA/EISA cards to be
# probed correctly.
#
device		bt
hint.bt.0.at="isa"
hint.bt.0.port="0x330"
device		adv
hint.adv.0.at="isa"
device		adw
device		aha
hint.aha.0.at="isa"
device		aic
hint.aic.0.at="isa"
device		ahb
device		ahc
device		amd
device		isp
hint.isp.0.disable="1"
hint.isp.0.role="3"
hint.isp.0.prefer_iomap="1"
hint.isp.0.prefer_memmap="1"
hint.isp.0.fwload_disable="1"
hint.isp.0.ignore_nvram="1"
hint.isp.0.fullduplex="1"
hint.isp.0.topology="lport"
hint.isp.0.topology="nport"
hint.isp.0.topology="lport-only"
hint.isp.0.topology="nport-only"
# we can't get u_int64_t types, nor can we get strings if it's got
# a leading 0x, hence this silly dodge.
hint.isp.0.portwnn="w50000000aaaa0000"
hint.isp.0.nodewnn="w50000000aaaa0001"
device		ispfw
device		ncr
device		ncv
device		nsp
device		sym
device		stg
hint.stg.0.at="isa"
hint.stg.0.port="0x140"
hint.stg.0.port="11"
device		wds
hint.wds.0.at="isa"
hint.wds.0.port="0x350"
hint.wds.0.irq="11"
hint.wds.0.drq="6"

# The aic7xxx driver will attempt to use memory mapped I/O for all PCI
# controllers that have it configured only if this option is set. Unfortunately,
# this doesn't work on some motherboards, which prevents it from being the
# default.
options 	AHC_ALLOW_MEMIO

# Enable diagnostic sequencer code.
options 	AHC_DEBUG_SEQUENCER

# Dump the contents of the ahc controller configuration PROM.
options 	AHC_DUMP_EEPROM

# Bitmap of units to enable targetmode operations.
options 	AHC_TMODE_ENABLE

# The adw driver will attempt to use memory mapped I/O for all PCI
# controllers that have it configured only if this option is set.
options 	ADW_ALLOW_MEMIO

# Options used in dev/isp/ (Qlogic SCSI/FC driver).
#
#	ISP_TARGET_MODE		-	enable target mode operation
#
#options 	ISP_TARGET_MODE=1

# Options used in dev/sym/ (Symbios SCSI driver).
#options 	SYM_SETUP_LP_PROBE_MAP	#-Low Priority Probe Map (bits)
					# Allows the ncr to take precedence
					# 1 (1<<0) -> 810a, 860
					# 2 (1<<1) -> 825a, 875, 885, 895
					# 4 (1<<2) -> 895a, 896, 1510d
#options 	SYM_SETUP_SCSI_DIFF	#-HVD support for 825a, 875, 885
					# disabled:0 (default), enabled:1
#options 	SYM_SETUP_PCI_PARITY	#-PCI parity checking
					# disabled:0, enabled:1 (default)
#options 	SYM_SETUP_MAX_LUN	#-Number of LUNs supported
					# default:8, range:[1..64]

# The 'asr' driver provides support for current DPT/Adaptec SCSI RAID
# controllers (SmartRAID V and VI and later).
# These controllers require the CAM infrastructure.
#
device		asr

# The 'dpt' driver provides support for old DPT controllers (http://www.dpt.com/).
# These have hardware RAID-{0,1,5} support, and do multi-initiator I/O.
# The DPT controllers are commonly re-licensed under other brand-names -
# some controllers by Olivetti, Dec, HP, AT&T, SNI, AST, Alphatronic, NEC and
# Compaq are actually DPT controllers.
#
# See src/sys/dev/dpt for debugging and other subtle options.
#   DPT_MEASURE_PERFORMANCE Enables a set of (semi)invasive metrics. Various
#                           instruments are enabled.  The tools in
#                           /usr/sbin/dpt_* assume these to be enabled.
#   DPT_HANDLE_TIMEOUTS     Normally device timeouts are handled by the DPT.
#                           If you ant the driver to handle timeouts, enable
#                           this option.  If your system is very busy, this
#                           option will create more trouble than solve.
#   DPT_TIMEOUT_FACTOR      Used to compute the excessive amount of time to
#                           wait when timing out with the above option.
#  DPT_DEBUG_xxxx           These are controllable from sys/dev/dpt/dpt.h
#  DPT_LOST_IRQ             When enabled, will try, once per second, to catch
#                           any interrupt that got lost.  Seems to help in some
#                           DPT-firmware/Motherboard combinations.  Minimal
#                           cost, great benefit.
#  DPT_RESET_HBA            Make "reset" actually reset the controller
#                           instead of fudging it.  Only enable this if you
#			    are 100% certain you need it.

device		dpt

# DPT options
#!CAM# options 	DPT_MEASURE_PERFORMANCE
#!CAM# options 	DPT_HANDLE_TIMEOUTS
options 	DPT_TIMEOUT_FACTOR=4
options 	DPT_LOST_IRQ
options 	DPT_RESET_HBA
options 	DPT_ALLOW_MEMIO

#
# Mylex AcceleRAID and eXtremeRAID controllers with v6 and later
# firmware.  These controllers have a SCSI-like interface, and require
# the CAM infrastructure.
#
device		mly

#
# Adaptec FSA RAID controllers, including integrated DELL controllers,
# the Dell PERC 2/QC and the HP NetRAID-4M
#
# AAC_COMPAT_LINUX	Include code to support Linux-binary management
#			utilities (requires Linux compatibility
#			support).
#
device		aac

#
# Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
# one entry is needed; the code will find and configure all supported
# controllers.
#
device		ida		# Compaq Smart RAID
device		mlx		# Mylex DAC960
device		amr		# AMI MegaRAID

#
# 3ware ATA RAID
#
device		twe		# 3ware ATA RAID

#
# The 'ATA' driver supports all ATA and ATAPI devices, including PC Card
# devices. You only need one "device ata" for it to find all
# PCI and PC Card ATA/ATAPI devices on modern machines.
device		ata
device		atadisk		# ATA disk drives
device		atapicd		# ATAPI CDROM drives
device		atapifd		# ATAPI floppy drives
device		atapist		# ATAPI tape drives

#
# For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
hint.ata.0.at="isa"
hint.ata.0.port="0x1f0"
hint.ata.0.irq="14"
hint.ata.1.at="isa"
hint.ata.1.port="0x170"
hint.ata.1.irq="15"

#
# The following options are valid on the ATA driver:
#
# ATA_STATIC_ID:	controller numbering is static ie depends on location
#			else the device numbers are dynamically allocated.
# ATA_ENABLE_ATAPI_DMA:	enable DMA on ATAPI device, since many ATAPI devices
#			claim to support DMA but doesn't actually work, this
#			is not enabled as default.
# ATA_ENABLE_WC		enable write caching on ATA disks that supports it.
# ATA_ENABLE_TAGS	enable tagged queuing on ATA disks that supports it.
#			Also turns on write caching as that seem to be
#			required for tagged queing to work.

options 	ATA_STATIC_ID
options 	ATA_ENABLE_ATAPI_DMA
options 	ATA_ENABLE_WC
options 	ATA_ENABLE_TAGS

#
# Standard floppy disk controllers and floppy tapes, supports
# the Y-E DATA External FDD (PC Card)
#
device		fdc
hint.fdc.0.at="isa"
hint.fdc.0.port="0x3F0"
hint.fdc.0.irq="6"
hint.fdc.0.drq="2"
#
# FDC_DEBUG enables floppy debugging.  Since the debug output is huge, you
# gotta turn it actually on by setting the variable fd_debug with DDB,
# however.
options 	FDC_DEBUG
#
# Activate this line if you happen to have an Insight floppy tape.
# Probing them proved to be dangerous for people with floppy disks only,
# so it's "hidden" behind a flag:
#hint.fdc.0.flags="1"

# Specify floppy devices
hint.fd.0.at="fdc0"
hint.fd.0.drive="0"
hint.fd.1.at="fdc0"
hint.fd.1.drive="1"

# M-systems DiskOnchip products see src/sys/contrib/dev/fla/README
device		fla
hint.fla.0.at="isa"

#
# Other standard PC hardware:
#
# mse: Logitech and ATI InPort bus mouse ports
# sio: serial ports (see sio(4)), including support for various
#      PC Card devices, such as Modem and NICs (see etc/defaults/pccard.conf)

device		mse
hint.mse.0.at="isa"
hint.mse.0.port="0x23c"
hint.mse.0.irq="5"

device		sio
hint.sio.0.at="isa"
hint.sio.0.port="0x3F8"
hint.sio.0.flags="0x10"
hint.sio.0.irq="4"

#
# `flags' for serial drivers that support consoles (only for sio now):
#	0x10	enable console support for this unit.  The other console flags
#		are ignored unless this is set.  Enabling console support does
#		not make the unit the preferred console - boot with -h or set
#		the 0x20 flag for that.  Currently, at most one unit can have
#		console support; the first one (in config file order) with
#		this flag set is preferred.  Setting this flag for sio0 gives
#		the old behaviour.
#	0x20	force this unit to be the console (unless there is another
#		higher priority console).  This replaces the COMCONSOLE option.
#	0x40	reserve this unit for low level console operations.  Do not
#		access the device in any normal way.
#	0x80	use this port for serial line gdb support in ddb.
#
# PnP `flags' (set via userconfig using pnp x flags y)
#	0x1	disable probing of this device.  Used to prevent your modem
#		from being attached as a PnP modem.
#

# Options for serial drivers that support consoles (only for sio now):
options 	BREAK_TO_DEBUGGER	#a BREAK on a comconsole goes to
					#DDB, if available.
options 	CONSPEED=9600		#default speed for serial console (default 9600)

# Solaris implements a new BREAK which is initiated by a character
# sequence CR ~ ^b which is similar to a familiar pattern used on
# Sun servers by the Remote Console.
options 	ALT_BREAK_TO_DEBUGGER

# Options for sio:
options 	COM_ESP			#code for Hayes ESP
options 	COM_MULTIPORT		#code for some cards with shared IRQs

# Other flags for sio that aren't documented in the man page.
#	0x20000	enable hardware RTS/CTS and larger FIFOs.  Only works for
#		ST16650A-compatible UARTs.

#
# Network interfaces:
#
# MII bus support is required for some PCI 10/100 ethernet NICs,
# namely those which use MII-compliant transceivers or implement
# tranceiver control interfaces that operate like an MII. Adding
# "device miibus0" to the kernel config pulls in support for
# the generic miibus API and all of the PHY drivers, including a
# generic one for PHYs that aren't specifically handled by an
# individual driver.
device		miibus

# an:   Aironet 4500/4800 802.11 wireless adapters. Supports the PCMCIA,
#       PCI and ISA varieties.
# ar:   Arnet SYNC/570i hdlc sync 2/4 port V.35/X.21 serial driver
#       (requires sppp)
# awi:  Support for IEEE 802.11 PC Card devices using the AMD Am79C930 and
#       Harris (Intersil) Chipset with PCnetMobile firmware by AMD.
# cs:   IBM Etherjet and other Crystal Semi CS89x0-based adapters
# cx:   Cronyx/Sigma multiport sync/async (with Cisco or PPP framing)
# dc:   Support for PCI fast ethernet adapters based on the DEC/Intel 21143
#       and various workalikes including:
#       the ADMtek AL981 Comet and AN985 Centaur, the ASIX Electronics
#       AX88140A and AX88141, the Davicom DM9100 and DM9102, the Lite-On
#       82c168 and 82c169 PNIC, the Lite-On/Macronix LC82C115 PNIC II
#       and the Macronix 98713/98713A/98715/98715A/98725 PMAC. This driver
#       replaces the old al, ax, dm, pn and mx drivers.  List of brands:
#       Digital DE500-BA, Kingston KNE100TX, D-Link DFE-570TX, SOHOware SFA110,
#       SVEC PN102-TX, CNet Pro110B, 120A, and 120B, Compex RL100-TX,
#       LinkSys LNE100TX, LNE100TX V2.0, Jaton XpressNet, Alfa Inc GFC2204,
#       KNE110TX.
# de:   Digital Equipment DC21040
# ed:   Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
#       HP PC Lan+, various PC Card devices (refer to etc/defauls/pccard.conf)
# el:   3Com 3C501 (slow!)
# ep:   3Com 3C509, 3C529, 3C556, 3C562D, 3C563D, 3C572, 3C574X, 3C579, 3C589
#       and PC Card devices using these chipsets.
# ex:   Intel EtherExpress Pro/10 and other i82595-based adapters,
#       Olicom Ethernet PC Card devices.
# fe:   Fujitsu MB86960A/MB86965A Ethernet
# fea:  DEC DEFEA EISA FDDI adapter
# fpa:  Support for the Digital DEFPA PCI FDDI. `device fddi' is also needed.
# fxp:  Intel EtherExpress Pro/100B
#	(hint of prefer_iomap can be done to prefer I/O instead of Mem mapping)
# ie:   AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
#       Intel EtherExpress
# le:   Digital Equipment EtherWorks 2 and EtherWorks 3 (DEPCA, DE100,
#       DE101, DE200, DE201, DE202, DE203, DE204, DE205, DE422)
# lnc:  Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and
#       Am79C960)
# oltr: Olicom ISA token-ring adapters OC-3115, OC-3117, OC-3118 and OC-3133
#       (no hints needed).
#       Olicom PCI token-ring adapters OC-3136, OC-3137, OC-3139, OC-3140,
#       OC-3141, OC-3540, OC-3250
# rdp:  RealTek RTL 8002-based pocket ethernet adapters
# pcn:	Support for PCI fast ethernet adapters based on the AMD Am79c97x
#	chipsets, including the PCnet/FAST, PCnet/FAST+, PCnet/PRO and
#	PCnet/Home. These were previously handled by the lnc driver (and
#	still will be if you leave this driver out of the kernel).
# rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
#       chipset.  Note that the RealTek driver defaults to using programmed
#       I/O to do register accesses because memory mapped mode seems to cause
#       severe lockups on SMP hardware.  This driver also supports the
#       Accton EN1207D `Cheetah' adapter, which uses a chip called
#       the MPX 5030/5038, which is either a RealTek in disguise or a
#       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
#       chipset and is supported by this driver, not the 'vr' driver.
# sf:   Support for Adaptec Duralink PCI fast ethernet adapters based on the
#       Adaptec AIC-6915 "starfire" controller.
#       This includes dual and quad port cards, as well as one 100baseFX card.
#       Most of these are 64-bit PCI devices, except for one single port
#       card which is 32-bit.
# sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
#       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
# sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
#       This includes the SK-9841 and SK-9842 single port cards (single mode
#       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
#       (also single mode and multimode).
#       The driver will autodetect the number of ports on the card and
#       attach each one as a separate network interface.
# sn:   Support for ISA and PC Card Ethernet devices using the
#       SMC91C90/92/94/95 chips.
# sr:   RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp)
# ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
#       the D-Link DFE-550TX.
# ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
#       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
#       3Com 3c985, the Netgear GA620 and various others.  Note that you will
#       probably want to bump up NMBCLUSTERS a lot to use this driver.
# tl:   Support for the Texas Instruments TNETE100 series 'ThunderLAN'
#       cards and integrated ethernet controllers.  This includes several
#       Compaq Netelligent 10/100 cards and the built-in ethernet controllers
#       in several Compaq Prosignia, Proliant and Deskpro systems.  It also
#       supports several Olicom 10Mbps and 10/100 boards.
# tx:   SMC 9432 TX, BTX and FTX cards. (SMC EtherPower II serie)
# vr:   Support for various fast ethernet adapters based on the VIA
#       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
#       including the D-Link DFE530TX (see 'rl' for DFE530TX+), the Hawking
#       Technologies PN102TX, and the AOpen/Acer ALN-320.
# vx:   3Com 3C590 and 3C595
# wb:   Support for fast ethernet adapters based on the Winbond W89C840F chip.
#       Note: this is not the same as the Winbond W89C940F, which is a
#       NE2000 clone.
# wl:   Lucent Wavelan (ISA card only).
# wi:   Lucent WaveLAN/IEEE 802.11 PCMCIA adapters. Note: this supports both
#       the PCMCIA and ISA cards: the ISA card is really a PCMCIA to ISA
#       bridge with a PCMCIA adapter plugged into it.
# wx:   Intel Gigabit Ethernet PCI card (`Wiseman')
# xe:   Xircom/Intel EtherExpress Pro100/16 PC Card ethernet controller,
#       Accton Fast EtherCard-16, Compaq Netelligent 10/100 PC Card,
#       Toshiba 10/100 Ethernet PC Card, Xircom 16-bit Ethernet + Modem 56
# xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
#       Etherlink XL cards and integrated controllers.  This includes the
#       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
#       Precision desktop machines and the integrated 3c905-TX chips
#       in Dell Latitude laptop docking stations.
#       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX

# Order for ISA/EISA devices is important here

device		ar	1
hint.ar.0.at="isa"
hint.ar.0.port="0x300"
hint.ar.0.irq="10"
hint.ar.0.maddr="0xd0000"
device		cs
hint.cs.0.at="isa"
hint.cs.0.port="0x300"
device		cx	1
hint.cx.0.at="isa"
hint.cx.0.port="0x240"
hint.cx.0.irq="15"
hint.cx.0.drq="7"
device		ed
hint.ed.0.at="isa"
hint.ed.0.port="0x280"
hint.ed.0.irq="5"
hint.ed.0.maddr="0xd8000"
device		el	1
hint.el.0.at="isa"
hint.el.0.port="0x300"
hint.el.0.irq="9"
device		ep
device		ex
device		fe	1
options 	FE_8BIT_SUPPORT		# LAC-98 support
hint.fe.0.at="isa"
hint.fe.0.port="0x300"
device		fea
device		ie	2
hint.ie.0.at="isa"
hint.ie.0.port="0x300"
hint.ie.0.irq="5"
hint.ie.0.maddr="0xd0000"
hint.ie.1.at="isa"
hint.ie.1.port="0x360"
hint.ie.1.irq="7"
hint.ie.1.maddr="0xd0000"
device		le	1
hint.le.0.at="isa"
hint.le.0.port="0x300"
hint.le.0.irq="5"
hint.le.0.maddr="0xd0000"
device		lnc	1
hint.lnc.0.at="isa"
hint.lnc.0.port="0x280"
hint.lnc.0.irq="10"
hint.lnc.0.drq="0"
device		rdp	1
hint.rdp.0.at="isa"
hint.rdp.0.port="0x378"
hint.rdp.0.irq="7"
hint.rdp.0.flags="2"
device		sr	1
hint.sr.0.at="isa"
hint.sr.0.port="0x300"
hint.sr.0.irq="5"
hint.sr.0.maddr="0xd0000"
device		sn
hint.sn.0.at="isa"
hint.sn.0.port="0x300"
hint.sn.0.irq="10"
device		an
device		awi
device		wi
options 	WLCACHE		# enables the signal-strength cache
options 	WLDEBUG		# enables verbose debugging output
device		wl	1
hint.wl.0.at="isa"
hint.wl.0.port="0x300"
device		xe

device		oltr
options 	OLTR_NO_BULLSEYE_MAC
options 	OLTR_NO_HAWKEYE_MAC
options 	OLTR_NO_TMS_MAC
hint.oltr.0.at="isa"

# PCI Ethernet NICs that use the common MII bus controller code.
device		dc		# DEC/Intel 21143 and various workalikes
device		rl		# RealTek 8129/8139
device		pcn		# AMD Am79C79x PCI 10/100 NICs
device		sf		# Adaptec AIC-6915 (``Starfire'')
device		sis		# Silicon Integrated Systems SiS 900/SiS 7016
device		ste		# Sundance ST201 (D-Link DFE-550TX)
device		tl		# Texas Instruments ThunderLAN
device		tx		# SMC EtherPower II (83c170 ``EPIC'')
device		vr		# VIA Rhine, Rhine II
device		wb		# Winbond W89C840F
device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')

# PCI Ethernet NICs.
device		de		# DEC/Intel DC21x4x (``Tulip'')
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
hint.fxp.0.prefer_iomap="0"
device		vx		# 3Com 3c590, 3c595 (``Vortex'')

# PCI Gigabit & FDDI NICs.
device		sk
device		ti
device		wx
device		fpa	1

#
# ATM related options (Cranor version)
# (note: this driver cannot be used with the HARP ATM stack)
#
# The `en' device provides support for Efficient Networks (ENI)
# ENI-155 PCI midway cards, and the Adaptec 155Mbps PCI ATM cards (ANA-59x0).
#
# atm device provides generic atm functions and is required for
# atm devices.
# NATM enables the netnatm protocol family that can be used to
# bypass TCP/IP.
#
# the current driver supports only PVC operations (no atm-arp, no multicast).
# for more details, please read the original documents at
# http://www.ccrc.wustl.edu/pub/chuck/tech/bsdatm/bsdatm.html
#
device		atm
device		en
options 	NATM			#native ATM

#
# Audio drivers: `pcm', `sbc', `gusc', `pca'
#
# pcm: PCM audio through various sound cards.
#
# This has support for a large number of new audio cards, based on
# CS423x, OPTi931, Yamaha OPL-SAx, and also for SB16, GusPnP.
# For more information about this driver and supported cards,
# see the pcm.4 man page.
#
# The flags of the device tells the device a bit more info about the
# device that normally is obtained through the PnP interface.
#	bit  2..0   secondary DMA channel;
#	bit  4      set if the board uses two dma channels;
#	bit 15..8   board type, overrides autodetection; leave it
#		    zero if don't know what to put in (and you don't,
#		    since this is unsupported at the moment...).
#
# This driver will use the new PnP code if it's available.
#
# pca: PCM audio through your PC speaker
#
# Supported cards include:
# Creative SoundBlaster ISA PnP/non-PnP
# Supports ESS and Avance ISA chips as well.
# Gravis UltraSound ISA PnP/non-PnP
# Crystal Semiconductor CS461x/428x PCI
# Neomagic 256AV (ac97)
# Most of the more common ISA/PnP sb/mss/ess compatable cards.

device		pcm

# For non-pnp sound cards with no bridge drivers only:
hint.pcm.0.at="isa"
hint.pcm.0.irq="10"
hint.pcm.0.drq="1"
hint.pcm.0.flags="0x0"

# For PnP/PCI sound cards, no hints are required.

#
# midi: MIDI interfaces and synthesizers
#

device		midi

# For non-pnp sound cards with no bridge drivers:
hint.midi.0.at="isa"
hint.midi.0.irq="5"
hint.midi.0.flags="0x0"

# For serial ports (this example configures port 2):
# TODO: implement generic tty-midi interface so that we can use
#	other uarts.
hint.midi.0.at="isa"
hint.midi.0.port="0x2F8"
hint.midi.0.irq="3"

#
# seq: MIDI sequencer
#

device		seq

# The bridge drivers for sound cards.  These can be separately configured
# for providing services to the likes of new-midi.
# When used with 'device pcm' they also provide pcm sound services.
#
# sbc:  Creative SoundBlaster ISA PnP/non-PnP
#	Supports ESS and Avance ISA chips as well.
# gusc: Gravis UltraSound ISA PnP/non-PnP
# csa:  Crystal Semiconductor CS461x/428x PCI

# For non-PnP cards:
device		sbc
hint.sbc.0.at="isa"
hint.sbc.0.port="0x220"
hint.sbc.0.irq="5"
hint.sbc.0.drq="1"
hint.sbc.0.flags="0x15"
device		gusc
hint.gusc.0.at="isa"
hint.gusc.0.port="0x220"
hint.gusc.0.irq="5"
hint.gusc.0.drq="1"
hint.gusc.0.flags="0x13"

device		pca
hint.pca.0.at="isa"
hint.pca.0.port="0x040"

#
# Miscellaneous hardware:
#
# mcd: Mitsumi CD-ROM
# scd: Sony CD-ROM
# matcd: Matsushita/Panasonic CD-ROM
# wt: Wangtek and Archive QIC-02/QIC-36 tape drives
# ctx: Cortex-I frame grabber
# apm: Laptop Advanced Power Management (experimental)
# pmtimer: Timer device driver for power management events (APM or ACPI)
# spigot: The Creative Labs Video Spigot video-acquisition board
# meteor: Matrox Meteor video capture board
# bktr: Brooktree bt848/848a/849a/878/879 video capture and TV Tuner board
# cy: Cyclades serial driver
# dgb: Digiboard PC/Xi and PC/Xe series driver (ALPHA QUALITY!)
# dgm: Digiboard PC/Xem driver
# gp:  National Instruments AT-GPIB and AT-GPIB/TNT board, PCMCIA-GPIB
# asc: GI1904-based hand scanners, e.g. the Trust Amiscan Grey
# gsc: Genius GS-4500 hand scanner.
# joy: joystick (including IO DATA PCJOY PC Card joystick)
# The LOUTB option specifies a slower outb() for debugging purposes.
# rc: RISCom/8 multiport card
# rp: Comtrol Rocketport(ISA) - single card
# tw: TW-523 power line interface for use with X-10 home control products
# si: Specialix SI/XIO 4-32 port terminal multiplexor
# spic: Sony Programmable I/O controller (VAIO notebooks)
# stl: Stallion EasyIO and EasyConnection 8/32 (cd1400 based)
# stli: Stallion EasyConnection 8/64, ONboard, Brumby (intelligent)

# Notes on APM
#  The flags takes the following meaning for apm0:
#    0x0020  Statclock is broken.
#  If apm is omitted, some systems require sysctl -w kern.timecounter.method=1
#  for correct timekeeping.

# Notes on the spigot:
#  The video spigot is at 0xad6.  This port address can not be changed.
#  The irq values may only be 10, 11, or 15
#  I/O memory is an 8kb region.  Possible values are:
#    0a0000, 0a2000, ..., 0fffff, f00000, f02000, ..., ffffff
#    The start address must be on an even boundary.
#  Add the following option if you want to allow non-root users to be able
#  to access the spigot.  This option is not secure because it allows users
#  direct access to the I/O page.
#  	options SPIGOT_UNSECURE

# Notes on the Comtrol Rocketport driver:
#
# The exact values used for rp0 depend on how many boards you have
# in the system.  The manufacturer's sample configs are listed as:
#
#               device  rp	# core driver support
#
#   Comtrol Rocketport ISA single card
#		hints.rp.0.at="isa"
#		hints.rp.0.port="0x280"
#
#   If instead you have two ISA cards, one installed at 0x100 and the
#   second installed at 0x180, then you should add the following to
#   your kernel probe hints:
#		hints.rp.0.at="isa"
#		hints.rp.0.port="0x100"
#		hints.rp.1.at="isa"
#		hints.rp.1.port="0x180"
#
#   For 4 ISA cards, it might be something like this:
#		hints.rp.0.at="isa"
#		hints.rp.0.port="0x180"
#		hints.rp.1.at="isa"
#		hints.rp.1.port="0x100"
#		hints.rp.2.at="isa"
#		hints.rp.2.port="0x340"
#		hints.rp.3.at="isa"
#		hints.rp.3.port="0x240"
#
#   And for PCI cards, you need no hints.

# Notes on the Digiboard driver:
#
# The following flag values have special meanings:
#	0x01 - alternate layout of pins (dgb & dgm)
#	0x02 - use the windowed PC/Xe in 64K mode (dgb only)

# Notes on the Specialix SI/XIO driver:
#  The host card is memory, not IO mapped.
#  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
#  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
#  The cards can use an IRQ of 11, 12 or 15.

# Notes on the Sony Programmable I/O controller
#  This is a temporary driver that should someday be replaced by something
#  that hooks into the ACPI layer. The device is hooked to the PIIX4's
#  General Device 10 decoder, which means you have to fiddle with PCI
#  registers to map it in, even though it is otherwise treated here as
#  an ISA device. At the moment, the driver polls, although the device
#  is capable of generating interrupts. It largely undocumented.
#  The port location in the hint is where you WANT the device to be
#  mapped. 0x10a0 seems to be traditional. At the moment the jogdial
#  is the only thing truly supported, but aparently a fair percentage
#  of the Vaio extra features are controlled by this device.

# Notes on the Stallion stl and stli drivers:
#  See src/i386/isa/README.stl for complete instructions.
#  This is version 0.0.5alpha, unsupported by Stallion.
#  The stl driver has a secondary IO port hard coded at 0x280.  You need
#     to change src/i386/isa/stallion.c if you reconfigure this on the boards.
#  The "flags" and "msize" settings on the stli driver depend on the board:
#	EasyConnection 8/64 ISA:     flags 23         msize 0x1000
#	EasyConnection 8/64 EISA:    flags 24         msize 0x10000
#	EasyConnection 8/64 MCA:     flags 25         msize 0x1000
#	ONboard ISA:                 flags 4          msize 0x10000
#	ONboard EISA:                flags 7          msize 0x10000
#	ONboard MCA:                 flags 3          msize 0x10000
#	Brumby:                      flags 2          msize 0x4000
#	Stallion:                    flags 1          msize 0x10000

device		mcd	1
hint.mcd.0.at="isa"
hint.mcd.0.port="0x300"
hint.mcd.0.irq="10"
# for the Sony CDU31/33A CDROM
device		scd	1
hint.scd.0.at="isa"
hint.scd.0.port="0x230"
# for the SoundBlaster 16 multicd - up to 4 devices
device		matcd	1
hint.matcd.0.at="isa"
hint.matcd.0.port="0x230"
device		wt	1
hint.wt.0.at="isa"
hint.wt.0.port="0x300"
hint.wt.0.irq="5"
hint.wt.0.drq="1"
device		ctx	1
hint.ctx.0.at="isa"
hint.ctx.0.port="0x230"
hint.ctx.0.maddr="0xd0000"
device		spigot	1
hint.spigot.0.at="isa"
hint.spigot.0.port="0xad6"
hint.spigot.0.irq="15"
hint.spigot.0.maddr="0xee000"
device		apm
hint.apm.0.flags="0x20"
device		pmtimer			# Adjust system timer at wakeup time
hint.pmtimer.0.at="isa"
device		gp
hint.gp.0.at="isa"
hint.gp.0.port="0x2c0"
device		gsc	1
hint.gsc.0.at="isa"
hint.gsc.0.port="0x270"
hint.gsc.0.drq="3"
device		joy			# PnP aware, hints for nonpnp only
hint.joy.0.at="isa"
hint.joy.0.port="0x201"
device		cy	1
options 	CY_PCI_FASTINTR		# Use with cy_pci unless irq is shared
hint.cy.0.at="isa"
hint.cy.0.irq="10"
hint.cy.0.maddr="0xd4000"
hint.cy.0.msize="0x2000"
device		dgb	1
options 	NDGBPORTS=16		# Defaults to 16*NDGB
hint.dgb.0.at="isa"
hint.dgb.0.port="0x220"
hint.dgb.0.maddr="0xfc000"
device		dgm	1
hint.dgm.0.at="isa"
hint.dgm.0.port="0x104"
hint.dgm.0.maddr="0xd0000"
device		rc	1
hint.rc.0.at="isa"
hint.rc.0.port="0x220"
hint.rc.0.irq="12"
device		rp
hint.rp.0.at="isa"
hint.rp.0.port="0x280"
# the port and irq for tw0 are fictitious
device		tw	1
hint.tw.0.at="isa"
hint.tw.0.port="0x380"
hint.tw.0.irq="11"
device		si
options 	SI_DEBUG
hint.si.0.at="isa"
hint.si.0.maddr="0xd0000"
hint.si.0.irq="12"
device		asc	1
hint.asc.0.at="isa"
hint.asc.0.port="0x3EB"
hint.asc.0.drq="3"
hint.asc.0.irq="10"
device		spic
hint.spic.0.at="isa"
hint.spic.0.port="0x10a0"
device		stl
hint.stl.0.at="isa"
hint.stl.0.port="0x2a0"
hint.stl.0.irq="10"
device		stli
hint.stli.0.at="isa"
hint.stli.0.port="0x2a0"
hint.stli.0.maddr="0xcc000"
hint.stli.0.flags="23"
hint.stli.0.msize="0x1000"
# You are unlikely to have the hardware for loran <phk@FreeBSD.org>
device		loran
hint.loran.0.at="isa"
hint.loran.0.irq="5"
# HOT1 Xilinx 6200 card (http://www.vcc.com/)
device		xrpu

#
# The `meteor' device is a PCI video capture board. It can also have the
# following options:
#   options METEOR_ALLOC_PAGES=xxx	preallocate kernel pages for data entry
#	figure (ROWS*COLUMN*BYTES_PER_PIXEL*FRAME+PAGE_SIZE-1)/PAGE_SIZE
#   options METEOR_DEALLOC_PAGES	remove all allocated pages on close(2)
#   options METEOR_DEALLOC_ABOVE=xxx	remove all allocated pages above the
#	specified amount. If this value is below the allocated amount no action
#	taken
#   options METEOR_SYSTEM_DEFAULT={METEOR_PAL|METEOR_NTSC|METEOR_SECAM}, used
#	for initialization of fps routine when a signal is not present.
#
# The 'bktr' device is a PCI video capture device using the Brooktree
# bt848/bt848a/bt849a/bt878/bt879 chipset. When used with a TV Tuner it forms a
# TV card, eg Miro PC/TV, Hauppauge WinCast/TV WinTV, VideoLogic Captivator,
# Intel Smart Video III, AverMedia, IMS Turbo, FlyVideo.
#
# options 	OVERRIDE_CARD=xxx
# options 	OVERRIDE_TUNER=xxx
# options 	OVERRIDE_MSP=1
# options 	OVERRIDE_DBX=1
# These options can be used to override the auto detection
# The current values for xxx are found in src/sys/dev/bktr/bktr_card.h
# Using sysctl(8) run-time overrides on a per-card basis can be made
#
# options 	BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_PAL
# or
# options 	BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_NTSC
# Specifes the default video capture mode.
# This is required for Dual Crystal (28&35Mhz) boards where PAL is used
# to prevent hangs during initialisation.  eg VideoLogic Captivator PCI.
#
# options 	BKTR_USE_PLL
# PAL or SECAM users who have a 28Mhz crystal (and no 35Mhz crystal)
# must enable PLL mode with this option. eg some new Bt878 cards.
#
# options 	BKTR_GPIO_ACCESS
# This enable IOCTLs which give user level access to the GPIO port.
#
# options 	BKTR_NO_MSP_RESET
# Prevents the MSP34xx reset. Good if you initialise the MSP in another OS first
#
# options 	BKTR_430_FX_MODE
# Switch Bt878/879 cards into Intel 430FX chipset compatibility mode.
#
# options 	BKTR_SIS_VIA_MODE
# Switch Bt878/879 cards into SIS/VIA chipset compatibility mode which is
# needed for some old SiS and VIA chipset motherboards.
# This also allows Bt878/879 chips to work on old OPTi (<1997) chipset
# motherboards and motherboards with bad or incomplete PCI 2.1 support.
# As a rough guess, old = before 1998
#

device		meteor	1

# Brooktree driver has been ported to the new I2C framework. Thus,
# you'll need to have the following 3 lines in the kernel config.
#     device smbus
#     device iicbus
#     device iicbb
# The iic and smb devices are only needed if you want to control other
# I2C slaves connected to the external connector of some cards.
#
device		bktr	1

#
# PC Card/PCMCIA
#
# card: pccard slots
# pcic: isa/pccard bridge
device		pcic
hint.pcic.0.at="isa"
hint.pcic.1.at="isa"
device		card

# You may need to reset all pccards after resuming
options 	PCIC_RESUME_RESET	# reset after resume

#
# Laptop/Notebook options:
#
# See also:
#  apm under `Miscellaneous hardware'
# above.

# For older notebooks that signal a powerfail condition (external
# power supply dropped, or battery state low) by issuing an NMI:

options 	POWERFAIL_NMI	# make it beep instead of panicing

#
# SMB bus
#
# System Management Bus support is provided by the 'smbus' device.
# Access to the SMBus device is via the 'smb' device (/dev/smb*),
# which is a child of the 'smbus' device.
#
# Supported devices:
# smb		standard io through /dev/smb*
#
# Supported SMB interfaces:
# iicsmb	I2C to SMB bridge with any iicbus interface
# bktr		brooktree848 I2C hardware interface
# intpm		Intel PIIX4 Power Management Unit
# alpm		Acer Aladdin-IV/V/Pro2 Power Management Unit
# ichsmb	Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
#
device		smbus		# Bus support, required for smb below.

device		intpm
device		alpm
device		ichsmb

device		smb

#
# I2C Bus
#
# Philips i2c bus support is provided by the `iicbus' device.
#
# Supported devices:
# ic	i2c network interface
# iic	i2c standard io
# iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
#
# Supported interfaces:
# pcf	Philips PCF8584 ISA-bus controller
# bktr	brooktree848 I2C software interface
#
# Other:
# iicbb	generic I2C bit-banging code (needed by lpbb, bktr)
#
device		iicbus		# Bus support, required for ic/iic/iicsmb below.
device		iicbb

device		ic
device		iic
device		iicsmb		# smb over i2c bridge

device		pcf
hint.pcf.0.at="isa"
hint.pcf.0.port="0x320"
hint.pcf.0.irq="5"

#---------------------------------------------------------------------------
# ISDN4BSD
#
# See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd.
#
# i4b passive ISDN cards support contains the following hardware drivers:
#
#	isic  - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver
#	iwic  - Winbond W6692 PCI bus ISDN S/T interface controller
#	ifpi  - AVM Fritz!Card PCI driver
#	ihfc  - Cologne Chip HFC ISA/ISA-PnP chipset driver
#	ifpnp - AVM Fritz!Card PnP driver
#	itjc  - Siemens ISAC / TJNet Tiger300/320 chipset
#
# Note that the ``options'' (if given) and ``device'' lines must BOTH
# be uncommented to enable support for a given card !
#
# In addition to a hardware driver (and probably an option) the mandatory
# ISDN protocol stack devices and the mandatory support device must be
# enabled as well as one or more devices from the optional devices section.
#
#---------------------------------------------------------------------------
#	isic driver (Siemens/Infineon chipsets)
#
device	isic
#
# ISA bus non-PnP Cards:
# ----------------------
#
# Teles S0/8 or Niccy 1008
options 	TEL_S0_8
hint.isic.0.at="isa"
hint.isic.0.maddr="0xd0000"
hint.isic.0.irq="5"
hint.isic.0.flags="1"
#
# Teles S0/16 or Creatix ISDN-S0 or Niccy 1016
options 	TEL_S0_16
hint.isic.0.at="isa"
hint.isic.0.port="0xd80"
hint.isic.0.maddr="0xd0000"
hint.isic.0.irq="5"
hint.isic.0.flags="2"
#
# Teles S0/16.3
options 	TEL_S0_16_3
hint.isic.0.at="isa"
hint.isic.0.port="0xd80"
hint.isic.0.irq="5"
hint.isic.0.flags="3"
#
# AVM A1 or AVM Fritz!Card
options 	AVM_A1
hint.isic.0.at="isa"
hint.isic.0.port="0x340"
hint.isic.0.irq="5"
hint.isic.0.flags="4"
#
# USRobotics Sportster ISDN TA intern
options 	USR_STI
hint.isic.0.at="isa"
hint.isic.0.port="0x268"
hint.isic.0.irq="5"
hint.isic.0.flags="7"
#
# ITK ix1 Micro ( < V.3, non-PnP version )
options 	ITKIX1
hint.isic.0.at="isa"
hint.isic.0.port="0x398"
hint.isic.0.irq="10"
hint.isic.0.flags="18"
#
# ELSA PCC-16
options 	ELSA_PCC16
hint.isic.0.at="isa"
hint.isic.0.port="0x360"
hint.isic.0.irq="10"
hint.isic.0.flags="20"
#
# ISA bus PnP Cards:
# ------------------
#
# Teles S0/16.3 PnP
options 	TEL_S0_16_3_P
#
# Creatix ISDN-S0 P&P
options 	CRTX_S0_P
#
# Dr. Neuhaus Niccy Go@
options 	DRN_NGO
#
# Sedlbauer Win Speed
options 	SEDLBAUER
#
# Dynalink IS64PH
options 	DYNALINK
#
# ELSA QuickStep 1000pro ISA
options 	ELSA_QS1ISA
#
# Siemens I-Surf 2.0
options 	SIEMENS_ISURF2
#
# Asuscom ISDNlink 128K ISA
options 	ASUSCOM_IPAC
#
# Eicon Diehl DIVA 2.0 and 2.02
options       EICON_DIVA
#
# PCI bus Cards:
# --------------
#
# ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI)
options 	ELSA_QS1PCI
#
#
#---------------------------------------------------------------------------
#	ifpnp driver for AVM Fritz!Card PnP
#
# AVM Fritz!Card PnP
device ifpnp
#
#---------------------------------------------------------------------------
#	ihfc driver for Cologne Chip ISA chipsets (experimental!)
#
# Teles 16.3c ISA PnP
# AcerISDN P10 ISA PnP
# TELEINT ISDN SPEED No.1
device ihfc
#
#---------------------------------------------------------------------------
#	ifpi driver for AVM Fritz!Card PCI
#
# AVM Fritz!Card PCI
device  ifpi
#
#---------------------------------------------------------------------------
#	iwic driver for Winbond W6692 chipset
#
# ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards)
device  iwic
#
#---------------------------------------------------------------------------
#	itjc driver for Simens ISAC / TJNet Tiger300/320 chipset
#
# Traverse Technologies NETjet-S
# Teles PCI-TJ
device  itjc
#
#---------------------------------------------------------------------------
#	ISDN Protocol Stack - mandatory for all hardware drivers
#
# Q.921 / layer 2 - i4b passive cards D channel handling
device		"i4bq921"
#
# Q.931 / layer 3 - i4b passive cards D channel handling
device		"i4bq931"
#
# layer 4 - i4b common passive and active card handling
device		"i4b"
#
#---------------------------------------------------------------------------
#	ISDN devices - mandatory for all hardware drivers
#
# userland driver to do ISDN tracing (for passive cards only)
device		"i4btrc"	4
#
# userland driver to control the whole thing
device		"i4bctl"
#
#---------------------------------------------------------------------------
#	ISDN devices - optional
#
# userland driver for access to raw B channel
device		"i4brbch"	4
#
# userland driver for telephony
device		"i4btel"	2
#
# network driver for IP over raw HDLC ISDN
device		"i4bipr"	4
# enable VJ header compression detection for ipr i/f
options 	IPR_VJ
# enable logging of the first n IP packets to isdnd (n=32 here)
options 	IPR_LOG=32
#
# network driver for sync PPP over ISDN; requires an equivalent
# number of sppp device to be configured
device		"i4bisppp"	4
#
# B-channel inteface to the netgraph subsystem
device		"i4bing"	2
#
#---------------------------------------------------------------------------

# Parallel-Port Bus
#
# Parallel port bus support is provided by the `ppbus' device.
# Multiple devices may be attached to the parallel port, devices
# are automatically probed and attached when found.
#
# Supported devices:
# vpo	Iomega Zip Drive
#	Requires SCSI disk support ('scbus' and 'da'), best
#	performance is achieved with ports in EPP 1.9 mode.
# lpt	Parallel Printer
# plip	Parallel network interface
# ppi	General-purpose I/O ("Geek Port") + IEEE1284 I/O
# pps	Pulse per second Timing Interface
# lpbb	Philips official parallel port I2C bit-banging interface
#
# Supported interfaces:
# ppc	ISA-bus parallel port interfaces.
#

options		PPC_PROBE_CHIPSET # Enable chipset specific detection
				  # (see flags in ppc(4))
options 	DEBUG_1284	# IEEE1284 signaling protocol debug
options 	PERIPH_1284	# Makes your computer act as a IEEE1284
				# compliant peripheral
options 	DONTPROBE_1284	# Avoid boot detection of PnP parallel devices
options 	VP0_DEBUG	# ZIP/ZIP+ debug
options 	LPT_DEBUG	# Printer driver debug
options 	PPC_DEBUG	# Parallel chipset level debug
options 	PLIP_DEBUG	# Parallel network IP interface debug
options		PCFCLOCK_VERBOSE         # Verbose pcfclock driver
options		PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)

device		ppc
hint.ppc.0.at="isa"
hint.ppc.0.irq="7"
device		ppbus
device		vpo
device		lpt
device		plip
device		ppi
device		pps
device		lpbb
device		pcfclock

# Kernel BOOTP support

options 	BOOTP		# Use BOOTP to obtain IP address/hostname
options 	BOOTP_NFSROOT	# NFS mount root filesystem using BOOTP info
options 	BOOTP_NFSV3	# Use NFS v3 to NFS mount root
options 	BOOTP_COMPAT	# Workaround for broken bootp daemons.
options 	BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP

#
# Add tie-ins for a hardware watchdog.  This only enable the hooks;
# the user must still supply the actual driver.
#
options 	HW_WDOG

#
# Set the number of PV entries per process.  Increasing this can
# stop panics related to heavy use of shared memory. However, that can
# (combined with large amounts of physical memory) cause panics at
# boot time due the kernel running out of VM space.
#
# If you're tweaking this, you might also want to increase the sysctls
# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
#
# The value below is the one more than the default.
#
options 	PMAP_SHPGPERPROC=201

#
# Disable swapping. This option removes all code which actually performs
# swapping, so it's not possible to turn it back on at run-time.
#
# This is sometimes usable for systems which don't have any swap space
# (see also sysctls "vm.defer_swapspace_pageouts" and
# "vm.disable_swapspace_pageouts")
#
#options 	NO_SWAPPING

# Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
# for sendfile(2) that are used to map file VM pages, and normally
# default to a quantity that is roughly 16*MAXUSERS+512. You would
# typically want about 4 of these for each simultaneous file send.
#
options 	NSFBUFS=1024

#
# Enable extra debugging code for locks.  This stores the filename and
# line of whatever acquired the lock in the lock itself, and change a
# number of function calls to pass around the relevant data.  This is
# not at all useful unless you are debugging lock code.  Also note
# that it is likely to break e.g. fstat(1) unless you recompile your
# userland with -DDEBUG_LOCKS as well.
#
options 	DEBUG_LOCKS


#####################################################################
# ABI Emulation

# Enable iBCS2 runtime support for SCO and ISC binaries
options 	IBCS2

# Emulate spx device for client side of SVR3 local X interface
options 	SPX_HACK

# Enable Linux ABI emulation
options 	COMPAT_LINUX

# Enable the linux-like proc filesystem support (requires COMPAT_LINUX)
options 	LINPROCFS

# Linux debugging
options 	DEBUG_LINUX

#
# SysVR4 ABI emulation
#
# The svr4 ABI emulator can be statically compiled into the kernel or loaded as
# a KLD module.
# The STREAMS network emulation code can also be compiled statically or as a
# module.  If loaded as a module, it must be loaded before the svr4 module
# (the /usr/sbin/svr4 script does this for you).  If compiling statically,
# the `streams' device must be configured into any kernel which also
# specifies COMPAT_SVR4.  It is possible to have a statically-configured
# STREAMS device and a dynamically loadable svr4 emulator;  the /usr/sbin/svr4
# script understands that it doesn't need to load the `streams' module under
# those circumstances.
# Caveat:  At this time, `options KTRACE' is required for the svr4 emulator
# (whether static or dynamic).
#
options		COMPAT_SVR4	# build emulator statically
options		DEBUG_SVR4	# enable verbose debugging
device		streams		# STREAMS network driver (required for svr4).


#####################################################################
# USB support
# UHCI controller
device		uhci
# OHCI controller
device		ohci
# General USB code (mandatory for USB)
device		usb
#
# USB Double Bulk Pipe devices
device		udbp
# Generic USB device driver
device		ugen
# Human Interface Device (anything with buttons and dials)
device		uhid
# USB keyboard
device		ukbd
# USB printer
device		ulpt
# USB Iomega Zip 100 Drive
device		umass
# USB modem support
device		umodem
# USB mouse
device		ums
# Diamond Rio 500 Mp3 player
device		urio
# USB scanners
device		uscanner
#
# ADMtek USB ethernet. Supports the LinkSys USB100TX,
# the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
# and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
# eval board.
device		aue
#
# CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
# and Netmate II, and the Belkin F5U111.
device		cue
#
# Kawasaki LSI ethernet. Supports the LinkSys USB10T,
# Entrega USB-NET-E45, Peracom Ethernet Adapter, the
# 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
# the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
# and 2104USB, and the Corega USB-T.
device		kue

# debugging options for the USB subsystem
#
options 	UHCI_DEBUG
options 	OHCI_DEBUG
options 	USB_DEBUG

options 	UGEN_DEBUG
options 	UHID_DEBUG
options 	UHUB_DEBUG
options 	UKBD_DEBUG
options 	ULPT_DEBUG
options 	UMASS_DEBUG
options 	UMS_DEBUG
options 	URIO_DEBUG

# options for ukbd:
options 	UKBD_DFLT_KEYMAP	# specify the built-in keymap
makeoptions	UKBD_DFLT_KEYMAP=it.iso

#
# Embedded system options:
#
# An embedded system might want to run something other than init.
options 	INIT_PATH="/sbin/init:/stand/sysinstall"

# Debug options
options 	BUS_DEBUG	# enable newbus debugging
options 	DEBUG_VFS_LOCKS	# enable vfs lock debugging
options 	NPX_DEBUG	# enable npx debugging (FPU/math emu)

#####################################################################
# SYSV IPC KERNEL PARAMETERS
#
# Maximum number of entries in a semaphore map.
options 	SEMMAP=31

# Maximum number of System V semaphores that can be used on the system at
# one time.
options 	SEMMNI=11

# Total number of semaphores system wide
options 	SEMMNS=61

# Total number of undo structures in system
options 	SEMMNU=31

# Maximum number of System V semaphores that can be used by a single process
# at one time.
options 	SEMMSL=61

# Maximum number of operations that can be outstanding on a single System V
# semaphore at one time.
options 	SEMOPM=101

# Maximum number of undo operations that can be outstanding on a single
# System V semaphore at one time.
options 	SEMUME=11

# Maximum number of shared memory pages system wide.
options 	SHMALL=1025

# Maximum size, in bytes, of a single System V shared memory region.
options 	SHMMAX="(SHMMAXPGS*PAGE_SIZE+1)"
options 	SHMMAXPGS=1025

# Minimum size, in bytes, of a single System V shared memory region.
options 	SHMMIN=2

# Maximum number of shared memory regions that can be used on the system
# at one time.
options 	SHMMNI=33

# Maximum number of System V shared memory regions that can be attached to
# a single process at one time.
options 	SHMSEG=9

#####################################################################

# More undocumented options for linting.
# Note that documenting these are not considered an affront.

options 	CAM_DEBUG_DELAY

# VFS cluster debugging.
options 	CLUSTERDEBUG

# Eliminate unneeded cache flush instruction(s).
options 	CPU_UPGRADE_HW_CACHE

options 	DEBUG

# PECOFF module (Win32 Execution Format)
options		PECOFF_SUPPORT
options		PECOFF_DEBUG

# Disable the 4 MByte PSE CPU feature.
#options 	DISABLE_PSE

options 	ENABLE_ALART
options 	I4B_SMP_WORKAROUND
options 	I586_PMC_GUPROF=0x70000
options 	KBDIO_DEBUG=2
options 	KBD_MAXRETRY=4
options 	KBD_MAXWAIT=6
options 	KBD_RESETDELAY=201

# Enable the PF_KEY Key Management API.
options 	KEY

# Kernel filelock debugging.
options 	LOCKF_DEBUG

# System V compatible message queues
# Please note that the values provided here are used to test kernel
# building.  The defaults in the sources provide almost the same numbers.
# MSGSSZ must be a power of 2 between 8 and 1024.
options 	MSGMNB=2049	# Max number of chars in queue
options 	MSGMNI=41	# Max number of message queue identifiers
options 	MSGSEG=2049	# Max number of message segments
options 	MSGSSZ=16	# Size of a message segment
options 	MSGTQL=41	# Max number of messages in system

options 	NBUF=512	# Number of buffer headers

options 	NMBCLUSTERS=1024	# Number of mbuf clusters

options 	PANIC_REBOOT_WAIT_TIME=16

options 	PSM_DEBUG=1

options 	SCSI_NCR_DEBUG
options 	SCSI_NCR_MAX_SYNC=10000
options 	SCSI_NCR_MAX_WIDE=1
options 	SCSI_NCR_MYADDR=7

options 	SC_DEBUG_LEVEL=5	# Syscons debug level
options 	SC_RENDER_DEBUG	# syscons rendering debugging

options 	SHOW_BUSYBUFS	# List buffers that prevent root unmount
options 	SIMPLELOCK_DEBUG
options 	SLIP_IFF_OPTS
options 	TIMER_FREQ="((14318182+6)/12)"
options 	VFS_BIO_DEBUG	# VFS buffer I/O debugging

options 	VM_KMEM_SIZE
options 	VM_KMEM_SIZE_MAX
options 	VM_KMEM_SIZE_SCALE