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INSTALL_TINY revision 1.11.2.4
      1 #	$NetBSD: INSTALL_TINY,v 1.11.2.4 2001/02/11 19:10:52 bouyer Exp $
      2 #
      3 #	INSTALL_TINY - Tiny Installation kernel, suitable for 4M machines.
      4 #
      5 #	This kernel should be derived from INSTALL (which is derived
      6 #	from GENERIC) with some features commented out.
      7 #
      8 #	This kernel has been optimized for space. It is targeted towards
      9 #	small memory machines (4M). It has no SCSI, PCI or EISA. It does
     10 #	have pcmcia, for old laptops.
     11 #
     12 
     13 include "arch/i386/conf/std.i386"
     14 
     15 makeoptions 	COPTS="-Os"		# Optimise for space. Implies -O2
     16 
     17 # Enable the hooks used for initializing the root memory-disk.
     18 options 	MEMORY_DISK_HOOKS
     19 options 	MEMORY_DISK_IS_ROOT	# force root on memory disk
     20 options 	MEMORY_DISK_SERVER=0	# no userspace memory disk support
     21 options 	MINIROOTSIZE=2688	# size of memory disk, in blocks
     22 #options 	MINIROOTSIZE=2880	# 1.44M, same as a floppy
     23 
     24 maxusers	2		# estimated number of users
     25 
     26 # CPU support.  At least one is REQUIRED.
     27 options 	I386_CPU
     28 options 	I486_CPU
     29 #options 	I586_CPU
     30 #options 	I686_CPU
     31 
     32 # CPU-related options.
     33 options 	MATH_EMULATE	# floating point emulation
     34 #options 	VM86		# virtual 8086 emulation
     35 #options 	USER_LDT	# user-settable LDT; used by WINE
     36 # eliminate delay no-ops in I/O; recommended on all but very old machines
     37 #options 	DUMMY_NOPS
     38 
     39 # Misc. i386-specific options
     40 #options 	XSERVER		# X server support in console drivers
     41 
     42 # This option allows you to force a serial console at the specified
     43 # I/O address.
     44 #options 	"CONSDEVNAME=\"com\"",CONADDR=0x3f8,CONSPEED=9600
     45 
     46 # The following options override the memory sizes passed in from the boot
     47 # block.  Use them *only* if the boot block is unable to determine the correct
     48 # values.  Note that the BIOS may *correctly* report less than 640k of base
     49 # memory if the extended BIOS data area is located at the top of base memory
     50 # (as is the case on most recent systems).
     51 #options 	REALBASEMEM=...	# size of base memory
     52 #options 	REALEXTMEM=...	# size of extended memory
     53 
     54 #options 	UCONSOLE	# users can use TIOCCONS (for xconsole)
     55 options 	INSECURE	# disable kernel security levels
     56 
     57 options 	RTC_OFFSET=0	# hardware clock is this many mins. west of GMT
     58 #options 	NTP		# NTP phase/frequency locked loop
     59 
     60 #options 	KTRACE		# system call tracing via ktrace(1)
     61 
     62 #options 	SYSVSEM		# System V-like semaphores
     63 #options 	SYSVSHM		# System V-like memory sharing
     64 #options 	SHMMAXPGS=1024	# 1024 pages is the default
     65 
     66 #options 	LKM		# loadable kernel modules
     67 
     68 # Diagnostic/debugging support options
     69 #options 	DIAGNOSTIC	# cheap kernel consistency checks
     70 #options 	DEBUG		# expensive debugging checks/support
     71 #options 	KMEMSTATS	# kernel memory statistics (vmstat -m)
     72 #options 	DDB		# in-kernel debugger
     73 #options 	DDB_HISTORY_SIZE=512	# enable history editing in DDB
     74 #options 	KGDB		# remote debugger
     75 #options 	"KGDB_DEVNAME=\"com\"",KGDBADDR=0x3f8,KGDBRATE=9600
     76 #makeoptions 	DEBUG="-g"	# compile full symbol table
     77 
     78 # Compatibility options
     79 #options 	COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
     80 #options 	COMPAT_09	# NetBSD 0.9,
     81 #options 	COMPAT_10	# NetBSD 1.0,
     82 #options 	COMPAT_11	# NetBSD 1.1,
     83 #options 	COMPAT_12	# NetBSD 1.2,
     84 #options 	COMPAT_13	# NetBSD 1.3,
     85 options 	COMPAT_14	# NetBSD 1.4,
     86 #options 	COMPAT_43	# and 4.3BSD
     87 options 	COMPAT_386BSD_MBRPART # recognize old partition ID
     88 
     89 #options 	COMPAT_SVR4	# binary compatibility with SVR4
     90 #options 	COMPAT_IBCS2	# binary compatibility with SCO and ISC
     91 #options 	COMPAT_LINUX	# binary compatibility with Linux
     92 #options 	COMPAT_FREEBSD	# binary compatibility with FreeBSD
     93 
     94 # File systems
     95 file-system 	FFS		# UFS
     96 #file-system 	EXT2FS		# second extended file system (linux)
     97 #file-system 	LFS		# log-structured file system
     98 #file-system 	MFS		# memory file system
     99 file-system 	NFS		# Network File System client
    100 file-system 	CD9660		# ISO 9660 + Rock Ridge file system
    101 file-system 	MSDOSFS		# MS-DOS file system
    102 #file-system 	FDESC		# /dev/fd
    103 file-system 	KERNFS		# /kern
    104 #file-system 	NULLFS		# loopback file system
    105 #file-system 	PORTAL		# portal filesystem (still experimental)
    106 #file-system 	PROCFS		# /proc
    107 #file-system 	UMAPFS		# NULLFS + uid and gid remapping
    108 #file-system 	UNION		# union file system
    109 
    110 # Filesystem options
    111 #options 	QUOTA		# UFS quotas
    112 #options 	NFSSERVER	# Network File System server
    113 options 	NFS_V2_ONLY	# Exclude NFS3 and NQNFS code to save space
    114 options 	VNODE_OP_NOINLINE # Save space by not inlining vnode op calls
    115 #options 	EXT2FS_SYSTEM_FLAGS # makes ext2fs file flags (append and
    116 				# immutable) behave as system flags.
    117 
    118 # Networking options
    119 #options 	GATEWAY		# packet forwarding
    120 options 	INET		# IP + ICMP + TCP + UDP
    121 #options 	MROUTING	# IP multicast routing
    122 #options 	NS		# XNS
    123 #options 	NSIP		# XNS tunneling over IP
    124 #options 	ISO,TPIP	# OSI
    125 #options 	EON		# OSI tunneling over IP
    126 #options 	CCITT,LLC,HDLC	# X.25
    127 #options 	NETATALK	# AppleTalk networking protocols
    128 #options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP
    129 #options 	PPP_DEFLATE	# Deflate compression support for PPP
    130 #options 	PPP_FILTER	# Active filter support for PPP (requires bpf)
    131 #options 	PFIL_HOOKS	# pfil(9) packet filter hooks
    132 
    133 # Compatibility with 4.2BSD implementation of TCP/IP.  Not recommended.
    134 #options 	TCP_COMPAT_42
    135 
    136 # These options enable verbose messages for several subsystems.
    137 # Warning, these may compile large string tables into the kernel!
    138 #options 	EISAVERBOSE	# verbose EISA device autoconfig messages
    139 #options 	PCIVERBOSE	# verbose PCI device autoconfig messages
    140 #options 	PCI_CONFIG_DUMP	# verbosely dump PCI config space
    141 #options 	PCMCIAVERBOSE	# verbose PCMCIA configuration messages
    142 #options 	SCSIVERBOSE	# human readable SCSI error messages
    143 #options	I2OVERBOSE	# verbose I2O driver messages
    144 
    145 # Squeeze...
    146 options 	NVNODE=50
    147 options 	NBUF=20
    148 options 	BUFPAGES=20
    149 options 	NMBCLUSTERS=64
    150 
    151 # Kernel root file system and dump configuration.
    152 config		netbsd	root on ? type ?
    153 #config		netbsd	root on sd0a type ffs
    154 #config		netbsd	root on ? type nfs
    155 
    156 #
    157 # Device configuration
    158 #
    159 
    160 mainbus0 at root
    161 
    162 #apm0	at mainbus0			# Advanced power management
    163 
    164 
    165 # Basic Bus Support
    166 
    167 # PCI bus support
    168 #pci*	at mainbus? bus ?
    169 #pci*	at pchb? bus ?
    170 #pci*	at ppb? bus ?
    171 
    172 # PCI bridges
    173 #pchb*	at pci? dev ? function ?	# PCI-Host bridges
    174 #pceb*	at pci? dev ? function ?	# PCI-EISA bridges
    175 #pcib*	at pci? dev ? function ?	# PCI-ISA bridges
    176 #ppb*	at pci? dev ? function ?	# PCI-PCI bridges
    177 # XXX 'puc's aren't really bridges, but there's no better place for them here
    178 #puc*	at pci? dev ? function ?	# PCI "universal" comm. cards
    179 
    180 # As well as 5 and 7, avoid irq 4 and 3 because we do not probe com* here
    181 options 	PCIC_ISA_INTR_ALLOC_MASK=0xff47
    182 
    183 # PCMCIA bus support
    184 pcmcia* at pcic? controller ? socket ?
    185 #pcmcia* at tcic? controller ? socket ?
    186 
    187 # ISA PCMCIA controllers
    188 pcic0   at isa? port 0x3e0 iomem 0xd0000 iosiz 0x10000
    189 pcic1   at isa? port 0x3e2 iomem 0xe0000 iosiz 0x4000
    190 
    191 # EISA bus support
    192 #eisa*	at mainbus?
    193 #eisa*	at pceb?
    194 
    195 # ISA bus support
    196 isa*	at mainbus?
    197 #eisa*	at pceb?
    198 #isa*	at pcib?
    199 
    200 # ISA Plug-and-Play bus support
    201 #isapnp0	at isa?
    202 
    203 # Coprocessor Support
    204 
    205 # Math Coprocessor support
    206 npx0	at isa? port 0xf0 irq 13	# x86 math coprocessor
    207 
    208 
    209 # Console Devices
    210 
    211 # ISA console
    212 pc0	at isa? port 0x60 irq 1		# pccons generic PC console driver
    213 
    214 #pcppi0	at isa?
    215 #sysbeep0	at pcppi?
    216 
    217 
    218 # Serial Devices
    219 
    220 # PCI serial interfaces
    221 #com*	at puc? port ?			# 16x50s on "universal" comm boards
    222 #cy*	at pci? dev ? function ?	# Cyclades Cyclom-Y serial boards
    223 
    224 # ISA Plug-and-Play serial interfaces
    225 #com*	at isapnp?			# Modems and serial boards
    226 
    227 # PCMCIA serial interfaces
    228 #com*	at pcmcia? function ?		# Modems and serial cards
    229 
    230 # ISA serial interfaces
    231 #options 	COM_HAYESP		# adds Hayes ESP serial board support
    232 #com0	at isa? port 0x3f8 irq 4	# Standard PC serial ports
    233 #com1	at isa? port 0x2f8 irq 3
    234 #com2	at isa? port 0x3e8 irq 5
    235 #com3	at isa? port 0x2e8 irq 9
    236 #ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
    237 #com*	at ast? slave ?
    238 #boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
    239 #com*	at boca? slave ?
    240 #rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
    241 #com*	at rtfps? slave ?
    242 #cy0	at isa? iomem 0xd4000 irq 12	# Cyclades serial cards
    243 
    244 
    245 # Parallel Printer Interfaces
    246 
    247 # PCI parallel printer interfaces
    248 #lpt*	at puc? port ?			# || ports on "universal" comm boards
    249 
    250 # ISA parallel printer interfaces
    251 #lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
    252 #lpt1	at isa? port 0x278
    253 #lpt2	at isa? port 0x3bc
    254 
    255 # I2O devices
    256 #iop*	at pci? dev ? function ?	# I/O processor
    257 #iopsp*	at iop? tid ?			# SCSI/FC-AL ports
    258 #ld*	at iop? tid ?			# block devices
    259 
    260 # SCSI Controllers and Devices
    261 
    262 # PCI SCSI controllers
    263 #ahc*	at pci? dev ? function ?	# Adaptec [23]94x, aic78x0 SCSI
    264 #bha*	at pci? dev ? function ?	# BusLogic 9xx SCSI
    265 #dpt*	at pci? dev ? function ?	# DPT SmartCache/SmartRAID
    266 #isp*	at pci? dev ? function ?	# Qlogic ISP [12]0x0 SCSI/FibreChannel
    267 #ncr*	at pci? dev ? function ?	# NCR 53c8xx SCSI
    268 
    269 # EISA SCSI controllers
    270 #ahb*	at eisa? slot ?			# Adaptec 174[02] SCSI
    271 #ahc*	at eisa? slot ?			# Adaptec 274x, aic7770 SCSI
    272 #bha*	at eisa? slot ?			# BusLogic 7xx SCSI
    273 #dpt*	at eisa? slot ?			# DPT SmartCache/SmartRAID
    274 #uha*	at eisa? slot ?			# UltraStor 24f SCSI
    275 
    276 # PCMCIA SCSI controllers
    277 #aic*	at pcmcia? function ?		# Adaptec APA-1460 SCSI
    278 
    279 # ISA Plug-and-Play SCSI controllers
    280 #aic*	at isapnp?			# Adaptec AHA-1520B
    281 
    282 # ISA SCSI controllers
    283 #aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI
    284 #aha1	at isa? port 0x334 irq ? drq ?
    285 #ahc0	at isa? port ? irq ?		# Adaptec 284x SCSI
    286 #aic0	at isa? port 0x340 irq 11	# Adaptec 152[02] SCSI
    287 #bha0	at isa? port 0x330 irq ? drq ?	# BusLogic [457]4X SCSI
    288 #bha1	at isa? port 0x334 irq ? drq ?
    289 # The "nca" and "dpt" probes might give false hits or hang your machine.
    290 #dpt0	at isa? port 0x170 irq ? drq ?	# DPT SmartCache/SmartRAID
    291 #nca0	at isa? port 0x360 irq 15	# Port-mapped NCR 53C80 controller
    292 #nca1	at isa? iomem 0xd8000 irq 5	# Memory-mapped controller (T128, etc.)
    293 #sea0	at isa? iomem 0xc8000 irq 5	# Seagate/Future Domain SCSI
    294 #uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI
    295 #uha1	at isa? port 0x340 irq ? drq ?
    296 #wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
    297 #wds1	at isa? port 0x358 irq 11 drq 5
    298 
    299 # SCSI bus support
    300 #scsibus* at aha?
    301 #scsibus* at ahb?
    302 #scsibus* at ahc?
    303 #scsibus* at aic?
    304 #scsibus* at bha?
    305 #scsibus* at dpt?
    306 #scsibus* at iopsp?
    307 #scsibus* at isp?
    308 #scsibus* at nca?
    309 #scsibus* at ncr?
    310 #scsibus* at sea?
    311 #scsibus* at uha?
    312 #scsibus* at wds?
    313 
    314 # SCSI devices
    315 #sd*	at scsibus? target ? lun ?	# SCSI disk drives
    316 #st*	at scsibus? target ? lun ?	# SCSI tape drives
    317 #cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
    318 #ch*	at scsibus? target ? lun ?	# SCSI autochangers
    319 #ss*	at scsibus? target ? lun ?	# SCSI scanners
    320 #uk*	at scsibus? target ? lun ?	# SCSI unknown
    321 
    322 
    323 # RAID controllers and devices
    324 #cac*	at eisa?			# Compaq EISA array controllers
    325 #cac*	at pci? dev ? function ?	# Compaq PCI array controllers
    326 #mlx*	at pci? dev ? function ?	# Mylex DAC960 & DEC SWXCR family
    327 #twe*	at pci? dev ? function ?	# 3ware Escalade RAID controllers
    328 
    329 #ld*	at cac? unit ?			# logical disk devices
    330 #ld*	at twe? unit ?
    331 #ld*	at mlx? unit ?
    332 
    333 
    334 # IDE and related devices
    335 
    336 # PCMCIA IDE controllers
    337 wdc* 	at pcmcia? function ?
    338 
    339 # ST506, ESDI, and ISA IDE controllers
    340 # Use flags 0x01 if you want to try to use 32bits data I/O (the driver will
    341 # fall back to 16bits I/O if 32bits I/O are not functional).
    342 # Some controllers pass the initial 32bit test, but will fail later.
    343 wdc0	at isa? port 0x1f0 irq 14 flags 0x00
    344 wdc1	at isa? port 0x170 irq 15 flags 0x00
    345 
    346 # IDE drives
    347 wd*	at wdc? drive ?			# the drives themselves
    348 
    349 # ATAPI bus support
    350 atapibus* at wdc?
    351 
    352 # ATAPI devices
    353 cd*	at atapibus? drive ?		# ATAPI CD-ROM drives
    354 #sd*	at atapibus? drive ?		# ATAPI disk drives
    355 
    356 
    357 # Miscellaneous mass storage devices
    358 
    359 # ISA floppy
    360 fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
    361 #fdc1	at isa? port 0x370 irq ? drq ?
    362 fd*	at fdc? drive ?			# the drives themselves
    363 # some machines need you to do this instead of fd*
    364 #fd0	at fdc0 drive 0
    365 
    366 # ISA CD-ROM devices
    367 #mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives
    368 
    369 # ISA tape devices
    370 # note: the wt driver conflicts unpleasantly with ed devices at the
    371 # same I/O address. The probe reprograms their EEPROMs. Don't
    372 # uncomment it unless you are actually using it.
    373 #wt0	at isa? port 0x308 irq 5 drq 1	# Archive and Wangtek QIC tape drives
    374 
    375 
    376 # Network Interfaces
    377 
    378 # PCI network interfaces
    379 #de*	at pci? dev ? function ?	# DEC 21x4x-based Ethernet
    380 #en*	at pci? dev ? function ?	# ENI/Adaptec ATM
    381 #ep*	at pci? dev ? function ?	# 3Com 3c59x/3c90x Ethernet
    382 #fpa*	at pci? dev ? function ?	# DEC DEFPA FDDI
    383 #fxp*	at pci? dev ? function ?	# Intel EtherExpress PRO 10+/100B
    384 #le*	at pci? dev ? function ?	# PCnet-PCI Ethernet
    385 #ne*	at pci? dev ? function ?	# NE2000-compatible Ethernet
    386 #tl*	at pci? dev ? function ?	# ThunderLAN-based Ethernet
    387 
    388 # EISA network interfaces
    389 #ep*	at eisa? slot ?			# 3Com 3c579 Ethernet
    390 #fea*	at eisa? slot ?			# DEC DEFEA FDDI
    391 
    392 # ISA Plug-and-Play network interfaces
    393 #ep*	at isapnp?			# 3Com 3c509 Ethernet
    394 #ne*	at isapnp?			# NE2000-compatible Ethernet
    395 
    396 # PCMCIA network interfaces
    397 ep*	at pcmcia? function ?		# 3Com 3c589 and 3c562 Ethernet
    398 mbe*	at pcmcia? function ?		# MB8696x based Ethernet
    399 ne*	at pcmcia? function ?		# NE2000-compatible Ethernet
    400 sm*	at pcmcia? function ?		# Megahertz Ethernet
    401 
    402 # ISA network interfaces
    403 ate0	at isa? port 0x2a0 irq ?		# AT1700
    404 ec0	at isa? port 0x250 iomem 0xd8000 irq 9	# 3Com 3c503 Ethernet
    405 eg0	at isa? port 0x280 irq 9		# 3C505 ethernet cards
    406 el0	at isa? port 0x300 irq 9		# 3C501 ethernet cards
    407 ep0	at isa? port ? irq ?			# 3C509 ethernet cards
    408 ef0	at isa? port 0x360 iomem 0xd0000 irq 7	# 3C507
    409 ai0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN
    410 fmv0	at isa? port 0x2a0 irq ?		# FMV-180 series
    411 ix0	at isa? port 0x300 irq 10		# EtherExpress/16
    412 iy0	at isa? port 0x360 irq ?		# EtherExpress PRO 10 ISA
    413 lc0	at isa? port 0x320 iomem ? irq ?	# DEC EtherWORKS III (LEMAC)
    414 #depca0	at isa? port 0x300 iomem 0xc8000 iosiz 0x8000 irq 5	# DEPCA
    415 #le*	at depca?
    416 #nele0	at isa? port 0x320 irq 9 drq 7		# NE2100
    417 #le*	at nele?
    418 #bicc0	at isa? port 0x320 irq 10 drq 7		# BICC IsoLan
    419 #le*	at bicc?
    420 ne0	at isa? port 0x280 irq 9		# NE[12]000 ethernet cards
    421 ne1	at isa? port 0x300 irq 10
    422 sm0	at isa? port 0x300 irq 10		# SMC91C9x Ethernet
    423 we0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC Ethernet
    424 we1	at isa? port 0x300 iomem 0xcc000 irq 10
    425 
    426 # MII bus support
    427 #mii*	at tl?
    428 
    429 # MII PHY network interfaces
    430 #tlphy*	at mii? dev ?			# ThunderLAN PHYs
    431 #nsphy*	at mii? dev ?			# NS and compatible PHYs
    432 
    433 
    434 # Audio Devices
    435 
    436 # ISA Plug-and-Play audio devices
    437 #guspnp*	at isapnp?			# Gravis Ultra Sound PnP audio
    438 #sb*	at isapnp?			# SoundBlaster-compatible audio
    439 
    440 # ISA audio devices
    441 #gus0	at isa? port 0x220 irq 7 drq 1 drq2 6	# Gravis Ultra Sound
    442 #pas0	at isa? port 0x220 irq 7 drq 1		# ProAudio Spectrum
    443 #pss0	at isa? port 0x220 irq 7 drq 6  	# Personal Sound System
    444 #sp0	at pss0 port 0x530 irq 10 drq 0		# 	sound port driver
    445 #sb0	at isa? port 0x220 irq 7 drq 1 drq2 5	# SoundBlaster
    446 #wss0	at isa? port 0x530 irq 10 drq 0	drq2 1	# Windows Sound System
    447 
    448 # Audio support
    449 #audio*	at gus?
    450 #audio*	at guspnp?
    451 #audio*	at pas?
    452 #audio*	at sb?
    453 #audio*	at sp?
    454 #audio*	at wss?
    455 
    456 # The spkr driver provides a simple tone interface to the built in speaker.
    457 #spkr0	at pcppi?		# PC speaker
    458 
    459 
    460 # Mice
    461 
    462 # ISA busmice
    463 #olms0	at isa? port 0x23c irq 5	# Logitech bus mouse
    464 #olms1	at isa? port 0x238 irq 5
    465 #omms0	at isa? port 0x23c irq 5	# Microsoft InPort mouse
    466 #omms1	at isa? port 0x238 irq 5
    467 #opms0	at pc? irq 12		# PS/2 auxiliary port mouse
    468 
    469 
    470 # Joysticks
    471 
    472 # ISA Plug-and-Play joysticks
    473 #joy*	at isapnp?			# Game ports (usually on audio cards)
    474 
    475 # ISA joysticks. Probe is a little strange; add only if you have one.
    476 #joy0	at isa? port 0x201
    477 
    478 
    479 # Miscellaneous Devices
    480 
    481 # Planetconnect Satellite receiver driver.
    482 #satlink0 at isa? port 0x300 drq 1
    483 
    484 
    485 # Pull in optional local configuration
    486 include	"arch/i386/conf/GENERIC.local"
    487 
    488 
    489 # Pseudo-Devices
    490 
    491 # disk/mass storage pseudo-devices
    492 #pseudo-device	ccd		4	# concatenated/striped disk devices
    493 pseudo-device	md		1	# memory disk device (ramdisk)
    494 #pseudo-device	vnd		4	# disk-like interface to files
    495 
    496 # network pseudo-devices
    497 #pseudo-device	bpfilter	8	# Berkeley packet filter
    498 #pseudo-device	ipfilter		# IP filter (firewall) and NAT
    499 pseudo-device	loop			# network loopback
    500 #pseudo-device	ppp		2	# Point-to-Point Protocol
    501 #pseudo-device	sl		2	# Serial Line IP
    502 #pseudo-device	strip		2	# Starmode Radio IP (Metricom)
    503 #pseudo-device	tun		2	# network tunneling over tty
    504 
    505 # miscellaneous pseudo-devices
    506 pseudo-device	pty		2	# pseudo-terminals (Sysinst needs two)
    507 #pseudo-device	tb		1	# tablet line discipline
    508 #pseudo-device	rnd			# /dev/random and in-kernel generator
    509 #options 	RND_COM			# use "com" randomness as well (BROKEN)
    510