Home | History | Annotate | Line # | Download | only in conf
GENERIC_TINY revision 1.16
      1 #	$NetBSD: GENERIC_TINY,v 1.16 2000/06/11 02:41:10 mycroft Exp $
      2 #
      3 #	GENERIC_TINY -- suitable default for 4M machines
      4 #			No EISA, PCI, PCMCIA or SCSI.
      5 #
      6 
      7 include "arch/i386/conf/std.i386"
      8 
      9 maxusers	32		# estimated number of users
     10 
     11 # CPU support.  At least one is REQUIRED.
     12 options 	I386_CPU
     13 options 	I486_CPU
     14 options 	I586_CPU
     15 options 	I686_CPU
     16 
     17 # CPU-related options.
     18 options 	MATH_EMULATE	# floating point emulation
     19 #options 	VM86		# virtual 8086 emulation
     20 #options 	USER_LDT	# user-settable LDT; used by WINE
     21 # eliminate delay no-ops in I/O; recommended on all but very old machines
     22 #options 	DUMMY_NOPS
     23 
     24 # Misc. i386-specific options
     25 #options 	XSERVER		# X server support in console drivers
     26 
     27 # This option allows you to force a serial console at the specified
     28 # I/O address.   see console(4) for details.
     29 #options 	"CONSDEVNAME=\"com\""
     30 
     31 # The following options override the memory sizes passed in from the boot
     32 # block.  Use them *only* if the boot block is unable to determine the correct
     33 # values.  Note that the BIOS may *correctly* report less than 640k of base
     34 # memory if the extended BIOS data area is located at the top of base memory
     35 # (as is the case on most recent systems).
     36 #options 	REALBASEMEM=...	# size of base memory
     37 #options 	REALEXTMEM=...	# size of extended memory
     38 
     39 # Standard system options
     40 
     41 #options 	UCONSOLE	# users can use TIOCCONS (for xconsole)
     42 options 	INSECURE	# disable kernel security levels
     43 
     44 options 	RTC_OFFSET=0	# hardware clock is this many mins. west of GMT
     45 #options 	NTP		# NTP phase/frequency locked loop
     46 
     47 #options 	KTRACE		# system call tracing via ktrace(1)
     48 
     49 #options 	SYSVMSG		# System V-like message queues
     50 #options 	SYSVSEM		# System V-like semaphores
     51 #options 	SYSVSHM		# System V-like memory sharing
     52 #options 	SHMMAXPGS=1024	# 1024 pages is the default
     53 
     54 #options 	LKM		# loadable kernel modules
     55 
     56 # Diagnostic/debugging support options
     57 #options 	DIAGNOSTIC	# cheap kernel consistency checks
     58 #options 	DEBUG		# expensive debugging checks/support
     59 #options 	KMEMSTATS	# kernel memory statistics (vmstat -m)
     60 options 	DDB		# in-kernel debugger
     61 #options 	DDB_HISTORY_SIZE=100	# enable history editing in DDB
     62 #options 	KGDB		# remote debugger
     63 #options 	"KGDB_DEVNAME=\"com\"",KGDBADDR=0x3f8,KGDBRATE=9600
     64 #makeoptions	DEBUG="-g"	# compile full symbol table
     65 
     66 # Compatibility options
     67 options 	COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
     68 options 	COMPAT_09	# NetBSD 0.9,
     69 options 	COMPAT_10	# NetBSD 1.0,
     70 options 	COMPAT_11	# NetBSD 1.1,
     71 options 	COMPAT_12	# NetBSD 1.2,
     72 options 	COMPAT_13	# NetBSD 1.3,
     73 options 	COMPAT_14	# NetBSD 1.4,
     74 options 	COMPAT_43	# and 4.3BSD
     75 options 	COMPAT_386BSD_MBRPART # recognize old partition ID
     76 
     77 #options 	COMPAT_SVR4	# binary compatibility with SVR4
     78 #options 	COMPAT_IBCS2	# binary compatibility with SCO and ISC
     79 #options 	COMPAT_LINUX	# binary compatibility with Linux
     80 #options 	COMPAT_FREEBSD	# binary compatibility with FreeBSD
     81 
     82 options 	COMPAT_AOUT	# binary compat with NetBSD a.out binaries
     83 
     84 # File systems
     85 file-system 	FFS		# UFS
     86 file-system 	EXT2FS		# second extended file system (linux)
     87 #file-system 	LFS		# log-structured file system
     88 file-system 	MFS		# memory file system
     89 file-system 	NFS		# Network File System client
     90 file-system 	CD9660		# ISO 9660 + Rock Ridge file system
     91 file-system 	MSDOSFS		# MS-DOS file system
     92 #file-system 	FDESC		# /dev/fd
     93 file-system 	KERNFS		# /kern
     94 #file-system 	NULLFS		# loopback file system
     95 #file-system 	PORTAL		# portal filesystem (still experimental)
     96 #file-system 	PROCFS		# /proc
     97 #file-system 	UMAPFS		# NULLFS + uid and gid remapping
     98 #file-system 	UNION		# union file system
     99 
    100 # File system options
    101 #options 	QUOTA		# UFS quotas
    102 #options 	FFS_EI		# FFS Endian Independant support
    103 options 	NFSSERVER	# Network File System server
    104 #options 	EXT2FS_SYSTEM_FLAGS # makes ext2fs file flags (append and
    105 				# immutable) behave as system flags.
    106 
    107 # Networking options
    108 #options 	GATEWAY		# packet forwarding
    109 options 	INET		# IP + ICMP + TCP + UDP
    110 #options 	MROUTING	# IP multicast routing
    111 #options 	NS		# XNS
    112 #options 	NSIP		# XNS tunneling over IP
    113 #options 	ISO,TPIP	# OSI
    114 #options 	EON		# OSI tunneling over IP
    115 #options 	CCITT,LLC,HDLC	# X.25
    116 #options 	NETATALK	# AppleTalk networking protocols
    117 #options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP
    118 #options 	PPP_DEFLATE	# Deflate compression support for PPP
    119 #options 	PPP_FILTER	# Active filter support for PPP (requires bpf)
    120 #options 	PFIL_HOOKS	# pfil(9) packet filter hooks
    121 #options 	IPFILTER_LOG	# ipmon(8) log support
    122 
    123 # Compatibility with 4.2BSD implementation of TCP/IP.  Not recommended.
    124 #options 	TCP_COMPAT_42
    125 
    126 # These options enable verbose messages for several subsystems.
    127 # Warning, these may compile large string tables into the kernel!
    128 #options 	EISAVERBOSE	# verbose EISA device autoconfig messages
    129 #options 	PCIVERBOSE	# verbose PCI device autoconfig messages
    130 #options 	PCI_CONFIG_DUMP	# verbosely dump PCI config space
    131 #options 	PCMCIAVERBOSE	# verbose PCMCIA configuration messages
    132 options 	SCSIVERBOSE	# human readable SCSI error messages
    133 #options 	USBVERBOSE	# verbose USB device autoconfig messages
    134 
    135 #options 	NFS_BOOT_BOOTP,NFS_BOOT_BOOTPARAM
    136 
    137 # Kernel root file system and dump configuration.
    138 config		netbsd	root on ? type ?
    139 #config		netbsd	root on sd0a type ffs
    140 #config		netbsd	root on ? type nfs
    141 
    142 #
    143 # Device configuration
    144 #
    145 
    146 mainbus0 at root
    147 
    148 #apm0	at mainbus0			# Advanced power management
    149 
    150 
    151 # Basic Bus Support
    152 
    153 # PCI bus support
    154 #pci*	at mainbus? bus ?
    155 #pci*	at pchb? bus ?
    156 #pci*	at ppb? bus ?
    157 
    158 # PCI bridges
    159 #pchb*	at pci? dev ? function ?	# PCI-Host bridges
    160 #pceb*	at pci? dev ? function ?	# PCI-EISA bridges
    161 #pcib*	at pci? dev ? function ?	# PCI-ISA bridges
    162 #ppb*	at pci? dev ? function ?	# PCI-PCI bridges
    163 # XXX 'puc's aren't really bridges, but there's no better place for them here
    164 #puc*	at pci? dev ? function ?	# PCI "universal" comm. cards
    165 
    166 # EISA bus support
    167 #eisa*	at mainbus?
    168 #eisa*	at pceb?
    169 
    170 # ISA bus support
    171 isa*	at mainbus?
    172 #isa*	at pceb?
    173 #isa*	at pcib?
    174 
    175 # PCMCIA bus support
    176 #pcmcia*	at pcic? controller ? socket ?
    177 
    178 # ISA PCMCIA controllers
    179 #pcic0	at isa? port 0x3e0 iomem 0xd0000 iosiz 0x4000
    180 #pcic1	at isa? port 0x3e2 iomem 0xd4000 iosiz 0x4000
    181 
    182 # ISA Plug-and-Play bus support
    183 isapnp0	at isa?
    184 
    185 # ISA Plug-and-Play PCMCIA controllers
    186 #pcic*	at isapnp?
    187 
    188 # Coprocessor Support
    189 
    190 # Math Coprocessor support
    191 npx0	at isa? port 0xf0 irq 13	# x86 math coprocessor
    192 
    193 
    194 # Console Devices
    195 
    196 # ISA console
    197 pc0	at isa? port 0x60 irq 1		# pccons generic PC console driver
    198 
    199 #pcppi0	at isa?
    200 #sysbeep0	at pcppi?
    201 
    202 # Serial Devices
    203 
    204 # PCI serial interfaces
    205 #com*	at puc? port ?			# 16x50s on "universal" comm boards
    206 #cy*	at pci? dev ? function ?	# Cyclades Cyclom-Y serial boards
    207 
    208 # ISA Plug-and-Play serial interfaces
    209 com*	at isapnp?			# Modems and serial boards
    210 
    211 # PCMCIA serial interfaces
    212 #com*	at pcmcia? function ?		# Modems and serial cards
    213 
    214 # ISA serial interfaces
    215 #options 	COM_HAYESP		# adds Hayes ESP serial board support
    216 com0	at isa? port 0x3f8 irq 4	# Standard PC serial ports
    217 com1	at isa? port 0x2f8 irq 3
    218 com2	at isa? port 0x3e8 irq 5
    219 #com3	at isa? port 0x2e8 irq 9
    220 #ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
    221 #com*	at ast? slave ?
    222 #boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
    223 #com*	at boca? slave ?
    224 #rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
    225 #com*	at rtfps? slave ?
    226 #cy0	at isa? iomem 0xd4000 irq 12	# Cyclades serial cards
    227 
    228 
    229 # Parallel Printer Interfaces
    230 
    231 # PCI parallel printer interfaces
    232 #lpt*	at puc? port ?			# || ports on "universal" comm boards
    233 
    234 # ISA parallel printer interfaces
    235 lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
    236 #lpt1	at isa? port 0x278
    237 #lpt2	at isa? port 0x3bc
    238 
    239 
    240 # SCSI Controllers and Devices
    241 
    242 # PCI SCSI controllers
    243 #ahc*	at pci? dev ? function ?	# Adaptec [23]94x, aic78x0 SCSI
    244 #dpt*	at pci? dev ? function ?	# DPT SmartCache/SmartRAID
    245 #bha*	at pci? dev ? function ?	# BusLogic 9xx SCSI
    246 #isp*	at pci? dev ? function ?	# Qlogic ISP [12]0x0 SCSI/FibreChannel
    247 #ncr*	at pci? dev ? function ?	# NCR 53c8xx SCSI
    248 
    249 # EISA SCSI controllers
    250 #ahb*	at eisa? slot ?			# Adaptec 174[02] SCSI
    251 #ahc*	at eisa? slot ?			# Adaptec 274x, aic7770 SCSI
    252 #bha*	at eisa? slot ?			# BusLogic 7xx SCSI
    253 #dpt*	at eisa? slot ?			# DPT SmartCache/SmartRAID
    254 #uha*	at eisa? slot ?			# UltraStor 24f SCSI
    255 
    256 # PCMCIA SCSI controllers
    257 #aic*	at pcmcia? function ?		# Adaptec APA-1460 SCSI
    258 
    259 # ISA Plug-and-Play SCSI controllers
    260 aic*	at isapnp?			# Adaptec AHA-1520B
    261 
    262 # ISA SCSI controllers
    263 aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI
    264 aha1	at isa? port 0x334 irq ? drq ?
    265 ahc0	at isa? port ? irq ?		# Adaptec 284x SCSI
    266 aic0	at isa? port 0x340 irq 11	# Adaptec 152[02] SCSI
    267 bha0	at isa? port 0x330 irq ? drq ?	# BusLogic [457]4X SCSI
    268 bha1	at isa? port 0x334 irq ? drq ?
    269 sea0	at isa? iomem 0xc8000 irq 5	# Seagate/Future Domain SCSI
    270 uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI
    271 uha1	at isa? port 0x340 irq ? drq ?
    272 wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
    273 wds1	at isa? port 0x358 irq 11 drq 5
    274 
    275 # SCSI bus support
    276 scsibus* at aha?
    277 #scsibus* at ahb?
    278 #scsibus* at ahc?
    279 scsibus* at aic?
    280 scsibus* at bha?
    281 #scsibus* at dpt?
    282 #scsibus* at isp?
    283 #scsibus* at ncr?
    284 scsibus* at sea?
    285 scsibus* at uha?
    286 scsibus* at wds?
    287 
    288 # SCSI devices
    289 sd*	at scsibus? target ? lun ?	# SCSI disk drives
    290 st*	at scsibus? target ? lun ?	# SCSI tape drives
    291 cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
    292 ch*	at scsibus? target ? lun ?	# SCSI autochangers
    293 ss*	at scsibus? target ? lun ?	# SCSI scanners
    294 uk*	at scsibus? target ? lun ?	# SCSI unknown
    295 
    296 
    297 # IDE and related devices
    298 
    299 # ISA Plug-and-Play IDE controllers
    300 wdc*	at isapnp?
    301 
    302 # PCMCIA IDE controllers
    303 #wdc*	at pcmcia? function ?
    304 
    305 # ISA IDE controllers
    306 wdc0	at isa? port 0x1f0 irq 14	# ST506, ESDI, and IDE controllers
    307 wdc1	at isa? port 0x170 irq 15
    308 
    309 # IDE drives
    310 wd*	at wdc? drive ?			# the drives themselves
    311 
    312 # ATAPI bus support
    313 atapibus* at wdc?
    314 
    315 # ATAPI devices
    316 cd*	at atapibus? drive ?		# ATAPI CD-ROM drives
    317 sd*	at atapibus? drive ?		# ATAPI disk drives
    318 
    319 
    320 # Miscellaneous mass storage devices
    321 
    322 # ISA floppy
    323 fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
    324 #fdc1	at isa? port 0x370 irq ? drq ?
    325 fd*	at fdc? drive ?			# the drives themselves
    326 # some machines need you to do this instead of fd*
    327 #fd0	at fdc0 drive 0
    328 
    329 # ISA CD-ROM devices
    330 #mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives
    331 
    332 # ISA tape devices
    333 # note: the wt driver conflicts unpleasantly with SMC boards at the
    334 # same I/O address. The probe reprograms their EEPROMs. Don't
    335 # uncomment it unless you are actually using it.
    336 #wt0	at isa? port 0x308 irq 5 drq 1	# Archive and Wangtek QIC tape drives
    337 
    338 
    339 # Network Interfaces
    340 
    341 # PCI network interfaces
    342 #de*	at pci? dev ? function ?	# DEC 21x4x-based Ethernet
    343 #en*	at pci? dev ? function ?	# ENI/Adaptec ATM
    344 #ep*	at pci? dev ? function ?	# 3Com 3c59x/3c90x Ethernet
    345 #epic*	at pci? dev ? function ?	# SMC EPIC/100 Ethernet
    346 #esh*	at pci? dev ? function ?	# Essential HIPPI card
    347 #fpa*	at pci? dev ? function ?	# DEC DEFPA FDDI
    348 #fxp*	at pci? dev ? function ?	# Intel EtherExpress PRO 10+/100B
    349 #le*	at pci? dev ? function ?	# PCnet-PCI Ethernet
    350 #ne*	at pci? dev ? function ?	# NE2000-compatible Ethernet
    351 #tl*	at pci? dev ? function ?	# ThunderLAN-based Ethernet
    352 
    353 # EISA network interfaces
    354 #ep*	at eisa? slot ?			# 3Com 3c579 Ethernet
    355 #fea*	at eisa? slot ?			# DEC DEFEA FDDI
    356 
    357 # ISA Plug-and-Play network interfaces
    358 ep*	at isapnp?			# 3Com 3c509 Ethernet
    359 ne*	at isapnp?			# NE2000-compatible Ethernet
    360 
    361 # PCMCIA network interfaces
    362 #ep*	at pcmcia? function ?		# 3Com 3c589 and 3c562 Ethernet
    363 #mbe*	at pcmcia? function ?		# MB8696x based Ethernet
    364 #ne*	at pcmcia? function ?		# NE2000-compatible Ethernet
    365 #sm*	at pcmcia? function ?		# Megahertz Ethernet
    366 
    367 # ISA network interfaces
    368 ate0	at isa? port 0x2a0 irq ?		# AT1700
    369 ec0	at isa? port 0x250 iomem 0xd8000 irq 9	# 3Com 3c503 Ethernet
    370 eg0	at isa? port 0x280 irq 9		# 3C505 ethernet cards
    371 el0	at isa? port 0x300 irq 9		# 3C501 ethernet cards
    372 ep0	at isa? port ? irq ?			# 3C509 ethernet cards
    373 ef0	at isa? port 0x360 iomem 0xd0000 irq 7	# 3C507
    374 ai0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN
    375 fmv0	at isa? port 0x2a0 irq ?		# FMV-180 series
    376 ix0	at isa? port 0x300 irq 10		# EtherExpress/16
    377 iy0	at isa? port 0x360 irq ?		# EtherExpress PRO 10 ISA
    378 lc0	at isa? port 0x320 iomem ? irq ?	# DEC EtherWORKS III (LEMAC)
    379 #depca0	at isa? port 0x300 iomem 0xc8000 iosiz 0x8000 irq 5	# DEPCA
    380 #le*	at depca?
    381 nele0	at isa? port 0x320 irq 9 drq 7		# NE2100
    382 le*	at nele?
    383 bicc0	at isa? port 0x320 irq 10 drq 7		# BICC IsoLan
    384 le*	at bicc?
    385 ne0	at isa? port 0x280 irq 9		# NE[12]000 ethernet cards
    386 ne1	at isa? port 0x300 irq 10
    387 sm0	at isa? port 0x300 irq 10		# SMC91C9x Ethernet
    388 we0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC Ethernet
    389 we1	at isa? port 0x300 iomem 0xcc000 irq 10
    390 
    391 # MII bus support
    392 #mii*	at tl?
    393 
    394 # MII PHY network interfaces
    395 #tlphy*	at mii? dev ?			# ThunderLAN PHYs
    396 #nsphy*	at mii? dev ?			# NS and compatible PHYs
    397 
    398 
    399 # USB Controller and Devices
    400 
    401 # PCI USB controllers
    402 #uhci*	at pci?				# Universal Host Controller (Intel)
    403 #ohci*	at pci?				# Open Host Controller
    404 
    405 # USB bus support
    406 #usb*	at uhci?
    407 #usb*	at ohci?
    408 
    409 # USB Hubs
    410 #uhub*	at usb?
    411 #uhub*	at uhub? port ?
    412 
    413 # USB Mice
    414 #ums*	at uhub? port ?
    415 
    416 # USB Keyboards
    417 #ukbd*	at uhub? port ?
    418 
    419 # USB Generic HID devices
    420 #uhid*	at uhub? port ?
    421 
    422 # USB Printer
    423 #ulpt*	at uhub? port ?
    424 
    425 # USB Mass Storage
    426 #umass*	at uhub? port ? configuration ? interface ?
    427 #atapibus* at umass? channel ?
    428 #scsibus* at umass? channel ?
    429 
    430 # USB Ethernet adapters
    431 #aue*	at uhub? port ?		# ADMtek AN986 Pegasus based adapters
    432 #cue*	at uhub? port ?		# CATC USB-EL1201A based adapters
    433 #kue*	at uhub? port ?		# Kawasaki LSI KL5KUSB101B based adapters
    434 
    435 # USB Generic driver
    436 #ugen*	at uhub? port ?
    437 
    438 # Audio Devices
    439 
    440 # PCI audio devices
    441 #eap*	at pci? dev ? function ?	# Ensoniq AudioPCI
    442 
    443 # ISA Plug-and-Play audio devices
    444 #guspnp*	at isapnp?			# Gravis Ultra Sound PnP audio
    445 #sb*	at isapnp?			# SoundBlaster-compatible audio
    446 #ym*	at isapnp?			# Yamaha OPL3-SA3 audio
    447 
    448 # ISA audio devices
    449 #aria0	at isa? port 0x290 irq 10 		# Aria
    450 #gus0	at isa? port 0x220 irq 7 drq 1 drq2 6	# Gravis Ultra Sound
    451 #pas0	at isa? port 0x220 irq 7 drq 1		# ProAudio Spectrum
    452 #pss0	at isa? port 0x220 irq 7 drq 6  	# Personal Sound System
    453 #sp0	at pss0 port 0x530 irq 10 drq 0		# 	sound port driver
    454 #sb0	at isa? port 0x220 irq 5 drq 1 drq2 5	# SoundBlaster
    455 #wss0	at isa? port 0x530 irq 10 drq 0	drq2 1	# Windows Sound System
    456 
    457 # Audio support
    458 #audio*	at aria?
    459 #audio*	at eap?
    460 #audio*	at gus?
    461 #audio*	at guspnp?
    462 #audio*	at pas?
    463 #audio*	at sb?
    464 #audio*	at sp?
    465 #audio*	at wss?
    466 #audio*	at ym?
    467 
    468 # The spkr driver provides a simple tone interface to the built in speaker.
    469 #spkr0	at pcppi?		# PC speaker
    470 
    471 
    472 # Mice
    473 
    474 # ISA busmice
    475 #olms0	at isa? port 0x23c irq 5	# Logitech bus mouse
    476 #olms1	at isa? port 0x238 irq 5
    477 #omms0	at isa? port 0x23c irq 5	# Microsoft InPort mouse
    478 #omms1	at isa? port 0x238 irq 5
    479 #opms0	at pc? irq 12		# PS/2 auxiliary port mouse
    480 
    481 
    482 # Joysticks
    483 
    484 # ISA Plug-and-Play joysticks
    485 #joy*	at isapnp?			# Game ports (usually on audio cards)
    486 
    487 # ISA joysticks. Probe is a little strange; add only if you have one.
    488 #joy0	at isa? port 0x201
    489 
    490 
    491 # Miscellaneous Devices
    492 
    493 # Planetconnect Satellite receiver driver.
    494 #satlink0 at isa? port 0x300 drq 1
    495 
    496 
    497 # Pull in optional local configuration
    498 include	"arch/i386/conf/GENERIC.local"
    499 
    500 
    501 # Pseudo-Devices
    502 
    503 # disk/mass storage pseudo-devices
    504 pseudo-device	ccd		4	# concatenated/striped disk devices
    505 pseudo-device	md		1	# memory disk device (ramdisk)
    506 pseudo-device	vnd		4	# disk-like interface to files
    507 
    508 # network pseudo-devices
    509 pseudo-device	bpfilter	8	# Berkeley packet filter
    510 pseudo-device	ipfilter		# IP filter (firewall) and NAT
    511 pseudo-device	loop			# network loopback
    512 pseudo-device	ppp		2	# Point-to-Point Protocol
    513 pseudo-device	sl		2	# Serial Line IP
    514 pseudo-device	strip		2	# Starmode Radio IP (Metricom)
    515 pseudo-device	tun		2	# network tunneling over tty
    516 
    517 # miscellaneous pseudo-devices
    518 pseudo-device	pty		16	# pseudo-terminals
    519 pseudo-device	tb		1	# tablet line discipline
    520 pseudo-device	rnd			# /dev/random and in-kernel generator
    521 #options 	RND_COM			# use "com" randomness as well (BROKEN)
    522