xref: /netbsd-src/sys/arch/i386/conf/INSTALL_TINY (revision b8ecfcfef0e343ad71faea7a54fb5fcb42ad4e27)
1#	$NetBSD: INSTALL_TINY,v 1.143 2014/08/23 21:10:20 dholland Exp $
2#
3#	This kernel should be derived from INSTALL (which is derived
4#	from GENERIC) with some features commented out.
5#
6#	This kernel has been optimized for space. It is targeted towards
7#	small memory machines (4M). It has no SCSI, PCI or EISA. It does
8#	have pcmcia, for old laptops.
9#
10
11include "arch/i386/conf/std.i386"
12
13#options 	INCLUDE_CONFIG_FILE	# embed config file in kernel binary
14
15makeoptions	COPTS="-Os"		# Optimise for space. Implies -O2
16makeoptions	USE_SSP="no"
17
18# Enable the hooks used for initializing the root memory-disk.
19options 	MEMORY_DISK_HOOKS
20options 	MEMORY_DISK_IS_ROOT	# force root on memory disk
21options 	MEMORY_DISK_SERVER=0	# no userspace memory disk support
22options 	MEMORY_DISK_ROOT_SIZE=3100	# size of memory disk, in blocks
23options 	MEMORY_DISK_RBFLAGS=RB_SINGLE	# boot in single-user mode
24
25maxusers	2		# estimated number of users
26
27# CPU-related options.
28#options 	VM86		# virtual 8086 emulation
29#options 	USER_LDT	# user-settable LDT; used by WINE
30
31# This option allows you to force a serial console at the specified
32# I/O address.
33#options 	CONSDEVNAME="\"com\"",CONADDR=0x3f8,CONSPEED=9600
34
35# The following options override the memory sizes passed in from the boot
36# block.  Use them *only* if the boot block is unable to determine the correct
37# values.  Note that the BIOS may *correctly* report less than 640k of base
38# memory if the extended BIOS data area is located at the top of base memory
39# (as is the case on most recent systems).
40#options 	REALBASEMEM=...	# size of base memory
41#options 	REALEXTMEM=...	# size of extended memory
42
43options 	INSECURE	# disable kernel security levels
44
45options 	RTC_OFFSET=0	# hardware clock is this many mins. west of GMT
46#options 	NTP		# NTP phase/frequency locked loop
47
48#options 	KTRACE		# system call tracing via ktrace(1)
49
50#options 	SYSVSEM		# System V-like semaphores
51#options 	SYSVSHM		# System V-like memory sharing
52
53#options 	USERCONF	# userconf(4) support
54options 	PIPE_SOCKETPAIR		# smaller, but slower pipe(2)
55#options 	SYSCTL_INCLUDE_DESCR	# Include sysctl descriptions in kernel
56no options 	EXEC_AOUT	# we don't a.out support
57
58# Diagnostic/debugging support options
59#options 	DIAGNOSTIC	# inexpensive kernel consistency checks
60#options 	DEBUG		# expensive debugging checks/support
61#options 	KMEMSTATS	# kernel memory statistics (vmstat -m)
62#options 	DDB		# in-kernel debugger
63#options 	DDB_ONPANIC=1	# see also sysctl(7): `ddb.onpanic'
64#options 	DDB_HISTORY_SIZE=512	# enable history editing in DDB
65#options 	KGDB		# remote debugger
66#options 	KGDB_DEVNAME="\"com\"",KGDB_DEVADDR=0x3f8,KGDB_DEVRATE=9600
67#makeoptions	DEBUG="-g"	# compile full symbol table
68
69# Compatibility options
70#options 	COMPAT_NOMID	# NetBSD 0.8, 386BSD, and BSDI
71#options 	COMPAT_09	# NetBSD 0.9,
72#options 	COMPAT_10	# NetBSD 1.0,
73#options 	COMPAT_11	# NetBSD 1.1,
74#options 	COMPAT_12	# NetBSD 1.2 (and 386BSD and BSDI),
75#options 	COMPAT_13	# NetBSD 1.3 (and 386BSD and BSDI),
76#options 	COMPAT_14	# NetBSD 1.4,
77#options 	COMPAT_15	# NetBSD 1.5,
78#options 	COMPAT_16	# NetBSD 1.6,
79#options 	COMPAT_20	# NetBSD 2.0,
80#options 	COMPAT_30	# NetBSD 3.0,
81#options 	COMPAT_40	# NetBSD 4.0,
82#options 	COMPAT_50	# NetBSD 5.0,
83#options 	COMPAT_60	# NetBSD 6.0, and
84#options 	COMPAT_70	# NetBSD 7.0 binary compatibility.
85#options 	COMPAT_43	# 4.3BSD, 386BSD, and BSDI compatibility.
86#options 	COMPAT_386BSD_MBRPART # recognize old partition ID
87#options 	TCP_COMPAT_42	# 4.2BSD TCP/IP bug compat. Not recommended.
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
93options 	COMPAT_BSDPTY	# /dev/[pt]ty?? ptys.
94
95# File systems
96file-system	FFS		# UFS
97#file-system	EXT2FS		# second extended file system (linux)
98#file-system	LFS		# log-structured file system
99#file-system	MFS		# memory file system
100file-system	NFS		# Network File System client
101file-system	CD9660		# ISO 9660 + Rock Ridge file system
102file-system	MSDOSFS		# MS-DOS file system
103#file-system	FDESC		# /dev/fd
104#file-system	KERNFS		# /kern
105#file-system	NULLFS		# loopback file system
106#file-system	PROCFS		# /proc
107#file-system	UMAPFS		# NULLFS + uid and gid remapping
108#file-system	UNION		# union file system
109#file-system	PTYFS		# /dev/pts/N support
110#file-system	TMPFS		# Efficient memory file-system
111
112# Filesystem options
113#options 	QUOTA		# legacy UFS quotas
114#options 	QUOTA2		# new, in-filesystem UFS quotas
115#options 	NFSSERVER	# Network File System server
116options 	NFS_V2_ONLY	# Exclude NFS3 code to save space
117options 	FFS_NO_SNAPSHOT	# No FFS snapshot support
118#options 	EXT2FS_SYSTEM_FLAGS # makes ext2fs file flags (append and
119				# immutable) behave as system flags.
120
121# Networking options
122#options 	GATEWAY		# packet forwarding
123options 	INET		# IP + ICMP + TCP + UDP
124#options 	MROUTING	# IP multicast routing
125#options 	PIM		# Protocol Independent Multicast
126#options 	NETATALK	# AppleTalk networking protocols
127#options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP
128#options 	PPP_DEFLATE	# Deflate compression support for PPP
129#options 	PPP_FILTER	# Active filter support for PPP (requires bpf)
130#options 	TCP_DEBUG	# Record last TCP_NDEBUG packets with SO_DEBUG
131
132# These options enable verbose messages for several subsystems.
133# Warning, these may compile large string tables into the kernel!
134#options 	EISAVERBOSE	# verbose EISA device autoconfig messages
135#options 	PCIVERBOSE	# verbose PCI device autoconfig messages
136#options 	PCI_CONFIG_DUMP	# verbosely dump PCI config space
137#options 	PCMCIAVERBOSE	# verbose PCMCIA configuration messages
138#options 	SCSIVERBOSE	# human readable SCSI error messages
139
140# Squeeze...
141options 	NVNODE=50
142options 	NBUF=20
143options 	BUFPAGES=20
144
145# Kernel root file system and dump configuration.
146config		netbsd	root on ? type ?
147#config		netbsd	root on sd0a type ffs
148#config		netbsd	root on ? type nfs
149
150#
151# wscons options
152#
153# builtin terminal emulations
154#options 	WSEMUL_SUN		# sun terminal emulation
155options 	WSEMUL_VT100		# VT100 / VT220 emulation
156# customization of console and kernel output - see dev/wscons/wsdisplayvar.h
157#options 	WSDISPLAY_CUSTOM_OUTPUT	# color customization from wsconsctl(8)
158#options 	WS_DEFAULT_FG=WSCOL_WHITE
159#options 	WS_DEFAULT_BG=WSCOL_BLACK
160#options 	WS_DEFAULT_COLATTR="(0)"
161#options 	WS_DEFAULT_MONOATTR="(0)"
162options 	WS_KERNEL_FG=WSCOL_GREEN
163#options 	WS_KERNEL_BG=WSCOL_BLACK
164#options 	WS_KERNEL_COLATTR=""
165#options 	WS_KERNEL_MONOATTR=""
166# customization of console border color
167#options 	WSDISPLAY_CUSTOM_BORDER	# border customization from wsconsctl(8)
168#options 	WSDISPLAY_BORDER_COLOR=WSCOL_BLUE	# default color
169# compatibility to other console drivers
170options 	WSDISPLAY_COMPAT_PCVT		# emulate some ioctls
171options 	WSDISPLAY_COMPAT_SYSCONS	# emulate some ioctls
172options 	WSDISPLAY_COMPAT_USL		# wsconscfg VT handling
173options 	WSDISPLAY_COMPAT_RAWKBD		# can get raw scancodes
174# see dev/pckbport/wskbdmap_mfii.c for implemented layouts
175#options 	PCKBD_LAYOUT="(KB_DE | KB_NODEAD)" # for pckbd driver
176#options 	UKBD_LAYOUT="(KB_DE | KB_NODEAD)"  # for ukbd driver
177# allocate a number of virtual screens at autoconfiguration time
178#options 	WSDISPLAY_DEFAULTSCREENS=4
179# use a large software cursor that doesn't blink
180options 	PCDISPLAY_SOFTCURSOR
181
182#
183# Device configuration
184#
185
186#apm0	at mainbus0			# Advanced power management
187
188
189# Basic Bus Support
190
191# PCI bus support
192#pci*	at mainbus? bus ?
193#pci*	at pchb? bus ?
194#pci*	at ppb? bus ?
195
196# PCI bridges
197#pchb*	at pci? dev ? function ?	# PCI-Host bridges
198#pceb*	at pci? dev ? function ?	# PCI-EISA bridges
199#pcib*	at pci? dev ? function ?	# PCI-ISA bridges
200#ppb*	at pci? dev ? function ?	# PCI-PCI bridges
201# XXX 'puc's aren't really bridges, but there's no better place for them here
202#puc*	at pci? dev ? function ?	# PCI "universal" comm. cards
203
204# As well as 5 and 7, avoid irq 4 and 3 because we do not probe com* here
205options 	PCIC_ISA_INTR_ALLOC_MASK=0xff47
206
207# PCMCIA bus support
208pcmcia* at pcic? controller ? socket ?
209#pcmcia* at tcic? controller ? socket ?
210
211# ISA PCMCIA controllers
212pcic0	at isa? port 0x3e0 iomem 0xd0000 iosiz 0x10000
213pcic1	at isa? port 0x3e2 iomem 0xe0000 iosiz 0x4000
214
215# EISA bus support
216#eisa0	at mainbus?
217#eisa0	at pceb?
218
219# ISA bus support
220isa0	at mainbus?
221#isa0	at pceb?
222#isa0	at pcib?
223
224# ISA Plug-and-Play bus support
225#isapnp0 at isa?
226
227
228# Console Devices
229
230# wscons
231pckbc0		at isa?			# PC keyboard controller
232pckbd*		at pckbc?		# PC keyboard
233pcdisplay0	at isa?			# CGA, MDA, EGA, HGA
234wsdisplay*	at pcdisplay? console ?
235wskbd*		at pckbd? console ?
236#wsmouse*	at pms? mux 0
237
238# Serial Devices
239
240# PCI serial interfaces
241#com*	at puc? port ?			# 16x50s on "universal" comm boards
242#cy*	at pci? dev ? function ?	# Cyclades Cyclom-Y serial boards
243
244# ISA Plug-and-Play serial interfaces
245#com*	at isapnp?			# Modems and serial boards
246
247# PCMCIA serial interfaces
248#com*	at pcmcia? function ?		# Modems and serial cards
249
250# ISA serial interfaces
251#options 	COM_HAYESP		# adds Hayes ESP serial board support
252#com0	at isa? port 0x3f8 irq 4	# Standard PC serial ports
253#com1	at isa? port 0x2f8 irq 3
254#com2	at isa? port 0x3e8 irq 5
255#com3	at isa? port 0x2e8 irq 9
256#ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
257#com*	at ast? slave ?
258#boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
259#com*	at boca? slave ?
260#rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
261#com*	at rtfps? slave ?
262#cy0	at isa? iomem 0xd4000 irq 12	# Cyclades serial cards
263
264
265# Parallel Printer Interfaces
266
267# PCI parallel printer interfaces
268#lpt*	at puc? port ?			# || ports on "universal" comm boards
269
270# ISA parallel printer interfaces
271#lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
272#lpt1	at isa? port 0x278
273#lpt2	at isa? port 0x3bc
274
275# I2O devices
276#iop*	at pci? dev ? function ?	# I/O processor
277#iopsp*	at iop? tid ?			# SCSI/FC-AL ports
278#ld*	at iop? tid ?			# block devices
279#dpti*	at iop? tid 0			# DPT/Adaptec control interface
280
281# SCSI Controllers and Devices
282
283# PCI SCSI controllers
284#ahc*	at pci? dev ? function ?	# Adaptec [23]94x, aic78x0 SCSI
285#bha*	at pci? dev ? function ?	# BusLogic 9xx SCSI
286#dpt*	at pci? dev ? function ?	# DPT SmartCache/SmartRAID
287#isp*	at pci? dev ? function ?	# Qlogic ISP [12]0x0 SCSI/FibreChannel
288#mly*	at pci? dev ? function ?	# Mylex AcceleRAID and eXtremeRAID
289#siop*	at pci? dev ? function ?	# NCR 53c8xx SCSI
290
291# EISA SCSI controllers
292#ahb*	at eisa? slot ?			# Adaptec 174[02] SCSI
293#ahc*	at eisa? slot ?			# Adaptec 274x, aic7770 SCSI
294#bha*	at eisa? slot ?			# BusLogic 7xx SCSI
295#dpt*	at eisa? slot ?			# DPT SmartCache/SmartRAID
296#uha*	at eisa? slot ?			# UltraStor 24f SCSI
297
298# PCMCIA SCSI controllers
299#aic*	at pcmcia? function ?		# Adaptec APA-1460 SCSI
300
301# ISA Plug-and-Play SCSI controllers
302#aic*	at isapnp?			# Adaptec AHA-1520B
303
304# ISA SCSI controllers
305#aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI
306#aha1	at isa? port 0x334 irq ? drq ?
307#ahc0	at isa? port ? irq ?		# Adaptec 284x SCSI
308#aic0	at isa? port 0x340 irq 11	# Adaptec 152[02] SCSI
309#bha0	at isa? port 0x330 irq ? drq ?	# BusLogic [457]4X SCSI
310#bha1	at isa? port 0x334 irq ? drq ?
311# The "nca" and "dpt" probes might give false hits or hang your machine.
312#dpt0	at isa? port 0x170 irq ? drq ?	# DPT SmartCache/SmartRAID
313#nca0	at isa? port 0x360 irq 15	# Port-mapped NCR 53C80 controller
314#nca1	at isa? iomem 0xd8000 irq 5	# Memory-mapped controller (T128, etc.)
315#sea0	at isa? iomem 0xc8000 irq 5	# Seagate/Future Domain SCSI
316#uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI
317#uha1	at isa? port 0x340 irq ? drq ?
318#wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
319#wds1	at isa? port 0x358 irq 11 drq 5
320
321# SCSI bus support
322#scsibus* at scsi?
323
324# SCSI devices
325#sd*	at scsibus? target ? lun ?	# SCSI disk drives
326#st*	at scsibus? target ? lun ?	# SCSI tape drives
327#cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
328#ch*	at scsibus? target ? lun ?	# SCSI autochangers
329#ss*	at scsibus? target ? lun ?	# SCSI scanners
330#uk*	at scsibus? target ? lun ?	# SCSI unknown
331
332
333# RAID controllers and devices
334#aac*	at pci? dev ? function ?	# Adaptec AAC family
335#cac*	at eisa? slot ?			# Compaq EISA array controllers
336#cac*	at pci? dev ? function ?	# Compaq PCI array controllers
337#ciss*	at pci? dev ? function ?	# HP Smart Array controllers
338#icp*	at pci? dev ? function ?	# ICP-Vortex GDT & Intel RAID
339#mlx*	at pci? dev ? function ?	# Mylex DAC960 & DEC SWXCR family
340#mlx*	at eisa? slot ?			# Mylex DAC960 & DEC SWXCR family
341#twe*	at pci? dev ? function ?	# 3ware Escalade RAID controllers
342
343#ld*	at aac? unit ?			# logical disk devices
344#ld*	at cac? unit ?
345#ld*	at icp? unit ?
346#ld*	at twe? unit ?
347#ld*	at mlx? unit ?
348
349#icpsp*	at icp? unit ?			# SCSI pass-through
350
351
352# IDE and related devices
353
354# PCMCIA IDE controllers
355wdc*	at pcmcia? function ?
356
357# ST506, ESDI, and ISA IDE controllers
358# Use flags 0x01 if you want to try to use 32bits data I/O (the driver will
359# fall back to 16bits I/O if 32bits I/O are not functional).
360# Some controllers pass the initial 32bit test, but will fail later.
361wdc0	at isa? port 0x1f0 irq 14 flags 0x00
362wdc1	at isa? port 0x170 irq 15 flags 0x00
363
364# ATA (IDE) bus support
365atabus* at ata?
366
367# IDE drives
368wd*	at atabus? drive ?		# the drives themselves
369
370# ATAPI bus support
371atapibus* at atapi?
372
373# ATAPI devices
374cd*	at atapibus? drive ?		# ATAPI CD-ROM drives
375#sd*	at atapibus? drive ?		# ATAPI disk drives
376
377
378# Miscellaneous mass storage devices
379
380# ISA floppy
381fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
382#fdc1	at isa? port 0x370 irq ? drq ?
383fd*	at fdc? drive ?			# the drives themselves
384# some machines need you to do this instead of fd*
385#fd0	at fdc0 drive 0
386
387# ISA CD-ROM devices
388#mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives
389
390# ISA tape devices
391# note: the wt driver conflicts unpleasantly with ed devices at the
392# same I/O address. The probe reprograms their EEPROMs. Don't
393# uncomment it unless you are actually using it.
394#wt0	at isa? port 0x308 irq 5 drq 1	# Archive and Wangtek QIC tape drives
395
396
397# Network Interfaces
398
399# PCI network interfaces
400#en*	at pci? dev ? function ?	# ENI/Adaptec ATM
401#ep*	at pci? dev ? function ?	# 3Com 3c59x/3c90x Ethernet
402#fpa*	at pci? dev ? function ?	# DEC DEFPA FDDI
403#fxp*	at pci? dev ? function ?	# Intel EtherExpress PRO 10+/100B
404#le*	at pci? dev ? function ?	# PCnet-PCI Ethernet
405#ne*	at pci? dev ? function ?	# NE2000-compatible Ethernet
406#tl*	at pci? dev ? function ?	# ThunderLAN-based Ethernet
407#tlp*	at pci? dev ? function ?	# DECchip 21x4x and clones
408
409# EISA network interfaces
410#ep*	at eisa? slot ?			# 3Com 3c579 Ethernet
411#fea*	at eisa? slot ?			# DEC DEFEA FDDI
412
413# ISA Plug-and-Play network interfaces
414#ep*	at isapnp?			# 3Com 3c509 Ethernet
415#ne*	at isapnp?			# NE2000-compatible Ethernet
416
417# PCMCIA network interfaces
418ep*	at pcmcia? function ?		# 3Com 3c589 and 3c562 Ethernet
419mbe*	at pcmcia? function ?		# MB8696x based Ethernet
420ne*	at pcmcia? function ?		# NE2000-compatible Ethernet
421sm*	at pcmcia? function ?		# Megahertz Ethernet
422
423# ISA network interfaces
424ate0	at isa? port 0x2a0 irq ?		# AT1700
425ec0	at isa? port 0x250 iomem 0xd8000 irq 9	# 3Com 3c503 Ethernet
426#eg0	at isa? port 0x280 irq 9		# 3c505 Ethernet cards
427#el0	at isa? port 0x300 irq 9		# 3c501 Ethernet cards
428ep0	at isa? port ? irq ?			# 3c509 Ethernet cards
429#ef0	at isa? port 0x360 iomem 0xd0000 irq 7	# 3c507
430ai0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN
431fmv0	at isa? port 0x2a0 irq ?		# FMV-180 series
432ix0	at isa? port 0x300 irq 10		# EtherExpress/16
433iy0	at isa? port 0x360 irq ?		# EtherExpress PRO 10 ISA
434lc0	at isa? port 0x320 iomem ? irq ?	# DEC EtherWORKS III (LEMAC)
435#depca0	at isa? port 0x300 iomem 0xc8000 iosiz 0x8000 irq 5	# DEPCA
436#le*	at depca?
437#nele0	at isa? port 0x320 irq 9 drq 7		# NE2100
438#le*	at nele?
439#bicc0	at isa? port 0x320 irq 10 drq 7		# BICC IsoLan
440#le*	at bicc?
441ne0	at isa? port 0x280 irq 9		# NE[12]000 Ethernet cards
442ne1	at isa? port 0x300 irq 10
443sm0	at isa? port 0x300 irq 10		# SMC91C9x Ethernet
444we0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC Ethernet
445we1	at isa? port 0x300 iomem 0xcc000 irq 10
446
447# MII bus support
448#mii*	at tl?
449
450# MII PHY network interfaces
451#tlphy*	at mii? dev ?			# ThunderLAN PHYs
452#nsphy*	at mii? dev ?			# NS and compatible PHYs
453#ukphy*	at mii? phy ?			# generic unknown PHYs
454
455
456# Audio Devices
457
458# ISA Plug-and-Play audio devices
459#guspnp* at isapnp?			# Gravis Ultra Sound PnP audio
460#sb*	at isapnp?			# SoundBlaster-compatible audio
461
462# ISA audio devices
463#gus0	at isa? port 0x220 irq 7 drq 1 drq2 6	# Gravis Ultra Sound
464#pas0	at isa? port 0x220 irq 7 drq 1		# ProAudio Spectrum
465#sb0	at isa? port 0x220 irq 7 drq 1 drq2 5	# SoundBlaster
466#wss0	at isa? port 0x530 irq 10 drq 0	drq2 1	# Windows Sound System
467
468# Audio support
469#audio*	at audiobus?
470
471# The spkr driver provides a simple tone interface to the built in speaker.
472#spkr0	at pcppi?		# PC speaker
473
474
475# Joysticks
476
477# ISA Plug-and-Play joysticks
478#joy*	at isapnp?			# Game ports (usually on audio cards)
479
480# ISA joysticks. Probe is a little strange; add only if you have one.
481#joy0	at isa? port 0x201
482
483
484# Miscellaneous Devices
485
486# Planetconnect Satellite receiver driver.
487#satlink0 at isa? port 0x300 drq 1
488
489
490# Pull in optional local configuration
491cinclude "arch/i386/conf/INSTALL.local"
492
493
494# Pseudo-Devices
495
496# disk/mass storage pseudo-devices
497#pseudo-device	ccd			# concatenated/striped disk devices
498#pseudo-device	fss			# file system snapshot device
499pseudo-device	md			# memory disk device (ramdisk)
500#pseudo-device	vnd			# disk-like interface to files
501
502# network pseudo-devices
503#pseudo-device	bpfilter		# Berkeley packet filter
504#pseudo-device	ipfilter		# IP filter (firewall) and NAT
505pseudo-device	loop			# network loopback
506#pseudo-device	ppp			# Point-to-Point Protocol
507#pseudo-device	sl			# Serial Line IP
508#pseudo-device	strip			# Starmode Radio IP (Metricom)
509#pseudo-device	tun			# network tunneling over tty
510
511# miscellaneous pseudo-devices
512pseudo-device	pty			# pseudo-terminals
513options 	NO_DEV_PTM
514#options 	RND_COM			# use "com" randomness as well (BROKEN)
515