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GENERIC revision 1.11
      1  1.11    eeh # 	$NetBSD: GENERIC,v 1.11 1999/01/23 19:09:00 eeh Exp $
      2   1.1    eeh 
      3   1.1    eeh include "arch/sparc64/conf/std.sparc64"
      4   1.1    eeh 
      5   1.1    eeh maxusers	32
      6   1.1    eeh 
      7   1.1    eeh ## System kernel configuration.  See options(4) for more detail.
      8   1.1    eeh 
      9   1.1    eeh 
     10   1.1    eeh # Options for variants of the Sun SPARC architecure.
     11   1.1    eeh # We currently support three architecture types; at least one is required.
     12   1.1    eeh options		SUN4U		# sun4u - Ultra 140 and 170
     13   1.1    eeh options		TRAPWIN
     14  1.10    eeh options		__ELF__		# we use elf 
     15  1.10    eeh #options		_LP64		# we're using a 64-bit compiler
     16   1.1    eeh 
     17   1.1    eeh ## System options specific to the sparc machine type
     18   1.1    eeh 
     19   1.1    eeh ## Use a faster console than the PROM's slow drawing routines.  Not needed
     20   1.1    eeh ## for headless (no framebuffer) machines.
     21   1.3    mrg # XXX broken on sparc64
     22   1.3    mrg #options 	RASTERCONSOLE	# fast rasterop console
     23   1.1    eeh 
     24   1.1    eeh 
     25   1.1    eeh #### System options that are the same for all ports
     26   1.1    eeh 
     27   1.1    eeh ## Root device configuration: change the ?'s if you are going to use a
     28   1.1    eeh ## nonstandard root partition (other than where the kernel is booted from)
     29   1.1    eeh ## and/or nonstandard root type (not ffs or nfs).  Normally this can be
     30   1.1    eeh ## automagically determined at boot time.
     31   1.1    eeh 
     32   1.1    eeh config		netbsd	root on ? type ?
     33   1.1    eeh 
     34   1.4    mrg ## UVM options.
     35  1.10    eeh #options	UVM_PAGE_TRKOWN
     36   1.6    mrg #options 	UVMHIST
     37   1.4    mrg #options 	UVMHIST_PRINT	# Loud!
     38  1.10    eeh options 	PMAP_NEW
     39   1.1    eeh 
     40   1.1    eeh ## System call tracing (see ktrace(1)).
     41   1.1    eeh options 	KTRACE
     42   1.1    eeh 
     43   1.1    eeh ## Collect statistics on kernel malloc's and free's.  This does have a
     44   1.1    eeh ## significant performance hit on slower machines, so it is intended for
     45   1.1    eeh ## diagnostic use only.
     46   1.1    eeh #options 	KMEMSTATS
     47   1.1    eeh 
     48   1.1    eeh ## System V compatible IPC subsystem.  (msgctl(2), semctl(2), and shmctl(2))
     49   1.1    eeh options 	SYSVMSG		# System V message queues
     50   1.1    eeh options 	SYSVSEM		# System V semaphores
     51   1.1    eeh options 	SYSVSHM		# System V shared memory
     52   1.1    eeh #options 	SHMMAXPGS=1024	# 1024 pages is the default
     53   1.1    eeh 
     54   1.1    eeh ## Loadable kernel module support; still under development.
     55   1.1    eeh options 	LKM
     56   1.1    eeh 
     57   1.1    eeh ## NFS boot options; default on sparc is the bootparam protocol
     58   1.1    eeh options 	NFS_BOOT_BOOTPARAM
     59   1.1    eeh #options 	NFS_BOOT_BOOTP
     60   1.1    eeh #options 	NFS_BOOT_DHCP
     61   1.1    eeh 
     62   1.1    eeh #### Debugging options
     63   1.1    eeh 
     64   1.1    eeh ## The DDB in-kernel debugger runs at panic (unless DDB_ONPANIC=0), or at
     65   1.1    eeh ## serial console break or keyboard reset, where the PROM would normally
     66   1.1    eeh ## intercept.  DDB_HISTORY_SIZE adds up/down arrow command history.
     67   1.9    mrg # we enable DDB in GENERIC for now.
     68   1.9    mrg options 	DDB			# kernel dynamic debugger
     69   1.1    eeh #options 	DDB_HISTORY_SIZE=100	# enable history editing in DDB
     70   1.1    eeh #options 	DDB_ONPANIC		# see also sysctl(8): `ddb.onpanic'
     71   1.1    eeh 
     72   1.1    eeh ## You may also use gdb, on another computer connected to this machine over
     73   1.1    eeh ## a serial port.  Both KGDBDEV and KGDBRATE should be specified; KGDBDEV is
     74   1.1    eeh ## a dev_t encoded device number of the serial port to use.
     75   1.1    eeh ## (0xc01 = ttya, 0xc02 = ttyb.)
     76   1.1    eeh #options 	KGDB		# support for kernel gdb
     77   1.1    eeh #options 	KGDBDEV=0xc01	# kgdb device number (this sample is `ttyb')
     78   1.1    eeh #options 	KGDBRATE=38400	# baud rate
     79   1.1    eeh 
     80   1.1    eeh 
     81   1.1    eeh ## Compile the kernel with debugging symbols (`netbsd.gdb' is the debug file),
     82   1.1    eeh ## such that gdb(1) can be used on a kernel coredump.
     83   1.1    eeh 
     84   1.1    eeh #makeoptions 	DEBUG="-g"
     85   1.1    eeh 
     86   1.1    eeh 
     87   1.1    eeh ## Adds code to the kernel that does internal consistency checks, and will
     88   1.1    eeh ## cause the kernel to panic if corruption of internal data structures
     89   1.1    eeh ## is detected.
     90   1.1    eeh #options 	DIAGNOSTIC	# extra kernel sanity checking
     91   1.1    eeh 
     92   1.1    eeh ## Enable (possibly expensive) debugging code that may also display messages
     93   1.1    eeh ## on the system console
     94   1.1    eeh #options 	DEBUG
     95   1.1    eeh 
     96   1.1    eeh ## Make SCSI error messages more verbose when explaining their meanings.
     97   1.1    eeh options 	SCSIVERBOSE
     98   1.1    eeh 
     99   1.1    eeh ## `INSECURE' turns off the kernel security level (securelevel = 0 always).
    100   1.1    eeh ## This allows writing to /dev/mem, loading kernel modules while multi-user,
    101   1.1    eeh ## and other insecurities good only for development work.  Do not use this
    102   1.1    eeh ## option on a production machine.
    103   1.1    eeh #options 	INSECURE
    104   1.1    eeh 
    105   1.1    eeh ## Allow non-root users to grab /dev/console with programs such as xconsole.
    106   1.1    eeh ## `xconsole' therefore does not need setuid root with this option enabled.
    107   1.1    eeh #options 	UCONSOLE
    108   1.1    eeh 
    109   1.1    eeh ## `FDSCRIPTS' allows non-readable but executable scripts by providing a
    110   1.1    eeh ## pre-opened opaque file to the script interpreter.  `SETUIDSCRIPTS',
    111   1.1    eeh ## which implies FDSCRIPTS, allows scripts to be set-user-id using the same
    112   1.1    eeh ## opaque file mechanism.  Perl calls this "secure setuid scripts."
    113   1.1    eeh 
    114   1.1    eeh #options 	FDSCRIPTS
    115   1.1    eeh #options 	SETUIDSCRIPTS
    116   1.1    eeh 
    117   1.1    eeh ## Options for compatibility with previous releases foreign system binaries.
    118   1.1    eeh ## In the cases of COMPAT_SUNOS and COMPAT_SVR4, you may need to set up
    119   1.1    eeh ## additional user-level utilities or system configuration files. See
    120   1.1    eeh ## compat_sunos(8) and compat_svr4(8).
    121   1.1    eeh 
    122   1.1    eeh options 	COMPAT_43	# 4.3BSD system interfaces
    123   1.1    eeh options 	COMPAT_10	# NetBSD 1.0 binary compatibility
    124   1.1    eeh options 	COMPAT_11	# NetBSD 1.1 binary compatibility
    125   1.1    eeh options 	COMPAT_12	# NetBSD 1.2 binary compatibility
    126   1.1    eeh options 	COMPAT_13	# NetBSD 1.3 binary compatibility
    127  1.11    eeh #options 	COMPAT_SPARC32	# NetBSD/sparc binary compatibility -- 64-bit only
    128   1.1    eeh options 	COMPAT_SUNOS	# SunOS 4.x binary compatibility
    129   1.1    eeh options 	COMPAT_SVR4	# SunOS 5.x binary compatibility
    130   1.1    eeh options 	EXEC_ELF32	# Exec module for SunOS 5.x binaries.
    131  1.11    eeh #options		EXEC_ELF64	# Exec module for sparc64 & SunOs 5.x binaries. -- 64-bit only
    132  1.10    eeh #options		SYSCALL_DEBUG
    133   1.1    eeh 
    134   1.1    eeh ## File systems.  You probably need at least one of FFS or NFS.
    135   1.1    eeh file-system	FFS		# Berkeley Fast Filesystem
    136   1.1    eeh file-system	NFS		# Sun NFS-compatible filesystem client
    137   1.1    eeh file-system	KERNFS		# kernel data-structure filesystem
    138   1.1    eeh file-system	NULLFS		# NULL layered filesystem
    139   1.1    eeh file-system	MFS		# memory-based filesystem
    140   1.1    eeh file-system	FDESC		# user file descriptor filesystem
    141   1.1    eeh file-system	UMAPFS		# uid/gid remapping filesystem
    142   1.1    eeh file-system	LFS		# Log-based filesystem (still experimental)
    143   1.1    eeh file-system	PORTAL		# portal filesystem (still experimental)
    144   1.1    eeh file-system	PROCFS		# /proc
    145   1.1    eeh file-system	CD9660		# ISO 9660 + Rock Ridge file system
    146   1.1    eeh file-system	UNION		# union file system
    147   1.1    eeh file-system	MSDOSFS		# MS-DOS FAT filesystem(s).
    148   1.1    eeh 
    149   1.1    eeh ## File system options.
    150   1.1    eeh options 	NFSSERVER	# Sun NFS-compatible filesystem server
    151   1.1    eeh options 	QUOTA		# FFS quotas
    152   1.1    eeh #options 	FFS_EI		# FFS Endian Independent support
    153   1.1    eeh 
    154   1.1    eeh ## Network protocol support.  In most environments, INET is required.
    155   1.1    eeh options 	INET		# IP (Internet Protocol) v4
    156   1.1    eeh options 	TCP_COMPAT_42	# 4.2BSD IP implementation compatibility
    157   1.1    eeh #options 	GATEWAY		# packet forwarding ("router switch")
    158   1.9    mrg options 	MROUTING	# packet forwarding of multicast packets
    159   1.1    eeh #options 	DIRECTED_BROADCAST	# allow broadcasts through routers
    160   1.1    eeh options 	NS		# Xerox NS networking
    161   1.1    eeh #options 	NSIP		# Xerox NS tunneling over IP
    162   1.1    eeh options 	ISO,TPIP	# OSI networking
    163   1.1    eeh options 	EON		# OSI tunneling over IP
    164   1.1    eeh #options 	CCITT,LLC,HDLC	# X.25 packet switched protocol
    165   1.1    eeh options 	NETATALK	# AppleTalk (over Ethernet) protocol
    166   1.9    mrg options 	NTP		# Network Time Protocol in-kernel support
    167   1.1    eeh #options 	PPS_SYNC	# Add serial line synchronization for NTP
    168   1.9    mrg options 	PFIL_HOOKS	# Add pfil(9) hooks, intended for custom LKMs.
    169   1.9    mrg options 	IPFILTER_LOG	# Add ipmon(8) logging for ipfilter device
    170   1.9    mrg options 	PPP_BSDCOMP	# Add BSD compression to ppp device
    171   1.9    mrg options 	PPP_DEFLATE	# Add deflate (libz) compression to ppp device
    172   1.9    mrg options 	PPP_FILTER	# Add active filters for ppp (via bpf)
    173   1.1    eeh 
    174   1.1    eeh 
    175   1.1    eeh #### Main bus and CPU .. all systems.
    176   1.1    eeh mainbus0 at root
    177   1.1    eeh cpu0	at mainbus0
    178   1.1    eeh 
    179   1.1    eeh #### Bus types found on SPARC systems.
    180   1.1    eeh 
    181  1.10    eeh sbus0	at mainbus0				# Ultra 1
    182   1.1    eeh #upa0	at mainbus0				# Ultra 1E, Ultra 2, Ex0000
    183   1.1    eeh #pci0	at mainbus0				# Darwin
    184  1.10    eeh #ebus*	at pci?					# ebus devices
    185   1.1    eeh 
    186   1.1    eeh #### Standard system devices -- all required for a given architecture
    187   1.1    eeh 
    188  1.10    eeh ## Auxiliary system registers -- We use the OBP for power management
    189   1.3    mrg #auxreg0 at sbus0
    190  1.10    eeh #auxreg0 at pci0
    191   1.1    eeh 
    192   1.1    eeh # We also need:
    193   1.1    eeh # bpp0 at sbus0					# parallel port
    194  1.10    eeh # ecpp0 at pci0					# parallel port ?
    195   1.1    eeh 
    196   1.9    mrg ## Mostek clock found on 4/300, sun4c, sun4m and sun4u systems.
    197   1.1    eeh ## The Mostek clock NVRAM is the "eeprom" on sun4/300 systems.
    198   1.3    mrg clock0	at sbus0 slot ? offset ?
    199  1.10    eeh #clock0	at pci0
    200   1.1    eeh 
    201   1.9    mrg ## Timer chip found on 4/300, sun4c, sun4m and sun4u systems.
    202   1.1    eeh timer0	at mainbus0				# sun4c
    203   1.1    eeh 
    204   1.1    eeh #### Serial port configuration
    205   1.1    eeh 
    206   1.1    eeh ## Zilog 8530 serial chips.  Each has two-channels.
    207   1.1    eeh ## zs0 is ttya and ttyb.  zs1 is the keyboard and mouse.
    208   1.3    mrg zs0	at sbus0 slot ? offset ?
    209   1.1    eeh zstty0	at zs0 channel 0	# ttya
    210   1.1    eeh zstty1	at zs0 channel 1	# ttyb
    211   1.1    eeh 
    212   1.3    mrg zs1	at sbus0 slot ? offset ?
    213   1.1    eeh kbd0	at zs1 channel 0	# keyboard
    214   1.1    eeh ms0	at zs1 channel 1	# mouse
    215   1.1    eeh 
    216  1.10    eeh ## PCI machines apparently have serial ports
    217  1.10    eeh ## called `se' and `su'
    218  1.10    eeh 
    219  1.10    eeh ## Part of a PC87332VLJ?
    220  1.10    eeh #se0	at ebus?		# 
    221  1.10    eeh #kbd0	at su1 channel 0	# keyboard
    222  1.10    eeh #ms0	at su1 channel 1	# mouse
    223  1.10    eeh 
    224  1.10    eeh ## These are two SAB82532 controllers
    225  1.10    eeh #su0	at ebus?		# ttya
    226  1.10    eeh #su1	at ebus?		# ttyb
    227  1.10    eeh 
    228   1.1    eeh #### Disk controllers and disks
    229   1.1    eeh 
    230   1.1    eeh ## The following flags may be set for the NCR53c94 based esp driver:
    231   1.1    eeh ##	bits 0-7:  disable disconnect/reselect for the corresponding target
    232   1.1    eeh ##	bits 8-15: disable synchronous negotiation for target [bit-8]
    233   1.1    eeh 
    234   1.9    mrg ## sun4/300, sun4c, sun4m and sun4u on-board SCSI, and FSBE/S SBus SCSI cards.
    235   1.1    eeh ## Both `dma' and `esp' are needed in all cases.
    236   1.1    eeh ## Two kinds of additional SBus SCSI interfaces are available.  One uses
    237   1.1    eeh ## "esp at sbus" like the sun4c on-board; the other uses "esp at dma".
    238   1.1    eeh 
    239   1.1    eeh ## sun4/300 SCSI - an NCR53c94 or equivalent behind
    240   1.1    eeh ## an LSI Logic DMA controller
    241   1.1    eeh 
    242   1.9    mrg dma0	at sbus0 slot ? offset ?			# sun4c/sun4m/sun4u
    243   1.9    mrg esp0	at dma0 flags 0x0000				# sun4m/sun4u
    244  1.10    eeh scsibus* at esp?
    245   1.1    eeh 
    246   1.1    eeh # FSBE/S SCSI
    247   1.1    eeh dma*	at sbus? slot ? offset ?			# SBus
    248   1.1    eeh esp*	at dma? flags 0x0000				# SBus
    249   1.1    eeh 
    250   1.1    eeh scsibus* at esp?
    251   1.1    eeh 
    252   1.1    eeh ## Qlogic ISP SBus SCSI Card
    253   1.5    mrg isp*	at sbus? slot ? offset ?
    254   1.5    mrg scsibus* at isp?
    255   1.1    eeh 
    256   1.9    mrg ## FAS support missing
    257   1.9    mrg #fas*	at sbus? slot ? offset ?
    258   1.9    mrg #scsibus* at fas?
    259   1.9    mrg 
    260  1.10    eeh ## GLM support is missing
    261  1.10    eeh #scsi*	at pci?						# 53C875 "glm" compatible
    262  1.10    eeh 
    263   1.1    eeh ## These entries find devices on all SCSI busses and assign
    264   1.1    eeh ## unit numbers dynamically.
    265   1.1    eeh sd*	at scsibus? target ? lun ?		# SCSI disks
    266   1.1    eeh st*	at scsibus? target ? lun ?		# SCSI tapes
    267   1.1    eeh cd*	at scsibus? target ? lun ?		# SCSI CD-ROMs
    268   1.1    eeh ch*	at scsibus? target ? lun ?		# SCSI changer devices
    269   1.1    eeh ss*	at scsibus? target ? lun ?		# SCSI scanners
    270   1.1    eeh uk*	at scsibus? target ? lun ?		# unknown SCSI
    271   1.1    eeh 
    272   1.1    eeh ## Floppy controller and drive found on SPARCstations.
    273   1.1    eeh 
    274   1.9    mrg # need share with the sparc...uses auxreg.  what is this on sparc64?
    275   1.3    mrg #fdc0	at sbus0 slot ? offset ?
    276  1.10    eeh #fdc0	at pci?					# Called fdthree?
    277   1.9    mrg #fd*	at fdc0 	 			# the drive itself
    278   1.1    eeh 
    279   1.1    eeh ## A disk-like interface to files.  Can be used to create floppy, CD,
    280   1.1    eeh ## miniroot images, etc.
    281   1.1    eeh 
    282   1.1    eeh pseudo-device	vnd	4
    283   1.1    eeh 
    284   1.1    eeh ## Concatenated and striped disks; with this, you can create a software-based
    285   1.1    eeh ## disk array similar to a "RAID 0" setup.  See ccd(4).
    286   1.1    eeh 
    287   1.1    eeh pseudo-device	ccd	4
    288   1.7  oster 
    289   1.7  oster ## RAIDframe disk driver: software RAID driver.  See raid(4).
    290   1.7  oster 
    291   1.9    mrg pseudo-device	raid	4
    292   1.1    eeh 
    293   1.1    eeh ## Memory disk device, used on boot floppies with compressed
    294   1.1    eeh ## kernel-plus-root-disk images.
    295   1.1    eeh 
    296   1.9    mrg pseudo-device	md	1
    297   1.1    eeh 
    298   1.1    eeh 
    299   1.1    eeh #### Network interfaces
    300   1.1    eeh 
    301   1.1    eeh ## LANCE Ethernet - an AMD 7990 LANCE behind specialized DMA glue
    302   1.1    eeh ## Three flavors of additional SBus ethernets are available.  One attaches
    303   1.1    eeh ## directly like the sun4c on-board, one uses the ledma device like the
    304   1.1    eeh ## sun4m on-board, and one uses the lebuffer device.
    305   1.1    eeh 
    306   1.1    eeh ledma0		at sbus0 slot ? offset ?		# sun4m on-board
    307   1.1    eeh le0		at ledma0				# sun4m on-board
    308   1.1    eeh le*		at sbus? slot ? offset ?		# SBus
    309   1.1    eeh ledma*		at sbus? slot ? offset ?		# SBus
    310   1.1    eeh le*		at ledma?				# SBus
    311   1.1    eeh lebuffer0	at sbus? slot ? offset ?		# SBus
    312   1.1    eeh le0		at lebuffer?				# SBus
    313   1.1    eeh lebuffer*	at sbus? slot ? offset ?		# SBus
    314   1.1    eeh le*		at lebuffer?				# SBus
    315   1.1    eeh 
    316  1.10    eeh ## HME not supported yet
    317  1.10    eeh #hme*		at sbus0 slot ? offset ?
    318  1.10    eeh #network*	at pci?					# "hme" compatible
    319  1.10    eeh 
    320   1.9    mrg ## qec/be, qec/hme
    321   1.9    mrg qec*		at sbus? slot ? offset ?
    322   1.9    mrg be*		at qec?
    323   1.9    mrg qe*		at qec?
    324   1.1    eeh 
    325   1.1    eeh ## Loopback network interface; required
    326   1.1    eeh pseudo-device	loop
    327   1.1    eeh 
    328   1.1    eeh ## SLIP and CSLIP interfaces, for IP over a serial line.
    329   1.1    eeh pseudo-device	sl		2
    330   1.1    eeh 
    331   1.1    eeh ## PPP, the successor to SLIP.  See pppd(8).
    332   1.1    eeh pseudo-device	ppp		2
    333   1.1    eeh 
    334   1.1    eeh ## Starmode Radio IP, a special hardware network device.
    335   1.9    mrg pseudo-device	strip		1
    336   1.1    eeh 
    337   1.1    eeh ## Network "tunnel" device, allowing protocol stacks to run in the userland.
    338   1.1    eeh ## This is used by the third-party user-mode "ppp" program, and others.
    339   1.1    eeh pseudo-device	tun		4
    340   1.8    hwr 
    341   1.8    hwr ## Generic L3 over IP tunnel
    342   1.8    hwr #pseudo-device	gre		2	# generic L3 over IP tunnel
    343   1.1    eeh 
    344   1.1    eeh ## Berkeley Packet Filter, required to run RARPD.  A generic C-language
    345   1.1    eeh ## interface that allows selective examining of incoming packets.
    346   1.1    eeh pseudo-device	bpfilter	8
    347   1.1    eeh 
    348   1.1    eeh ## IP Filter, used in firewall and NAT applications.  See ipnat(8) for
    349   1.1    eeh ## one example of the use of the IP Filter.
    350   1.1    eeh pseudo-device	ipfilter
    351   1.1    eeh 
    352   1.1    eeh 
    353   1.1    eeh #### Audio and video devices
    354   1.1    eeh 
    355   1.9    mrg ## /dev/audio support (`audiocs' plus `audio')
    356   1.1    eeh ##
    357   1.9    mrg audiocs0	at sbus0 slot ? offset ?		# SUNW,CS4231
    358   1.9    mrg audio*		at audiocs0
    359   1.1    eeh 
    360   1.1    eeh 
    361   1.1    eeh ## Sun "bwtwo" black and white framebuffer, found on sun4, sun4c, and sun4m
    362   1.1    eeh ## systems.  If your sun4 system has a cgfour installed in the P4 slot,
    363   1.1    eeh ## the P4 entries for "bwtwo" will attach to the overlay plane of the
    364   1.1    eeh ## "cgfour".
    365   1.1    eeh 
    366   1.3    mrg #bwtwo0		at sbus0 slot ? offset ?		# sun4c and sun4m
    367   1.3    mrg #bwtwo*		at sbus? slot ? offset ?		#
    368   1.1    eeh 
    369   1.1    eeh ## Sun "cgthree" Sbus color framebuffer
    370   1.3    mrg #cgthree0	at sbus? slot ? offset ?
    371   1.3    mrg #cgthree*	at sbus? slot ? offset ?
    372   1.1    eeh 
    373   1.1    eeh ## Sun "cgsix" accelerated color framebuffer.
    374   1.1    eeh cgsix0		at sbus? slot ? offset ?
    375   1.1    eeh cgsix*		at sbus? slot ? offset ?
    376   1.1    eeh 
    377   1.1    eeh ## Sun "tcx" accelerated color framebuffer.
    378   1.3    mrg #tcx0		at sbus? slot ? offset ?
    379   1.3    mrg #tcx*		at sbus? slot ? offset ?
    380   1.1    eeh 
    381   1.1    eeh # Sun "cgfourteen" accelerated 24-bit framebuffer.
    382   1.3    mrg #cgfourteen0	at obio0			# sun4m
    383   1.1    eeh 
    384  1.10    eeh ## Sun FFB not supported
    385  1.10    eeh #ffb*		at upa?
    386   1.1    eeh 
    387   1.1    eeh #### Other device configuration
    388   1.1    eeh 
    389   1.1    eeh ## Pseudo ttys, required for network logins and programs like screen.
    390   1.1    eeh ## 32 is a good number for average systems; you may have as many as you
    391   1.1    eeh ## like, though 256 is more or less the upper limit.  Increasing this
    392   1.1    eeh ## number still requires you to run /dev/MAKEDEV to create the files
    393   1.1    eeh ## for the ptys.
    394   1.1    eeh 
    395   1.9    mrg pseudo-device	pty		64	# pseudo-ttys (for network, etc.)
    396   1.1    eeh 
    397   1.1    eeh ## Random device, used to implement /dev/random (a source of random noise),
    398   1.1    eeh ## and generate randomness for some kernel formulae.
    399   1.1    eeh ## THIS DEVICE IS EXPERIMENTAL; use at your own risk.
    400   1.1    eeh 
    401   1.9    mrg pseudo-device	rnd
    402