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INSTALL revision 1.7
      1 #	$NetBSD: INSTALL,v 1.7 1999/05/19 21:06:00 ad Exp $
      2 #
      3 # from: NetBSD: GENERIC,v 1.67 1998/05/20 11:50:54 pk Exp
      4 #
      5 # floppy install kernel.  try to keep this in sync with GENERIC but
      6 # leave as much disabled as possible.
      7 
      8 include "arch/sparc/conf/std.sparc"
      9 
     10 maxusers	32
     11 
     12 # Enable the hooks used for initializing the root memory-disk.
     13 options 	MEMORY_DISK_HOOKS
     14 options 	MEMORY_DISK_IS_ROOT	# force root on memory disk
     15 options 	MEMORY_DISK_SERVER=0	# no userspace memory disk support
     16 #options 	MINIROOTSIZE=3074	# size of memory disk, in blocks
     17 options 	MINIROOTSIZE=3312	# 1.44M * 1.15.  this must match
     18 					# what is `instfs' in /etc/disktab.
     19 
     20 pseudo-device	md		1	# memory disk device (ramdisk)
     21 
     22 ## System kernel configuration.  See options(4) for more detail.
     23 
     24 # Options for variants of the Sun SPARC architecure.
     25 # We currently support three architecture types; at least one is required.
     26 #options 	SUN4		# sun4/100, sun4/200, sun4/300
     27 options 	SUN4C		# sun4c - SS1, 1+, 2, ELC, SLC, IPC, IPX, etc.
     28 options 	SUN4M		# sun4m - SS10, SS20, Classic, etc.
     29 
     30 #options 	SUN4_MMU3L	# 3-level MMU on sun4/400; (incomplete)
     31 
     32 ## System options specific to the sparc machine type
     33 
     34 # Blink the power LED on some machines to indicate the system load.
     35 #options 	BLINK
     36 
     37 ## Use a faster console than the PROM's slow drawing routines.  Not needed
     38 ## for headless (no framebuffer) machines.
     39 #options 	RASTERCONSOLE		# fast rasterop console
     40 #options 	FONT_GALLANT12x22	# the console font
     41 #options 	FONT_BOLD8x16		# a somewhat smaller font
     42 #options	RASTERCONSOLE_FGCOL=WSCOL_BLACK
     43 #options	RASTERCONSOLE_BGCOL=WSCOL_WHITE
     44 
     45 #### System options that are the same for all ports
     46 
     47 ## Root device configuration: change the ?'s if you are going to use a
     48 ## nonstandard root partition (other than where the kernel is booted from)
     49 ## and/or nonstandard root type (not ffs or nfs).  Normally this can be
     50 ## automagically determined at boot time.
     51 
     52 config		netbsd	root on ? type ?
     53 
     54 ## System call tracing (see ktrace(1)).
     55 #options 	KTRACE
     56 
     57 ## Collect statistics on kernel malloc's and free's.  This does have a
     58 ## significant performance hit on slower machines, so it is intended for
     59 ## diagnostic use only.
     60 options 	KMEMSTATS
     61 
     62 ## System V compatible IPC subsystem.  (msgctl(2), semctl(2), and shmctl(2))
     63 #options 	SYSVMSG		# System V message queues
     64 #options 	SYSVSEM		# System V semaphores
     65 #options 	SYSVSHM		# System V shared memory
     66 #options 	SHMMAXPGS=1024	# 1024 pages is the default
     67 
     68 ## Loadable kernel module support; still under development.
     69 #options 	LKM
     70 
     71 ## NFS boot options; default on sparc is the bootparam protocol
     72 options 	NFS_BOOT_BOOTPARAM
     73 #options 	NFS_BOOT_BOOTP
     74 #options 	NFS_BOOT_DHCP
     75 
     76 #### Debugging options
     77 
     78 ## The DDB in-kernel debugger runs at panic (unless DDB_ONPANIC=0), or at
     79 ## serial console break or keyboard reset, where the PROM would normally
     80 ## intercept.  DDB_HISTORY_SIZE adds up/down arrow command history.
     81 options 	DDB			# kernel dynamic debugger
     82 #options 	DDB_HISTORY_SIZE=100	# enable history editing in DDB
     83 #options 	DDB_ONPANIC		# see also sysctl(8): `ddb.onpanic'
     84 
     85 ## You may also use gdb, on another computer connected to this machine over
     86 ## a serial port.  Both KGDBDEV and KGDBRATE should be specified; KGDBDEV is
     87 ## a dev_t encoded device number of the serial port to use.
     88 ## (0xc01 = ttya, 0xc02 = ttyb.)
     89 #options 	KGDB		# support for kernel gdb
     90 #options 	KGDBDEV=0xc01	# kgdb device number (this sample is `ttyb')
     91 #options 	KGDBRATE=38400	# baud rate
     92 
     93 
     94 ## Compile the kernel with debugging symbols (`netbsd.gdb' is the debug file),
     95 ## such that gdb(1) can be used on a kernel coredump.
     96 
     97 #makeoptions 	DEBUG="-g"
     98 
     99 
    100 ## Adds code to the kernel that does internal consistency checks, and will
    101 ## cause the kernel to panic if corruption of internal data structures
    102 ## is detected.
    103 #options 	DIAGNOSTIC	# extra kernel sanity checking
    104 
    105 ## Enable (possibly expensive) debugging code that may also display messages
    106 ## on the system console
    107 #options 	DEBUG
    108 
    109 ## Make SCSI error messages more verbose when explaining their meanings.
    110 #options 	SCSIVERBOSE
    111 
    112 ## `INSECURE' turns off the kernel security level (securelevel = 0 always).
    113 ## This allows writing to /dev/mem, loading kernel modules while multi-user,
    114 ## and other insecurities good only for development work.  Do not use this
    115 ## option on a production machine.
    116 options 	INSECURE
    117 
    118 ## Allow non-root users to grab /dev/console with programs such as xconsole.
    119 ## `xconsole' therefore does not need setuid root with this option enabled.
    120 #options 	UCONSOLE
    121 
    122 ## `FDSCRIPTS' allows non-readable but executable scripts by providing a
    123 ## pre-opened opaque file to the script interpreter.  `SETUIDSCRIPTS',
    124 ## which implies FDSCRIPTS, allows scripts to be set-user-id using the same
    125 ## opaque file mechanism.  Perl calls this "secure setuid scripts."
    126 
    127 #options 	FDSCRIPTS
    128 #options 	SETUIDSCRIPTS
    129 
    130 ## Options for compatibility with previous releases foreign system binaries.
    131 ## In the cases of COMPAT_SUNOS and COMPAT_SVR4, you may need to set up
    132 ## additional user-level utilities or system configuration files. See
    133 ## compat_sunos(8) and compat_svr4(8).
    134 
    135 #options 	COMPAT_43	# 4.3BSD system interfaces
    136 #options 	COMPAT_10	# NetBSD 1.0 binary compatibility
    137 #options 	COMPAT_11	# NetBSD 1.1 binary compatibility
    138 #options 	COMPAT_12	# NetBSD 1.2 binary compatibility
    139 options 	COMPAT_13	# NetBSD 1.3 binary compatibility
    140 #options 	COMPAT_SUNOS	# SunOS 4.x binary compatibility
    141 #options 	COMPAT_SVR4	# SunOS 5.x binary compatibility
    142 #options 	EXEC_ELF32	# Exec module for SunOS 5.x binaries.
    143 
    144 ## File systems.  You probably need at least one of FFS or NFS.
    145 file-system	FFS		# Berkeley Fast Filesystem
    146 file-system	NFS		# Sun NFS-compatible filesystem client
    147 file-system	KERNFS		# kernel data-structure filesystem
    148 #file-system	NULLFS		# NULL layered filesystem
    149 file-system	MFS		# memory-based filesystem
    150 #file-system	FDESC		# user file descriptor filesystem
    151 #file-system	UMAPFS		# uid/gid remapping filesystem
    152 #file-system	LFS		# Log-based filesystem (still experimental)
    153 #file-system	PORTAL		# portal filesystem (still experimental)
    154 #file-system	PROCFS		# /proc
    155 file-system	CD9660		# ISO 9660 + Rock Ridge file system
    156 #file-system	UNION		# union file system
    157 #file-system	MSDOSFS		# MS-DOS FAT filesystem(s).
    158 
    159 ## File system options.
    160 #options 	NFSSERVER	# Sun NFS-compatible filesystem server
    161 #options 	QUOTA		# FFS quotas
    162 #options 	FFS_EI		# FFS Endian Independent support
    163 
    164 ## Network protocol support.  In most environments, INET is required.
    165 options 	INET		# IP (Internet Protocol) v4
    166 options 	TCP_COMPAT_42	# 4.2BSD IP implementation compatibility
    167 #options 	GATEWAY		# packet forwarding ("router switch")
    168 #options 	MROUTING	# packet forwarding of multicast packets
    169 #options 	DIRECTED_BROADCAST	# allow broadcasts through routers
    170 #options 	NS		# Xerox NS networking
    171 #options 	NSIP		# Xerox NS tunneling over IP
    172 #options 	ISO,TPIP	# OSI networking
    173 #options 	EON		# OSI tunneling over IP
    174 #options 	CCITT,LLC,HDLC	# X.25 packet switched protocol
    175 #options 	NETATALK	# AppleTalk (over Ethernet) protocol
    176 #options 	NTP		# Network Time Protocol in-kernel support
    177 #options 	PPS_SYNC	# Add serial line synchronization for NTP
    178 #options 	PFIL_HOOKS	# Add pfil(9) hooks, intended for custom LKMs.
    179 #options 	IPFILTER_LOG	# Add ipmon(8) logging for ipfilter device
    180 #options 	PPP_BSDCOMP	# Add BSD compression to ppp device
    181 #options 	PPP_DEFLATE	# Add deflate (libz) compression to ppp device
    182 #options 	PPP_FILTER	# Add active filters for ppp (via bpf)
    183 
    184 
    185 
    186 #### Main bus and CPU .. all systems.
    187 mainbus0 at root
    188 cpu0	at mainbus0
    189 
    190 #### Bus types found on SPARC systems.
    191 
    192 sbus0	at mainbus0				# sun4c
    193 obio0	at mainbus0				# sun4 and sun4m
    194 #vme0	at mainbus0				# sun4
    195 iommu0	at mainbus0				# sun4m
    196 sbus0	at iommu0				# sun4m
    197 vme0	at iommu0				# sun4m
    198 
    199 ## SBus expander box
    200 #xbox*	at sbus? slot ? offset ?
    201 #sbus*	at xbox?
    202 
    203 #### Standard system devices -- all required for a given architecture
    204 
    205 ## Auxiliary system registers on sun4c and sun4m
    206 auxreg0	at mainbus0				# sun4c
    207 auxreg0	at obio0				# sun4m
    208 
    209 ## Power status and control register on Sun4m systems
    210 power0	at obio0
    211 
    212 ## Mostek clock found on 4/300, sun4c, and sun4m systems.
    213 ## The Mostek clock NVRAM is the "eeprom" on sun4/300 systems.
    214 clock0	at mainbus0				# sun4c
    215 clock0	at obio0				# sun4m
    216 #clock0	at obio0 addr 0xf2000000		# sun4/300
    217 
    218 ## Intersil clock found on 4/100 and 4/200 systems.
    219 #oclock0	at obio0 addr 0xf3000000		# sun4/200
    220 #oclock0	at obio0 addr 0x03000000		# sun4/100
    221 
    222 ## Memory error registers.
    223 memreg0	at mainbus0				# sun4c
    224 memreg0	at obio0				# sun4m
    225 #memreg0	at obio0 addr 0xf4000000		# sun4/200 and sun4/300
    226 #memreg0	at obio0 addr 0x04000000		# sun4/100
    227 
    228 ## Timer chip found on 4/300, sun4c, and sun4m systems.
    229 timer0	at mainbus0				# sun4c
    230 timer0	at obio0				# sun4m
    231 #timer0	at obio0 addr 0xef000000		# sun4/300
    232 
    233 ## EEPROM found on 4/100 and 4/200 systems.  Note that the 4/300
    234 ## doesn't use this driver; the `EEPROM' is in the NVRAM on the
    235 ## Mostek clock chip on 4/300 systems.
    236 #eeprom0	at obio0 addr 0xf2000000		# sun4/200
    237 #eeprom0	at obio0 addr 0x02000000		# sun4/100
    238 
    239 
    240 #### Serial port configuration
    241 
    242 ## Zilog 8530 serial chips.  Each has two-channels.
    243 ## zs0 is ttya and ttyb.  zs1 is the keyboard and mouse.
    244 zs0	at mainbus0					# sun4c
    245 zs0	at obio0					# sun4m
    246 #zs0	at obio0 addr 0xf1000000 level 12 flags 0x103	# sun4/200 and sun4/300
    247 #zs0	at obio0 addr 0x01000000 level 12 flags 0x103	# sun4/100
    248 zstty0	at zs0 channel 0	# ttya
    249 zstty1	at zs0 channel 1	# ttyb
    250 
    251 zs1	at mainbus0					# sun4c
    252 zs1	at obio0					# sun4m
    253 #zs1	at obio0 addr 0xf0000000 level 12 flags 0x103	# sun4/200 and sun4/300
    254 #zs1	at obio0 addr 0x00000000 level 12 flags 0x103	# sun4/100
    255 kbd0	at zs1 channel 0	# keyboard
    256 ms0	at zs1 channel 1	# mouse
    257 
    258 #zs2	at obio0 addr 0xe0000000 level 12 flags 0x103	# sun4/300
    259 #zstty2	at zs2 channel 0	# ttyc
    260 #zstty3	at zs2 channel 1	# ttyd
    261 
    262 
    263 ## Magma Serial/Parallel driver
    264 #magma*	at sbus? slot ? offset ?
    265 #mtty*	at magma?
    266 #mbpp*	at magma?
    267 
    268 
    269 #### Disk controllers and disks
    270 
    271 #
    272 
    273 ## The following flags may be set for the NCR53c94 based esp driver:
    274 ##	bits 0-7:  disable disconnect/reselect for the corresponding target
    275 ##	bits 8-15: disable synchronous negotiation for target [bit-8]
    276 
    277 ## sun4/300, sun4c, sun4m on-board SCSI, and FSBE/S SBus SCSI cards.
    278 ## Both `dma' and `esp' are needed in all cases.
    279 ## Two kinds of additional SBus SCSI interfaces are available.  One uses
    280 ## "esp at sbus" like the sun4c on-board; the other uses "esp at dma".
    281 
    282 ## sun4/300 SCSI - an NCR53c94 or equivalent behind
    283 ## an LSI Logic DMA controller
    284 
    285 #dma0	at obio0 addr 0xfa001000 level 4		# sun4/300
    286 #esp0	at obio0 addr 0xfa000000 level 4 flags 0x0000	# sun4/300
    287 
    288 dma0	at sbus0 slot ? offset ?			# sun4c/sun4m
    289 esp0	at sbus0 slot ? offset ? flags 0x0000		# sun4c
    290 esp0	at dma0 flags 0x0000				# sun4m
    291 
    292 # FSBE/S SCSI
    293 dma*	at sbus? slot ? offset ?			# SBus
    294 esp*	at sbus? slot ? offset ? flags 0x0000		# SBus (older proms)
    295 esp*	at dma? flags 0x0000				# SBus
    296 
    297 scsibus* at esp?
    298 
    299 ## Qlogic ISP SBus SCSI Card
    300 isp*	at sbus? slot ? offset ?
    301 scsibus* at isp?
    302 
    303 ## NCR5380-based "Sun SCSI 3" VME SCSI controller.
    304 ## This driver has several flags which may be enabled by OR'ing
    305 ## the values and using the "flags" directive.
    306 ## Valid flags are:
    307 ##
    308 ##	0x01		Use DMA (may be polled)
    309 ##	0x02		Use DMA completion interrupts
    310 ##	0x04		Allow disconnect/reselect
    311 ##
    312 ## E.g. the following would enable DMA, interrupts, and reselect:
    313 ## si0	at vme0 addr 0x200000 level 3 vect 0x40 flags 0x07
    314 ##
    315 ## By default, DMA is enabled in the driver.
    316 
    317 #si0	at vme0 addr 0x200000 pri 2 vec 0x40
    318 #scsibus* at si?
    319 
    320 ## NCR5380-based "SCSI Weird" on-board SCSI interface found
    321 ## on sun4/100 systems.  The flags are the same as the "si"
    322 ## controller.  Note, while DMA is enabled by default, only
    323 ## polled DMA works at this time, and reselects do not work
    324 ## on this particular controller.
    325 
    326 #sw0	at obio0 addr 0x0a000000 level 3
    327 #scsibus* at sw?
    328 
    329 ## These entries find devices on all SCSI busses and assign
    330 ## unit numbers dynamically.
    331 sd*	at scsibus? target ? lun ?		# SCSI disks
    332 st*	at scsibus? target ? lun ?		# SCSI tapes
    333 cd*	at scsibus? target ? lun ?		# SCSI CD-ROMs
    334 ch*	at scsibus? target ? lun ?		# SCSI changer devices
    335 #ss*	at scsibus? target ? lun ?		# SCSI scanners
    336 #uk*	at scsibus? target ? lun ?		# unknown SCSI
    337 
    338 
    339 ## Xylogics 753 or 7053 VME SMD disk controllers and disks, found
    340 ## on sun4 systems.
    341 #xdc0	at vme0 addr 0xee80 pri 3 vec 0x44
    342 #xdc1	at vme0 addr 0xee90 pri 3 vec 0x45
    343 #xdc2	at vme0 addr 0xeea0 pri 3 vec 0x46
    344 #xdc3	at vme0 addr 0xeeb0 pri 3 vec 0x47
    345 #xd*	at xdc? drive ?
    346 
    347 ## Xylogics 451 or 451 VME SMD disk controllers and disks, found
    348 ## on sun4 systems.
    349 #xyc0	at vme0 addr 0xee40 pri 3 vec 0x48
    350 #xyc1	at vme0 addr 0xee48 pri 3 vec 0x49
    351 #xy*	at xyc? drive ?
    352 
    353 
    354 ## Floppy controller and drive found on SPARCstations.
    355 
    356 fdc0	at mainbus0				# sun4c controller
    357 fdc0	at obio0				# sun4m controller
    358 fd*	at fdc0					# the drive itself
    359 
    360 ## A disk-like interface to files.  Can be used to create floppy, CD,
    361 ## miniroot images, etc.
    362 
    363 #pseudo-device	vnd	4
    364 
    365 ## Concatenated and striped disks; with this, you can create a software-based
    366 ## disk array similar to a "RAID 0" setup.  See ccd(4).
    367 
    368 #pseudo-device	ccd	4
    369 
    370 ## Memory disk device, used on boot floppies with compressed
    371 ## kernel-plus-root-disk images.
    372 
    373 #pseudo-device	md	1
    374 
    375 
    376 #### Network interfaces
    377 
    378 ## LANCE Ethernet - an AMD 7990 LANCE behind specialized DMA glue
    379 ## Three flavors of additional SBus ethernets are available.  One attaches
    380 ## directly like the sun4c on-board, one uses the ledma device like the
    381 ## sun4m on-board, and one uses the lebuffer device.
    382 
    383 #le0		at obio0 addr 0xf9000000 level 6	# sun4/300
    384 le0		at sbus0 slot ? offset ?		# sun4c on-board
    385 ledma0		at sbus0 slot ? offset ?		# sun4m on-board
    386 le0		at ledma0				# sun4m on-board
    387 le*		at sbus? slot ? offset ?		# SBus
    388 ledma*		at sbus? slot ? offset ?		# SBus
    389 le*		at ledma?				# SBus
    390 lebuffer0	at sbus? slot ? offset ?		# SBus
    391 le0		at lebuffer?				# SBus
    392 lebuffer*	at sbus? slot ? offset ?		# SBus
    393 le*		at lebuffer?				# SBus
    394 
    395 
    396 ## sun4/100 and sun4/200 Ethernet - an Intel 82586 on-board
    397 ## or on a Multibus/VME card.
    398 #ie0	at obio0 addr 0xf6000000 level 6		# sun4/200 on-board
    399 #ie0	at obio0 addr 0x06000000 level 6		# sun4/100 on-board
    400 #ie1	at vme0 addr 0xe88000 pri 3 vec 0x75		# VME
    401 #ie2	at vme0 addr 0x31ff02 pri 3 vec 0x76		# VME
    402 #ie3	at vme0 addr 0x35ff02 pri 3 vec 0x77		# VME
    403 #ie4	at vme0 addr 0x2dff02 pri 3 vec 0x7c		# VME
    404 
    405 ## Loopback network interface; required
    406 pseudo-device	loop
    407 
    408 ## SLIP and CSLIP interfaces, for IP over a serial line.
    409 pseudo-device	sl		2
    410 
    411 ## PPP, the successor to SLIP.  See pppd(8).
    412 #pseudo-device	ppp		2
    413 
    414 ## Starmode Radio IP, a special hardware network device.
    415 #pseudo-device	strip		1
    416 
    417 ## Network "tunnel" device, allowing protocol stacks to run in the userland.
    418 ## This is used by the third-party user-mode "ppp" program, and others.
    419 #pseudo-device	tun		4
    420 
    421 ## Berkeley Packet Filter, required to run RARPD.  A generic C-language
    422 ## interface that allows selective examining of incoming packets.
    423 #pseudo-device	bpfilter	8
    424 
    425 ## IP Filter, used in firewall and NAT applications.  See ipnat(8) for
    426 ## one example of the use of the IP Filter.
    427 #pseudo-device	ipfilter
    428 
    429 
    430 #### Audio and video devices
    431 
    432 ## /dev/audio support (`audioamd' plus `audio')
    433 ##
    434 #audioamd0	at mainbus0				# sun4c
    435 #audioamd0	at obio0				# sun4m
    436 #audioamd0	at sbus0 slot ? offset ?		# sun4m
    437 #audio*		at audioamd0
    438 
    439 
    440 ## Sun "bwtwo" black and white framebuffer, found on sun4, sun4c, and sun4m
    441 ## systems.  If your sun4 system has a cgfour installed in the P4 slot,
    442 ## the P4 entries for "bwtwo" will attach to the overlay plane of the
    443 ## "cgfour".
    444 
    445 bwtwo0		at sbus0 slot ? offset ?		# sun4c and sun4m
    446 bwtwo*		at sbus? slot ? offset ?		#
    447 #bwtwo0		at obio0 addr 0xfd000000 level 4	# sun4/200
    448 #bwtwo0		at obio0 addr 0xfb300000 level 4	# sun4/300 in P4 slot
    449 #bwtwo0		at obio0 addr 0x0b300000 level 4	# sun4/100 in P4 slot
    450 
    451 ## Sun "cgtwo" VME color framebuffer
    452 #cgtwo0		at vme0 addr 0x400000 pri ? vec 0xa8
    453 
    454 ## Sun "cgthree" Sbus color framebuffer
    455 cgthree0	at sbus? slot ? offset ?
    456 cgthree*	at sbus? slot ? offset ?
    457 #cgthree0	at obio? slot ? offset ?		# sun4m
    458 
    459 ## Sun "cgfour" color framebuffer with overlay plane.  See above comment
    460 ## regarding overlay plane.
    461 #cgfour0		at obio0 addr 0xfb300000 level 4	# sun4/300 P4
    462 #cgfour0		at obio0 addr 0x0b300000 level 4	# sun4/100 P4
    463 
    464 ## Sun "cgsix" accelerated color framebuffer.
    465 cgsix0		at sbus? slot ? offset ?
    466 cgsix*		at sbus? slot ? offset ?
    467 #cgsix0		at obio0 addr 0xfb000000 level 4	# sun4/300 P4
    468 #cgsix0		at obio0 addr 0x0b000000 level 4	# sun4/100 P4
    469 
    470 ## Sun "cgeight" 24-bit framebuffer
    471 #cgeight0 	at obio0 addr 0xfb300000 level 4	# sun4/300 P4
    472 #cgeight0	at obio0 addr 0x0b300000 level 4	# sun4/100 P4
    473 
    474 ## Sun "tcx" accelerated color framebuffer.
    475 tcx0		at sbus? slot ? offset ?
    476 tcx*		at sbus? slot ? offset ?
    477 
    478 # Sun "cgfourteen" accelerated 24-bit framebuffer.
    479 cgfourteen0	at obio0			# sun4m
    480 
    481 
    482 #### Other device configuration
    483 
    484 ## Pseudo ttys, required for network logins and programs like screen.
    485 ## 32 is a good number for average systems; you may have as many as you
    486 ## like, though 256 is more or less the upper limit.  Increasing this
    487 ## number still requires you to run /dev/MAKEDEV to create the files
    488 ## for the ptys.
    489 
    490 pseudo-device	pty		32	# pseudo-ttys (for network, etc.)
    491 
    492 ## Random device, used to implement /dev/random (a source of random noise),
    493 ## and generate randomness for some kernel formulae.
    494 ## THIS DEVICE IS EXPERIMENTAL; use at your own risk.
    495 
    496 #pseudo-device	rnd
    497