GENERIC_TINY revision 1.40.4.2 1 # $NetBSD: GENERIC_TINY,v 1.40.4.2 2002/10/24 09:34:25 lukem Exp $
2 #
3 # GENERIC_TINY -- suitable default for 4M machines
4 # No EISA, PCI, or SCSI.
5 #
6
7 include "arch/i386/conf/std.i386"
8
9 #options INCLUDE_CONFIG_FILE # embed config file in kernel binary
10
11 makeoptions COPTS="-Os"
12
13 maxusers 8 # estimated number of users
14
15 # CPU support. At least one is REQUIRED.
16 options I386_CPU
17 options I486_CPU
18 options I586_CPU
19 options I686_CPU
20
21 # CPU-related options.
22 options MATH_EMULATE # floating point emulation
23 #options VM86 # virtual 8086 emulation
24 #options USER_LDT # user-settable LDT; used by WINE
25 # eliminate delay no-ops in I/O; recommended on all but very old machines
26 #options DUMMY_NOPS
27
28 # Misc. i386-specific options
29 #options XSERVER # X server support in console drivers
30
31 # This option allows you to force a serial console at the specified
32 # I/O address. see console(4) for details.
33 #options CONSDEVNAME="\"com\""
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
43 # Standard system options
44
45 #options UCONSOLE # users can use TIOCCONS (for xconsole)
46 options INSECURE # disable kernel security levels
47
48 options RTC_OFFSET=0 # hardware clock is this many mins. west of GMT
49 #options NTP # NTP phase/frequency locked loop
50
51 #options KTRACE # system call tracing via ktrace(1)
52
53 #options SYSVMSG # System V-like message queues
54 #options SYSVSEM # System V-like semaphores
55 #options SYSVSHM # System V-like memory sharing
56 #options SHMMAXPGS=1024 # 1024 pages is the default
57
58 options NMBCLUSTERS=256
59
60 #options LKM # loadable kernel modules
61
62 #options USERCONF # userconf(4) support
63 options PIPE_SOCKETPAIR # smaller, but slower pipe(2)
64
65 # Diagnostic/debugging support options
66 #options DIAGNOSTIC # expensive kernel consistency checks
67 #options DEBUG # expensive debugging checks/support
68 #options KMEMSTATS # kernel memory statistics (vmstat -m)
69 #options DDB # in-kernel debugger
70 #options DDB_HISTORY_SIZE=512 # enable history editing in DDB
71 #options KGDB # remote debugger
72 #options KGDB_DEVNAME="\"com\"",KGDB_DEVADDR=0x3f8,KGDB_DEVRATE=9600
73 #makeoptions DEBUG="-g" # compile full symbol table
74
75 # Compatibility options
76 #options COMPAT_NOMID # compatibility with 386BSD, BSDI, NetBSD 0.8,
77 #options COMPAT_09 # NetBSD 0.9,
78 #options COMPAT_10 # NetBSD 1.0,
79 #options COMPAT_11 # NetBSD 1.1,
80 options COMPAT_12 # NetBSD 1.2,
81 options COMPAT_13 # NetBSD 1.3,
82 options COMPAT_14 # NetBSD 1.4,
83 #options COMPAT_43 # and 4.3BSD
84 options COMPAT_386BSD_MBRPART # recognize old partition ID
85 #options TCP_COMPAT_42 # 4.2BSD TCP/IP bug compat. Not recommended.
86
87 #options COMPAT_SVR4 # binary compatibility with SVR4
88 #options COMPAT_IBCS2 # binary compatibility with SCO and ISC
89 #options COMPAT_LINUX # binary compatibility with Linux
90 #options COMPAT_FREEBSD # binary compatibility with FreeBSD
91
92 # File systems
93 file-system FFS # UFS
94 #file-system EXT2FS # second extended file system (linux)
95 #file-system LFS # log-structured file system
96 #file-system MFS # memory file system
97 file-system NFS # Network File System client
98 file-system CD9660 # ISO 9660 + Rock Ridge file system
99 file-system MSDOSFS # MS-DOS file system
100 #file-system FDESC # /dev/fd
101 file-system KERNFS # /kern
102 #file-system NULLFS # loopback file system
103 #file-system PORTAL # portal filesystem (still experimental)
104 #file-system PROCFS # /proc
105 #file-system UMAPFS # NULLFS + uid and gid remapping
106 #file-system UNION # union file system
107
108 # File system options
109 #options QUOTA # UFS quotas
110 #options FFS_EI # FFS Endian Independant support
111 #options NFSSERVER # Network File System server
112 #options EXT2FS_SYSTEM_FLAGS # makes ext2fs file flags (append and
113 # immutable) behave as system flags.
114 options VNODE_OP_NOINLINE # don't inline vnode op calls
115
116 # Networking options
117 #options GATEWAY # packet forwarding
118 options INET # IP + ICMP + TCP + UDP
119 #options MROUTING # IP multicast routing
120 #options NS # XNS
121 #options NSIP # XNS tunneling over IP
122 #options ISO,TPIP # OSI
123 #options EON # OSI tunneling over IP
124 #options CCITT,LLC,HDLC # X.25
125 #options NETATALK # AppleTalk networking protocols
126 #options PPP_BSDCOMP # BSD-Compress compression support for PPP
127 #options PPP_DEFLATE # Deflate compression support for PPP
128 #options PPP_FILTER # Active filter support for PPP (requires bpf)
129 #options PFIL_HOOKS # pfil(9) packet filter hooks
130 #options IPFILTER_LOG # ipmon(8) log support
131 #options IPFILTER_DEFAULT_BLOCK # block all packets by default
132 #options TCP_DEBUG # Record last TCP_NDEBUG packets with SO_DEBUG
133
134 # These options enable verbose messages for several subsystems.
135 # Warning, these may compile large string tables into the kernel!
136 #options EISAVERBOSE # verbose EISA device autoconfig messages
137 #options PCIVERBOSE # verbose PCI device autoconfig messages
138 #options PCI_CONFIG_DUMP # verbosely dump PCI config space
139 #options PCMCIAVERBOSE # verbose PCMCIA configuration messages
140 #options SCSIVERBOSE # human readable SCSI error messages
141 #options USBVERBOSE # verbose USB device autoconfig messages
142
143 #options NFS_BOOT_BOOTP,NFS_BOOT_BOOTPARAM
144
145 # Kernel root file system and dump configuration.
146 config 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
155 options WSEMUL_VT100 # VT100 / VT220 emulation
156 # different kernel output - see dev/wscons/wsdisplayvar.h
157 options WS_KERNEL_FG=WSCOL_GREEN
158 #options WS_KERNEL_BG=WSCOL_BLACK
159 # compatibility to other console drivers
160 options WSDISPLAY_COMPAT_PCVT # emulate some ioctls
161 options WSDISPLAY_COMPAT_SYSCONS # emulate some ioctls
162 options WSDISPLAY_COMPAT_USL # VT handling
163 options WSDISPLAY_COMPAT_RAWKBD # can get raw scancodes
164 # see dev/pckbc/wskbdmap_mfii.c for implemented layouts
165 #options PCKBD_LAYOUT="(KB_DE | KB_NODEAD)"
166 # allocate a number of virtual screens at autoconfiguration time
167 #options WSDISPLAY_DEFAULTSCREENS=4
168 # use a large software cursor that doesn't blink
169 options PCDISPLAY_SOFTCURSOR
170
171 #
172 # Device configuration
173 #
174
175 mainbus0 at root
176
177 #apm0 at mainbus0 # Advanced power management
178
179
180 # Basic Bus Support
181
182 # PCI bus support
183 #pci* at mainbus? bus ?
184 #pci* at pchb? bus ?
185 #pci* at ppb? bus ?
186
187 # PCI bridges
188 #pchb* at pci? dev ? function ? # PCI-Host bridges
189 #pceb* at pci? dev ? function ? # PCI-EISA bridges
190 #pcib* at pci? dev ? function ? # PCI-ISA bridges
191 #ppb* at pci? dev ? function ? # PCI-PCI bridges
192 # XXX 'puc's aren't really bridges, but there's no better place for them here
193 #puc* at pci? dev ? function ? # PCI "universal" comm. cards
194
195 # EISA bus support
196 #eisa0 at mainbus?
197 #eisa0 at pceb?
198
199 # ISA bus support
200 isa0 at mainbus?
201 #isa0 at pceb?
202 #isa0 at pcib?
203
204 # PCMCIA bus support
205 pcmcia* at pcic? controller ? socket ?
206
207 # ISA PCMCIA controllers
208 pcic0 at isa? port 0x3e0 iomem 0xd0000 iosiz 0x4000
209 pcic1 at isa? port 0x3e2 iomem 0xd4000 iosiz 0x4000
210
211 # ISA Plug-and-Play bus support
212 #isapnp0 at isa?
213
214 # ISA Plug-and-Play PCMCIA controllers
215 #pcic* at isapnp?
216
217 # Coprocessor Support
218
219 # Math Coprocessor support
220 npx0 at isa? port 0xf0 irq 13 # x86 math coprocessor
221
222 # Console Devices
223
224 # ISA console
225 #pc0 at isa? port 0x60 irq 1 # pccons generic PC console driver
226
227 # wscons
228 pckbc0 at isa? # pc keyboard controller
229 pckbd* at pckbc? # PC keyboard
230 #pms* at pckbc? # PS/2 mouse for wsmouse
231 vga0 at isa?
232 #vga* at pci? dev ? function ?
233 pcdisplay0 at isa? # CGA, MDA, EGA, HGA
234 wsdisplay* at vga? console ?
235 wsdisplay* at pcdisplay? console ?
236 wskbd* at pckbd? console ?
237 #wsmouse* at pms? mux 0
238
239
240 #pcppi0 at isa?
241 #sysbeep0 at pcppi?
242
243 # Serial Devices
244
245 # PCI serial interfaces
246 #com* at puc? port ? # 16x50s on "universal" comm boards
247 #cy* at pci? dev ? function ? # Cyclades Cyclom-Y serial boards
248
249 # ISA Plug-and-Play serial interfaces
250 #com* at isapnp? # Modems and serial boards
251
252 # PCMCIA serial interfaces
253 com* at pcmcia? function ? # Modems and serial cards
254
255 # ISA serial interfaces
256 #options COM_HAYESP # adds Hayes ESP serial board support
257 com0 at isa? port 0x3f8 irq 4 # Standard PC serial ports
258 com1 at isa? port 0x2f8 irq 3
259 com2 at isa? port 0x3e8 irq 5
260 #com3 at isa? port 0x2e8 irq 9
261 #ast0 at isa? port 0x1a0 irq 5 # AST 4-port serial cards
262 #com* at ast? slave ?
263 #boca0 at isa? port 0x100 irq 5 # BOCA 8-port serial cards
264 #com* at boca? slave ?
265 #rtfps0 at isa? port 0x1230 irq 10 # RT 4-port serial cards
266 #com* at rtfps? slave ?
267 #cy0 at isa? iomem 0xd4000 irq 12 # Cyclades serial cards
268
269
270 # Parallel Printer Interfaces
271
272 # PCI parallel printer interfaces
273 #lpt* at puc? port ? # || ports on "universal" comm boards
274
275 # ISA parallel printer interfaces
276 lpt0 at isa? port 0x378 irq 7 # standard PC parallel ports
277 #lpt1 at isa? port 0x278
278 #lpt2 at isa? port 0x3bc
279
280
281 # SCSI Controllers and Devices
282
283 # PCI SCSI controllers
284 #ahc* at pci? dev ? function ? # Adaptec [23]94x, aic78x0 SCSI
285 #dpt* at pci? dev ? function ? # DPT SmartCache/SmartRAID
286 #bha* at pci? dev ? function ? # BusLogic 9xx SCSI
287 #isp* at pci? dev ? function ? # Qlogic ISP [12]0x0 SCSI/FibreChannel
288 #siop* at pci? dev ? function ? # NCR 53c8xx SCSI
289 #options SIOP_SYMLED # drive the act. LED in software
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 #sea0 at isa? iomem 0xc8000 irq 5 # Seagate/Future Domain SCSI
312 #uha0 at isa? port 0x330 irq ? drq ? # UltraStor [13]4f SCSI
313 #uha1 at isa? port 0x340 irq ? drq ?
314 #wds0 at isa? port 0x350 irq 15 drq 6 # WD7000 and TMC-7000 controllers
315 #wds1 at isa? port 0x358 irq 11 drq 5
316
317 # SCSI bus support
318 #scsibus* at aha?
319 #scsibus* at ahb?
320 #scsibus* at ahc?
321 #scsibus* at aic?
322 #scsibus* at bha?
323 #scsibus* at dpt?
324 #scsibus* at isp?
325 #scsibus* at sea?
326 #scsibus* at siop?
327 #scsibus* at uha?
328 #scsibus* at wds?
329
330 # SCSI devices
331 #sd* at scsibus? target ? lun ? # SCSI disk drives
332 #st* at scsibus? target ? lun ? # SCSI tape drives
333 #cd* at scsibus? target ? lun ? # SCSI CD-ROM drives
334 #ch* at scsibus? target ? lun ? # SCSI autochangers
335 #ss* at scsibus? target ? lun ? # SCSI scanners
336 #uk* at scsibus? target ? lun ? # SCSI unknown
337
338
339 # IDE and related devices
340
341 # ISA Plug-and-Play IDE controllers
342 #wdc* at isapnp?
343
344 # PCMCIA IDE controllers
345 wdc* at pcmcia? function ?
346
347 # ISA IDE controllers
348 wdc0 at isa? port 0x1f0 irq 14 # ST506, ESDI, and IDE controllers
349 wdc1 at isa? port 0x170 irq 15
350
351 # IDE drives
352 wd* at wdc? drive ? # the drives themselves
353
354 # ATAPI bus support
355 atapibus* at wdc?
356
357 # ATAPI devices
358 cd* at atapibus? drive ? # ATAPI CD-ROM drives
359 sd* at atapibus? drive ? # ATAPI disk drives
360
361
362 # Miscellaneous mass storage devices
363
364 # ISA floppy
365 fdc0 at isa? port 0x3f0 irq 6 drq 2 # standard PC floppy controllers
366 #fdc1 at isa? port 0x370 irq ? drq ?
367 fd* at fdc? drive ? # the drives themselves
368 # some machines need you to do this instead of fd*
369 #fd0 at fdc0 drive 0
370
371 # ISA CD-ROM devices
372 #mcd0 at isa? port 0x300 irq 10 # Mitsumi CD-ROM drives
373
374 # ISA tape devices
375 # note: the wt driver conflicts unpleasantly with SMC boards at the
376 # same I/O address. The probe reprograms their EEPROMs. Don't
377 # uncomment it unless you are actually using it.
378 #wt0 at isa? port 0x308 irq 5 drq 1 # Archive and Wangtek QIC tape drives
379
380
381 # Network Interfaces
382
383 # PCI network interfaces
384 #en* at pci? dev ? function ? # ENI/Adaptec ATM
385 #ep* at pci? dev ? function ? # 3Com 3c59x/3c90x Ethernet
386 #epic* at pci? dev ? function ? # SMC EPIC/100 Ethernet
387 #esh* at pci? dev ? function ? # Essential HIPPI card
388 #fpa* at pci? dev ? function ? # DEC DEFPA FDDI
389 #fxp* at pci? dev ? function ? # Intel EtherExpress PRO 10+/100B
390 #le* at pci? dev ? function ? # PCnet-PCI Ethernet
391 #ne* at pci? dev ? function ? # NE2000-compatible Ethernet
392 #tl* at pci? dev ? function ? # ThunderLAN-based Ethernet
393 #tlp* at pci? dev ? function ? # DECchip 21x4x and clones
394
395 # EISA network interfaces
396 #ep* at eisa? slot ? # 3Com 3c579 Ethernet
397 #fea* at eisa? slot ? # DEC DEFEA FDDI
398
399 # ISA Plug-and-Play network interfaces
400 #ep* at isapnp? # 3Com 3c509 Ethernet
401 #ne* at isapnp? # NE2000-compatible Ethernet
402
403 # PCMCIA network interfaces
404 ep* at pcmcia? function ? # 3Com 3c589 and 3c562 Ethernet
405 mbe* at pcmcia? function ? # MB8696x based Ethernet
406 ne* at pcmcia? function ? # NE2000-compatible Ethernet
407 sm* at pcmcia? function ? # Megahertz Ethernet
408
409 # ISA network interfaces
410 ate0 at isa? port 0x2a0 irq ? # AT1700
411 ec0 at isa? port 0x250 iomem 0xd8000 irq 9 # 3Com 3c503 Ethernet
412 eg0 at isa? port 0x280 irq 9 # 3C505 ethernet cards
413 el0 at isa? port 0x300 irq 9 # 3C501 ethernet cards
414 ep0 at isa? port ? irq ? # 3C509 ethernet cards
415 ef0 at isa? port 0x360 iomem 0xd0000 irq 7 # 3C507
416 ai0 at isa? port 0x360 iomem 0xd0000 irq 7 # StarLAN
417 fmv0 at isa? port 0x2a0 irq ? # FMV-180 series
418 ix0 at isa? port 0x300 irq 10 # EtherExpress/16
419 iy0 at isa? port 0x360 irq ? # EtherExpress PRO 10 ISA
420 lc0 at isa? port 0x320 iomem ? irq ? # DEC EtherWORKS III (LEMAC)
421 #depca0 at isa? port 0x300 iomem 0xc8000 iosiz 0x8000 irq 5 # DEPCA
422 #le* at depca?
423 nele0 at isa? port 0x320 irq 9 drq 7 # NE2100
424 le* at nele?
425 bicc0 at isa? port 0x320 irq 10 drq 7 # BICC IsoLan
426 le* at bicc?
427 ne0 at isa? port 0x280 irq 9 # NE[12]000 ethernet cards
428 ne1 at isa? port 0x300 irq 10
429 sm0 at isa? port 0x300 irq 10 # SMC91C9x Ethernet
430 we0 at isa? port 0x280 iomem 0xd0000 irq 9 # WD/SMC Ethernet
431 we1 at isa? port 0x300 iomem 0xcc000 irq 10
432
433 # MII bus support
434 #mii* at tl?
435
436 # MII PHY network interfaces
437 #tlphy* at mii? dev ? # ThunderLAN PHYs
438 #nsphy* at mii? dev ? # NS and compatible PHYs
439 #ukphy* at mii? phy ? # generic unknown PHYs
440
441
442 # USB Controller and Devices
443
444 # PCI USB controllers
445 #uhci* at pci? # Universal Host Controller (Intel)
446 #ohci* at pci? # Open Host Controller
447
448 # USB bus support
449 #usb* at uhci?
450 #usb* at ohci?
451
452 # USB Hubs
453 #uhub* at usb?
454 #uhub* at uhub? port ?
455
456 # USB Mice
457 #ums* at uhub? port ?
458
459 # USB Keyboards
460 #ukbd* at uhub? port ?
461
462 # USB Generic HID devices
463 #uhid* at uhub? port ?
464
465 # USB Printer
466 #ulpt* at uhub? port ?
467
468 # USB Mass Storage
469 #umass* at uhub? port ? configuration ? interface ?
470 #atapibus* at umass? channel ?
471 #scsibus* at umass? channel ?
472
473 # USB Ethernet adapters
474 #aue* at uhub? port ? # ADMtek AN986 Pegasus based adapters
475 #cue* at uhub? port ? # CATC USB-EL1201A based adapters
476 #kue* at uhub? port ? # Kawasaki LSI KL5KUSB101B based adapters
477
478 # Y@P firmware loader
479 #uyap* at uhub? port ?
480
481 # USB Generic driver
482 #ugen* at uhub? port ?
483
484 # Audio Devices
485
486 # PCI audio devices
487 #eap* at pci? dev ? function ? # Ensoniq AudioPCI
488
489 # ISA Plug-and-Play audio devices
490 #guspnp* at isapnp? # Gravis Ultra Sound PnP audio
491 #sb* at isapnp? # SoundBlaster-compatible audio
492 #ym* at isapnp? # Yamaha OPL3-SA3 audio
493
494 # ISA audio devices
495 #aria0 at isa? port 0x290 irq 10 # Aria
496 #gus0 at isa? port 0x220 irq 7 drq 1 drq2 6 # Gravis Ultra Sound
497 #pas0 at isa? port 0x220 irq 7 drq 1 # ProAudio Spectrum
498 #pss0 at isa? port 0x220 irq 7 drq 6 # Personal Sound System
499 #sp0 at pss0 port 0x530 irq 10 drq 0 # sound port driver
500 #sb0 at isa? port 0x220 irq 5 drq 1 drq2 5 # SoundBlaster
501 #wss0 at isa? port 0x530 irq 10 drq 0 drq2 1 # Windows Sound System
502
503 # Audio support
504 #audio* at aria?
505 #audio* at eap?
506 #audio* at gus?
507 #audio* at guspnp?
508 #audio* at pas?
509 #audio* at sb?
510 #audio* at sp?
511 #audio* at wss?
512 #audio* at ym?
513
514 # The spkr driver provides a simple tone interface to the built in speaker.
515 #spkr0 at pcppi? # PC speaker
516
517
518 # Mice
519
520 # ISA busmice
521 #olms0 at isa? port 0x23c irq 5 # Logitech bus mouse
522 #olms1 at isa? port 0x238 irq 5
523 #omms0 at isa? port 0x23c irq 5 # Microsoft InPort mouse
524 #omms1 at isa? port 0x238 irq 5
525
526
527 # Joysticks
528
529 # ISA Plug-and-Play joysticks
530 #joy* at isapnp? # Game ports (usually on audio cards)
531
532 # ISA joysticks. Probe is a little strange; add only if you have one.
533 #joy0 at isa? port 0x201
534
535
536 # Miscellaneous Devices
537
538 # Planetconnect Satellite receiver driver.
539 #satlink0 at isa? port 0x300 drq 1
540
541
542 # Pull in optional local configuration
543 include "arch/i386/conf/GENERIC.local"
544
545
546 # Pseudo-Devices
547
548 # disk/mass storage pseudo-devices
549 #pseudo-device ccd 4 # concatenated/striped disk devices
550 #pseudo-device md 1 # memory disk device (ramdisk)
551 pseudo-device vnd 4 # disk-like interface to files
552
553 # network pseudo-devices
554 pseudo-device bpfilter 8 # Berkeley packet filter
555 pseudo-device bridge # simple inter-network bridging
556 pseudo-device ipfilter # IP filter (firewall) and NAT
557 pseudo-device loop # network loopback
558 pseudo-device ppp 2 # Point-to-Point Protocol
559 pseudo-device pppoe # PPP over Ethernet (RFC 2516)
560 #pseudo-device sl 2 # Serial Line IP
561 #pseudo-device strip 2 # Starmode Radio IP (Metricom)
562 pseudo-device tun 2 # network tunneling over tty
563
564 # miscellaneous pseudo-devices
565 pseudo-device pty # pseudo-terminals
566 #pseudo-device tb 1 # tablet line discipline
567 pseudo-device rnd # /dev/random and in-kernel generator
568 #options RND_COM # use "com" randomness as well (BROKEN)
569 pseudo-device clockctl # user control of clock subsystem
570