1 1.10 wiz # $NetBSD: P6032,v 1.10 2002/07/22 15:10:53 wiz Exp $ 2 1.1 thorpej # 3 1.1 thorpej # Algorithmics P-6032 kernel. 4 1.1 thorpej # 5 1.1 thorpej 6 1.1 thorpej include "arch/algor/conf/std.algor" 7 1.1 thorpej 8 1.8 atatat #options INCLUDE_CONFIG_FILE # embed config file in kernel binary 9 1.8 atatat 10 1.10 wiz #ident "P6032-$Revision: 1.10 $" 11 1.1 thorpej 12 1.1 thorpej maxusers 32 13 1.1 thorpej 14 1.1 thorpej # Platform Support 15 1.1 thorpej #options ALGOR_P4032 # Algorithmics P-4032 16 1.1 thorpej #options ALGOR_P5064 # Algorithmics P-5064 17 1.1 thorpej options ALGOR_P6032 # Algorithmics P-6032 18 1.1 thorpej 19 1.1 thorpej options MIPS3_L2CACHE_ABSENT # No L2 cache on this machine 20 1.1 thorpej 21 1.1 thorpej # Standard system options 22 1.1 thorpej options KTRACE # System call tracing support 23 1.1 thorpej options NTP # kernel PLL for NTP 24 1.1 thorpej 25 1.1 thorpej # Diagnostic/debugging support options 26 1.1 thorpej options DIAGNOSTIC # Cheap kernel consistency checks 27 1.1 thorpej options DDB # kernel debugger 28 1.1 thorpej makeoptions DEBUG="-g" 29 1.1 thorpej #makeoptions DEBUGLIST="pattern1 pattern2 ..." 30 1.1 thorpej 31 1.1 thorpej # File systems 32 1.1 thorpej file-system FFS # Fast file system 33 1.1 thorpej file-system MFS # Memory-based file system 34 1.1 thorpej file-system CD9660 # ISO-9660 CD-ROM FS (w/RockRidge extensions) 35 1.1 thorpej file-system MSDOSFS # MS-DOS-compatible file system 36 1.1 thorpej file-system NTFS # Windows/NT file system (experimental) 37 1.1 thorpej file-system NFS # Sun NFS-compatible file system client 38 1.1 thorpej file-system KERNFS # Kernel variable file system (/kern) 39 1.1 thorpej file-system PROCFS # Process file system (/proc) 40 1.1 thorpej file-system FDESC # /dev/fd file system 41 1.1 thorpej 42 1.1 thorpej # File system options 43 1.1 thorpej options NFSSERVER # Sun NFS-compatible file system server 44 1.1 thorpej #options FFS_EI # FFS Endian Independant support 45 1.1 thorpej options SOFTDEP # FFS soft updates support. 46 1.1 thorpej 47 1.1 thorpej # Networking options 48 1.1 thorpej options INET # Internet protocol suite 49 1.1 thorpej options INET6 # IPV6 50 1.1 thorpej options IPSEC # IP security 51 1.1 thorpej options IPSEC_ESP # IP security (encryption part; define w/IPSEC) 52 1.1 thorpej #options IPSEC_DEBUG # debug for IP security 53 1.1 thorpej 54 1.1 thorpej # 4.3BSD compatibility. Should be optional, but necessary for now. 55 1.1 thorpej options COMPAT_43 56 1.1 thorpej 57 1.1 thorpej # Binary compatibility with previous versions of NetBSD. 58 1.1 thorpej #options COMPAT_09 59 1.1 thorpej options COMPAT_10 60 1.1 thorpej options COMPAT_11 61 1.1 thorpej options COMPAT_12 62 1.1 thorpej options COMPAT_13 63 1.1 thorpej options COMPAT_14 64 1.1 thorpej 65 1.1 thorpej # System V-like message queues 66 1.1 thorpej options SYSVMSG 67 1.1 thorpej 68 1.1 thorpej # System V-like semaphores 69 1.1 thorpej options SYSVSEM 70 1.1 thorpej 71 1.1 thorpej # System V-like shared memory 72 1.1 thorpej options SYSVSHM 73 1.1 thorpej #options SHMMAXPGS=1024 # 1024 pages is the default 74 1.1 thorpej 75 1.1 thorpej # Loadable Kernel Modules 76 1.1 thorpej options LKM 77 1.1 thorpej 78 1.1 thorpej # Disable kernel security. 79 1.1 thorpej #options INSECURE 80 1.1 thorpej 81 1.1 thorpej # Misc. options 82 1.1 thorpej options PCI_NETBSD_CONFIGURE # NetBSD configures the PCI bus 83 1.1 thorpej options PCIVERBOSE # recognize "unknown" PCI devices 84 1.1 thorpej options MIIVERBOSE # verbose PHY autoconfig messages 85 1.1 thorpej #options PCI_CONFIG_DUMP # verbosely dump PCI config space 86 1.1 thorpej options SCSIVERBOSE # Verbose SCSI errors 87 1.1 thorpej options UCONSOLE # users can use TIOCCONS (for xconsole) 88 1.1 thorpej #options PCMCIAVERBOSE 89 1.5 jdolecek #options PIPE_SOCKETPAIR # smaller, but slower pipe(2) 90 1.1 thorpej 91 1.1 thorpej # The Alpha console firmware network boots using the BOOTP 92 1.1 thorpej # protocol, so we ask the NFS code to use BOOTP/DHCP as well, 93 1.1 thorpej # in case we have NFS root. 94 1.1 thorpej options NFS_BOOT_DHCP # superset of BOOTP 95 1.1 thorpej 96 1.1 thorpej # WS console uses SUN or VT100 terminal emulation 97 1.1 thorpej #options WSEMUL_VT100 98 1.1 thorpej 99 1.1 thorpej config netbsd root on ? type ? 100 1.1 thorpej #config netbsd root on sd0 type ffs 101 1.1 thorpej #config netbsd root on ? type nfs 102 1.1 thorpej 103 1.1 thorpej mainbus0 at root 104 1.1 thorpej cpu* at mainbus0 105 1.1 thorpej 106 1.1 thorpej # PCI host bus adapter support 107 1.1 thorpej bonito* at mainbus? 108 1.1 thorpej 109 1.1 thorpej # PCI bus support 110 1.1 thorpej pci* at bonito? 111 1.1 thorpej 112 1.1 thorpej # PCI devices 113 1.1 thorpej #adv* at pci? dev ? function ? # AdvanSys SCSI 114 1.1 thorpej #adw* at pci? dev ? function ? # AdvanSys Wide SCSI 115 1.10 wiz #options SCSI_ADW_WDTR_DISABLE # disable WDTR 116 1.10 wiz #options SCSI_ADW_SDTR_DISABLE # disable SDTR 117 1.10 wiz #options SCSI_ADW_TAGQ_DISABLE # disable Tag Queuing 118 1.1 thorpej #ahc* at pci? dev ? function ? # Adaptec [23]94x, aic78x0 SCSI 119 1.1 thorpej #bha* at pci? dev ? function ? # BusLogic 9xx SCSI (untested) 120 1.1 thorpej #cac* at pci? dev ? function ? # Compaq array controller (untested) 121 1.1 thorpej #cy* at pci? dev ? function ? # Cyclades Cyclom-Y (untested) 122 1.1 thorpej #cz* at pci? dev ? function ? # Cyclades-Z (untested) 123 1.1 thorpej #dpt* at pci? dev ? function ? # DPT SmartCache/SmartRAID 124 1.1 thorpej #eap* at pci? dev ? function ? # Ensoniq AudioPCI 125 1.1 thorpej #en* at pci? dev ? function ? # ENI PCI ATM (untested) 126 1.1 thorpej #ep* at pci? dev ? function ? # 3COM 3c59x 127 1.1 thorpej #epic* at pci? dev ? function ? # SMC EPIC/100 Ethernet 128 1.1 thorpej #eso* at pci? dev ? function ? # ESS Solo-1 PCI AudioDrive 129 1.1 thorpej #ex* at pci? dev ? function ? # 3COM 3c90x[B] Ethernet 130 1.1 thorpej #fpa* at pci? dev ? function ? # DEC DEFPA FDDI 131 1.1 thorpej #fxp* at pci? dev ? function ? # Intel EEPRO 10+/100B 132 1.1 thorpej #gsip* at pci? dev ? function ? # NS DP83820 Gigabit Ethernet 133 1.1 thorpej #isp* at pci? dev ? function ? # Qlogic ISP 10x0 SCSI 134 1.4 thorpej pcn* at pci? dev ? function ? # AMD PCnet-PCI Ethernet 135 1.1 thorpej pcib* at pci? dev ? function ? # Intel PCI-ISA Bridges 136 1.1 thorpej #siop* at pci? dev ? function ? # Symbios 53c8xx SCSI 137 1.1 thorpej #mlx* at pci? dev ? function ? # Mylex DAC960 / DEC SWXCR (untested) 138 1.1 thorpej #ne* at pci? dev ? function ? # NE2000-compatible Ethernet 139 1.1 thorpej #ohci* at pci? dev ? function ? # USB Open Host Controller 140 1.1 thorpej pciide* at pci? dev ? function ? # PCI IDE controllers 141 1.1 thorpej #pcscp* at pci? dev ? function ? # AMD Am53c974 PCscsi-PCI 142 1.1 thorpej ppb* at pci? dev ? function ? # PCI-PCI Bridges 143 1.1 thorpej #rtk* at pci? dev ? function ? # RealTek 8129/8139 Ethernet 144 1.1 thorpej #sip* at pci? dev ? function ? # SiS 900 Ethernet 145 1.1 thorpej #sv* at pci? dev ? function ? # S3 SonicVibes 146 1.1 thorpej #tga* at pci? dev ? function ? # DEC ZLXp-E[123] Graphics 147 1.1 thorpej #ti* at pci? dev ? function ? # Alteon Tigon Gig-E 148 1.1 thorpej #tl* at pci? dev ? function ? # TI ThunderLAN Ethernet 149 1.1 thorpej #tlp* at pci? dev ? function ? # DECchip 21x4x and clones 150 1.1 thorpej #uhci* at pci? dev ? function ? # USB Univ. Host Controller 151 1.1 thorpej #vga* at pci? dev ? function ? # PCI VGA Graphics 152 1.1 thorpej #vr* at pci? dev ? function ? # VIA Rhine Fast Ethernet 153 1.1 thorpej #yds* at pci? dev ? function ? # Yamaha DS-1 PCI Audio 154 1.1 thorpej 155 1.1 thorpej #audio* at eap? 156 1.1 thorpej #audio* at eso? 157 1.1 thorpej #audio* at sv? 158 1.1 thorpej #audio* at yds? 159 1.1 thorpej 160 1.1 thorpej #opl* at eso? 161 1.1 thorpej #opl* at sv? 162 1.1 thorpej #opl* at yds? 163 1.1 thorpej 164 1.1 thorpej #mpu* at eso? 165 1.1 thorpej #mpu* at yds? 166 1.1 thorpej 167 1.1 thorpej # MII/PHY support 168 1.4 thorpej acphy* at mii? phy ? # Altima AC101 and AMD Am79c874 PHYs 169 1.4 thorpej amhphy* at mii? phy ? # AMD 79c901 10BASE-T PHY 170 1.4 thorpej #bmtphy* at mii? phy ? # Broadcom BCM5201 and BCM5202 PHYs 171 1.4 thorpej #brgphy* at mii? phy ? # Broadcom BCM5400-family PHYs 172 1.4 thorpej #dmphy* at mii? phy ? # Davicom DM9101 PHYs 173 1.1 thorpej #exphy* at mii? phy ? # 3Com internal PHYs 174 1.4 thorpej #glxtphy* at mii? phy ? # Level One LXT-1000 PHYs 175 1.4 thorpej #gphyter* at mii? phy ? # NS83861 Gig-E PHY 176 1.6 wiz #icsphy* at mii? phy ? # Integrated Circuit Systems ICS189x 177 1.1 thorpej #inphy* at mii? phy ? # Intel 82555 PHYs 178 1.4 thorpej #iophy* at mii? phy ? # Intel 82553 PHYs 179 1.4 thorpej lxtphy* at mii? phy ? # Level One LXT-970 PHYs 180 1.4 thorpej #makphy* at mii? phy ? # Margell Semiconductor 88E1000 PHYs 181 1.4 thorpej nsphy* at mii? phy ? # NS83840 PHYs 182 1.4 thorpej #nsphyter* at mii? phy ? # NS83843 PHYs 183 1.4 thorpej #qsphy* at mii? phy ? # Quality Semiconductor QS6612 PHYs 184 1.4 thorpej pnaphy* at mii? phy ? # generic HomePNA PHYs 185 1.1 thorpej #nsphy* at mii? phy ? # NS83840 PHYs 186 1.1 thorpej #sqphy* at mii? phy ? # Seeq 80220/80221/80223 PHYs 187 1.1 thorpej #tlphy* at mii? phy ? # ThunderLAN PHYs 188 1.4 thorpej #tqphy* at mii? phy ? # TDK Semiconductor PHYs 189 1.4 thorpej ukphy* at mii? phy ? # generic unknown PHYs 190 1.1 thorpej 191 1.1 thorpej # ISA/EISA bus support 192 1.1 thorpej isa* at pcib? 193 1.1 thorpej #isapnp* at isa? 194 1.1 thorpej 195 1.1 thorpej # ISA devices 196 1.1 thorpej mcclock* at isa? port 0x70 197 1.1 thorpej #pckbc* at isa? # PC keyboard controller 198 1.1 thorpej #pckbd* at pckbc? # PC keyboard (kbd port) 199 1.1 thorpej #pms* at pckbc? # PS/2-style mouse (aux port) 200 1.1 thorpej #pcppi* at isa? # PC prog. periph. interface 201 1.1 thorpej #spkr0 at pcppi? # IBM BASIC emulation 202 1.1 thorpej #isabeep0 at pcppi? # "keyboard" beep 203 1.1 thorpej #midi* at pcppi? 204 1.1 thorpej com* at isa? port 0x3f8 irq 4 # standard serial ports 205 1.1 thorpej com* at isa? port 0x2f8 irq 3 206 1.1 thorpej #cs* at isa? port 0x300 iomem ? irq ? drq ? # CS8900 Ethernet 207 1.1 thorpej #ec0 at isa? port 0x250 iomem 0xd8000 irq 9 # 3Com 3c503 Ethernet 208 1.1 thorpej #ep* at isa? port ? irq ? # 3COM 3c509 Ethernet 209 1.1 thorpej #ep* at isapnp? 210 1.1 thorpej #ix0 at isa? port 0x300 irq 10 # EtherExpress/16 211 1.1 thorpej #iy0 at isa? port 0x360 irq ? # EtherExpress PRO 10 ISA 212 1.1 thorpej fdc0 at isa? port 0x3f0 irq 6 drq 2 # floppy controller 213 1.1 thorpej #lc0 at isa? port 0x300 iomem ? irq ? # DEC EtherWORKS III (LEMAC) 214 1.1 thorpej #lc1 at isa? port 0x320 iomem ? irq ? # DEC EtherWORKS III (LEMAC) 215 1.1 thorpej #depca0 at isa? port 0x300 iomem 0xd0000 iosiz 0x10000 irq 5 # DEPCA 216 1.1 thorpej #depca1 at isa? port 0x200 iomem 0xd8000 iosiz 0x8000 irq 10 # DEPCA 217 1.1 thorpej #le* at depca? 218 1.1 thorpej #lpt* at isa? port 0x3bc irq 7 # standard parallel port 219 1.1 thorpej #vga* at isa? # ISA (EISA: XXX) VGA 220 1.1 thorpej #wdc0 at isa? port 0x1f0 irq 14 # ST506/ESDI/IDE controllers 221 1.1 thorpej #wdc1 at isa? port 0x170 irq 15 222 1.1 thorpej #wdc* at isapnp? 223 1.2 lukem #we0 at isa? port 0x280 iomem 0xd0000 irq 9 # WD/SMC Ethernet 224 1.2 lukem #we1 at isa? port 0x300 iomem 0xcc000 irq 10 225 1.1 thorpej #wss* at isa? port 0x530 irq 9 drq 0 # Windows Sound System 226 1.1 thorpej #wss* at isapnp? 227 1.1 thorpej #audio* at wss? 228 1.1 thorpej #midi* at wss? 229 1.1 thorpej #sb* at isa? port 0x220 irq 5 drq 1 # SoundBlaster 230 1.1 thorpej #sb* at isapnp? 231 1.1 thorpej #audio* at sb? 232 1.1 thorpej #adv* at isa? port ? irq ? drq ? # AdvanSys APB-514[02] 233 1.1 thorpej #aha* at isa? port 0x330 irq ? drq ? # Adaptec 154[02] SCSI 234 1.1 thorpej #aha* at isa? port 0x334 irq ? drq ? # Adaptec 154[02] SCSI 235 1.1 thorpej #bha* at isa? port 0x330 irq ? drq ? # BusLogic [57]4X SCSI (unt.) 236 1.1 thorpej #bha* at isa? port 0x334 irq ? drq ? # BusLogic [57]4X SCSI (unt.) 237 1.1 thorpej #uha* at isa? port 0x330 irq ? drq ? # UltraStor [13]4f SCSI (unt.) 238 1.1 thorpej #uha* at isa? port 0x334 irq ? drq ? # UltraStor [13]4f SCSI (unt.) 239 1.1 thorpej #pcic0 at isa? port 0x3e0 iomem 0xd0000 iosiz 0x10000 240 1.1 thorpej #pcic1 at isa? port 0x3e2 iomem 0xcc000 iosiz 0x10000 241 1.1 thorpej #pcmcia* at pcic? controller ? socket ? 242 1.1 thorpej 243 1.1 thorpej # PCMCIA device 244 1.1 thorpej #aic* at pcmcia? function ? # Adaptec APA-1460 SCSI 245 1.1 thorpej #com* at pcmcia? function ? # Modems and serial cards 246 1.1 thorpej #wdc* at pcmcia? function ? # PCMCIA IDE controllers 247 1.1 thorpej #ep* at pcmcia? function ? # 3Com 3c589 and 3c562 Eth. 248 1.1 thorpej #mbe* at pcmcia? function ? # MB8696x based Ethernet 249 1.1 thorpej #ne* at pcmcia? function ? # NE2000-compatible Eth. 250 1.1 thorpej #sm* at pcmcia? function ? # Megahertz Ethernet 251 1.1 thorpej #ray* at pcmcia? function ? # Raytheon Raylink (802.11) 252 1.1 thorpej #wi* at pcmcia? function ? # Lucent WaveLAN/IEEE 253 1.1 thorpej 254 1.1 thorpej # SCSI bus support 255 1.1 thorpej #scsibus* at adv? 256 1.1 thorpej #scsibus* at adw? 257 1.1 thorpej #scsibus* at aha? 258 1.1 thorpej #scsibus* at ahb? 259 1.1 thorpej #scsibus* at ahc? 260 1.1 thorpej #scsibus* at aic? 261 1.1 thorpej #scsibus* at bha? 262 1.1 thorpej #scsibus* at dpt? 263 1.1 thorpej #scsibus* at isp? 264 1.1 thorpej #scsibus* at siop? 265 1.1 thorpej #scsibus* at pcscp? 266 1.1 thorpej #scsibus* at uha? 267 1.1 thorpej 268 1.1 thorpej # SCSI devices 269 1.1 thorpej #cd* at scsibus? target ? lun ? # SCSI CD-ROM drives 270 1.1 thorpej #sd* at scsibus? target ? lun ? # SCSI disk drives 271 1.1 thorpej #st* at scsibus? target ? lun ? # SCSI tape drives 272 1.1 thorpej 273 1.1 thorpej # ST506/ESDI/IDE devices 274 1.1 thorpej wd* at pciide? channel ? 275 1.1 thorpej #wd* at wdc? drive ? 276 1.1 thorpej 277 1.1 thorpej # ATAPI bus support 278 1.1 thorpej atapibus* at pciide? channel ? 279 1.1 thorpej #atapibus* at wdc? 280 1.1 thorpej 281 1.1 thorpej # ATAPI devices 282 1.1 thorpej sd* at atapibus? drive ? # ATAPI disk devices 283 1.1 thorpej cd* at atapibus? drive ? # ATAPI CD-ROM devices 284 1.1 thorpej 285 1.1 thorpej # Floppy drives 286 1.1 thorpej fd* at fdc? drive ? 287 1.1 thorpej 288 1.1 thorpej # Hardware RAID devices 289 1.1 thorpej #ld* at cac? unit ? 290 1.1 thorpej #ld* at mlx? unit ? 291 1.1 thorpej 292 1.1 thorpej # USB bus support 293 1.1 thorpej #usb* at uhci? 294 1.1 thorpej #usb* at ohci? 295 1.1 thorpej 296 1.1 thorpej # USB Hubs 297 1.1 thorpej #uhub* at usb? 298 1.1 thorpej #uhub* at uhub? port ? configuration ? interface ? 299 1.1 thorpej 300 1.3 augustss # USB HID device 301 1.3 augustss #uhidev* at uhub? port ? configuration ? interface ? 302 1.3 augustss 303 1.1 thorpej # USB Mice 304 1.3 augustss #ums* at uhidev? reportid ? 305 1.1 thorpej #wsmouse* at ums? 306 1.1 thorpej 307 1.1 thorpej # USB Keyboards 308 1.3 augustss #ukbd* at uhidev? reportid ? 309 1.1 thorpej #wskbd* at ukbd? console ? 310 1.1 thorpej 311 1.1 thorpej # USB Generic HID devices 312 1.3 augustss #uhid* at uhidev? reportid ? 313 1.1 thorpej 314 1.1 thorpej # USB Printer 315 1.1 thorpej #ulpt* at uhub? port ? configuration ? interface ? 316 1.1 thorpej 317 1.1 thorpej # USB Modem 318 1.1 thorpej #umodem* at uhub? port ? configuration ? 319 1.1 thorpej #ucom* at umodem? 320 1.1 thorpej 321 1.1 thorpej # USB Mass Storage 322 1.1 thorpej #umass* at uhub? port ? configuration ? interface ? 323 1.1 thorpej #atapibus* at umass? channel ? 324 1.1 thorpej #scsibus* at umass? channel ? 325 1.1 thorpej 326 1.1 thorpej # USB Ethernet adapters 327 1.1 thorpej #aue* at uhub? port ? # ADMtek AN986 Pegasus based adapters 328 1.1 thorpej #cue* at uhub? port ? # CATC USB-EL1201A based adapters 329 1.1 thorpej #kue* at uhub? port ? # Kawasaki LSI KL5KUSB101B based adapters 330 1.1 thorpej 331 1.1 thorpej # Serial adapters 332 1.1 thorpej # FTDI FT8U100AX serial adapter 333 1.1 thorpej #uftdi* at uhub? port ? 334 1.1 thorpej #ucom* at uftdi? portno ? 335 1.1 thorpej 336 1.1 thorpej # USB scanners 337 1.1 thorpej #uscanner* at uhub? port ? 338 1.1 thorpej 339 1.1 thorpej # Y@P firmware loader 340 1.1 thorpej #uyap* at uhub? port ? 341 1.1 thorpej 342 1.1 thorpej # USB Generic driver 343 1.1 thorpej #ugen* at uhub? port ? 344 1.1 thorpej 345 1.1 thorpej # Workstation Console attachments 346 1.1 thorpej #wsdisplay* at vga? 347 1.1 thorpej #wskbd* at pckbd? 348 1.1 thorpej #wsmouse* at pms? 349 1.1 thorpej 350 1.1 thorpej pseudo-device bpfilter 16 351 1.1 thorpej pseudo-device ccd 4 352 1.1 thorpej #pseudo-device raid 4 # RAIDframe disk driver 353 1.2 lukem #options RAID_AUTOCONFIG # auto-configuration of RAID components 354 1.1 thorpej pseudo-device ipfilter 1 355 1.1 thorpej pseudo-device loop 1 356 1.1 thorpej pseudo-device md 1 357 1.1 thorpej pseudo-device ppp 4 358 1.1 thorpej pseudo-device pty # pseudo-terminals 359 1.1 thorpej pseudo-device sl 4 360 1.1 thorpej pseudo-device vnd 4 361 1.1 thorpej #pseudo-device gre 2 # generic L3 over IP tunnel 362 1.1 thorpej pseudo-device gif 4 # IPv[46] over IPv[46] tunnel (RFC1933) 363 1.1 thorpej #pseudo-device faith 1 # IPv[46] tcp relay translation i/f 364 1.1 thorpej #pseudo-device stf 1 # 6to4 IPv6 over IPv4 encapsulation 365 1.1 thorpej pseudo-device vlan # IEEE 802.1q encapsulation 366 1.1 thorpej pseudo-device sequencer 1 # MIDI sequencer 367 1.1 thorpej pseudo-device rnd # /dev/random and in-kernel generator 368 1.1 thorpej #options RND_COM # use "com" randomness too 369 1.9 lukem pseudo-device clockctl # user control of clock subsystem 370