$FreeBSD$ Hopefully, this list will one day be obsoleted by DEVFS, but for now this is the current allocation of device major numbers. For local use, you are encouraged to use the reserved numbers. If you intend the driver to be available, send email to the hackers@freebsd.org mailing list to see about having a number reserved for you. The most "complete" version of this will be the one in FreeBSD-current. (see http://www.freebsd.org/ or from ftp://ftp.freesoftware.com/pub/FreeBSD/) NOTICE: FreeBSD does not use block major numbers anymore, you neither need to assign nor use a block major number for any device driver any more. chrdev name comments 0 cn console 1 ctty /dev/tty 2 mm /dev/mem,kmem,etc 3 wd ST506 disk controller (with IDE extensions) 4 was:swap /dev/drum 5 pts pseudo tty "tty" half 6 ptc pseudo tty "master" half 7 log system log 8 bqu B004 transputer board 9 fd floppy disk 10 wt QIC-02/36 tape 11 spigot Video capture? 12 sc syscons/pcvt virtual consoles 13 da SCSI "direct access devices" 14 sa SCSI "sequential access devices" 15 cd SCSI "CDROM type" 16 lpt PC parallel printer port 17 ch SCSI changer 18 ?? was su 19 tw X-10 power interface 20 ?? reserved for local use 21 psm PS/2 Mouse 22 fd (/dev/stdin etc) 23 bpf Berkeley Packet Filter 24 pca PC speaker (/dev/pcaudio) 25 ?? was vat 26 spkr PC speaker (/dev/spkr) 27 mse Microsoft bus-mouse 28 sio 16450/16550 serial 29 mcd Mitsumi CDROM interface 30 snd sound driver system 31 pass SCSI "Application Pass-Thru" 32 lkmc Loadable Kernel Module Controller 33 lkm assigned to Loadable Kernel Modules 34 lkm assigned to Loadable Kernel Modules 35 lkm assigned to Loadable Kernel Modules 36 lkm assigned to Loadable Kernel Modules 37 lkm assigned to Loadable Kernel Modules 38 lkm assigned to Loadable Kernel Modules 39 apm Advanced Power Management 40 ctx Cortex 41 ?? was socksys 42 cx Cronyx/Sigma serial adapter 43 vn vnode "disk" device 44 gp GPIB 45 scd Sony CDROM interface 46 matcd Matsushita/Panasonic/Creative(SB) CDROM interface 47 gsc Genius Scanner 48 cy Cyclades 49 ?? was ssc 50 card pcmcia cards 51 joy joystick 52 tun IP tunnel device 53 snp tty snoop 54 OLDnic ISDN system 55 OLDisdn ISDN system 56 OLDity ISDN system 57 OLDitel ISDN system 58 dgb Digiboard PC/Xe 59 OLDispy ISDN system 60 OLDnnic ISDN system 61 pt SCSI "processor target" 62 worm SCSI "worm type" 63 rc Riscom/8 driver 64 ?? Talisman 65 targ SCSI target sample driver 66 labpc National Instruments LabPC 67 meteor Matrox Meteor video capture 68 si Specialix SI/XIO (peter@freebsd.org) 69 wcd ATAPI CDROM client of "wd" 71 asc AmiScan driver 72 stl Stallion (cd1400 based) (gerg@stallion.oz.au) 73 ?? was qcam 74 ccd concatenated disk 75 stli Stallion (intelligent cdk based) (gerg@stallion.oz.au) 76 scc IBM Smart Capture Card (ohashi@mickey.ai.kyutech.ac.jp) 77 cyy Cyclades Ye/PCI serial card 78 pci PCI bus 79 ipl IP Filter 80 xdcp Assigned to Chris Ficklin 81 rp RocketPort/Steve Gericke 82 ppi Generic Parallel I/O 83 can CAN16-2 CAN-PC Interface 84 dtfp Datum Time and Frequency processor (louie@UU.NET) 85 vesa VESA support device (j_mini@efn.org) 86 alog Industrial Computer Source AIO8-P driver (deprecated) 87 wfd ATAPI floppy client of "wd" 88 dpt DPT RAID Controller 89 pps Pulse-Per-Second timing interface 90 wst ATAPI tape client of "wd" 91 vinum Volume manager 92 bktr Bt848 video capture driver (hasty@star-gate.com) 93 coda CODA filesystem. 94 loran Loran-C Receiver 95 md Memory Disk 96 altq alternate queueing (including cbq, red, wfq) 97 prom Alpha PROM console 98 loe Loopback pseudo-ethernet (sbabkin@dcn.att.com) 99 ct Cronyx/Tau serial adaptor 100 xrpu Xilinx Reprogrammable Processing Unit 101 dgm Digiboard PC/Xem 102 fla M-Systems DiskOnChip(r) 103 streams SVR4 Streams emulation 104 xpt CAM Transport Layer Services 105 iic I2C bus generic i/o 106 smb System Management Bus generic i/o 107 3dfx 3Dfx driver 108 usb Universal Serial Bus 109 ida Intelligent Disk [Array] (md@doc.ic.ac.uk) 110 ses SCSI Environmental Services driver (mjacob@feral.com) 111 ums USB Mouse 112 kbd keyboard 113 ulpt USB Printer 114 ugen USB Generic device 115 dag University of Waikato DAG network capture boards 116 ad ATA disks 117 acd ATAPI CDROM 118 afd ATAPI floppy 119 ast ATAPI tape 120 aud Audit Device 121 onew Dallas Semiconductor One-Wire bus 122 uhid USB HID devices 123 fb frame buffer 124 ucdc USB Communication Class Driver 125 digio Advantech PCI-1750 IO card jen@vulture.dmem.strath.ac.uk 126 sync Generic sync port support , 127 fire Firewire driver 128 arla Arla (AFS-clone) driver 129 i2o Intelligent I/O Character Device 130 mlx Mylex DAC960 RAID (control device) 131 mlxd Mylex DAC960 RAID (disk device) 132 amr AMI MegaRAID (control device) 133 amrd AMI MegaRAID (disk device) 134 taupci Cronyx Tau-PCI card 135 zsc TurboLaser console uart 136 ipr Iprobe on-chip perf. counters (gallatin@freebsd.org) 137 nfp nFast PCI crypto accelerator (support@ncipher.com) 138 usio USB Serial support 139 wanrouter Sangoma Technologies Inc. (al.feldman@sangoma.com) 140 pcfclock PCFCLOCK 141 pcdmx PCDMX theatre lighting controller 142 skip SKIP port (security/skip) control device 143 urio USB Rio 500 144 nsmb SMB/CIFS protocol interface 145 dri DRI Graphics for OpenGL 146 twe 3ware Escalade ATA RAID (controller) 147 twed 3ware Escalade ATA RAID (drives) 148 agp AGP 149 tap Ethernet tunneling device 150 aac Adaptec FSA RAID (controller) 151 aacd Adaptec FSA RAID (drives) 152 acpi ACPI bios support (Takanori Watanabe takawata@shidahara1.planet.sci.kobe-u.ac.jp) 153 ti Tigon Gigabit Ethernet driver (ken@FreeBSD.ORG) 154 asr Adaptec SCSI RAID 155 phone Quicknet PhoneJACK and LineJACK cards for VoIP 156 uscanner USB Scanners 157 ar ATA "pseudo" RAID device 200 ?? entries from 200-252 are reserved for local use 252 ?? entries from 200-252 are reserved for local use 253 mfs Used by MFS 254 internal Used internally by the kernel 255 bad choice -1 is 255 which has magic meanings internally