2.9BSD/usr/man/cat5/dtab.5

DTAB(5)             UNIX Programmer's Manual              DTAB(5)

NAME
     dtab - table of devices for automatic system configuration

DESCRIPTION
     The dtab file contains a list of the devices that the _a_u_t_o_-
     _c_o_n_f_i_g program will attempt to attach to the system.

     Each line describes one device which may be present on the
     system; additional devices of the same type require addi-
     tional lines.  The line contains at least six fields
     separated by white space and terminated by a semicolon.  The
     fields are (in order):

     dev         The device name, usually two characters

     unit        Either a unit number or a ? indicating automatic
                 selection of unit numbers

     addr        The address of the device's first register, as a
                 16-bit octal number

     vector      The interrupt vector, in octal

     BR          The priority at which the device interrupts

     handler(s)  One or more routine names with which the inter-
                 rupt vector is filled.

     The "#" is the comment indicator and all characters from "#"
     to the end of the line are ignored.

EXAMPLE
     Here is an example dtab file:

     #               Device Configuration Table
     #    Clock and console are pre-configured and should not be listed here
     #
     # Dev#      Addr    Vector  Br Handler(s)      ; Comment
     lp   0      177514  200     4  lpintr          ; line printer
     ht   0      172440  224     5  htintr          ; tu 16 massbus tape
     xp   ?      176700  254     5  xpintr          ; disk drive
     dm   ?      170500  300     4  dmint           ; DM-11 BB DH Modem Control
     dh   ?      160020  310     5  dhrint dhxint   ; dh11 terminal mux
     dz   ?      160140  340     5  dzrint dzdma    ; dz11 terminal mux

FILES
     /etc/dtab           device table

SEE ALSO
     autoconfig(8)

Printed 8/1/83                                                  1