1DTAB(5) File Formats Manual DTAB(5)
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6 dtab - automatic system configuration device table (2BSD)
7
9 The dtab file contains a list of the devices that the autoconfig(8)
10 program will attempt to attach to the system.
11 Each line describes one device which may be present on the system;
13 additional devices of the same type require additional lines. The line
14 contains at least six fields separated by white space. Blank lines and
15 comments can appear anywhere in the file except between fields; com‐
16 ments are delimited by `#' and new line. The fields are (in order):
17 dev The device name, usually two characters
19 unit Either a unit number or a `?' indicating automatic selec‐
21 tion of unit numbers.
22 addr The address of the device's first register, as a 16-bit
24 octal number.
25 vector The interrupt vector, in octal.
27 BR The priority at which the device interrupts.
29 handler(s) One or more routine names with which the interrupt vector
31 is filled.
32
34 # Device Configuration Table
35 # Clock and console are pre-configured and should not be listed here
36 #
37 # Dev# Addr Vector Br Handler(s) # Comment
38 lp ? 177514 200 4 lpio # lp-11 line printer
39 ht 0 172440 224 5 htintr # tu 16 massbus tape
40 xp ? 176700 254 5 xpio # xp driver
41 dm ? 170500 310 4 dmin # dm11 dh modem control
42 dh ? 160020 320 5 dhin dhou # dh11 terminal mux
43 dz ? 160110 330 5 dzin dzdma # dz11 terminal mux
44
46 /etc/dtab device table
47
49 autoconfig(8)
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52 /Etc/dtab is unique to the PDP-11 and 2BSD.
533rd Berkeley Distribution January 22, 1987 DTAB(5)