59 lines
1.3 KiB
Plaintext
59 lines
1.3 KiB
Plaintext
.TH KBD 3
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.SH NAME
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kbd \- pc keyboard driver
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.SH SYNOPSIS
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.nf
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.B bind -a #b /dev
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.B /dev/scancode
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.B /dev/leds
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.B /dev/repeat
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.fi
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.SH DESCRIPTION
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.PP
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The
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.I kbd
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device serves a one-level directory containing the files
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.BR scancode ,
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.BR leds
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and
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.BR repeat .
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.PP
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Reading the
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.BR scancode
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file returns the raw scancode stream as it is emitted by the keyboard
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device without any translation. It is usually
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.IR kbdfs (8)
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task to interpret the scancodes and provide device independent
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keyboard input to programs. The
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.BR scancode
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file can be only opened once by the hostowner.
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.PP
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Writing a number to the write-only
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.BR leds
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file changes the status leds on the keyboard. The value of the
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number is the addition of 1, 2 and 4 representing activated
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Scroll, Num and Caps leds.
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.PP
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The
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.BR repeat
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file sets typematic rate and delay. The value of the number is a
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bitmask where first 5 bits set the repeat rate (ranging from 0b00000
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for 30Hz to 0b11111 for 2Hz). Bits 6 and 7 set the delay before the
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first repeat is activated (ranging from 0b00 for 250Hz to 0b11 for
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1000Hz).
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.SH EXAMPLE
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Set the Scroll and Caps leds:
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.EX
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echo 5 >/dev/leds
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.EE
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.PP
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Enable fast repeat rate and the least delay:
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.EX
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echo 0 >/dev/repeat
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.EE
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.SH "SEE ALSO"
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.IR kbdfs (8)
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.SH SOURCE
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.B /sys/src/9/pc/devkbd.c
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