hilkbd(7)hilkbd(7)NAMEhilkbd - HP-HIL mapped keyboard driver
DESCRIPTION
HP-HIL, the Hewlett-Packard Human Interface Link, is the Hewlett-
Packard standard for interfacing a personal computer, terminal, or
workstation to its input devices. supplies input from all mapped key‐
boards on a specified HP-HIL link.
returns mapped keycodes, not ASCII characters. "Raw" keycodes are the
individual key downstrokes and upstrokes, and are different for each
type of keyboard. maps the raw input into the keycodes and protocol
expected by the HP-UX, Pascal Workstation, and BASIC/UX operating sys‐
tems. The driver can usurp a keyboard from by changing it from mapped
mode to raw mode.
System Calls
gives exclusive access to the keyboard. If there is an ITE (internal
terminal emulator) associated with the keyboard, the ITE loses input
from the keyboard until the keyboard device is closed. Any previous
queued input for the keyboard device is flushed from the input queue.
returns control of the keyboard to the ITE, if present. Any unread
input is discarded at that time.
returns data from the keyboard in time-stamped packets:
time_stamp, when repacked into an integer data type of four or more
bytes, specifies the time since an arbitrary point in the past (for
example, system start-up time). This point does not change between
packets, but time during a power failure may or may not be counted.
The time is in units of tens of milliseconds.
The status byte encodes the state of the keyboard and keys:
0x8X shift and control
0x9X control only
0xAX shift only
0xBX no shift or control
The data byte contains the actual keystroke.
If the file status flag O_NDELAY is set, returns instead of blocking,
when no data is available. The system call on an HP-HIL keyboard is
considered "slow"; that is, it can be interrupted by caught signals
(see signal(2)).
is not supported by
can be used to poll for input to read from devices. for write or for
exceptional conditions always returns a false indication in the bit
masks.
is used to perform special operations on the device. system calls have
the form:
The following request codes are defined in
Read the configuration code.
This request returns a one-byte configuration code in
the variable to which arg points. This contains a
field, defined by which specifies the keyboard identifi‐
cation code. The possible values of this field are
defined in the header file, and this identification code
affects interpretation of the language code. All other
fields in the configuration code are currently unde‐
fined.
Read the language code.
This request returns a one-byte language code, as read
from the keyboard, in the variable to which arg points.
If there is more than one keyboard, the language is
taken from the first keyboard on the link. Interpreta‐
tion of the language code is affected by the keyboard
identification field within the configuration code.
Read the keyboard status register.
This request returns a one-byte value containing bit
flags specifying the state of the shift and control keys
in the variable to which arg points:
KBD_STAT_LEFTSHIFT The left shift key is up
KBD_STAT_RIGHTSHIFT The right shift key is up
KBD_STAT_SHIFT Both shift keys are up
KBD_STAT_CTRL The control key is up
Other bits are undefined.
Set the keyboard auto-repeat rate.
The one-byte value to which arg points is the negative
of the repeat period, in tens of milliseconds. The
repeat rate is the reciprocal of the repeat period. A
parameter of zero disables auto-repeat.
Set the keyboard auto-repeat delay.
The one-byte value to which arg points is the negative
of the repeat delay, in tens of milliseconds.
Cause an audible beep.
The one-byte value to which arg points specifies the
volume of the beep, within the range through Implementa‐
tions with fewer than discrete levels of volume will
scale the parameter into the smaller range.
ERRORS
An invalid parameter was detected by
A signal was caught during a
system call.
No keyboard is present on the HP-HIL
link specified by the minor number.
An attempt was made to use
using
The device is already open.
AUTHOR
was developed by the Hewlett-Packard Company.
FILES
/dev/hilkbd*
SEE ALSOmknod(1M), select(2), signal(2), hil(7), termio(7).
hilkbd(7)
