sys_attrs_gpc_input(5)sys_attrs_gpc_input(5)NAMEsys_attrs_gpc_input - gpc_input subsystem attributes
DESCRIPTION
This reference page lists and describes attributes for the GPC Input
(gpc_input) kernel subsystem. This subsystem handles mouse and keyboard
input for both old style LK* keyboards and serial mice, and the newer
PC-style (PS/2) keyboards and mice. In all supported scan codesets,
unique single-byte scan codes differentiate the standalone Insert,
Home, Page Up, Page Down, Delete, and End keys from the same keys on
the numeric keypad (with Num Lock toggled to off).
Refer to the sys_attrs(5) reference page for an introduction to the
topic of kernel subsystem attributes.
The gpc subsystem has a number of visible attributes. Of these, only
the following should ever be modified:
A value that identifies the scan codeset generated by the key‐
board. Only two values are supported for this attribute. The
scan codesets that these values identify differ in how internal
keyboard hardware distinguishes between the numeric keypad's Up
Arrow (entered with with Num Lock toggled off) and the stand‐
alone Up Arrow key. Keyboard hardware sends different single-
byte scan codes to distinguish the standalone Up Arrow and the
Up Arrow entered through the numeric keyboard (with Num Lock
toggled off). Keyboard hardware sends two bytes for the stand‐
alone Up Arrow and a single-byte scan code for the Up Arrow
entered through the numeric keyboard.
These values are intended to be set by system software, not
users. Although both values (scan codesets) work with most of
the HP keyboards (both LK* and PC-style) used with Tru64 UNIX
systems, 3 identifies the scan codeset that is most efficient
for these keyboards. The keyboard of the AlphaBook (laptop) com‐
puter is the only supported keyboard that requires the 2 set‐
ting. The scan codesets identified by these values may work
with other (third-party) keyboards; however, we do not test or
support other keyboards for use with Tru64 UNIX systems.
It is possible to set kbd_scancode to a 0 or 1 value. These
values are currently undefined and will result in one of the
following console errors:
gpc_input_configure: scan code not supported
ps2_input_configure: scan code not supported
These errors are displayed independently of the setting for the
gpc_developer_debug attribute.
Enables (1) or disables (0) boot- and run-time console messages
used by systems programmers to debug device driver configuration
problems.
Default value: 0 (disabled)
SEE ALSOsys_attrs(5)sys_attrs_gpc_input(5)
