sys_attrs_gpc_input(5)						File Formats Manual					    sys_attrs_gpc_input(5)

NAME

       sys_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 key-
       board input for both old style LK* keyboards and serial mice, and the newer PC-style (PS/2) keyboards and mice. In all supported scan code-
       sets,  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 keyboard. Only two values are supported for this attribute. The scan code-
	      sets  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 standalone 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 standalone Up Arrow and a single-byte scan code for the Up Arrow entered through the  numeric  key-
	      board.

	      These values are intended to be set by system software, not users. Although both values (scan codesets) work with most of the Compaq
	      keyboards (both LK* and PC-style) used with Tru64 UNIX systems, 3 identifies the scan codeset that is most efficient for these  key-
	      boards.  The keyboard of the AlphaBook (laptop) computer is the only supported keyboard that requires the 2 setting.  The scan code-
	      sets identified by these values may work with other (third-party) keyboards; however, Compaq does not test  or  support  other  key-
	      boards 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 ALSO

       sys_attrs(5)

															    sys_attrs_gpc_input(5)