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sys_attrs_ace(5)					     sys_attrs_ace(5)



NAME

  sys_attrs_ace	- ace subsystem	attributes

DESCRIPTION

  This reference page lists and	describes attributes for the serial driver
  (ace)	kernel subsystem, used only on the DEC 2000, AlphaServer, and AlphaS-
  tation family	of processors. Refer to	the sys_attrs(5) reference page	for
  an introduction to the topic of kernel subsystem attributes.



  ace_cnt
      Number of	communication ports configured for the system. The ace_cnt
      value is query only and cannot be	changed	directly by users.

      Default value: 0

      Minimum value: 0

      Maximum value: 8



  ace_debug
      A	value that turns ace debugging mode on (1) or off (0).

      Default value: 0 (off)

      Do not modify the	default	value of this attribute	unless instructed to
      do so by support personnel.



  ace_major
      The major	number assigned	to device special files	/dev/tty0n (where n
      equals 0 to 8). The ace_major value is query only	and cannot be changed
      directly by users.

      Default value: 35

      Minimum value: 0

      Maximum value: 512



  dcd_timer
      The number of seconds that Data Carrier Detect must be done before
      declaring	that a disconnect has occurred.	Valid values are 0, 1, and 2.

      Default value: 2 (seconds)







SEE ALSO

  sys_attrs(5)