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sys_attrs_pci(5)					     sys_attrs_pci(5)


  sys_attrs_pci	- pci subsystem	attributes


  This reference page lists and	describes attributes for the PCI (pci) kernel
  subsystem. Refer to the sys_attrs(5) reference page for an introduction to
  the topic of kernel subsystem	attributes.

  For this subsytem, users should modify only the following attribute and do
  so only for the purpose described. Any other visible attributes cannot or
  should not be	modified.

      A	bit-mask setting that allows the developer of PCI hardware and
      softwareto determine the PCI configuration parameters on an Alpha	sys-
      tem based	on the PCI bus.	 By setting PCI_Developer_Debug	to different
      values, a	variety	of hardware-related or software-related	information
      about all	PCI devices on an AlphaServer are printed out at system
      bootstrap	time. If loadable drivers are used, loadable configuration
      data is also printed out on execution of the sysconfig -c	command.

      Refer to the /usr/include/io/dec/pci/pci_debug.h file for	valid bit-
      field settings for this attribute.  The pci_debug.h file contains	macro
      definitions that state the type of information that is printed out if
      PCI_Developer_Debug is set to a particular value.	 Any combination of
      the bit-flags is valid. For example, the value 0x70 allows the hardware
      or software developer to see the PCI configuration header	information
      that the kernel reads or assigns to PCI devices.

      Default value: 0

      Minimum value: 0

      Maximum value: FFFFFFFF(16)



  Writing PCI Bus Device Drivers