PCITWEAK(1)							  PCITWEAK(1)



NAME
       pcitweak - read/write PCI config space

SYNOPSIS
       pcitweak -l
       pcitweak -r PCI-ID [-b|-h] offset
       pcitweak -w PCI-ID [-b|-h] offset value

DESCRIPTION
       Pcitweak	 is a utility that can be used to examine or change registers
       in the PCI configuration space.	On most platforms pcitweak  can	 only
       be run by the root user.

OPTIONS
       -l      Probe the PCI buses and print a line for each detected device.
	       Each line contains  the	bus  location  (bus:device:function),
	       chip  vendor/device,  card  (subsystem) vendor/card, revision,
	       class and header type.  All values printed are in hexadecimal.

       -r PCI-ID
	       Read  the  PCI  configuration space register at offset for the
	       PCI device at bus location PCI-ID.  PCI-ID should be given  in
	       the  form bus:device:function, with each value in hexadecimal.
	       By default, a 32-bit register is read.

       -w PCI-ID
	       Write value to the PCI configuration space register at  offset
	       for  the	 PCI device at bus location PCI-ID.  PCI-ID should be
	       given in the form bus:device:function, with each value in hex-
	       adecimal.  By default, a 32-bit register is written.

       -b      Read or write an 8-bit value (byte).

       -h      Read or write a 16-bit value (halfword).

SEE ALSO
       scanpci(1)

AUTHORS
       David Dawes (dawes@xfree86.org).



X.Org				Version 6.8.2			  PCITWEAK(1)

UNIX/Linux commands referenced on this page:

1. card
2. at
3. write