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 hexa-
               decimal.  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 Version 11                   xorg-server 1.2.0                   PCITWEAK(1)