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PCITWEAK(1)             FreeBSD General Commands Manual            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
               hexadecimal.  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).

XFree86                          Version 4.7.0                     PCITWEAK(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHORS

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