====== How to set country code for madwifi device? ======

you need to add the countrycode in the file /etc/modules.

wrap:/etc# cat modules
  # /etc/modules: kernel modules to load at boot time.
  #
  # This file should contain the names of kernel modules that are
  # to be loaded at boot time, one per line.  Comments begin with
  # a "#", and everything on the line after them are ignored.
  
  # Setting the right countrycode (Germany=276).
  # Don't forget: Turbo only at Countrycode 0
  # Parameter fuer ath_pci:
  # ifname (Prefix anstatt ath...)         | xchanmode:enable/diable (mehr Frequenzen)
  # outdoor:enable/disable (Outdoor-Modus) | countrycode:int (Laendercode)
  ath_pci xchanmode=0 outdoor=1 countrycode=276
  natsemi
  hostap_pci
  wd1100 sysctl_wd_graceful=0 sysctl_wd_timeout=30
  scx200_acb
  i2c-sensor
  lm77

At the next reboot the ath_pci will load with the params above. For test you can try:
  modprobe -r ath_pci
  modprobe ath_pci countrycode=276

A better solution is to change your regdomain to 0x61. You need a tool (ar5k):
http://sourceforge.net/mailarchive/message.php?msg_id=8966525

The effect: All channels available, but no turbo-modes...
Note: countrycode must be 0 after this (permanent - eeprom) modification!

[Jan]

this is no function !! I test it and when wrap rebooting
write on console :

 Loading modules...
    ath_pci
ath_hal: module license 'Proprietary' taints kernel.
ath_hal: 0.9.16.16 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
wlan: 0.8.4.2 (svn 1527)
ath_rate_sample: 1.2 (svn 1527)
ath_pci: 0.9.4.5 (svn 1527)
wifi%d: unable to collect channel list from hal; regdomain likely 96 country code 96
wifi%d: unable to collect channel list from hal; regdomain likely 96 country code 96

and ifconfig after reboot no search any wifi

sorry !!!