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     zyd — ZyDAS ZD1211/ZD1211B USB IEEE 802.11b/g wireless network device


     To compile this driver into the kernel, place the following lines in your kernel
     configuration file:

           device ehci
           device uhci
           device ohci
           device usb
           device zyd
           device wlan
           device wlan_amrr

     Alternatively, to load the driver as a module at boot time, place the following line in



     The zyd driver provides support for wireless network adapters based around the ZyDAS ZD1211
     and ZD1211B USB chips.

     zyd supports station and monitor mode operation.  Only one virtual interface may be
     configured at any time.  For more information on configuring this device, see ifconfig(8).


     The following devices are known to be supported by the zyd driver:

           3COM 3CRUSB10075
           Acer WLAN-G-US1
           Airlink+ AWLL3025
           Airlink 101 AWLL3026
           AOpen 802.11g WL54
           Asus A9T integrated wireless
           Asus WL-159g
           Belkin F5D7050 v.4000
           Billion BiPAC 3011G
           Buffalo WLI-U2-KG54L
           CC&C WL-2203B
           DrayTek Vigor 550
           Edimax EW-7317UG
           Edimax EW-7317LDG
           Fiberline Networks WL-43OU
           iNexQ UR055g
           Linksys WUSBF54G
           Longshine LCS-8131G3
           MSI US54SE
           MyTek MWU-201 USB adapter
           Philips SNU5600
           Planet WL-U356
           Planex GW-US54GZ
           Planex GW-US54GZL
           Planex GW-US54Mini
           Safecom SWMULZ-5400
           Sagem XG 760A
           Sagem XG 76NA
           Sandberg Wireless G54 USB
           Sitecom WL-113
           SMC SMCWUSB-G
           Sweex wireless USB 54 Mbps
           Tekram/Siemens USB adapter
           Telegent TG54USB
           Trendnet TEW-424UB rev A
           Trendnet TEW-429UB
           TwinMOS G240
           Unicorn WL-54G
           US Robotics 5423
           X-Micro XWL-11GUZX
           Yakumo QuickWLAN USB
           Zonet ZEW2501
           ZyXEL ZyAIR G-202
           ZyXEL ZyAIR G-220


     The following example configures zyd0 to join any BSS network using WEP key “0x1deadbeef1”,
     channel 11:

           ifconfig wlan create wlandev zyd0 channel 11 \
               wepmode on wepkey 0x1deadbeef1 weptxkey 1 \
               inet netmask

     Join an existing BSS network, “my_net”:

           ifconfig wlan create wlandev zyd0 \
               netmask 0xffffff00 ssid my_net


     zyd%d: could not load firmware (error=%d)  An error occurred while attempting to upload the
     firmware to the onboard microcontroller unit.

     zyd%d: could not send command (error=%s)  An attempt to send a command to the firmware

     zyd%d: sorry, radio %s is not supported yet  Support for the specified radio chip is not yet
     implemented in the driver.  The device will not attach.

     zyd%d: device version mismatch: 0x%x (only >= 43.30 supported)  Early revisions of the
     ZD1211 chipset are not supported by this driver.  The device will not attach.

     zyd%d: device timeout  A frame dispatched to the hardware for transmission did not complete
     in time.  The driver will reset the hardware.  This should not happen.


     intro(4), netintro(4), usb(4), wlan(4), wlan_amrr(4), wlan_ccmp(4), wlan_tkip(4),
     wlan_wep(4), ifconfig(8), wpa_supplicant(8)


     The original zyd driver was written by Florian Stoehr <>, Damien
     Bergamini <>, and Jonathan Gray <>.


     The zyd driver does not support a lot of the functionality available in the hardware.  More
     work is required to properly support the IBSS and power management features.