These are the supported VxWorks firmware versions for conversion to Cisco IOS firmware:
The upgrade must be performed through the wired connection to the AP. Additionally, the station from which the upgrade is performed must be on the same Ethernet segment as the AP.
Note: To run the upgrade process successfully, the AP must have at least 4 MB of DRAM available. Otherwise the upgrade fails. Issue the :vxdiag_memshow VxWorks command at the console prompt, or at a Telnet session, to display the amount of free DRAM.
Note: If the upgrade process from VxWorks to Cisco IOS fails, the AP must be recovered. For more information on this process, refer to the Recover from a Failure section of Upgrade Cisco Aironet AP1200 to IOS.