RB500 BIOS upgrade

If there is a problem with booting RouterOS ("starting services ..."), or any other booting problem with the RouterBOARD500, try to upgrade the RouterBOARD firmware with this file:

http://www.routerboard.com/files/rb-2.9/rc32434-2.9.fwf

this can be done from the BIOS of RouterBOARD500 with Hyperterminal `send file` feature. More info in the RB manual:

http://routerboard.com/pdf/rb500ugM.pdf