Flashed my Arcadyan based router with an inappropriate firmware by accident.

Did manage to activate UART mode and can now load u-boot into RAM and get it started, but that's where I get stuck....

Have a backup of the original firmware but I can find no info on how to get the original stuff back into flash.

Have been examining some of the u-boot commands but couldn't find a solution.

If you have used u-boot to reinstall into flash memory, please give me a clue...

Thanx in advance