How to put a C7-626 OP into transfer mode?

I need to load to a C7-626 OP and wondered how to put it into serial transfer mode. I know that usually you can press a couple of keys during boot up and it'll go straight into transfer mode. Any idea what those keys are on a C7-626 ?

Many thanks

JT ;-)

During bootup hold <ESC> and the up arrow to go into serial transfer mode. Holding <ESC>, right arrow and down arrow will erase the memory (restore to factory settings).

Cheers Rob, much obliged mate.