[En-Nut-Discussion] uart1 how to?

[Dan Morphis]

I have an Ethernut 1.3f board and remember reading somewhere that if I 
wire in a db9 connector, I can use two uarts.  Under the comparison 
table on the hardware table, it says for the 1.3G that the second serial 
port can be created/used with an external level shifter and connector.  
I presume this would apply to the 1.3f?

Can anyone provide information/schematics for building the external 
level shifter, and information on where to connect it on the board.

Thanks,
Dan