Thanks, understand what you are saying, and it's easy to do, but, why 
the work around. PORTB is only an address of a register, and I haven't 
seen anything that says "variable = register" is required. If that's the 
case, then all registers must also be read to a variable to ensure 
correct operation. ~)

Barry Gershenfeld wrote:
> Nothing can beat reading PORTB into a variable and examining it.  It
> certainly beats "assuming" :)
>   
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