In a medium bowl toss cheeses with the flour until evenly mixed.
In a 2-quart saucepan, heat wine over medium high heat until very hot but NOT boiling.
Reduce heat to medium low. Add one handful of the cheese mixture to the wine; stir constantly and vigorously until the cheese melts and the mixture is thick and smooth. Repeat with remaining cheese mixture.
Stir in pepper.
Serve immediately or in a heated fondue pot with your favorite bread and / or vegetables.