I don't think it is accurate to equate BCD with DIP switch settings. A DIP switch uses a binary equivalent of a decimal number whereas BCD is a concatenation of 4-bit binary equivalients of each digit.
By way of clarification:
83 (base 10) = 0101 0011 in binary (DIP switch setting)
83 (base 10) = 1000 0011 in BCD