Study Section 1.5, Binary Codes.
(a) Represent 187 in BCD code, excess-3 code, 6-3-1-1 code, and 2-out-of-5 code.
(b) Verify that the 6-3-1-1 code is a weighted code. Note that for some decimal digits, two different code combinations could have been used. For example, either 0101 or 0110 could represent 4. In each case the combination with the smaller binary value has been used.
(c) How is the excess-3 code obtained?
(d) How are the ASCII codes for the decimal digits obtained? What is the relation between the ASCII codes for the capital letters and lowercase letters?
(e) Work Problem 1.9.
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