Hwk1

Due Monday, January 22.

1.  Construct a serial binary adder, as described in Hayes, as a
    Chipmunk MODULE.  In a SEPARATE Chipmunk file/page, put in three
    SHIFT registers and miscellaneous logic to test your serial binary
    adder for 4-bit strings.

2.  Construct multiplication hardware for 4-bit strings, producing an
    8-bit product, using the carry-save adder approach outlined in 
    Hayes.  Use two CSA components.  Again, do all this modularly,
    onstructing CSA, the multiplier and the testing logic in three
    separate Chipmunk modules.  Make the CSA's wide enough (including
    a carry-out bit) for the purposes here.  Note:  In computing S, 
    note that Si = xi xor yi xor zi.