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Bus transie In general for any bus transfer system: k registers of n bits can be multiplexed to produce an n-line common bus, where: n MUXS are needed (= bit numbers) The size of each MUX is kx1 (= number of registers x 1) w selection lines are needed where, 2w z k Try this: For register R0 to R63 in a 16-bit bus system; what is the MUX size we use? and how many select bits are needed?