If we want to implement a common bus for a digital system that has 256 registers, each can hold 32-bit word.

If we choose to implement the bus using 3 state buffers and a decoder, how many 3 state buffers are needed for the bus system? What would be the size of the decoder used? How many Control inputs will be connected to each output of the Decoder?

If we choose to implement the bus using MUXes, how many MUXes are needed for the bus system? What is the size of each MUX? How many selection inputs are in each MUX?

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A number of 8 bits R1 = 01110100, show the procedure to set the 2 rightmost bits, clear the third rightmost bit, toggle the two leftmost bits and replace the leftmost 4 bits with 0110.