Which is incorrect in 1-bus SRC? a. MA only receives data from the bus and passe

Question

Which is incorrect in 1-bus SRC? a. MA only receives data from the bus and passes it on to the memory subsystem. b. MD is unidirectional: it sends data to the memory subsystem a "write" and receives data from the memory system upon a "read." c. The 5-bit register, n, stores the shift count, and in this design n is a counter that can be decremented. d. The Cond logic employs the least significant 3 bits of the c3 field in the IR, which specify the condition to be tested in conditional branch instruction, as well as the bus contents to compute whether a given condition is true. e. None of the above

Explanation / Answer

17. Which is incorrect in 1-bus SRC?

a. MA only receives data from the bus and passes it on to the memory subsystem.

b. MD is unidirectional: it sends data to the memory subsystem upon a "write" and receives data from the memory system upon a "read."

c. The 5-bit register, n, stores the shift count, and in this design n is a counter that can be decremented.

d. The Cond logic employs the least significant 3 bits of the c3 field in the IR, which specify the condition to be tested in conditional branch instruction, as well as the bus contents to compute whether a given condition is true.

e. None of the above

Answer: B

In a 1-bus SRC design the Memory data is read from or written into a MD, hence among the given options option B is incorrect.

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