Which of the following intel 8085 signals is responsible for determining when to multiplex address and data busesQuestion 6Select one:a.HOLDb.HLDAc.ALEd.READY

Step 1: Break Down the Problem

We need to identify which signal in the Intel 8085 microprocessor is responsible for determining when to multiplex the address and data buses. The options are:

1. HOLD
2. HLDA
3. ALE
4. READY

Step 2: Relevant Concepts

The Intel 8085 microprocessor uses multiplexed address and data buses to save pin count. The relevant signal for controlling this multiplexing is the Address Latch Enable (ALE) signal. When ALE is high, the address bus is active; when it goes low, the data bus is used.

Step 3: Analysis and Detail

1. HOLD: This signal is used to indicate that another device wants to take control of the bus. It does not have a direct role in multiplexing.
2. HLDA: This signal indicates that the microprocessor has relinquished control of the bus. It is used after HOLD is asserted.
3. ALE: This signal is responsible for the actual multiplexing function; it indicates when the bus is carrying address information versus data information.
4. READY: This signal is used to indicate that the microprocessor can proceed with data transfer and does not relate to the multiplexing of the buses.

Step 4: Verify and Summarize

Out of the provided options, ALE is specifically used to control the multiplexing of address and data buses. The other signals, while important to overall bus management, do not serve this particular function.

Final Answer

The correct choice is c. ALE.