Programming model of 8085 microprocessor


Question 1: Describe the functions of ALE and IO/M signals of the microprocessor 8085.

Question 2: List all the sequence of events which takes place when the 8085 MPU reads from the memory.

Question 3: If 8085 adds 87H and 79H, specify the contents of the accumulator and the status of S, Z, and CY flags.

Question 4: If the clock frequency is 5 MHz, how much time is needed to execute an instruction of 18 T-states?

Question 5: Describe the programming model of 8085 µP with the help of appropriate diagram.

Question 6: Draw and describe the timing diagram for the opcode fetch operation.

Question 7: Describe various kinds of addressing modes of microprocessor 8085.

Question 8: Describe why the number of output ports in the peripheral-mapped Input-Output is restricted to 256 ports.

Question 9: In the peripheral-mapped Input-Output, can an input and an output port have the similar port address? Describe.

Question 10: What are the control signals essential in the memory-mapped I/O?

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Computer Engineering: Programming model of 8085 microprocessor
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