Question

Microprocessor 8086 material.

Choose the correct answer.

1-A normal memory write bus cycle of 8086Mp takes _ clock cycles. *
4
5
6
2
3

2-Reading a word from the memory in one memory read cycle is possible if the required memory address is: *
in the stack
odd
even
in the data segment

3-To test bit 0 and bit 4 of (AX) in one step using TEST instruction, the destination and source must be: *
AX, 10h
AX, 12h
AX, AX
AX, 11h
AX, 0Ah
AX, 5h

Answer 1

Answering the first Question i.e 1.

Correct Answer :

4

Reason :

1. In 8086, the write cycle is divided the four cycles of operations to get the write operation done.
2. At first, read the instruction from the memory into the instruction registers.
3. In the next stage, the instruction is decoded in the operation to get where the write operation is needed to be performed,
4. In the third share, the write operation is done on the select part of memory or the output device.
5. In the last stage, the result is stored and committed in memory.