Question

Microprocessor based system, the stack is always in

Answer 1

Answer:

Explanation:

The first Machine Cycle, pretty much, decides the flow of whole instruction. In 8085, if the instruction is MVI D, 85H, then the first Machine cycle always tells the processor to look for an instruction. Always. Since, the instruction is MVI, microprocessor will look for an 8-bit data for the next cycle. If you forgot writing the data to be written, and instead wrote another instruction, like 3E (which is for MVI A) intended to work as is mentioned in the parentheses, processor won’t get that.

Instead it will put 3E in register D. After taking 3E, the instruction is complete. So, 8085 will again look for a new instruction and not a data.