Question

1. What Are The Various Registers In 8085?

2. What Are The Various Flags Used In 8085?

3. What Is Stack Pointer?

4. What Is Program Counter?

5. Which Stack Is Used In 8085?

Answer 1

Answer:

1) various registers in 8085:

• Accumulator,
• Temporary Registers(W and Z),
• General Purpose Registers(B,C,D,E,H and L),
• Instruction Register,
• Stack Pointer,
• Program Counter.

2)Various Flags Used in 8085:

• Carry Flag,
• Auxiliary Flag,
• Sign Flag,
• Zero Flag,
• Parity Flag.

3)What is Stack Pointer:

• Stack Pointer is a special purpose 16-bit register and it is used as a memory pointer.
• It holds the address of the stack.
• It is always Incremented or decremented by 2 while performing push and pop operations.

4)What is Program Counter:

• It is also a special purpose 16-bit register.
• It holds the address of the next instructin to be executed.
• This register is used to sequence the execution of the instructions.
• It is incremented by one to point to the next memory location.

​​​​​​​5)Which stack is used in 8085:

• Last-In-First-Out(LIFO) Stack is used in 8085.
• Which means The instruction that gets pushed last into the stack will be popped first from the stack.