Computer Science & Electrical Engineering: Draw 8085 register based structure microprocessor & define the registers.

Draw 8085 register based structure microprocessor & define the registers.

Accumulator register:

The accumulator register is an 8bit register that is a part of the arithmetic/

Logic unit (ALU):
This register used to store 8-bit data and in performing arithmetic and logical

Draw 8085 register based structure microprocessor & define the registers.

Operations:

Flag register:
The ALU includes five flip-flops that are set or reset according to data conditions in the

accumulator and other registers. There are five different types of data conditions:

1. Zero flag

2. Carry flag

3. Sign flag

4. Parity flag

5. Auxiliary carry flag.

Stack Pointer:
The stack pointer is a 16-bit register used as a memory pointer, it points to a memory

location in read or write memory.

Program Counter:
This 16-bit register is a memory pointer. Memory location has 16-bit address and

that is why this a 16-bit register.