Question

what is retyuok?..,.,.,.,.,.,.................

Answer 1

1. ALU

The ALU performs the actual numerical and logic operation such as ‘add’, ‘subtract’, ‘AND’, ‘OR’ etc.

Uses data from memory and from Accumulator to perform arithmetic operation and always stores result of operation in Accumulator.

The ALU consists of accumulator, flag register and temporary register.

   a. Accumulator

The accumulator is an 8-bit register that is a part of arithmetic/logic unit (ALU). This register is used to store 8-bit data and to perform arithmetic and logical operations. The result of an operation is stored in the accumulator.

The accumulator is also identified as register A.

   b. Flag register

8085 has 8-bit flag register. There are only 5 active flags.

S

Z

AC