Address Bus

It is a group of wires or lines that are used to transfer the addresses of Memory or I/O devices. It is unidirectional.In Intel 8085 microprocessor, Address bus was of 16 bits. This means that Microprocessor 8085 can transfer maximum 16 bit address which means it can address 65,536 different memory locations. This bus is multiplexed with 8 bit data bus. So the most significant bits (MSB) of address goes through Address bus (A7-A0) and LSB goes through multiplexed data bus (AD0-AD7).