system bus architecture of 8086
pipelining in 8086
architecture of 8086 microprocessor pdf
difference between bus interface unit and execution unit of 8086
addressing modes of 80868086 microprocessor family
bus interface unit of 8086 microprocessor pdf
features of 8086 microprocessor

Page No. 1. Block Diagram of Intel 8086. The 8086 CPU is divided into two independent functional units: 1. Bus Interface Unit (BIU). 2. Execution Unit (EU). Fig.Microprocessor - 8086 Functional Units - 8086 Microprocessor is divided into two functional units, i.e., EU (Execution Unit) and BIU (Bus Interface Unit). Architecture of 8086 microprocessor: ? As shown in the below figure, the 8086 CPU is divided into two independent functional parts o Bus Interface Unit(BIU). Bus Interface Unit(BIU) and its Components The BIU sends out addresses, fetches instructions from memory reads data from memory or ports and writes data to memory or ports. So it handles all transfers of data and address on the buses for EU. It has main 2 parts instruction queue and segment registers. 2 shows a block diagram of the 8086 internal architecture . It is internally divided into two separate functional units . These are the Bus Interface Unit ( BIU ) and The bus interface unit is responsible for performing all external bus operations. Specifically it has the following functions: Instruction fetch; Instruction queuing The 8086 has two parts, the Bus Interface Unit (BIU) and the Execution Unit instruction has the control unit direct the other function units through a sequence of The 8086 CPU logic has been partitioned into two functional units namely Bus Interface Unit. (BIU) and Execution Unit (EU). ? The major reason for this