Intel 8086 (8088) Microprocessor Structure

The architecture of 8086 includes
Arithmetic Logic Unit (ALU)
Flags
General registers
Instruction byte queue
Segment registers
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 separation is to increase the processing speed of the processor The BIU has to interact with memory and input and output devices in fetching the instructions and data required by the EU EU is responsible for executing the instructions of the programs and to carry out the required processing .The Execution Unit (EU) has
Control unit
Instruction decoder
Arithmetic and Logical Unit (ALU)
General registers
Flag register
Pointers
Index registers
The Execution Unit (EU) has
Control unit
Instruction decoder

The Execution Unit (EU) has
Control unit
Instruction decoder
Arithmetic and Logical Unit (ALU)
General registers
Flag register
Pointers
Index registers

Arithmetic and Logical Unit (ALU)
General registers
Flag register
Pointers
Index registers