Define the jobs performed by the BIU and EU in the 8086.

Define the jobs performed by the BIU and EU in the 8086.

The functions performed by the Bus interface unit are:

- The BIU is responsible for the external bus operations.

- It performs fetching, reading, writing for memory as well as I/O of data for peripheral devices.

- The BIU also performs address generation and the population of the instruction queue.

The Execution unit is responsible for the following work:

- The instructions are decoded and executed by it.

- The EU accepts instructions from the instruction queue and from the general purpose registers it takes data.

- It has no relation with the system buses.