8086 MICROPROCESSOR PDF PDF

The bus interface unit fetches the instruction byte while execution unit is executing the operation the pre fetched instruction is saved in a group of a high-speed register and is known as the instruction queue. Instruction queue: The bus interface unit performs its operations in parallel with the execution unit.These registers are used to store a 16-bit data and the starting address of the four memory segments always begin at a memory location with OH as the least significance and for example, it is like 1234OH. The four segment registers are as follows: Segment register: The memory space 1MB of 8086 is segmented into four blocks and each block is specified by a register with the maximum size of 64 KB.Instruction pointer: The abbreviation of the instruction pointer is the IP and it is a 16-bit register that keeps the address of the memory location of the coming instruction to be executed.The bus interface unit consists of three functional parts and they are as below: The bus interface unit exchanges the information with the device outside the microprocessor and fetches the instructions from the memory. Bus interface unit: The bus interface unit is responsible for the transfer of instructions, information, and address to the execution unit through the system bus.The internal architecture of the 8086 microprocessors is divided into two independent functional units and they are as follows: The internal architecture of 8086 Microprocessors: The next four higher order address lines are multiplexed with the status lines. The 16 bit lower order address bus lines are multiplexed with complete 16-bit data lines.It uses 20 line address bus and 16 line data bus.The Intel 8086 microprocessor is the foremost microprocessor introduced in the year of 1978 by the Intel Company and it is a 40 pin IC chip.Minimum mode: The minimum mode is a single processor system.Maximum mode: The maximum mode is a multiprocessor system.There are two operation modes of operations in the 8086 microprocessors and they are as follows:

8086 MICROPROCESSOR PDF PDF

8086 Microprocessors Seminar and PPT with PDF Report

8086 microprocessor pdf