Pdf multiple choice questions on 8086 microprocessor. Another register specifies the lower 16 bits of the address. View and download intel 8086 specification sheet online. There are two types of registers in register set of 8086 microprocessor,they are 1general purpose registers and 2special purpose registers. Eu contains control circuitry, instruction decoder, alu. Intel 16bit hmos microprocessor specification sheet. Description of general data registers,segment registers and pointers and index registers of intel 8086 microprocessor and brief introduction of flags. Register in computer architecture, a proessor register is a small. The use of these segment registers will be more apparent in memory segmentation schemes. Introduction of registers of 8086 microprocessor youtube. Memory segmentation in 8086 microprocessor geeksforgeeks.
Each segment provides 6 4kb of memory, this area of. Operating system processor, 8086 datasheet, 8086 circuit, 8086 data sheet. The four segment registers actually contain the upper 16 bits of the starting addresses of the four memory segments of 64 kb each with which the 8086 is working at that instant of time. Intel, alldatasheet, datasheet, datasheet search site for electronic components and. If the stack is empty the stack pointer will be fffeh. Protected mode still makes use of the segment registers, but instead of providing a piece of the. Intel released the 8086 microprocessor which was mainly an extension to the origi.
The 8086 also called iapx 86 is a 16bit microprocessor chip designed by intel between early. There are also three 16bit segment registers see figure that allow the 8086 cpu to. There are 8 general purpose registers in 8086 microprocessor. All addresses are with reference to the segment registers. The intel 8086 high performance 16bit cpu is available in three clock rates. A segment register specifies the upper 16 bits of the address. A trieble and avatar singh usin a 64kb ram devices design a memory interface to the 8086 microprocessor to be 1mb 8086 registers of 8086 assembly 8086 registers in 8086 the 8086 book. Eight of the registers are known as general purpose registers i. February 10, 2003 intel 8086 architecture 10 segments in the original 8086 registers are only 16bits wide, and two registers are needed to produce a 20bit memory address. Generally, an ebook can be downloaded in five minutes or less. The 8086 has a segmented memory, the segment registers are used to manipulate memory within these segments. General purpose registers are used to store temporary data within the microprocessor. How many types of registers are there in 8086 allinterview.