![]() IP gets a new value whenever a branch instruction occurs.IP is incremented after every instruction byte is fetched.It holds offset of the next instructions in the Code Segment. Maintains the 6-byte pre-fetch instruction queue( supports pipelining).īIU mainly contains the 4 Segment registers, the Instruction Pointer, a pre-fetch queue, and an Address Generation Circuit.It transfers data to and from the memory and I/O.It fetches instructions from the memory.It generates the 20-bit physical address for memory access.to transfer data between memory and I/O devices.īIU performs the following functions are as follows: It performs various machine cycles such as memory read, I/O read, etc. It provides the interface of 8086 to external memory and I/O devices via the System Bus. However, it cannot be used stand-alone since unlike a microcontroller it has no memory or peripherals. The special registers include the flags register, which stores status information about the result of the previous operation, and the instruction pointer (IP), which points to the next instruction to be executed.Ī Microprocessor is an Integrated Circuit with all the functions of a CPU. The general-purpose registers can be used to store data and perform arithmetic and logical operations, while the segment registers are used to address memory segments. ![]() The 8086 microprocessor has a rich set of registers, including general-purpose registers, segment registers, and special registers. The BIU also manages data transfer between the microprocessor and memory or I/O devices. The BIU is responsible for fetching instructions from memory and decoding them, while the EU executes the instructions. The 8086 microprocessor has two main execution units: the execution unit (EU) and the bus interface unit (BIU). Software Engineering Interview Questions.Top 10 System Design Interview Questions and Answers.Top 20 Puzzles Commonly Asked During SDE Interviews.Commonly Asked Data Structure Interview Questions.Top 10 algorithms in Interview Questions.Top 20 Dynamic Programming Interview Questions.Top 20 Hashing Technique based Interview Questions. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |