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Case study of 8086 microprocessor

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A Microprocessor is an Integrated Circuit with all the functions of a CPU however, it cannot be used stand alone since unlike a microcontroller it has no memory or peripherals. However, it has internal registers for storing intermediate and final results and interfaces with memory located outside it through the System Bus. The size of the internal registers present within the chip indicate how much information the processor can operate on at a time in this case bit registers and how it moves data around internally within the chip, sometimes also referred to as the internal data bus. Memory segmentation: To increase execution speed and fetching speed, segments the memory. These are explained as following below. BIU performs the following functions- It generates the 20 bit physical address for memory access.

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Krishna Kant has wide experience in designing and implementing microprocessor-based, real-time systems for different applications. He also imparted training to agriculture scientists on microprocessor applications. He has authored five books. Account Options Sign in.

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The [2] also called iAPX 86 [3] is a bit microprocessor chip designed by Intel between early and June 8, , when it was released. The Intel , released July 1, , [4] is a slightly modified chip with an external 8-bit data bus allowing the use of cheaper and fewer supporting ICs , [note 1] and is notable as the processor used in the original IBM PC design. The gave rise to the x86 architecture , which eventually became Intel's most successful line of processors. In , Intel launched the , the first 8-bit microprocessor. The device needed several additional ICs to produce a functional computer, in part due to it being packaged in a small pin "memory package", which ruled out the use of a separate address bus Intel was primarily a DRAM manufacturer at the time.
A procedure is a set of code that can be branched to and returned from in such a way that the code is as if it were inserted at the point from which it is branched to. The branch to procedure is referred to as the call, and the corresponding branch back is known as the return. The return is always made to the instruction immediately following the call regardless of where the call is located. The CALL instruction not only branches to the indicated address, but also pushes the return address onto the stack.
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