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Bit-slices clearly visible Difference between and No Description 1 Address lines 20 24 2 No. The second generation of x86 bit processors, Intel , was released in The major new feature of the microprocessor was protected mode.
Both and are two major microprocessors designed by Intel. However, the crucial difference between and microprocessor is that an microprocessor is an 8-bit microprocessor i. As against is a bit microprocessor, that can perform operation on bit data in one cycle. There exist various other factors that create significant differences between and microprocessor. In this section, we will discuss the other differences between and microprocessor using a comparison chart. Basically, it is called so because the ALU size is of 8-bit.
It offers a data bus size of 8-bit with an address bus of bit. Thus the permissible accessible memory space is 64KB. More specifically we can say that as one data byte is stored in one memory location, therefore overall 64 kilobytes of data can be stored by microprocessor. The arithmetic and logic unit of microprocessor is able to perform operations like add, subtract, compare, complement, increment, decrement, shift, AND, OR, X-OR.
It is an accumulator based processor. This means that the data during operation reside in the accumulator and temporary registers. Also, the output of the operation is stored in the accumulator and in accordance with the outcome generated, the flags get set and reset. It performs program execution in 3 stages, which are fetching , decoding and executing. Firstly, fetching of instruction from the memory is done and then is stored in the instruction register.
After that, the instruction is decoded by the decoder and the respective control signal is produced by the timing and control unit. According to the signal received the ALU performs the desired operation and stores the result in the accumulator and accordingly sets the flag register.
The reason behind it being a bit microprocessor is the size of its ALU. The data bus size in case of microprocessor is bit and that of the address bus is bit. The instruction in the EU translates the instruction fetched from the memory into a series of action carried out by the EU. The ALU is a fundamental building block of the central processing unit of a computer, and even the simplest microprocessors contain one for purposes such as maintaining timers.
Flags The bit flag register of the processors stores the information about the status of the processors and the status of the instruction executed most recently. General Purpose Register These register can be used for temporary storage of 8-bit data. Certain pairs of those GPR can be used together to store bit data words. Pointer Registers The pointer registers are usually used for storing the offset address of data elements stored in stack.
The processor has two bit pointer register. Index Register The processor has two bit index register. The index register are used for storing index or offset of the array elements from the memory.
Conclusion Unlike microcontrollers, microprocessors do not have inbuilt memory. Finally we can say microprocessor set the stage for a computer and worldwide standard that would become the basis for the architecture of every computer made today.
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Explore Audiobooks. Bestsellers Editors' Picks All audiobooks. Explore Magazines. Editors' Picks All magazines. BIU 2. EU Fig: Internal block diagram. In other words, the BIU handles all transfers of data and addresses on the buses for the execution unit. When the command is executed, the CPU carries out the instructions in order by converting them into microcode.
Related Papers. By sreenivasa Rao ijjada. The Micro Processor architecture. Memahami Bahasa Assembly lewat Arsitektur Komputer. By Tan Arman.
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