Chapter 4 : Processor Technology And Architecture

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Chapter 4: Processor Technology and Architecture 1) The central processing unit (CPU) performs fetch operations i.e. it fetches the instructions and inputs from the registers or primary storage in order to execute the instructions. 2) During the fetch cycle control unit fetches the instructions from and separate the op code from the operands, stores the operands in registers, and increments a pointer to the next instruction. 3) During the execution cycle, the control unit or the ALU executes the instruction. The ALU executes the instruction for an arithmetic or a logical operation. The control unit executes all other instruction types. 4) Word size is the number of bits a CPU can process simultaneously. Within limits, CPU…show more content…
Multiprocessing provides multiple CPUs for simultaneous execution of different processes or programs. Chapter 5: Data Storage Technology 1) There are various varieties of storage devices that has different functionality in the context of computational needs. These are mainly divided in to primary and secondary storages. 2) The primary storage devices are generally volatile devices such as Random Access memory (RAM), cache memory etc. which cannot hold data for long periods. 3) The secondary storage devices are nonvolatile devices such as hard disks, floppy disks, magnetic tapes etc. which can hold data for long periods. 4) The characteristics that define the storage devices are speed, volatility, access method, portability, cost, and capacity. These characteristics vary between different storage devices. 5) These characteristics leads to a memory hierarchy in which primary storage stands in the position in the hierarchy with faster access speeds and higher costs per bit of storage, and secondary storage tends to be in the lower portion of the hierarchy, with slower access speeds and lower costs. 6) Magnetic storage devices store data by using magnetic charges. A read/write head with magnetic field is used to read/write the magnetic storage medium. 7) The major disadvantage with this magnetic storage is magnetic decay and magnetic leakage whereas the magnetic charge may lose its charge over time and leakage tends to cancel the charge by different data
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