Lecture-4 - Hardware and Software Dr Asish Satpathy...

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Hardware and SoftwareDr. Asish SatpathyUCR/SoBALecture-4
1/26/20162Modern Computer
Computer System ComponentsHardwareProcesses data by executing instructionsProvides input and outputControl input, output, and storage componentsSoftwareApplications and system softwareInstructions tell hardware exactly what tasks to perform and in what orderDataFundamental representation of facts and observationsCommunicationsSharing data and processing among different systems1/26/20161-3
Computer HardwareHardware Consists of the Following:Central Processing UnitPrimary StorageSecondary StorageInput TechnologiesOutput TechnologiesCommunication Technologies1/26/20164
Computer Hardware1/26/20165
Computer MemoryThe way computer stores data (binary digits == bits) Data in computers are divided into cells1 cell = 8 bitsA cell is know as byteBytes are grouped into words ( 4 Bytes = one word)Each word is assigned to an address (ordered from lowest to highest – begins from 0 )1/26/20166
Computer Data: Binary Digits (Bits)1/26/20167• Bits are used to represent electronically. A switch can be open or closed. • An open switch represents 0 or “off” and a closed switch represents “1” or “on”.
Important Storage Capacity Terminology1/26/20168
It all starts with a clock1/26/20169
How does a Computer work? 1/26/201610
CPU – A microprocessor1/26/201611
How Does CPU work?
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