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2 - Hardware - 2.1Typesofcomputers /microcomputers...

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Session 2 Comp hardware 2.1 Types of computers Designed to meet personal info processing needs / microcomputers PDA and handheld   (Palm, HP-Compaq), Tablet PC PDA: personal digital assistant $100 - $500 Uses Palm OS Laptop / Notebook computer   (Toshiba, Fujitsu) $1000 + Windows – designed to run with  Intel & Intel compatible  microprocessors Desktop computer   (IBM, HP-Compaq) $500 - $1000+ most desktops run Windows OS For companies Workstations   (Sun, Silicon Graphics) Usually for SME Used in engineering, graphics  design, DNA sequencing Uses Comp Aided Design and CA manufacturing Minicomps / mainframes   (IBM), Uses Unix OS For big companies Used for high transaction  volumes 1 trillion transaction/sec Handles req of <100 ppl  simultaneously Supercomputers  (Cray, NEC, Fujitsu) NASA, work in zub-zero env For multiple ppl to work and  access comp at same time Used mostly for scientific  computing 2.2 Inside Desktop Comps 1.Systm Unit – the case or box in which the motherboard & storage units are housed 2.Casing – dif shapes: desktop cases, tower cases, notebook cases 3.Electrical systm 4.Motherboard – Largest and most impt circuit board Contains CPU whr most processing takes place All devices communicate with motherboard – either installed directly on it or linked by a cable  connected to a port (peripheral devices) Components  Processing: CPU and chip set that supts the CPU Temporary Storage: RAM and cache memory Communication: traces, expansion slots and systm clock
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Electrical systm: Power ss connections to provide electricity to motherboard & expansion cards Programming and setup data: Flash ROM, CMOS setup chip that holds configuration data 5.CPU – Chip that carries out instructns it rcvs frm your software Analogous to function of brain – kps everything function as its supposed to  chipset : microchips on motherboard ctrl the flow of data and instructns to and frm the CPU processors : Most processor today are contained on microprocessor chips made of silicon eg Intel, AMD, Motorola, Sun processor design : * Software (OS) has to be developed separately for each type of processor design CISC – complex instructn set computing Instructn set used by CPUs that has a large number of instructns (200) Most popular processors for PCs designed by Intel are CISC designs RISC – Reduced instructn set computing Supts only the most freq used instructns, allowing CPU to process much faster Workstations tt rq advance graphic capabilities (by Sun & HP) use a RISC processor
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