Osnove strojne in programske opreme

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Presentation transcript:

Osnove strojne in programske opreme Prevajalska orodja 2005/2006 Špela Vintar spela.vintar@guest.arnes.si

Strojna oprema osebnega računalnika Osnovna zgradba osebnega računalnika: • centralni (sistemski) del • zunanje enote: • osnovni vhodni enoti: tipkovnica, miška • osnovna izhodna enota: monitor • druge zunanje enote

Pomnilniške enote in nosilci magnetni optični kombinirani (magneto-optični) Trdi disk kapaciteta (velikost): tipično do 100 GB povprečni čas dostopa (reda ms) dimenzije: 5,25", 3,5", 2,5", 1,8", 1,3", ... št. bralno-pisalnih glav, št. sledi, ...

Pomnilniške enote in nosilci Diskete ("mehki" disk, floppy disk) dimenzije: (5,25") 3,5", ZIP kapaciteta: (1,2 MB) 1,44 MB, 100 MB, 250 MB Optični nosilci CD-ROM: 650 MB (74 “minut”), 700 MB (80 min) DVD-ROM: do 16 GB Magnetni trakovi (kasete) do nekaj GB Pomnilniški ključ (USB) Spominske kartice

Vhodne enote Tipkovnica Kazalne naprave: miška sledilna kroglica drsna ploščica igralna palica krmilna pika grafična ploščica zaslon, občutljiv na dotik grafični svinčnik  razpoznavanje pisave

Bralnik slike (skener): vrste: ročni, ploski, bobnasti, specializirani (film) optična ločljivost: 200, 400, 600, 1200, ..., 2700, ... dpi (pik na palec)  OCR: optično razpoznavanje znakov Bralnik črtne kode Bralnik znakov, zapisanih z magnetnim črnilom (MICR) Mikrofon, analogni in digitalni odjemniki zvoka  razpoznavanje govora Digitalna kamera ....

Izhodne enote, katerih zapis ni trajen: "Soft Copy" Monitor vmesnik: VGA velikost diagonale: 14, 15, 17, 19, 21 palcev ločljivost: 640480, 800600, 1024768, 12801024, 16001200 barve: monokromatski, 16, 256, 65536, "true color" frekvenca osveževanja: 50 ... 100 /s Prikazovalniki: LCD: na tekoče kristale projektorji panel, elektronska tabla Zvočniki  kodiranje in sinteza govora

Izhodne enote, katerih zapis je trajen: "Hard Copy" Tiskalniki vrstični toplotni matrični brizgalni laserski Risalniki Zapisovalniki nosilcev informacij: zapisovalniki diskov CD in DVD drugi zapisovalniki

Druge vhodno-izhodne enote in vmesniki Fax, modem, vmesnik ISDN Mrežna kartica Vmesniki zaporedni (serijski) vzporedni (paralelni) (Super-)VGA (Video Graphics Adapter) USB (Universal Serial Bus) PCMCIA (PC Card) SCSI (Small Computer System Interface) analogni in digitalni vmesniki za zvok vmesniki za video MIDI (Musical Instruments Digital Interface) ...

Operacijski sistem osnovni program (sklop programov) računalnika predstavlja vez med strojno opremo in uporabnikom Naloge priprava računalnika za delo ob zagonu (boot) komunikacija z uporabnikom (uporabniški vmesnik) izvajanje uporabniških ukazov poganjanje programov dodeljevanje in upravljanje sredstev (virov) računalnika ob delovanju: druga opravila, npr.: nameščanje in evidenca programske opreme, nadziranje in evidenca uporabe računalnika, varnost in zaščita podatkov

Vrste operacijskih sistemov Po številu uporabnikov enouporabniški (DOS, Windows 3.x) večuporabniški (multi-user) hkrati dela en uporabnik (Windows 95, 98, NT, 2000, XP) hkrati dela več uporabnikov (Linux, Unix) Po številu nalog enoopravilni: izvajanje enega programa naenkrat (DOS) večopravilni (multi-tasking): hkrati teče več programov (procesov) (Windows 3.11, 95, 98, NT, 2000, XP; Linux, Unix) Po uporabniškem vmesniku vrstični (ukazni) vmesnik (DOS, Linux) grafični (vizualni) vmesnik (Windows, X-Windows)