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13 Cards in this Set
- Front
- Back
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5 General Responsibilities of the Operating System (Names) |
Processor Management; Memory and Storage Management; Device Management; Application Interface; User Interface |
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Processor Management (OS) |
ensures each process and applicatin receives enough of the processor's time to function properly; scheduling the work |
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Memory and Storage Management (OS) |
asks the operating system for memory; cache holds what you do or access the most often |
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Device Management (OS) |
operating system manages device communication; allows new functions to be added to the driver and the hardware subsystems without the operating sysem iteself needing to be modified |
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Application Interface (OS) |
set of commands, functions, and protocols which programmers can use when building software for a specific operating system |
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User Interface (OS) |
makes it easier to learn the device; brings structure to the interaction between a user and the computer; proides the user with access to the capabilitiesof the operating system; uniformity; the means in which a person controls a software application or hardware device |
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Interface |
a boundary or border between 2 systems; user interface - user interacts with the computer; API - applicatons interact with the OS; device drive interfaces - OS interacts wth the device driver software that controls hardware peripherals |
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Importance of the use of standard interfaces |
hides complexity (abstraction) adn allows one part to change without affecting other parts |
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Booting a PC |
1) BIOS holds the first program that runs when the computer is powered on 2) BIOS runs POST 3)BIOS runs bootstrap loader program from boot sector and runs it 4) bootstrap loader starts up the OS |
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Relays |
mechanica switches controlled by electromagnets; reliable, cheap, little power used, slow |
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Vacuum Tubes |
electronic devies that can be used to switch electrical currents on and off; fast, use lots of energy, generate lots of heat - can burn ou, unreliable |
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Transistors |
a semiconductor component that serves as switches in digital circuits; cheaper, smaller,less power, more reliable than vacuum tubes |
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Services a Bus Carries |
address (location of the memory); data; signaling (read/write); clock (sets the pace and keeps the chips in sync); electrical power |
