Computers Flashcards
CRT screen
older poor brightness control low resolution uses electron gun Gets hot
LCD screen
newer and more common in aircraft
good brightness control
high resolution
lower energy consumption
RAM
random access memory
can change it
volatile memory- needs power to maintain info
so info entered lost after shut down
ROM
read only memory
cant changed it
non volatile memory - not lost after power lost
2 types of permanent storage?
optical disk
hard disk
Buses
connection between parts of a computer each bus has: address bus- localises data control bus- has control data bus- transfer data to a memory address located by the address bus
parallel bus
transmits data over separate lines at same time
Phase shift bus
power generation and distribution on a large scale
serial bus
sends data 1 piece at a time through a single connection
the OS (operating system) manages…
software and hardware resources
assembly language
low level programming language
strong connection between language and architecture
fast and used for performance execution
high level language
portable across many architectures
Digital vs analogue
digital: on or off signals made by transistors making/ breaking connections
suffers lag
analogue: smooth signals
operate in real time
computer components
CPU:
control unit- deals with time and correcting actions within the computer
arithmetic logic unit
registry
other:
memory
bus
peripherals
computer inputs
keyboard mouse touchpad track ball optical disc
