Unit 2A: Hardware, The CPU & Storage Flashcards
Circuit
closed pathway which conducts electricity
Vacuum Tubes
use circuits to facilitate flow of electrons (replaced by transistor)
Transistor
switch that can be flipped millions of times per second, part of integrated circuit
Integrated Circuit
all parts of circuit on silicon chip
Microchip
stores and processes data
Microprocessor
miniaturized circuitry of CPU
System Unit
case that contains computer’s components
Binary System
computer language 0s and 1s
Measuring Capacity
Bit
Byte
Kilobyte
Megabyte
Gigabyte
Terabyte
Petabyte
Exabyte
ASCII
7-8 bits per character, 256 characters
Unicode
16 bits per character
EBCDIC
8 bits per character
Bay
opening used for installation of electrical equipment
Power Supply
converts AC to DC to run computer
Surge Protector
protects computer from power spikes
UPS
Uninterruptible Power Supply
Motherboard
main system board
Chipset
interconnected chips on motherboard
Multicore Processor
more cores means more speed
2 Parts of CPU
1) Control Unit
2) Arithmetic/Logic Unit (ALU)
2 Types of Memory
Primary - main memory, RAM, volatile
Secondary - flashdrives, etc.. non volatile
RAM
Random Access Memory, volatile, holds software instructions
ROM
Read-Only Memory - non-volatile, fixed instructions on how to load operating system
CMOS
powered by battery, contains time, date and boot password
Flash
nonvolatile, used in newer PCs
Cache
speeds up processing, seeing as CPU is faster than RAM and must wait for information
Level 1 Cache
part of microprocessor, faster than Level 2
Level 2 Cache
external
Level 3 Cache
part of motherboard on very high-end computers
Buses
data roadways that transmit bits between CPU and other motherboard components
Frontside Bus
connects CPU within itself and main memory
Expansion Bus
connects CPU with expansion slots
Firewire
similar to USB but for special use
RAID
way of storing same data in multiple hard drives or SSD to protect data
Used to connect PC graphics cards, sound cards, modems and high speed network cards
PCI bus
PCI Express
doubles speed of PCI
Transfers data via infrared light
IrDA
MIDI
Musical Instrument Data Interface
eSATA
hard disk with fast transmission
Serial Port
transmits data slowly, 1 bit at a time
Parallel Port
transmits data quickly, 8 bits at a time
What does it mean when a disk has more platters?
more memory
Nanotech
Create nano circuits
Optical Computing
Lasers & light, no electricity
DNA Computing
DNA to store data
Quantum Computing
uses particle states
Better Batteries
wireless charging
Higher Density Discs
perpendicular
Molecular Electronics
subatomic level
Optical Discs
CDs & DVDs
What has more data, CD or DVD?
DVD
Types of CDs
- CD-ROM: compact disc ROM
- CD-R: compact disc reusable - once
- CD-RW: compact disc rewritable - multiple times
Types of DVDs
- DVD: Disc w/ high capacity
- DVD-R: recordable only once
- DVD-RW, DVD-RAM, DVD+RM: reusable
- Blu-ray: record & play HD video
Control Unit
deciphers instructions in CPU and carries it out
Machine Cycle
4 Operations
1. Fetch
2. Decode
3. Execute
4. Store
ALU
Arithmetic and Logical Operations control speed of these operations
Arithmetic Operations
fundamental math (multiplication, division, etc.)
Logical Operations
Comparison of 2 pieces of data ( >, <, =)