bayu priyambadha, s.kom. 2 learning outcomes pada akhir pertemuan ini, diharapkan mahasiswa akan...
TRANSCRIPT
CPUBayu Priyambadha, S.Kom
2
Learning OutcomesPada akhir pertemuan ini, diharapkan
mahasiswa akan mampu : menjelaskan apa yg dimaksud dg Central
Processing Unit, komponen-komponennya, dan cara kerjanya
menjelaskan berbagai jenis secondary storage yg ada pada masa kini, dan perkembangannya ke depan
3
Outline Materi
Microchips, Miniaturization, & Mobility The System Unit: The Basics More on the System Unit Secondary Storage Future Developments in Processing &
Storage
4-4
Microchips, Miniaturization & Mobility Vacuum Tubes vs. Transistors
◦ Vacuum tubes were the original logic gates of computers
◦ They looked like light bulbs, were hot, and burned out like them too
◦ The original transistors were 1/100th the size of vacuum tubes (less power, faster, more reliable too)
Transistors vs. Integrated Circuits◦ Compare 1955’s 45 lb “portable” color TV to
today’s 7 oz Casio 2.3 inch color TV◦ One integrated circuit contains thousands of
transistors
4-6
Semiconductor◦A material whose electrical properties are
intermediate between a good conductor and a nonconductor of electricity
◦Perfect substrate to overlay complex circuits on
◦Microchips are made from semiconductors◦Contain millions of microminiature
integrated circuits
Microchips, Miniaturization & Mobility
4-7
Microprocessor◦ The miniaturized circuitry of an entire computer
processor on a single chip◦ Contains the CPU, which processes data
Microcontroller or Embedded Computer◦ A microprocessor that was modified for use in a
machine that isn’t a computer
Microchips, Miniaturization & Mobility
4-8
The System Unit: The Basics
Binary System: the basic unit of computing◦ Uses just two numbers: 0 and 1◦ All data and program instructions in the computer
are represented as binary◦ Bit: each 0 or 1 is a bit◦ Byte: a group of 8 bits◦ Kilobyte: ~1,000 (1,024) bytes◦ Megabyte: ~1 Million (1,048,576) bytes◦ Gigabyte: ~1 Billion (1,073,741,824) bytes◦ Terabyte: ~ 1 Trillion (1,009,511,627,576) bytes◦ Petabyte: ~ 1 quadrillion bytes◦ Exabyte: ~ 1 quintillion bytes
4-9
The System Unit: The Basics Binary coding schemes assign a unique binary
code to each letter◦ EBCDIC
Requires 8 bits per character Used for IBM mainframes
◦ ASCII Requires 7 or 8 bits per character, depending on the
version 8 bit Extended ASCII provides 256 characters Used for PCs, Unix hosts, Macs
◦ Unicode Requires 16 bits per character Handles 65,536 characters
4-10
The System Unit: The Basics Error Checking: Parity Bits
◦ Used in modems & communications to verify correctness
◦ One check bit is added to 7 bit byte◦ The check bit is defined as either odd or even◦ For odd parity, if the data sent is correct, the
parity bit plus the first 7 data bits is an odd number
◦ For even parity, if the data sent is correct, the parity bit plus the first 7 data bits is an even number
4-11
The System Unit: The Basics
Machine Language◦ A binary-type programming language built into
the CPU that is run directly by the computer◦ Each CPU type has its own machine language
Language Translators◦ System programs convert the programming
instructions for you into machine language
4-12
The System Unit: The Basics
4-13
The System Unit: The Basics
The CPU◦ Older CPUs processing speeds are in MegaHertz
1 MHz = 1 Million ticks per second◦ Current CPUs processing speeds are in GigaHertz
1 GHz = 1 Billion ticks per second◦ The faster a CPU runs, the more power it consumes,
and the more heat it generates
4-14
The System Unit: The Basics The CPU Continued
◦Mainframe and minicomputer speed is measured in MIPS MIPS stands for millions of instructions per second Workstations perform at 100 MIPS or more Mainframes perform at 200 – 1,200 MIPS
◦Supercomputer processing speed is measured in flops Flops stands for floating point operations per second IBM’s Blue Gene/L cranks out 70.72 teraflops (tera =
trillion) per second
4-15
More on the System UnitParts of the CPU
Name1. Word size
2. Control unit
3. Arithmetic Logic Unit
4. Registers
5. Buses
Definition
1. The number of bits the processor can process at any one time
2. The part of the CPU that deciphers instructions and carries them out
3. The ALU performs mathematical and logical operations and controls the speed of them
4. High-speed storage areas that temporarily store data during processing
5. Electrical data roadways used to transmit bits within the CPU and between CPU and other motherboard components
4-16
More on the System UnitHow Memory Works
Memory Chip1. RAM
2. ROM
3. CMOS
4. Flash
Explanation1. Random Access Memory chips are volatile and
hold: a. Software instructionsb. Data before & after the CPU processes it
2. Read only memorya. Cannot be written on or erased without
special equipmentb. Are loaded at factory with fixed start-up
instructions3. Complementary Metal Oxide Semiconductor
a. Powered by a batteryb. Contains time, date, calendar, boot
password4. Nonvolatile memory that can be erased and
reprogrammed more than oncea. Doesn’t require a batteryb. Used in newer PCs for BIOS instructions
4-17
More on the System Unit Types of RAM
RAM Types1. DRAM
2. SDRAM
3. SRAM
4. DDR-SDRAM5. SIMM
6. DIMM
Explanation
1. Dynamic RAM must be constantly refreshed by the CPU or it loses its contents
2. Synchronous Dynamic RAM is synchronized by the system clock and is much faster than DRAM
3. Static RAM is faster than DRAM and retains its contents without having to be refreshed by CPU
4. Double-data rate synchronous dynamic RAM5. Single Inline Memory Module has RAM chips on
only one side a. FPM is fast page mode typeb. EDO is extended data output; is faster than FPM
6. Dual Inline Memory Module has chips on both sides
4-18
More on the System Unit Speeding up Processing
The CPU works much faster than RAM◦ So it could sit there waiting for information◦ Cache temporarily stores instructions and data
that the processor uses frequently to speed up processing Level 1 cache is part of the microprocessor
Holds 8 to 256 kB Faster than Level 2 cache
Level 2 cache is SRAM external cache Holds 64 kb to 2 MB
Level 3 cache is on the motherboard Comes on very high-end computers
4-19
More on the System Unit Speeding up Processing
Method1. Interleaving
2. Bursting
3. Pipelining
4. Superscalar Architecture
5. Hyperthreading
Description1. CPU alternates communications
between two or more memory banks2. CPU grabs a block of data from memory
instead of retrieving one piece at a time3. CPU doesn’t wait for one instruction to
complete before fetching its next instruction
4. The computer can execute more than one instruction per clock cycle
5. A technique used in superscalar architecture in which the OS treats the microprocessor as though it is two microprocessors
4-20
More on the System Unit Ports
Port Type1. Serial Port
2. Parallel Port
3. SCSI Port
4. USB Port
Description1. Used to transmit slow data over long
distancesa. Sends data sequentially, one bit at a
timeb. Used to connect keyboard, mouse,
monitors, dial-up modems2. For transmitting fast data over short
distancesa. Transmits 8 bytes simultaneouslyb. Connects printers, external disks,
backups3. Small Computer System Interface
a. Connects up to 7 devices in a daisy chainb. Transmits data 32 bits at a time
4. Universal Serial Bus can theoretically connect up to 127 peripheral devices in a daisy chain
4-21
More on the System Unit USB
Goals◦ Be low-cost◦ Be able to connect lots of devices◦ Be hot swappable
People hate rebooting because it takes time Hot swapping means a device can be
connected/disconnected without rebooting◦ Permit plug and play
Devices are automatically configured when they are installed – no need to download new drivers
4-22
More on the System UnitUSB Continued
Standards◦ USB 1.1 – the original standard◦ USB 2.0 – the current standard for new PCs◦ USB On The Go (OTG) – currently under
development Connectors
◦ A – in USB Type 1.1 and 2.0◦ B – in USB Type 1.1 and 2.0◦ Mini B – in USB Type 2.0◦ Mini A – in USB OTG used for smaller
peripherals like cellphones
4-23
More on the System UnitSpecialized Expansion Ports
Port Type1. FireWire
2. MIDI
3. IrDA
4. Bluetooth
5. Ethernet
Description1. Intended for devices working with lots of data
a. Used for camcorders, DVD players, TVsb. Handles up to 400 megabits per second
2. Musical Instrument Digital Interfacea. Connects musical instrumentsb. Used in creating, recording, editing, performing
music3. Infrared Data Association: Infrared ports used
to make a cableless connection4. Uses short-range radio waves that transmit up
to 30 fta. Connects computers to printers, keyboards,
headsets, even refrigeratorsb. Named after King Harald Bluetooth, son of
Gorm, who united the Norway and Denmark. Ruled 910-940 A.D.
5. The standard for linking all devices in a Local Area Network
4-24
More on the System UnitExpansion Cards
4-25
More on the System Unit Expansion Buses
Bus1. PCI bus
2. AGP Bus
Description1. Peripheral Component Interconnect
a. For high-speed connectionsb. 32 or 64 bits widec. Typically used for sound cards,
modems, high-speed network cards
2. Accelerated Graphics Port1. Twice the speed of PCI bus2. For Video and 3-D graphics cards
4-26
Secondary Storage
Storage Types1. Floppy and Zip disks
2. Hard disks
3. Optical disks4. Magnetic tape
5. Smart Cards6. Flash memory7. Online secondary
storage
Descriptions1. Removable disks.
a. Floppies store 1.44 MBb. Zip disks store 100, 250, or 750 MB
2. Made from thin rigid metal covered with magnetizable substrate. Most disks have 2 or more platters
3. Removable CDs and DVDs 4. Thin plastic tape coated with
magnetizable substance5. Like a credit card, but contains a
microprocessor and memory chips6. Nonvolatile memory – no moving parts7. Lets you store data on an online vendor’s
server
4-27
Secondary StorageFloppies and Zip Disks
Floppies◦ Flat piece of mylar plastic
inside a 3.5” plastic case◦ Store about 1.44 MB◦ Have a write-protect notch◦ Data is recorded in tracks:
concentric recording bands◦ Formatting breaks the
tracks into small wedge-shaped sectors
◦ Read/Write head transfers data between the computer and disk
◦ Floppies DO wear out!
Zip Disks◦ Disks with a high-quality
magnetic coating ◦ Store 100, 250, or 750
MB◦ Require a Zip drive;
won’t work on floppy drives
◦ Used to store larger files than floppies can hold
◦ Zip disks wear out too!
4-28
Secondary StorageHard Disks
Thin, rigid metal, glass, or ceramic platters covered with a substance that allows data to be held in the form of magnetized spots◦ The more platters there are, the higher the drive
capacity ◦ Store data in tracks, sectors, and clusters◦ Formatting creates a file allocation table that maps
files to clusters or inodes Typical file systems are VFAT & NTFS for Windows, HFS and
ext2 for Unix◦ Drive heads ride on .000001” cushion of air, and
can crash!◦ Important data should always be backed up!
4-29
Secondary StorageHard Disks
Hard Disk Types:◦ External Hard Disks – a freestanding disk drive◦ Removable Hard Disk – inserted into a cartridge
drive on the PC Hard Disk Controllers
◦ EIDE – Enhanced Integrated Drive Electronics Supports up to 4 disks at 137 GB per disk Marketed as SATA, Fast ATA, Ultra ATA, ATA-2, ATA/100
◦ SCSI – Faster than EIDE controllers◦ Fibre Channel – used in large servers – faster
and costlier than SCSI
4-30
Secondary StorageOptical Disks
CDs and DVDs are Optical disks Data is written and read using lasers, not
a disk head◦ CD-ROM is Compact Disk Read-Only Memory
CD-R is used for recording only once CD-RW is an erasable optical disk that can both record
and erase data over and over again
◦ DVD is a CD-style disk with extremely high capacity Stores 4.7 or more GB DVD-R is used for recording only once DVD-RW, DVD-RAM, DVD+RW are reusable DVDs
4-31
Secondary StorageMagnetic Tape
Thin plastic tape coated with a substance that can be magnetized◦ Store 200 GB and higher◦ Used in the form of tape cartridges◦ Still popular for large backups because of their
large data capacity◦ But don’t get it near a magnet as that will erase
it!
4-32
Secondary StorageSmart Cards
Resembles a credit card, but contains a microprocessor and memory chips◦ Holds more information than standard magnetic-
strip credit cards; 8 – 40 MB of data◦ UltraCard
Uses a magnetic shim that draws out of the card to be read, then retracts into the drive
Provides 2 GB of storage◦ Contact smart cards
Must be swiped through card readers Can wear out from use
◦ Contactless smart cards Read when held in front of a low-powered laser
4-33
Secondary StorageFlash Memory
Nonvolatile memory with no moving parts◦ But the electronics can wear out◦ Available as
Flash memory cards Insert these into a flash port of a camera, handheld PC,
smartphone Flash memory sticks
A form of flash memory that plugs into a memory stick port
Flash memory drives A finger-sized module of flash memory Plugs into the USB port of most PCs and Macintoshes
4-34
Online Secondary Storage Allows you to use the internet to back up
your data◦ Sign up with a vendor and receive access to
software that allows you to upload your data to that company’s server
◦ Files should be encrypted to maintain security◦ Use only for vital files that require immediate
availability◦ Use tape, removable hard disk cartridges, zip
disks, optical storage or tape for normal backup
4-35
Future Developments in Processing & Storage
Moore’s Law◦ Gordon Moore predicted the number of transistors on
a silicon chip will double every 18 months◦ It has held up since the 1960s!
4-36
Future Developments in Processing & Storage
New Technology
1. M-RAM
2. OUM
3. Nanotechnology
4. Optical Computing
5. DNA Computing6. Quantum
Computing
Description of Processing Technology
1. Magnetic RAM uses miniscule magnets rather than electrical charges
2. Ovonic Multiplied Memory stores bits by generating different levels of low and high resistance on a glossy material
3. Tiny machines work at a molecular level to make nanocircuits
4. Uses lasers and light, not electricity 5. Uses strands of synthetic DNA to store
data6. Based on quantum mechanics and
stores information using particle states
4-37
Future Developments in Processing & Storage
New Technology1. Higher-density
disks
2. Molecular electronics
Description of Storage Technology
1. Magnetic disk drives currently hold 100 GB of dataa. Blank CDs are replacing floppy disks
since they hold 650MB and cost < $1 each
b. DVD disks hold up to 4.7 GB of data currently
c. Perpendicular recording technology allows 25% - 100% more data to be stored on the same disk
2. Polymer memory creates chips that store data on plasticsa. Nonvolatile memoryb. Data is stored based on polymer’s
electrical resistance
TERIMA KASIH