1 CS 101 / 101-E Aaron Bloomfield Chapter 1: Hardware

2 What is a computer? Not a rhetorical question! “A device that computes, especially a programmable electronic machine that performs high-speed mathematical or logical operations or that assembles, stores, correlates, or otherwise processes information” –From American Heritage® Dictionary of the English Language, 4 th Edition By definition, a (properly functioning) computer will always produce the SAME output given the same input

3 The first computers Scales – computed relative weight of two items –Computed if the first item’s weight was less than, equal to, or greater than the second item’s weight Abacus – performed mathematical computations –Primarily thought of as Chinese, but also Japanese, Mayan, Russian, and Roman versions –Can do square roots and cube roots

4 Computer Size ENIAC then… ENIAC today…

5 Computer Organization Input Devices Central Processing Unit Memory Output Devices

6 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card

7 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card 3.06 billion operations per second

8 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card 512 million bytes of memory that can be transferred at double the normal rate A byte is 8 bits A bit is a 0 or a 1

9 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card Stores 200 billion bytes of data. You want high RPM and low seek time seconds is average

10 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card 17” on the diagonal. Resolution up to 1,280 by 1,024 pixels

11 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card Microprocessor for displaying images with 64 million bytes of memory. More memory supports more colors and higher resolution

12 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card Reads DVDs 16 times faster than a basic DVD drive. Can hold up to 8 billion bytes of data

13 Computer Organization Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card Can read and write CDs. Can hold 650 million bytes of data Reads at 48 times faster and writes 24 times faster than a basic drive

14 Computer Organization Can send or receive up to 56 thousand bits per second Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card

15 Computer Organization Computer operating system using a graphical interface Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card

16 Computer Organization Can send or receive data at two rates – 10 or 100 million bytes per second Computer advertisement specification –Intel® Pentium 4 Processor at 3.06GHz with 512K cache –512MB DDR SDRAM –200GB ATA-100 Hard Drive (7200 RPM, 9.0 ms seek time) –17” LCD Monitor –64MB NVIDIA GeForce4 MX Graphics Card® –16x Max DVD-ROM Drive –48x/24x/48x CD-RW Drive –56K PCI Telephony Modem –Windows XP Home Edition® –10/100 Fast Ethernet Network Card

17 Home network

18 Backbones

19 Network communication Communication protocol –Set of rules that govern how data is sent and received TCP/IP –Exchanging packets of information over the Internet FTP –Exchanging files between computes SMTP –Exchanging over the Internet POP –Exchanging between mail reader and the ISP HTTP –Exchanging files over the WWW SSL –How information is to be encrypted

20 First Programming Languages Ada Lovelace (1833) –Programmed of Babbage’s analytical engine ENIAC (1945) –Programmed by plugging wires Binary – ) Assembly FORTRAN (1954)

21 Java Lineage C (1972) by Dennis Ritchie C++ (1985) by Bjarne Stroustrup Java (1991) by James Gosling and others at Sun Microsystems