1-1 Chapter 1 - Introduction

Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Computer Architecture andOrganization

Miles Murdocca and Vincent Heuring

Chapter 1 – Introduction

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Chapter Contents1.1 A Brief History of Computing1.2 The Von Neumann Model1.3 The System Bus Model1.4 Levels of Machines1.5 A Typical Computer System1.7 Organization of the Book1.8 Case Study: What Happened to Supercomputers?

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Some Definitions

• Computer architecture deals with the functional behavior of acomputer system as viewed by a programmer (like the size ofa data type – 32 bits to an integer).

• Computer organization deals with structural relationships thatare not visible to the programmer (like clock frequency or thesize of the physical memory).

• There is a concept of levels in computer architecture. Thebasic idea is that there are many levels at which a computercan be considered, from the highest level, where the user isrunning programs, to the lowest level, consisting oftransistors and wires.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Wolf Radius Bone• Wolf radius bone ca. 25,000–30,000 B.C. showing 55 cuts in

groups of five, suggesting a rudimentary form of multiplicationor division.

(Source: Illustrated London News, October 2, 1937.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Tally Sticks• Original wooden tally

sticks fromWestminster, England,ca. 1250–1275 A.D.

(© SSPL/TheImageWorks.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Chinese Abacus• Representation of 39,017 on a Chinese abacus.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Cylinder Music Box• Victorian Swiss cylinder music box, dated 1862.

(Source: http://www.liveauctioneers.com/auctions/ebay/497199.html.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Pascal’s Calculating Machine• Performs basic arithmetic operations (early to mid 1600’s). Does

not have what may be considered the basic parts of a computer.

(Source: IBMArchivesphotograph.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Babbage’s Difference Engine #1• Working portion of Babbage’s Difference Engine No. 1, which is

the first known automatic calculator.

(© SSPL/The ImageWorks.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

The Jacquard Pattern Weaving Loom

• The Jacquard patternweaving loom (ca.1804).

(Source: The DeutschesMuseum.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Enigma• Siemens Halkse T-52 Sturgeon (Enigma) cipher machine.

(Photo and copy courtesy John Alexander, G7GCK Leicester, England.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Colossus• The Colossus (ca. 1944).

(Source: http://www.turing.org.uk/turing/scrapbook/electronic.html.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

The ENIAC

(Time & Life Pictures/Getty Images.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Moore’s Law• Computing power doubles every 18 months, for the same price.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

UltraSPARC IV+ Layout• Die photo of UltraSPARC IV+, 295 million transistors, 19.7 mm ×

17.0 mm.

(Source: “Best Servers of 2004”, Kevin Krewell, 1/18/05, Microprocessor,www.MPRonline.com, Reed Electronics Group, ref: h10018.www1.hp.com/.)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

The von Neumann Model• The von Neumann model consists of five major components:

(1) input unit; (2) output unit; (3) arithmetic logic unit; (4)memory unit; (5) control unit.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

The System Bus Model• A refinement of the von Neumann model, the system bus model

has a CPU (ALU and control), memory, and an input/output unit.

• Communication among components is handled by a sharedpathway called the system bus, which is made up of the databus, the address bus, and the control bus. There is also a powerbus, and some architectures may also have a separate I/O bus.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Levels of Machines• There are a number of levels in a computer, from the user leveldown to the transistor level.

• Progressing from the top level downward, the levels become lessabstract as more of the internal structure of the computer becomesvisible.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

A TypicalComputer

System

(Computer case source http://www.baber.com/cases/mpe_md14_silver.htm.Motherboard source ftp://ftp.tyan.com/img_mobo/i_s2895.tif)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

The Motherboard

Source: Courtesy Tyan Computer Corp. (USA).

• An AMD Opteron 200 based motherboard.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

End-to-End Network

Source: MSGScott Bramwell.

• End-to-end communication over a network. Highlighted architecturalcomponents include computers, hubs, switches, routers, firewalls,multiplexers, andphone switches.

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Manchester University Mark 1 / Baby• The Manchester University Mark 1, showing the Manchester Baby

portion which was made operational on 21 June 1948.

(Source: The University of Manchester, www.computer50.org/mark1/ip-mm1.mark1.html)

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Computer Architecture and Organization by M. Murdocca and V. Heuring © 2007 M. Murdocca and V. Heuring

Moore’s Law Restated

• Computing power doubles every 18 months for the sameprice.

• Project planning needs to take this observation seriously:an architectural innovation that is being developed for aprojected benefit that quadruples performance in threeyears may no longer be relevant: the architectures thatexist by then may already offer quadrupled performanceand may look entirely different from what the innovationneeds to be effective.