DOCSLIB.ORG

Using Handheld Data Collectors in Highway Construction for Accounting and Materials Management

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Using Handheld Data Collectors in Highway Construction for Accounting and Materials Management 1111111111111111111111111111111 PB98-103245 Using Handheld Data Collectors in Highway Construction for Accounting and Materials Management By Peter J. Bosscher & Dean A. Yeazel In Cooperation With The Wisconsin Department of Transportation And The Federal Highway Administration February, 1997 UNIVERSITY OF WISCONSIN MADISON Geotechnical Engineering Program Department of Civil & Environmental Engineering University of Wisconsin-Madison Madison, Wisconsin 53706 Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. 4. Title and Subtitle 5. Report Date Using Handheld Data Collectors in Highway Construction for Accounting & February, 1997 Materials Management 6. Performing Organization Code k.....,--,.--c-.,-----------------------------i 8. Performing Organization Report No. 7. Author(s) Peter J. Bosscher & Dean A. Yeazel SPR-0092-45-74 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Department of Civil & Environmental Engineering University of Wisconsin-Madison 11. Contract or Grant No. Madison, WI 53706 12. Sponsoring Agency Name and Address Wisconsin Department of Transportation 4802 Sheboygan Avenue P.O. Box 7965 14. Sponsoring Agency Code I Madison, WI 53707-7965 15. Supplementary Notes Research perfomed in cooperation with WisDOT and FHWA Research Title: Using Handheld Data Collectors in Highway Construction for Accounting & Materials Management WisDOT Contact: Sharon 1. Bremser, P.E. 608-266-0564 16. Abstract The Wisconsin Department of Transportation (WisDOT) mounted a multi-year study beginning in 1994 entitled, "Using Handheld Data Collectors in Highway Construction for Accounting and Materials Management" to determine the feasibility of deploying a new system for collecting pay quantity information on WisDOT construction projects. The first phase of this study was market research to select a software development environment and a pen-based computer hardware platform to deploy. PenRight! Pro 3.6 was selected for the software development environment. Two types of hardware were selected: full-sized tablet PC's and the Casio loomer, a handheld Personal Digital Assistants (PDA). The study was extended in December 1995 to gain additional user feedback and allow time for migration from the loomer to the Apple MessagePad. In all, three software applications were developed. The first provided integration with WisDOT's Item Record Account. The second was written in PenRight! Pro for the loomer, the third was written in the Newton Toolkit for the MessagePad. These applications were field deployed to seven construction projects in the Madison, WI area. During the second year, the staff for one project used both the loomer and the MessagePad to provide contrasted feedback. The testers felt that this system was an asset to their fieldwork. It provided a simpler way of entering many of their field measurements, and reduced the amount of time required to generate contractor payments and final out a project. Cost analyses indicated a timesaving sufficient to pay for the devices and development within one construction season. Based upon the findings of this study, the future use of handheld data collectors in highway construction for accounting and materials management is dependent upon: integration with WisDOT database software, the ability to customize the hardware for use by WisDOT for other applications such as bridge inspection, highway inventory and maintenance, and time sheets, suitability for use by field inspectors (relates to weight, screen visibility, and power requirements), and continued support of hardware platforms by manufacturer. Due to the rapid advances of the handheld computing industry, continued evaluation of applications of these devices is mandatory. 17. Key Words 18. Distribution Statement Construction Management, Pen-based Computers, Casio No Restriction. loomer, Apple MessagePad, Newton OS, Newton This document is available to the public through: Toolkit, PenRight! Pro, Handheld PC National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of Pages 22. Price Unclassified Unclassified Form DOT F 1700.7 (8-72) Reproduction of completed page authonzed This form was eleclronically produced by Eme Federal Forms. inc. Final Report Using Handheld Data Collectors in Highway Construction for Accounting and Materials Management by Peter 1. Bosscher Associate Professor of Civil and Environmental Engineering University of Wisconsin-Madison and Dean Yeazel Graduate Student Civil and Environmental Engineering Report to the Wisconsin Department of Transportation February 27, 1997 This research is funded by the Wisconsin Council on Research of the Wisconsin Department of Transportation and the Federal Highway Administration under Project #SPR-0092-45-74. The contents of this report reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views of the Wisconsin Department of Transportation or the Federal Highway Administration at the time of publication. This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. This report does not constitute a standard, specification, or regulation. The United States Government does not endorse products or manufacturers. Trade and manufacturers' names appear in this report only because they are considered essential to the object of the document. Executive Summary This is the final report and recommendations from the study, "Using Handheld Data Collectors in Highway Construction for Accounting and Materials Management." The purpose of this study was to determine the feasibility of deploying a new system for collecting pay quantity information on WisDOT construction projects. The first phase of this project was market research to select a software development environment and a hardware platform to deploy. PenRight! Pro 3.6 was selected for the software development environment. Two types of hardware were selected: full-sized tablet PC's and the Casio Zoomer, a handheld Personal Digital Assistants (PDA). The study was extended in December, 1995 to gain additional user feedback and allow time for migration from the Zoomer to the Apple MessagePad. In all, three applications were developed. The first provided integration with WisDOT's Item Record Account. The second was written in PenRight! Pro for the Zoomer. the third was written in the Newton Toolkit for the MessagePad. These applications were field deployed to seven construction projects in the Madison area. During the second year, the staff for one project used both the Zoomer and the MessagePad to provide contrasted feedback. The testers felt that this system was an asset to their field work. It provided a simpler way of entering many of their field measurements, and reduced the amount of time required to generate contractor payments and final out a project. Based on their estimation of how much time was saved per entry, it was estimated that about $3,600 per contract could be saved. This would allow for each hardware unit to be paid for in about 6 weeks. Because of this, we recommend implementing such a system. The software written under this study was developed to the point that it was clean enough for testing purposes. Some additional work will be required to deploy it on a widespread basis. Additional work will also be required to integrate it with WisDOT's new field package, FieldManager. We recommend that the system be phased in over a period of two to three construction seasons to ensure that it is 100% ready for the field. In addition to the features originally specified for this study, other applications, such as remote timesheet recording, could be added to further increase the value of the hardware. Based upon the findings of this project, future use of handheld data collectors in highway construction for accounting and materials management is dependent upon: • integration with FieldManager software, • the ability to customize the hardware for use by WisDOT for other applications such as bridge inspection, highway inventory and maintenance, and time sheets, • suitability for use by field inspectors (relates to weight, screen visibility, and power requirements), • continued support of hardware platform by manufacturer, • usability of interface in terms of issues such as handwriting recognition vs. keyboarding and selectable lists. Due to the rapid advances of the handheld computing industry, continued evaluation of applications of these devices is needed. For example, the advent of WinCE demands an evaluation with respect to the issues listed above. Table of Contents INTRODUCTION 1 SUMMARY OF PHASE I REPORT 3 Software Selection Criteria 3 Hardware Selection Criteria......•........•........•.................•.•......•.......•....•.....•..•.........•.•...............•........•.•.•....••..3 Development Environment 4 Hardware Platforms 4 EXTENSION OF STUDy.................................•.................•...............................••.......6 SOFTWARE DEVELOPMENT 7 Field Applications 7 PenRight! Pro 3.6 for DOS 14 Newton Toolkit 16 Advanced Revelation (AREV) interface 18 HARDWARE PLATFORMS 20 Tablet PC's 20 PDA's 21 ANALYSIS 30 Projects Tested 30 User Feedback 31 Cost Analysis 31 RECOMMENDATIONS
Load more

Recommended publications
  • Linux on the Road
    Linux on the Road Linux with Laptops, Notebooks, PDAs, Mobile Phones and Other Portable Devices Werner Heuser <wehe[AT]tuxmobil.org> Linux Mobile Edition Edition Version 3.22 TuxMobil Berlin Copyright © 2000-2011 Werner Heuser 2011-12-12 Revision History Revision 3.22 2011-12-12 Revised by: wh The address of the opensuse-mobile mailing list has been added, a section power management for graphics cards has been added, a short description of Intel's LinuxPowerTop project has been added, all references to Suspend2 have been changed to TuxOnIce, links to OpenSync and Funambol syncronization packages have been added, some notes about SSDs have been added, many URLs have been checked and some minor improvements have been made. Revision 3.21 2005-11-14 Revised by: wh Some more typos have been fixed. Revision 3.20 2005-11-14 Revised by: wh Some typos have been fixed. Revision 3.19 2005-11-14 Revised by: wh A link to keytouch has been added, minor changes have been made. Revision 3.18 2005-10-10 Revised by: wh Some URLs have been updated, spelling has been corrected, minor changes have been made. Revision 3.17.1 2005-09-28 Revised by: sh A technical and a language review have been performed by Sebastian Henschel. Numerous bugs have been fixed and many URLs have been updated. Revision 3.17 2005-08-28 Revised by: wh Some more tools added to external monitor/projector section, link to Zaurus Development with Damn Small Linux added to cross-compile section, some additions about acoustic management for hard disks added, references to X.org added to X11 sections, link to laptop-mode-tools added, some URLs updated, spelling cleaned, minor changes.
    [Show full text]
  • Linux Laptop-HOWTO
    Linux Laptop−HOWTO Linux Laptop−HOWTO Table of Contents Linux Laptop−HOWTO.....................................................................................................................................1 Werner Heuser <[email protected]>...................................................................................................1 1. Preface..................................................................................................................................................1 2. Copyright, Disclaimer and Trademarks...............................................................................................1 3. Which Laptop to Buy?.........................................................................................................................1 4. Laptop Distribution..............................................................................................................................1 5. Installation...........................................................................................................................................2 6. Hardware In Detail...............................................................................................................................2 7. Palmtops, Personal Digital Assistants − PDAs, Handheld PCs − HPCs.............................................2 8. Cellular Phones, Pagers, Calculators, Digital Cameras, Wearable Computing...................................2 9. Accessories..........................................................................................................................................3
    [Show full text]
  • ATC-1425B User Manual
    Table of Contents JUMPER LOCATION DIAGRAM.............................................A CONNECTOR LOCATION DIAGRAM....................................B ...................................................................................................... CHAPTER 1 INTRODUCTION........................................1 1-1 SYSTEM FEATURES...................................................................1 1-2 CHECK LIST OF THE PACKING...............................................2 CHAPTER 2 INSTALLATION.........................................3 2-1 CPU INSTALLATION..................................................................3 2-2 SIM MODULES INSTALLATION..............................................4 2-3 SRAM INSTALLATION...............................................................5 2-4 OTHER JUMPERS SETTING......................................................6 CHAPTER 3 BIOS SETUP..............................................7 APPENDIX A .................................................................14 CHAPTER 1 INTRODUCTION 1-1 SYSTEM FEATURES : Supports all of 5V and 3.3V 486 CPUs, includes AmDX4-100/120, Am5x86-P75, and Cyrix 5x86. : Flexible architecture to support 128/256/512KB Direct mapped cache scheme. : Supports 4 stage power saving: On/Doze/Standby/Suspend. : Supports L1/L2 Write back/Write through cache feature. : Supports 72-pin dual type SIM modules. : Memory configurations from 1MB up to 256MB by using 256KB/ 1MB/4MB/8MB/16MB/32MB/64MB SIM module. : Supports SMI/SMM/PMU/APM power controllers. : Dual IDE connectors
    [Show full text]
  • Communication Theory II
    Microprocessor (COM 9323) Lecture 2: Review on Intel Family Ahmed Elnakib, PhD Assistant Professor, Mansoura University, Egypt Feb 17th, 2016 1 Text Book/References Textbook: 1. The Intel Microprocessors, Architecture, Programming and Interfacing, 8th edition, Barry B. Brey, Prentice Hall, 2009 2. Assembly Language for x86 processors, 6th edition, K. R. Irvine, Prentice Hall, 2011 References: 1. Computer Architecture: A Quantitative Approach, 5th edition, J. Hennessy, D. Patterson, Elsevier, 2012. 2. The 80x86 Family, Design, Programming and Interfacing, 3rd edition, Prentice Hall, 2002 3. The 80x86 IBM PC and Compatible Computers, Assembly Language, Design, and Interfacing, 4th edition, M.A. Mazidi and J.G. Mazidi, Prentice Hall, 2003 2 Lecture Objectives 1. Provide an overview of the various 80X86 and Pentium family members 2. Define the contents of the memory system in the personal computer 3. Convert between binary, decimal, and hexadecimal numbers 4. Differentiate and represent numeric and alphabetic information as integers, floating-point, BCD, and ASCII data 5. Understand basic computer terminology (bit, byte, data, real memory system, protected mode memory system, Windows, DOS, I/O) 3 Brief History of the Computers o1946 The first generation of Computer ENIAC (Electrical and Numerical Integrator and Calculator) was started to be used based on the vacuum tube technology, University of Pennsylvania o1970s entire CPU was put in a single chip. (1971 the first microprocessor of Intel 4004 (4-bit data bus and 2300 transistors and 45 instructions) 4 Brief History of the Computers (cont’d) oLate 1970s Intel 8080/85 appeared with 8-bit data bus and 16-bit address bus and used from traffic light controllers to homemade computers (8085: 246 instruction set, RISC*) o1981 First PC was introduced by IBM with Intel 8088 (CISC**: over 20,000 instructions) microprocessor oMotorola emerged with 6800.
    [Show full text]
  • Linux Hardware Compatibility HOWTO
    Linux Hardware Compatibility HOWTO Steven Pritchard Southern Illinois Linux Users Group [email protected] 3.1.5 Copyright © 2001−2002 by Steven Pritchard Copyright © 1997−1999 by Patrick Reijnen 2002−03−28 This document attempts to list most of the hardware known to be either supported or unsupported under Linux. Linux Hardware Compatibility HOWTO Table of Contents 1. Introduction.....................................................................................................................................................1 1.1. Notes on binary−only drivers...........................................................................................................1 1.2. Notes on commercial drivers............................................................................................................1 1.3. System architectures.........................................................................................................................1 1.4. Related sources of information.........................................................................................................2 1.5. Known problems with this document...............................................................................................2 1.6. New versions of this document.........................................................................................................2 1.7. Feedback and corrections..................................................................................................................3 1.8. Acknowledgments.............................................................................................................................3
    [Show full text]
  • Presentation (PDF)
    The Past and Future of Pen Computing Conrad H. Blickenstorfer, Editor-in-Chief Pen Computing Magazine [email protected] http://www.pencomputing.com Technology has become the international language of progress, of building things rather than destroying them PC Market: Cloudy Future After 20 years of growth, demand leveling off IDC and Dataquest say shipments down first time ever, predict 6% down from 2000 Still 30 million each in Q2 and Q3 2001, but…. – Commodity components make it difficult to make profit – PC prices have come down: – 1981: 4.77MHz PC costs US$4,000 ($7,767 in 2001 money) – 2001: 1.8GHz PC costs US$1,000 Notebook market a bit better Estimate: 26 million units for 2001, same as for 2000 It is clear that PCs and notebooks as we know them represent the past and the present of computing, but not necessarily the future of computing. Many people agree that PDAs and pen tablets or web tablets are a technology with a very promising future. PDA Projections (1) IDC said that Asia Pacific (without Japan) PDA sales were about two million in 2000. Dataquest said there were 2.1 million PDAs sold in Europe in 2000, with Palm and Pocket PC each having a market share of about 40% in Q2/2001. The US PDA market is 7-8 million units this year, and represents 60-70% of worldwide PDA sales right now. Microsoft said in May 2001 that 1.25 million Pocket PCs have sold since the April 2000 introduction. At a August Microsoft conference in Seattle, Washington, Microsoft said that two million Pocket PCs have been sold worldwide.
    [Show full text]
  • Linux Hardware Compatibility HOWTO Linux Hardware Compatibility HOWTO
    Linux Hardware Compatibility HOWTO Linux Hardware Compatibility HOWTO Table of Contents Linux Hardware Compatibility HOWTO........................................................................................................1 Patrick Reijnen, <[email protected] (remove both "antispam.")>..1 1.Introduction...........................................................................................................................................1 2.Computers/Motherboards/BIOS...........................................................................................................1 3.Laptops..................................................................................................................................................1 4.CPU/FPU..............................................................................................................................................1 5.Memory.................................................................................................................................................1 6.Video cards...........................................................................................................................................2 7.Controllers (hard drive).........................................................................................................................2 8.Controllers (hard drive RAID)..............................................................................................................2 9.Controllers (SCSI)................................................................................................................................2
    [Show full text]
  • Linux Laptop-HOWTO
    Linux Laptop−HOWTO Linux Laptop−HOWTO Table of Contents Linux Laptop−HOWTO.....................................................................................................................................1 Werner Heuser <[email protected]>....................................................................................................1 1. Preface..................................................................................................................................................1 2. Copyright, Disclaimer and Trademarks...............................................................................................1 3. Which Laptop to Buy?.........................................................................................................................1 4. Laptop Distribution..............................................................................................................................2 5. Installation...........................................................................................................................................2 6. Hardware In Detail...............................................................................................................................2 7. Palmtops, Personal Digital Assistants − PDAs, Handheld PCs − HPCs.............................................2 8. Cellular Phones, Pagers, Calculators, Digital Cameras, Wearable Computing...................................3 9. Accessories..........................................................................................................................................3
    [Show full text]
  • Linux Hardware Compatibility HOWTO
    Linux Hardware Compatibility HOWTO Steven Pritchard Southern Illinois Linux Users Group / K&S Pritchard Enterprises, Inc. <[email protected]> 3.2.4 Copyright © 2001−2007 Steven Pritchard Copyright © 1997−1999 Patrick Reijnen 2007−05−22 This document attempts to list most of the hardware known to be either supported or unsupported under Linux. Copyright This HOWTO is free documentation; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free software Foundation; either version 2 of the license, or (at your option) any later version. Linux Hardware Compatibility HOWTO Table of Contents 1. Introduction.....................................................................................................................................................1 1.1. Notes on binary−only drivers...........................................................................................................1 1.2. Notes on proprietary drivers.............................................................................................................1 1.3. System architectures.........................................................................................................................1 1.4. Related sources of information.........................................................................................................2 1.5. Known problems with this document...............................................................................................2 1.6. New versions of this document.........................................................................................................2
    [Show full text]
  • CPU History [Tualatin] [Banias] [Dothan] [Yonah (Jonah)] [Conroe] [Allendale] [Yorkfield XE] Intel Created Pentium (From Quad-Core CPU
    2nd Generation 4th Generation 5th Generation 6th Generation 7th Generation 3rd Generation Intel Pentium III-S Intel Pentium-M (Centrino) Intel Pentium-M (Centrino) Intel Core Duo (Viiv) Intel Core 2 Duo (Viiv)/Xeon Intel Core 2 Duo (Viiv) Intel Core 2 Extreme (Viiv) Intel had the first consumer CPU History [Tualatin] [Banias] [Dothan] [Yonah (Jonah)] [Conroe] [Allendale] [Yorkfield XE] Intel created Pentium (from quad-core CPU. x86/CISC Microprocessors Greek penta which means (2001) (2003) (2004) (2006) (2006) (2007) (2007) 1st Generation Intel Pentium II Xeon Intel Pentium III Xeon Centrino is not a CPU; it is Begin Core five) to distinguish the Intel [P6] [Tanner] a mobile Intel CPU paired nomeclature brand from clones. Names (1998) (1999) Intel Celeron with an Intel Wi-Fi adapter. Intel Celeron Intel Core Solo can be copyrighted, product [Tualeron] [Dothan-1024] Intel Xeon LV Intel Celeron Intel Celeron [Yonah] ID's cannot. (2001) (2004) [Sossaman] [Banias-512] [Shelton (Banias-0)] (2006) (2006) Intel Core 2 Duo Intel Core 2 Extreme Intel Celeron Intel 80386 DX Intel 80486 DX Intel Pentium Intel Pentium Pro Intel Pentium II Intel Pentium II Intel Pentium III Intel Pentium III Intel Pentium 4 Intel Pentium 4 (2004) (2004) Intel Pentium 4 Intel Pentium 4 Intel 4004 Intel 8008 Intel 8086 Intel 80286 [Conroe XE] [Conroe-L] [P3] [P4] [P5/P54/P54C] [P6] [Klamath] [Deuschutes] [Katmai] [Coppermine] [Williamette] [Northwood] [Prescott] [Cedar Mill] END-OF-LINE (Centrino Duo) (1971) (1972) (1978) (1982) (2006) (2007) (1985) (1989) (1993) (1995) (1997) (1998) (1999) (1999) (2000) (2002) (2004) (2006) [Merom] (2006) Yonah is Hebrew for Jonah.
    [Show full text]
  • I/O Built-In 486 4DPS PCI LOCAL BUS SYSTEM BOARD
    I/O Built-in 486 4DPS PCI LOCAL BUS SYSTEM BOARD Your User-friendly Guide ! System Board Specification Supports Intel 486SX/DX/DX2/DX4, P24D,P24T, CYRIX DX2/DX4/5X86, AMD486DX/DX2/DX4 and Enhanced AMD 486DX4 CPU. Build in two channel IDE controller ATA mode 4 compatible Enhanced multi-I/O on board-Floppy interface, 2 x 16550 COM port, Enhanced parallel port and Standard game port. 3 x PCI master slots and PCI specification version 2.0 compliance. 3 x ISA 16-bit bus slots. Board size 220mm x 170mm. Document Revision: 3.1 3008964DPS31 Trademark Acknowledgments SiS are registered trademarks of Silicon Integrated System Corporation. Intel, 486DX, 486DX2, and 486DX4 are registered trademarks of Intel Corporation. AMD is a registered trademark of Advanced Micro Devices, Inc. CYRIX are registered trademarks of Cyrix Corporation. IBM, IBM PC, IBM PC/AT and PC-DOS, OS/2 are registered trademarks of International Business Machines Corporation. MS-DOS, WINDOWS are registered trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners. Disclaimer The information contained in this document is subject to change without notice. We shall not be liable for errors contained herein of for incidental consequential damages in connection with the furnishing, performance, or use of this material. TABLE OF CONTENTS TABLE OF CONTENTS CHAPTER 1 1 SYSTEM BOARD OVERVIEW 1 Preface 1 Layout Of System Board 2 Jumper Settings 3 Connector Settings 6 SIMM RAM Support 7 CHAPTER 2 9 AWARD BIOS SETUP 9 Entering Setup 9 Getting Help 10 The Main Menu 10 Standard CMOS Setup Menu 12 BIOS Features Setup Menu 15 Chipset Features Setup Menu 18 Power Management Setup 21 PCI Configuration 23 Load BIOS Defaults 25 Load Setup Defaults 25 Password Setting 25 IDE HDD Auto Detection 25 Save And Exit Setup 25 Exit Without Saving 25 System Board Overview 4DPS CHAPTER 1 SYSTEM BOARD OVERVIEW Preface This User's Manual provides information on how to install and expand your personal computer based on the high performance 486 Chipset system board with on-board power management.
    [Show full text]
  • Seminararbeit Der Pentium Division-Bug
    Seminararbeit Der Pentium Division-Bug Seminar: Beruhm¨ t beruc¨ htigte Softwarefehler Seminarleitung: Dr. Bernhard Beckert Verfasser: Sebastian Knieschewski 08. Januar 2004 Inhaltsverzeichnis 1 Abstrakt 2 2 Intel 3 3 Der Pentium Prozessor 6 3.1 Intel Pentium P5 . 6 3.2 Intel Pentium P54C . 8 4 Der Divisions-Fehler im Pentium Prozessor 9 5 Der SRT-Divisionsalgorithmus 11 6 Workarounds fur¨ den Divisionsfehler 14 7 Reaktionen der Offen¨ tlichkeit und Gesch¨aftspartner 16 8 Intels Konkurrenz 17 8.1 AMD . 17 8.2 Cyrix & andere CPU-Hersteller . 18 9 Intels Konsequenzen 19 9.1 Umtausch . 19 9.2 Offen¨ tlichkeitsarbeit . 19 10 Verifikation 21 11 Schaden 22 12 Fazit 23 13 Literatur 24 1 Kapitel 1 Abstrakt Die folgende Arbeit beschreibt die Entwicklung von Prozessoren, insbesondere der Intel Prozessoren, bis hin zum Pentium Prozessor. Die einzelnen Funkti- onseinheiten des Pentium Prozessors werden grob skizziert. Das besondere Au- genmerk schließlich gilt der Darstellung des im Koprozessor der CPU aufgetre- tenen Divisions-Fehlers, dessen ¨offentlicher Entdeckung sowie der Erl¨auterung dessen technischer Ursachen und wirtschaftlicher Folgen. Der Ursprung des Feh- lers liegt in einer unvollst¨andig ub¨ ertragenen Divisionstabelle, auf die der SRT- Divisionsalgorithmus zuruc¨ kgreift, und die dem Koprozessor falsche Werte zur Berechnung liefert. Der Divisions-Fehler im Pentium war die bisher gr¨oßte von der Offen¨ tlichkeit erzwungene Ruc¨ krufaktion. 2 Kapitel 2 Intel Die Intel Corporation wurde 1968 von Robert Noyce und Gordon Moore ge- grundet.¨ Der Schwerpunkt der Entwicklung und Produktion lag bei Halbleiter- Speichersystemen. Im November 1971 brachte Intel seinen ersten Mikroprozes- sor auf den Markt, den 4004i.1 Er besaß 2.300 Transistoren und hatte einen 4 Bit breiten Datenbus und einen 12 Bit breiten Adressbus mit dem insgesamt 4 KByte Speicher adressiert werden konnte.
    [Show full text]