Alan Milstein's History of Computers
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Spring 2018 Undergraduate Law Journal
SPRING 2018 UNDERGRADUATE LAW JOURNAL The Final Frontier: Evolution of Space Law in a Global Society By: Garett Faulkender and Stephan Schneider Introduction “Space: the final frontier!” These are the famous introductory words spoken by William Shatner on every episode of Star Trek. This science-fiction TV show has gained a cult-following with its premise as a futuristic Space odyssey. Originally released in 1966, many saw the portrayed future filled with Space-travel, inter-planetary commerce and politics, and futuristic technology as merely a dream. However, today we are starting to explore this frontier. “We are entering an exciting era in [S]pace where we expect more advances in the next few decades than throughout human history.”1 Bank of America/Merrill Lynch has predicted that the Space industry will grow to over $2.7 trillion over the next three decades. Its report said, “a new raft of drivers is pushing the ‘Space Age 2.0’”.2 Indeed, this market has seen start-up investments in the range of $16 billion,3 helping fund impressive new companies like Virgin Galactic and SpaceX. There is certainly a market as Virgin Galactic says more than 600 customers have registered for a $250,000 suborbital trip, including Leonardo DiCaprio, Katy Perry, Ashton Kutcher, and physicist Stephen Hawking.4 Although Space-tourism is the exciting face of a future in Space, the Space industry has far more to offer. According to the Satellite Industries 1 Michael Sheetz, The Space Industry Will Be Worth Nearly $3 Trillion in 30 Years, Bank of America Predicts, CNBC, (last updated Oct. -
Technical Details of the Elliott 152 and 153
Appendix 1 Technical Details of the Elliott 152 and 153 Introduction The Elliott 152 computer was part of the Admiralty’s MRS5 (medium range system 5) naval gunnery project, described in Chap. 2. The Elliott 153 computer, also known as the D/F (direction-finding) computer, was built for GCHQ and the Admiralty as described in Chap. 3. The information in this appendix is intended to supplement the overall descriptions of the machines as given in Chaps. 2 and 3. A1.1 The Elliott 152 Work on the MRS5 contract at Borehamwood began in October 1946 and was essen- tially finished in 1950. Novel target-tracking radar was at the heart of the project, the radar being synchronized to the computer’s clock. In his enthusiasm for perfecting the radar technology, John Coales seems to have spent little time on what we would now call an overall systems design. When Harry Carpenter joined the staff of the Computing Division at Borehamwood on 1 January 1949, he recalls that nobody had yet defined the way in which the control program, running on the 152 computer, would interface with guns and radar. Furthermore, nobody yet appeared to be working on the computational algorithms necessary for three-dimensional trajectory predic- tion. As for the guns that the MRS5 system was intended to control, not even the basic ballistics parameters seemed to be known with any accuracy at Borehamwood [1, 2]. A1.1.1 Communication and Data-Rate The physical separation, between radar in the Borehamwood car park and digital computer in the laboratory, necessitated an interconnecting cable of about 150 m in length. -
The Power Manager
HW 24 - Little PowerBook in Slumberland Page: 1 NOTE: This Technical Note has been retired. Please see the Technical Notes page for current documentation. CONTENTS The purpose of this Note is to describe the ramifications of resting, sleeping, and The Power Manager power-saving modes in the PowerBook family of Macintosh computers, how they may References affect your application, and the appropriate Downloadables ways to defeat them, when appropriate. It also describes some nonintuitive ramifications of working with a battery-powered computer. [Oct 01 192] The Power Manager In each PowerBook is a separate processor called the Power Manager. Its function is to monitor and control the power consumption and battery charging of the system. In doing this, it turns on and off various hardware subsystems, changes or stops the CPU's clock speed, watches the battery voltage, and, when charging, sets the bulk charge or trickle charge modes of the battery charging circuit. As you can see, the power draw of the system is a dynamically changing value, depending on which subsystems are currently in use, the speed of the processor, and whether or not charger circuit power is available. The Power Manager is designed to optimize for the maximum battery life and controls the various operating modes in response to user preferences that allow the user to override or push back in time the onset of these modes. The Many Faces of the Power Manager The PowerBook 100 (just like the original portable) has four operating modes: normal, rest, sleep, and shutdown. The PowerBook 140 has four operating modes: normal, rest (power cycling), sleep, and shutdown. -
Historical Perspective and Further Reading 162.E1
2.21 Historical Perspective and Further Reading 162.e1 2.21 Historical Perspective and Further Reading Th is section surveys the history of in struction set architectures over time, and we give a short history of programming languages and compilers. ISAs include accumulator architectures, general-purpose register architectures, stack architectures, and a brief history of ARMv7 and the x86. We also review the controversial subjects of high-level-language computer architectures and reduced instruction set computer architectures. Th e history of programming languages includes Fortran, Lisp, Algol, C, Cobol, Pascal, Simula, Smalltalk, C+ + , and Java, and the history of compilers includes the key milestones and the pioneers who achieved them. Accumulator Architectures Hardware was precious in the earliest stored-program computers. Consequently, computer pioneers could not aff ord the number of registers found in today’s architectures. In fact, these architectures had a single register for arithmetic instructions. Since all operations would accumulate in one register, it was called the accumulator , and this style of instruction set is given the same name. For example, accumulator Archaic EDSAC in 1949 had a single accumulator. term for register. On-line Th e three-operand format of RISC-V suggests that a single register is at least two use of it as a synonym for registers shy of our needs. Having the accumulator as both a source operand and “register” is a fairly reliable indication that the user the destination of the operation fi lls part of the shortfall, but it still leaves us one has been around quite a operand short. Th at fi nal operand is found in memory. -
The Birth, Evolution and Future of Microprocessor
The Birth, Evolution and Future of Microprocessor Swetha Kogatam Computer Science Department San Jose State University San Jose, CA 95192 408-924-1000 [email protected] ABSTRACT timed sequence through the bus system to output devices such as The world's first microprocessor, the 4004, was co-developed by CRT Screens, networks, or printers. In some cases, the terms Busicom, a Japanese manufacturer of calculators, and Intel, a U.S. 'CPU' and 'microprocessor' are used interchangeably to denote the manufacturer of semiconductors. The basic architecture of 4004 same device. was developed in August 1969; a concrete plan for the 4004 The different ways in which microprocessors are categorized are: system was finalized in December 1969; and the first microprocessor was successfully developed in March 1971. a) CISC (Complex Instruction Set Computers) Microprocessors, which became the "technology to open up a new b) RISC (Reduced Instruction Set Computers) era," brought two outstanding impacts, "power of intelligence" and "power of computing". First, microprocessors opened up a new a) VLIW(Very Long Instruction Word Computers) "era of programming" through replacing with software, the b) Super scalar processors hardwired logic based on IC's of the former "era of logic". At the same time, microprocessors allowed young engineers access to "power of computing" for the creative development of personal 2. BIRTH OF THE MICROPROCESSOR computers and computer games, which in turn led to growth in the In 1970, Intel introduced the first dynamic RAM, which increased software industry, and paved the way to the development of high- IC memory by a factor of four. -
John Mccarthy
JOHN MCCARTHY: the uncommon logician of common sense Excerpt from Out of their Minds: the lives and discoveries of 15 great computer scientists by Dennis Shasha and Cathy Lazere, Copernicus Press August 23, 2004 If you want the computer to have general intelligence, the outer structure has to be common sense knowledge and reasoning. — John McCarthy When a five-year old receives a plastic toy car, she soon pushes it and beeps the horn. She realizes that she shouldn’t roll it on the dining room table or bounce it on the floor or land it on her little brother’s head. When she returns from school, she expects to find her car in more or less the same place she last put it, because she put it outside her baby brother’s reach. The reasoning is so simple that any five-year old child can understand it, yet most computers can’t. Part of the computer’s problem has to do with its lack of knowledge about day-to-day social conventions that the five-year old has learned from her parents, such as don’t scratch the furniture and don’t injure little brothers. Another part of the problem has to do with a computer’s inability to reason as we do daily, a type of reasoning that’s foreign to conventional logic and therefore to the thinking of the average computer programmer. Conventional logic uses a form of reasoning known as deduction. Deduction permits us to conclude from statements such as “All unemployed actors are waiters, ” and “ Sebastian is an unemployed actor,” the new statement that “Sebastian is a waiter.” The main virtue of deduction is that it is “sound” — if the premises hold, then so will the conclusions. -
Basic Electronics.COM -- Internet Guide to Electronics
BASIC ELECTRONICS.CD INFO Best Viewed at 800X600 Last Updated: January 10, 2003 Previously Internet Guide to Electronics Site. Welcome! This website allows you to NEW & NEWS: browse the subject of ELECTRONICS. If you are just starting the learning journey, I hope Your Projects you'll make use of the simple nature and graphical content of this site. Feel free to look Basic Electronics around. Don't worry -- there are no tests at the FAQ end of the day. If you would like to contact me regarding this site, email me at [email protected] John Adams - Author ( Place mouse over symbol to see selection in LCD screen then view explanation in the Email Me browser's status window. Non-Javascript browsers, scroll down for link explanations.) THEORY|APPLY IT!|COMPONENTS|MESSAGE BOARD|REF/DATA/TOOLS BOOKS/MAGs|LECTRIC LINKS|BASIC ELECTRONICS.CD INFO ABOUT|EMAIL|WHATS NEW! THEORY Gain the basic understanding of electronic principles that you will be making use of later. This includes Ohm's Law, Circuit Theory, etc. APPLY IT! Putting the theory to work. This includes sections on how to solder, multimeters, and of course, PROJECTS! COMPONENTS Learn about various electronics components. MESSAGE BOARD Post your basic electronics related questions here for others to answer and read. REFERENCE, DATA AND COOL TOOLS! Resistor color code info, plenty of calculators, chart, electronics data and other cool tools! VERY POPULAR PAGE BOOKS/MAGs A list of books and magazines relating to the subject of electronics. Includes direct links to amazon.com for ordering online. LECTRIC LINKS A list of top-rated Electronics-related sites on the Web. -
Personal Computing
Recent History of Computers: Machines for Mass Communication Waseda University, SILS, Science, Technology and Society (LE202) The communication revolution ‚ In the first period of the history of computers, we see that almost all development is driven by the needs and the financial backing of large organizations: government, military, space R&D, large corporations. ‚ In the second period, we will notice that the focus is now shifting to small companies, individual programers, hobbyists and mass consumers. ‚ The focus in the first period was on computation and control. In the second period, it is on usability and communication. ‚ A mass market for computers was created, through the development of a user-friendly personal computer. Four generations of computers 1st 2nd 3rd 4th 5th Period 1940s–1955 1956–1963 1964–1967 1971–present ? Tech- vacuum transistors integrated micro- ? nology tubes circuits processors Size full room large desk sized desk-top, ? (huge) machine hand-held Software machine assembly operating GUI ? language language systems interface The microprocessor ‚ In 1968, the “traitorous seven” left Fairchild Semiconductor to found Intel. ‚ In 1969, Busicom, a Japanese firm, commissioned Intel to make a microprocessor for a handheld calculator. ‚ This lead to the Intel 4004. Intel bought the rights to sell the chip to other companies. ‚ Intel immediately began the process of designing more and more powerful microchips. Schematic: The Intel 4004 ‚ This has lead to computers small enough to fit in our hands. Consumer electronics ‚ The microprocessor made it possible to create more affordable consumer electronics. ‚ The Walkman came out in 1979. Through the 1980s video players, recorders and stereos were marketed. -
Macintosh Powerbook 100.Pdf
Macintosh PowerBook 100 System Fact Sheet SYSTEM POWER PORTS ADB: 1 Introduced: October 1991 Max. Watts: 17 Video: none Discontinued: August 1992 Amps: 2.00 Floppy: HDI-20 Gestalt ID: 24 BTU Per Hour: 58.14 SCSI: HDI-30 Form Factor: PowerBook 100 Voltage Range: 100-240 GeoPort Connectors: none Weight (lbs.): 5.1 Freq'y Range (Hz): 50-60 Ethernet: none Dimensions (inches): 1.8 H x 11 W x 8.5 D Battery Type: PB100, lead acid Microphone Port Type: none Soft Power Printer Speaker Codename: Asahi, Derringer, Monitor Power Outlet Headphone Oder Number: Modem KB Article #: 8981, 8982 Airport Remote Control Support Discontinued 9/1/98 1 VIDEO Built-in Display: 9" supertwist LCD Maximum Color Bit-depth At: 512 640 640 640 800 832 1024 1152 1280 VRAM Speed: VRAM Needed: Video Configuration: x384 x400 x480 x8702 x600 x624 x768 x870 x1024 n/a built in built-in LCD screen n/a 1 n/a n/a n/a n/a n/a n/a n/a 1 1-bit = Black & White; 2-bit = 4 colors; 4-bit = 16 colors; 8-bit = 256 colors; 16-bit = Thousands; 24-bit = Millions 2 The maximum color depth listed for 640x870 is 8-bit, reflecting the capabilities of the Apple 15" Portrait Display. LOGIC BOARD MEMORY Main Processor: 68000, 16 MHz Memory on Logic Board: 2 MB PMMU: none Minimum RAM: 2 MB FPU: none Maximum RAM: 8 MB Data Path: 16-bit, 16 MHz RAM Slots: 1 PB1xx L1 Cache: none Minimum RAM Speed: 100 ns L2 Cache: none RAM Sizes: 2, 4, 6 MB Secondary Processor: none Install in Groups of: 1 Slots: modem Speech Recognition Supported Supported Macintosh System Software: SOFTWARE A/UX 1.0 NOS 1.11 ProDOS -
THE MICROPROCESSOR Z Z the BEGINNING
z THE MICROPROCESSOR z z THE BEGINNING The construction of microprocessors was made possible thanks to LSI (Silicon Gate Technology) developed by the Italian Federico Faggin at Fairchild in 1968. From the 1980s onwards microprocessors are practically the only CPU implementation. z HOW DO MICROPROCESSOR WORK? Most microprocessor work digitally, transforming all the input information into a code of binary number (1 or 0 is called a bit, 8 bit is called byte) z THE FIRST MICROPROCESSOR Intel's first microprocessor, the 4004, was conceived by Ted Hoff and Stanley Mazor. Assisted by Masatoshi Shima, Federico Faggin used his experience in silicon- gate MOS technology (1968 Milestone) to squeeze the 2300 transistors of the 4-bit MPU into a 16-pin package in 1971. z WHAT WAS INTEL 4004 USED FOR? The Intel 4004 was the world's first microprocessor—a complete general-purpose CPU on a single chip. Released in March 1971, and using cutting-edge silicon- gate technology, the 4004 marked the beginning of Intel's rise to global dominance in the processor industry. z THE FIRST PERSONAL COMPUTER WITH MICROPROCESSOR MS-DOSIBM introduces its Personal Computer (PC)The first IBM PC, formally known as the IBM Model 5150, was based on a 4.77 MHz Intel 8088 microprocessor and used Microsoft´s MS-DOS operating system. The IBM PC revolutionized business computing by becoming the first PC to gain widespread adoption by industry. z BIOHACKER z WHO ARE BIOHACKER? Biohackers, also called hackers of life, are people and communities that do biological research in the hacker style: outside the institutions, in an open form, sharing information. -
Chapter 1 Computer Basics
Chapter 1 Computer Basics 1.1 History of the Computer A computer is a complex piece of machinery made up of many parts, each of which can be considered a separate invention. abacus Ⅰ. Prehistory /ˈæbəkəs/ n. 算盘 The abacus, which is a simple counting aid, might have been invented in Babylonia(now Iraq) in the fourth century BC. It should be the ancestor of the modern digital calculator. Figure 1.1 Abacus Wilhelm Schickard built the first mechanical calculator in 1623. It can loom work with six digits and carry digits across columns. It works, but never /lu:m/ makes it beyond the prototype stage. n. 织布机 Blaise Pascal built a mechanical calculator, with the capacity for eight digits. However, it had trouble carrying and its gears tend to jam. punch cards Joseph-Marie Jacquard invents an automatic loom controlled by punch 穿孔卡片 cards. Difference Engine Charles Babbage conceived of a Difference Engine in 1820. It was a 差分机 massive steam-powered mechanical calculator designed to print astronomical tables. He attempted to build it over the course of the next 20 years, only to have the project cancelled by the British government in 1842. 1 新编计算机专业英语 Analytical Engine Babbage’s next idea was the Analytical Engine-a mechanical computer which 解析机(早期的机 could solve any mathematical problem. It used punch-cards similar to those used 械通用计算机) by the Jacquard loom and could perform simple conditional operations. countess Augusta Ada Byron, the countess of Lovelace, met Babbage in 1833. She /ˈkaʊntɪs/ described the Analytical Engine as weaving “algebraic patterns just as the n. -
Annual Report
2015 Annual Report ANNUAL 2015 REPORT CONTENTS i Letter from the President 4 ii NYSERNet Names New President 6 iii NYSERNet Members Institutions 8 iv Membership Update 9 v Data Center 10 vi VMWare Quilt Project 11 vii Working Groups 12 viii Education Services 13 ix iGlass 14 x Network 16 xi Internet Services 17 xii Board Members 18 xiii Our Staff 19 xiv Human Face of Research 20 LETTER FROM THE PRESIDENT Dear Colleagues, I am pleased to present to you NYSERNet’s 2015 Annual Report. Through more than three decades, NYSERNet’s members have addressed the education and research community’s networking and other technology needs together, with trust in each other guiding us through every transition. This spring inaugurates more change, as City. The terrible attack of Sept. 11, 2001, we welcome a new president and I will step complicated achievement of that goal, made down from that position to focus on the it more essential, and taught a sobering research community’s work and needs. lesson concerning the importance of communication and the need to harden the By itself, working with NYSERNet’s infrastructure that supports it. We invested extraordinary Board and staff to support in a wounded New York City, deploying fiber and building what today has become a global exchange point at “ These two ventures formed pieces 32 Avenue of the Americas. In the process, we forged partnerships in a puzzle that, when assembled, that have proved deep and durable. benefited all of New York and beyond.” Despite inherent risks, and a perception that New York City the collective missions of our members institutions might principally benefit, for the past 18 years has been a privilege NYSERNet’s Board unanimously supported beyond my imagining.