by pakeerat chuprayoon wannaporn dechpinya. electronic numerical integrator electronic numerical...
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By
Pakeerat Chuprayoon
Wannaporn Dechpinya
Electronic Numerical Integrator Electronic Numerical Integrator
and Computerand Computer
The world’s The world’s firstfirst eletronic digital eletronic digital
computer computer
It It was conceived and designed by was conceived and designed by John William Mauchly John William Mauchly andand J. Presper EckertJ. Presper Eckert of the University of the University of Pennsylaniaof Pennsylania
John William Mauchly
J. Presper Eckert
weighed thirty tons, and consumed two weighed thirty tons, and consumed two hundred kilowatts of power hundred kilowatts of power
Vacuum tube, over 19,000 of themVacuum tube, over 19,000 of them fifteen hundred relays fifteen hundred relays
and hundreds of thousands and hundreds of thousands of resistors, capacitors, of resistors, capacitors, and inductor and inductor
They were arranged in a "U" shape, with They were arranged in a "U" shape, with three panels on wheelsthree panels on wheels
An IBM card An IBM card and card punchand card punch
The function of the machine was split into eight basic circuit components :- the accumulator - buffer- initiator - gate- master programmer- multiplier, divider/square-root- function tables
The ENIAC was programmed by wiring cable connections and setting three thousand switch on the table
Another drawback on the machine was a side effect of its reliance on vacuum tubes, which tended to burn out very often
Construction of the ENIAC was completed in the fall of 1945
Its very first application as to solve atomic enery problems for the
Manhattan Project
Result of works in the first yearResult of works in the first year compute ballistic trajectories compute ballistic trajectories weather predictionweather prediction cosmic ray studies in astronomycosmic ray studies in astronomy random number studiesrandom number studies Designing wind tunnelDesigning wind tunnel
“ABC”
Atanasoff-Berry Computer
•In 1973 a U.S. District Court invalidated the
ENIAC patent and concluded that ABC was the first “COMPUTER”
• The first electronic digital computing device
Atanasoff-Berry Computer replica at 1st floor or Durham Center, Iowa State University
The machine was conceived in 1937 by Dr.Atanasoff and Clifford E.Berry.
Dr.Atanasoff Clifford E.Berry
The ABC innovation included electronic The ABC innovation included electronic computation, binary arithmetic, parallel computation, binary arithmetic, parallel processing, regenerative memory, and processing, regenerative memory, and separation of memory and computing separation of memory and computing functions.functions.
The system weighed more than 700 poundsThe system weighed more than 700 pounds
It contained approximately 1 mile of wire, 280 It contained approximately 1 mile of wire, 280 dual-triode vacuum tubes, 31 thyratrons.dual-triode vacuum tubes, 31 thyratrons.
1. Using binary digits
2. Performing all calculations using electronics
3. Computation and memory are separated.
* The memory was a pair of drums, each containing 1600 capacitors.
* The logic functions were fully electronic, implemented with vacuum tubes.
* It was not able to run entirely automatically through an entire problem.
Input and Output
Primary user I/O Intermediate results I/O
The ABC was designed for a specific purpose, The ABC was designed for a specific purpose, the solution of systems of simultaneous linear the solution of systems of simultaneous linear equations.equations.
The original ABC was eventually dismantled, The original ABC was eventually dismantled, when the University converted the basement to when the University converted the basement to classrooms, and all of its pieces except for one classrooms, and all of its pieces except for one memory drum were discarded.memory drum were discarded.
Name Year Digital Binary Elec-
tronic
program-mable
Turing complete
ABC 1937 -
1942
Yes Yes Yes No No
ENIAC 1946 Yes No Yes Partially, by
rewiring
Yes
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