Couverture de IBM 1620 Model I
Titre du livre:

IBM 1620 Model I

Betascript Publishing (24-08-2010 )

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ISBN-13:

978-613-1-46447-8

ISBN-10:
6131464472
EAN:
9786131464478
Langue du livre:
Anglais
texte du rabat:
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The IBM 1620 Model I was the original implementation of the IBM 1620 scientific computer, introduced in 1959. This unit (commonly called "1620" until the Model II was introduced) was produced as inexpensively as IBM could make it, in order to keep the price low. One industry magazine (Datamation) mentioned that the 1620 was the first IBM computer for which the basic system could be leased for a monthly rate less than its number. It did not even have conventional ALU hardware: all arithmetic was done by table lookup in core memory. Addition and Subtraction used a 100 digit table (@ address 00300..00399). Multiplication used a 200 digit table (@ address 00100..00299). In the basic machine division used software subroutines, but optional divide hardware could be installed using a repeated subtraction algorithm. Floating point arithmetic instructions were an available option (if the divide option was installed).
Maison d'édition:
Betascript Publishing
Site Web:
https://www.betascript-publishing.com/
Edité par:
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
Numéro de pages:
96
Publié le:
24-08-2010
Stock:
Disponible
Catégorie:
Systèmes d'exploitation, Interfaces d'utilisateurs
Prix:
34.00 €
Mots-clés:
IBM 1400 Series, IBM 1440, IBM 1410, IBM 1401

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