00 Introduction To The Ibm 7090; General System Operation; Functional Parts Of Acomputer System - IBM 7090 Instruction-Reference

1. O. 00 INTRODUCTION TO THE IBM 7090 DATA PROCESSING SYSTEM
The IBM 7090 Data Processing System is a solid-state digital computer that is approx-
imately six times faster than its vacuum tube predecessor, the IBM
709.
Along with
increased speed, the 7090 is also mbre versatile. It can perform more than 200 distinct
operations.
The
7090
is used in such fields as airplane, rocket, and missile design, atomic
research, weather, and missile tracking. Using this computer, calculations in these
fields can be done in much more detail and with greater accuracy than ever before.
Much of the need for experimental testing is also eliminated; rapid, detailed calcula-
tions during design can foresee many troubles that formerly would be indicated only by
testing an assembly.
The IBM
7090
is also advantageous and economically feasible for business paper
work such as payroll, billing, and sales analysis. Management, with the aid of such
a computer, can base business decisions on more up-to-date information than was ever
before possible.
1.1.00
GENERAL SYSTEM OPERATION
A computer system may be made to add, subtract, multiply or divide. According
to its make-up, a system may also print, read cards, punch cards, read or write mag-
netic tape, or perform many logic operations. Shifting numbers right or left, setting
the algebraic sign, and comparing the size of two numbers are examples of logic oper-
ations.
To solve a problem, a sequence of arithmetic and logic operations and the required
data are needed. A computer does one operation at a time. When one operation is
complete, the next one in sequence begins. Executing operations continues until the
sequence has run its course and the final answer to the problem has been computed.
The sequence of operations for solving a problem is called a program.
1. 2. 00 FUNCTIONAL PARTS OF A COMPUTER SYSTEM
The normal make-up of a computer system consists of five functional parts:
1. Input
4. Control of all sections
2. Storage for data and instructions 5. Output
3. Arithmetic for actual computing
These parts work together to accept data and instructions into the system, compute
the solution to the problem, and send the solution back out of the system. This all takes
place under the direction of the program.
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