3 COMPONENTS OF A COMPUTER SYSTEM 1. PROCESSOR Arithmetic-logic
unit Control unit 2. MAIN MEMORY 3. PERIPHERAL DEVICES:
INPUT/OUTPUT DEVICES SECONDARY MEMORY
Slide 4
4 HARDWARE COMPONENTS OF A TYPICAL COMPUTER SYSTEM Main Memory
ALU Control unit Input/Output devices Secondary Memory Processor
BUS
Slide 5
5 THE PROCESSOR INTERPRETS EACH INSTRUCTION IN THE PROGRAM AND
EITHER CARRIES IT OUT OR SEES THAT IT IS CARRIED OUT BY OTHER
COMPONENTS OF THE COMPUTER. MADE UP OF TWO PARTS: 1.
ARITHMETIC-LOGIC UNIT (ALU) 2. CONTROL UNIT (CU)
Slide 6
6 THE ARITHMETIC-LOGIC UNIT PERFORMS MATHEMATICAL AND LOGICAL
OPERATIONS. MADE UP OF REGISTERS, THE INTERCONNECTIONS BETWEEN
COMPONENTS, AND THE ALU CIRCUITRY.
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7 ARITHMETIC OPERATIONS ADD, SUBTRACT, MULTIPLY, DIVIDE (a + b)
x (c - d)
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8 COMPARISONS TO DETERMINE SUCH THINGS AS WHETHER TWO
CHARACTERS ARE THE SAME OR WHETHER ONE NUMBER IS LESS THAN, EQUAL
TO, OR GREATER THAN ANOTHER. ALLOW TO CODE SELECTION AND REPETITION
CONTROL STRUCTURES.
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9 LOGICAL OPERATIONS (MidtermGrade >= 90) AND (FinalGrade
>= 90) (MidtermGrade >= 90) OR (FinalGrade >= 90)
count
