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1. Organisasi dan Arsitektur
Komputer
Ajeng Savitri Puspaningrum, M.Kom
Pertemuan 10

2. Arithmetic and Logic Unit

3. Learning about ALU
Learning computer arithmetic

4. Arithmetic & Logic Unit
Does the calculations
Everything else in the computer is there to service
this unit
Using a simple digital logic device that can store
binary and boolean operations.
Handles integers
May handle floating point (real) numbers

5. ALU Inputs and Outputs

6. Kind of Computer Arithmetic
Computer Arithmetic
Binary Decimal
Integer Floating Point

7. Numbering System
Binary : 0 and 1
Octal : 0, 1, 2, 3, 4, 5, 6, 7
Decimal : 0 - 9
Hexadecimal : 1, 2, 3, . . ., 9, A, B, C, D, E and F

8. The Binary Numbering System
The most fundamental
numbering system in all digital
and computer based systems
and binary numbers follow the
same set of rules as the decimal
numbering system.
 Digital logic and computer systems
use just two values or states to
represent a condition, a logic level “1”
or a logic level “0”, and each “0” and
“1” is considered to be a single digit in
a Base-of-2 (bi) or “binary numbering
system”.

9. The Octal Numbering System
Octal numbers therefore
have a range of just “8”
digits, (0, 1, 2, 3, 4, 5, 6, 7)

10. The Hexadecimal Numbering System
Decimal Hexadecimal
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 A
11 B
12 C
13 D
14 E
15 F
Uses the Base of 16 system and
are a popular choice for
representing long binary values
because their format is quite
compact and much easier to
understand compared to the long
binary strings of 1’s and 0’s

11. Refference
Stalling, William, Computer Organization
and Architecture, 10th Edition, Pearson,
2015
Abdurohman, Maman, Organisasi dan
Arsitektur Komputer revisi ke-4, Penerbit
Informatika, 2017

12. Terima Kasih
ajeng.savitri@teknokrat.ac.id
https://teknokrat.ac.id/en/
https://spada.teknokrat.ac.id/