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

1. Organisasi dan Arsitektur
Komputer
Ajeng Savitri Puspaningrum, M.Kom
Pertemuan 22

2. Operating System

3.  Learning the Definition of Operating
System (OS)
 Learning OS’s Compounent

4. COMPUTER SYSTEM

5. MAIN COMPONENT
SOFTWARE
BRAINWARE
HARDWARE

6. Brainware (User)
“People who use or operate the computer”

8. Hardware
“A computer component that can be seen and
touched physically”
• Processor
• Main memory
• Bus system
• Modul i/o
• I/o device

10. Software
“A component that is not physically visible, but
contained in a computer”

11. OPERATING SYSTEM
APPLICATION PROGRAM
FIRMWARE

12. Application Program
“Any program designed to perform a specific
function directly for the user or, in some cases,
for another application program”

13. Operating System
“System that running on a device that provides
services for applications to access the
capabilities of the device”

15. Definition
“A program that controls the execution of application programs
and acts as an interface between applications and the
computer hardware” (Stallings, 2005)
as Resource Manager
as a User/Computer Interface

16. As A Resource Allocator
“A computer is a set of resources for the movement,
storage, and processing of data and for the control of
these functions. The OS is responsible for managing
these resources”

17. As a User/Computer Interface
OS typically provides services in the following
areas :
Program development
Program execution
Access to I/O devices
Controlled access to files
System access
Error detection and response
Accounting

18. OS Objective
Convenience : An OS makes a computer more
convenient to use
Efficiency : An OS allows the computer system resources
to be used in an efficient manner.
Ability to evolve : An OS should be constructed in such a way
as to permit the effective development, testing, and
introduction of new system functions without interfering with
service

19. Perkembangan OS
Interactive
Batch
Single – program ( Uni – programming )
Multi – program ( Multi – tasking )
Time - sharing

20. Interactive
 Terjadi pada perkembangan komputer generasi awal
 Tanpa OS
 Program langsung dikerjakan oleh hardware
 Masalah :
Penjadwalan
Pengaturan waktu

21. Batch System (1950’s)
To improve CPU utility on handling jobs
The users of a batch operating system do not
interact with the computer directly
To speed up processing, jobs with similar needs are
batched together and run as a group

22. Multiprogramming System
Puts process on main memory by their priority on
queue
Puts process on CPU to be executed
Manages process changing, either because it has
finished or because it requires i/o

23. Single – Program
vs
Multi – Program

25. Time Sharing System
Usually called by multitasking
Similiar to multiprogramming but the time for
process to use CPU is restricted / limited

26. Multiprocessing System
Has more than 1 processor
Paralel system
Using bus, clock, memory, and others tools together
Each processor do different job
Distributed system

27. Batch Multiprogramming VS Time Sharing

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

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