Abstract

In this Presentation we briefly explained about real-time operating system. Real-time operating system. is used when rigid time requirements have been placed on the operating system as a processor or the flow of Data; thus it often used as a control device in a dedicated application. Real-time operating system are pronounced as RTOS (Are-Toss)

RTOS are mainly used in embedded systems .It covers the history and main aspects of hard and soft real-time systems , and also architecture of RTOS. Based on different time slot constraints RTOS are explained in different methods .

In multitasking environment we will provide RTOS, based on kernels .They are executed sequentially by using Interrupt Service Routines(ISR). RTOS means a task. we have three task states. RUNNING, READY AND BLOCKED. The difference between generic operating systems and real-time operating systems are that RTOS having on-situation decision making capability.

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different examples like QNX ,RT Linux, Phoenix_RTOS,Vx Works .etc.