How can we write an interrupt servicing routine, Computer Engineering

Assignment Help:

Q. How can we write an Interrupt Servicing Routine?

The following are the fundamentalthough rigid sequence of steps:

1. Save the system context (flags,registers etc. which will be modified by the ISR).

2. Disable the interrupts which may cause interference if allowed to take place during this ISR's processing

3. Enable those interrupts which may still be allowed to occur during this ISR processing.

4. Determine cause of the interrupt.

5. Take the suitable action for the interrupt like - receive and store data from serial port, set a flag to specify the completion of the disk sector transfer etc.

6. Restore the system context.

7. Re-enable any interrupt levels which were blocked during this ISR execution.

8. Resume execution of the process which was interrupted on occurrence of the interrupt.

MS-DOS offers you facilities which enable you to install well-behaved interrupt handlers such that they won't interfere with the operating system function or other interrupt handlers. These functions are:

1676_How can we write an Interrupt Servicing Routine.png

Related Discussions:- How can we write an interrupt servicing routine

Power and energy, Ask questiPower and EnergyQuestion 4Consider a processor ...

Ask questiPower and EnergyQuestion 4Consider a processor that runs at 2.5 GHz and 1 Volt. When running a given CPU-bound program,the processor consumes 100 W, of which 20 W is leak

Explain the recording mode for web vuser script, We use VuGen to make a Vus...

We use VuGen to make a Vuser script by recording a user performing typical business processes on a customer application. VuGen makes the script by recording the activity among the

What all 1's represents in 32bit ip addressing scheme, In 32bit IP Addressi...

In 32bit IP Addressing scheme all 1's represent? All 1's represent limited broadcast in 32 bit IP Addressing scheme.

Drawbacks, drawbacks of shadow paging

drawbacks of shadow paging

What types of calendars can you create with google calendar, What types of ...

What types of calendars can you create with Google Calendar? Personal calendars, like default calendar Public calendars, which others can access through the web

Write miss policy - cache memories, WRITE MISS POLICY: Write allo...

WRITE MISS POLICY: Write allocate fetch on write fetch entire block, then write word into block allocate a new block on each writ allocate block, but

Extension of propositional logic, Extension of propositional logic: Aw...

Extension of propositional logic: Away from proving theorems directly, and the other main use for rewrite rules is to prepare a statement just for use before we search for th

The components of i-way infrastructure, What are the components of I-way In...

What are the components of I-way Infrastructure? There are three mechanism of the I-way infrastructure: Consumer access equipment Local on-Ramps Global informa

#title.un ba lance out put differential amplitude, #questi on.. How it wor...

#questi on.. How it works explain

Java, what is inheritence and all types in java?

what is inheritence and all types in java?

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages