10 Questions
What do interrupts act as?
Hardware-generated function calls
What generates signals to the processor, which interrupts software execution?
I/O devices
What is executed by the processor for an I/O device?
Interrupt service routine (ISR
What is used to manage multiple interrupts?
Interrupt priority encoding system
What must the ISR do after executing the appropriate interrupt service routine for the I/O device?
All of the above
What must be closed to prevent conflicts with background code?
Interrupt windows
Where can the PIC be accessed?
Port addresses 0x20 and 0x21
What are exceptions and software interrupts based on?
None of the above
What is provided as an example code for interrupts?
COM2 receiver interrupts
What must the ISR do after saving context?
Finish execution promptly
Study Notes
- Interrupts act as hardware-generated function calls.
- I/O devices generate signals to the processor, which interrupts software execution.
- The processor executes an appropriate interrupt service routine (ISR) for the I/O device.
- An interrupt priority encoding system is used to manage multiple interrupts.
- The interrupt service routine must make the I/O device turn off the interrupt signal and send an end of interrupt (EOI) signal to the PIC.
- The ISR must save context and finish execution promptly.
- Interrupt windows must be closed to prevent conflicts with background code.
- The PIC is programmable and can be accessed at port addresses 0x20 and 0x21.
- Exceptions and software interrupts are internal and not based on external I/O devices.
- Example code for COM2 receiver interrupts is provided.
Test your knowledge of interrupt handling with this quiz! Learn about the basics of interrupts, how they work with I/O devices, and the steps involved in executing an interrupt service routine. Explore the use of interrupt priority encoding systems, PIC programming, and exception handling. Plus, practice your skills with example code for COM2 receiver interrupts. Put your understanding of interrupt handling to the test with this informative quiz!
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