Table of Contents
- 1 How can the processor ignore other interrupts it is servicing one?
- 2 In which way of handling multiple interrupts processors ignore the interrupt request signal?
- 3 What is meant by maskable interrupts?
- 4 What is the maximum size of data can be processed by 8085 microprocessor?
- 5 Which interrupt request does the processor accept if it receives interrupt requests from two or more devices simultaneously?
- 6 When a multiple device interrupts have occurred How does the processor decide which one to process?
How can the processor ignore other interrupts it is servicing one?
Explanation: The maskable interrupts are usually low priority interrupts which can be ignored if a higher priority process is being executed. Explanation: The 8085 microprocessor are designed to complete the execution of the current instruction and then to service the interrupts.
How does the processor respond to an occurrence of the interrupt?
If the request is accepted, the processor responds by suspending its current activities, saving its state, and executing a function called an interrupt handler (or an interrupt service routine, ISR) to deal with the event. Systems that use interrupts in these ways are said to be interrupt-driven.
In which way of handling multiple interrupts processors ignore the interrupt request signal?
Prioritized interrupts not only allow multiple devices to be connected to the interrupt line but also allow the CPU to ignore less important interrupt requests while it handles more important requests.
When dealing with multiple devices interrupts?
1. When dealing with multiple devices interrupts, which mechanism is easy to implement? Explanation: In this method, the processor checks the IRQ bits of all the devices, whichever is enabled first that device is serviced.
What is meant by maskable interrupts?
1. Maskable interrupt is a hardware Interrupt that can be disabled or ignored by the instructions of CPU. A non-maskable interrupt is a hardware interrupt that cannot be disabled or ignored by the instructions of CPU.
When an interrupt is enabled then where does the pointer moves immediately after this interrupt has occurred?
1. When an interrupt is enabled, then where does the pointer moves immediately after this interrupt has occurred? Explanation: When an interrupt occurs, then it jumps to a fixed memory location in memory called the interrupt vector table that holds the address of the Interrupt Service Routine. 2.
What is the maximum size of data can be processed by 8085 microprocessor?
Differences between 8085 and 8086 microprocessor
| Serial No. | 8085 microprocessor |
|---|---|
| 1 | The data bus is of 8 bits. |
| 2 | The address bus is of 16 bits. |
| 3 | The memory capacity is 64 KB.Also 8085 Can Perform Operation Upto 2^8 ie. 256 numbers. A number greater than this is to taken multiple times in 8 bit data bus. |
How do processor interrupts work?
Interrupts are signals sent to the CPU by external devices, normally I/O devices. They tell the CPU to stop its current activities and execute the appropriate part of the operating system. Software Interupts are generated by programs when they want to request a system call to be performed by the operating system.
Which interrupt request does the processor accept if it receives interrupt requests from two or more devices simultaneously?
Daisy Chaining Priority The interrupt line request is common to all devices.
How can the CPU recognize the device requesting an interrupt?
A device requesting an interrupt can identify itself by sending a special code to the processor over the bus. This enables the processor to identify individual devices even if they share a single interrupt-request line.
When a multiple device interrupts have occurred How does the processor decide which one to process?
Handling Multiple Devices: When more than one device raises an interrupt request signal, then additional information is needed to decide which device to be considered first. The following methods are used to decide which device to select: Polling, Vectored Interrupts, and Interrupt Nesting.