What is an interrupt give examples of hardware and software interrupt?

A hardware interrupt occurs, for example, when an I/O operation is completed such as reading some data into the computer from a tape drive. A software interrupt occurs when an application program terminates or requests certain services from the operating system.

Is trap a software interrupt?

A trap is a software-produced interrupt that can be caused by various factors, including an error in instruction, such as division by zero or illegal memory access. A trap may also be generated when a user program makes a definite service request from the OS.

What are the software interrupts in 8086?

The 8086 has two hardware interrupt pins, i.e. NMI and INTR. NMI is a non-maskable interrupt and INTR is a maskable interrupt having lower priority. One more interrupt pin associated is INTA called interrupt acknowledge.

Which of the following is an software interupt?

Software Interrupts are those which are inserted in between the program which means these are mnemonics of microprocessor. There are 8 software interrupts in 8085 microprocessor. They are – RST 0, RST 1, RST 2, RST 3, RST 4, RST 5, RST 6, RST 7.

What is a software trap?

A trap is a synchronous interrupt triggered by an exception in a user process to execute functionality. Exception conditions like invalid memory access, division by zero, or a breakpoint can trigger a trap in an OS.

How many types of software interrupts are there?

TYPE 1 interrupt represents single-step execution during the debugging of a program. TYPE 2 interrupt represents non-maskable NMI interrupt. TYPE 3 interrupt represents break-point interrupt. TYPE 4 interrupt represents overflow interrupt.

What are the software interrupts in 8085?

8 software
There are 8 software interrupts in 8085, i.e. RST0, RST1, RST2, RST3, RST4, RST5, RST6, and RST7. Hardware interrupt − There are 5 interrupt pins in 8085 used as hardware interrupts, i.e. TRAP, RST7. 5, RST6. 5, RST5.

Are software interrupts synchronous?

An interrupt is usually defined as an event that alters the sequence of instructions executed by a processor. Synchronous interrupts are produced by the CPU control unit while executing instructions and are called synchronous because the control unit issues them only after terminating the execution of an instruction.