Which of the following interrupt is maskable?
Maskable Interrupts are those which can be disabled or ignored by the microprocessor. These interrupts are either edge-triggered or level-triggered, so they can be disabled. INTR, RST 7.5, RST 6.5, RST 5.5 are maskable interrupts in 8085 microprocessor.
Which of the following is an example of non maskable interrupt?
Difference between maskable and nonmaskable interrupt :
| SR.NO. | Maskable Interrupt | Non Maskable Interrupt |
|---|---|---|
| 8 | RST6.5, RST7.5, and RST5.5 of 8085 are some common examples of maskable Interrupts. | Trap of 8085 microprocessor is an example for non-maskable interrupt. |
Are software interrupts Maskable?
Non-Maskable interrupt − In this type of interrupt, we cannot disable the interrupt by writing some instructions into the program. For example: TRAP. Software interrupt − In this type of interrupt, the programmer has to add the instructions into the program to execute the interrupt.
Is a non maskable interrupt?
In computing, a non-maskable interrupt (NMI) is a hardware interrupt that standard interrupt-masking techniques in the system cannot ignore. It typically occurs to signal attention for non-recoverable hardware errors. Some NMIs may be masked, but only by using proprietary methods specific to the particular NMI.
What are the two types of interrupts in 8086?
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.
How many dedicated interrupts are there in 8086?
Type 0 – 255 : The 8086 INT instruction can be used to cause the 8086 to do one of the 256 possible interrupt types. The interrupt type is specified by the number as a part of the instruction.
What are the applications of NMI interrupt of 8086?
8086 has two pins to accept hardware interrupts, NMI and INTR. These interrupts are caused by writing the software interrupt instruction INT n where ‘n’ can be any value from 0 to 255 (00H to FFH). Hence all 256 interrupts can be invoked by software.
What is the condition for type 4 interrupt to occur?
When this interrupt occurs a program would execute up to its break point. -Type 4 interrupts: Also known as overflow interrupts is generally existent after an arithmetic operation was performed.
What are the three sources of interrupts in 8086?
In other words an 8086 interrupt can come from any one of three sources.
- An external signal applied to the non-maskable interrupt (NMI) input pin or to the interrupt input pin (HARDWARE INTERRUPT).
- Execution of the interrupt instruction (SOFTWARE INTERRUPT)
What are the predefined interrupts in 8086?
The INTEL predefined interrupts for 8086 are; Single step(Type-1) interrupt. Nonmaskable interrupt, NMI(Type-2) interrupt. Breakpoint(Type-3) interrupt.