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Is trap is maskable or nonmaskable?
The TRAP interrupt is non-maskable.
Why is trap nonmaskable in 8085 microprocessor?
The TRAP interrupt is nomaskable in the 8085 microprocessor because TRAP is intended to indicate some serious system problem, or a hardware assisted debugger single step facility.
Which is the highest priority interrupt for 8051?
The highest priority interrupt in the 8085 is the TRAP interrupt.
How can you trap mask in 8085 microprocessor?
The TRAP instruction in the 8085 is NONMASKABLE, which means it cannot be masked, i.e. it cannot be disabled. The only way to mask or disable TRAP is with external hardware, such as an I/O pin and an AND gate.
What peripheral has the highest interrupt?
The peripheral with the highest interrupt priority depends on the hardware and software design of the particular system. In the 8085, the TRAP interrupt has the highest priority. The peripheral connected to TRAP is your choice.
Which type of interrupt can not be masked by software?
The TRAP interrupt can not be masked by software, unless there is hardware in place to allow that, perhaps by anding an output bit with the TRAP request line.
Why are interrupt required?
Interrupts are required in order to get the attention of the CPU. A CPU typically has two interrupt lines. One is the nonmaskable interrupt line (NMI). That is used in the case of critical errors, since this interrupt cannot be ignored. The other one is the regular interrupt line. That is used by hardware devices and certain software to get the attention of the CPU. When you move a mouse, for instance, that creates both a hardware and software interrupt. So the CPU would then process the mouse driver code and move the cursor, then get back to what it was doing.
What is a TrapHandler?
A trap handler, also called an interrupt handler or interrupt service routine (ISR) is a program that executes when predefined events occur in a computer. There are software and hardware interrupts. An interrupt causes the computer's processor to stop running its current task and immediately run the trap handler to service the interrupt.
Which is the highest priority interrupt 1 rst5.5 2 rst6.5 3 TRAP 4 HLD?
Which is the highest priority interrupt . 1. rst5.5 2. rst6.5 3. TRAP 4. HLD
Trap in micro processer?
It is an interrupt having highest priority in 8085
What is a non-maskable?
A non-maskable interrupt is an interrupt that cannot be blocked, or masked, by the processor. In the 8085, TRAP is such an interrupt. If TRAP goes high and stays high, an interrupt vector sequence at address 24H will occur, and there is nothing the processor can do to prevent that.However, external hardware can accomplish the same thing. In a project that I designed, I needed a fourth single pin interrupt beyond RST5.5, RST6.5, and RST7.5, but I needed it to be maskable, so I built a flip flop in hardware that I could set or reset which would be AND'ed with the interrupt request to generate a maskable TRAP.
What is the purpose of interrupts in Operating System?
Answer: An interrupt is a hardware-generated change-of-flow within the system. An interrupt handler is summoned to deal with the cause of the interrupt; control is then returned to the interrupted context and instruction. A trap is a software-generated interrupt. An interrupt can be used to signal the completion of an I/O to obviate the need for device polling. A trap can be used to call operating system routines or to catch arithmetic errors.Type your answer here...
