interrupt priority levels - definizione. Che cos'è interrupt priority levels
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Cosa (chi) è interrupt priority levels - definizione

SIGNAL TO THE PROCESSOR EMITTED BY HARDWARE OR SOFTWARE INDICATING AN EVENT THAT NEEDS IMMEDIATE ATTENTION
Hardware interrupt; Interrupts; Software interrupt; Software Interrupt; Spurious Interrupt; Interrupt mask; Maskable interrupt; Masked interrupt; Level triggered interrupt; Edge triggered interrupt; Maskable interrupts; Interupt; Spurious interrupt; Trap (computing); Fault (computing); Interrupt line; Maskable Interrupt; Kernel trap; Interrupted; Interrupting; Interrupt handling; OS Trap; Shared interrupt; Interrupt (computing); IRQ affinity; Receive packet steering; Receive flow steering; Interrupt mechanism; Computer interrupt; Computer Interrupt
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  • Interrupt sources and processor handling

interrupt priority level         
PART OF THE CURRENT SYSTEM INTERRUPT STATE
The Motorola 68000 family of processors can be at an interrupt priority level from 0 (no interrupt in progress) up to 7. While the processor is handling an interrupt at one level, it will ignore other interrupts at that level or lower. (1994-11-23)
Interrupt priority level         
PART OF THE CURRENT SYSTEM INTERRUPT STATE
The interrupt priority level (IPL) is a part of the current system interrupt state, which indicates the interrupt requests that will currently be accepted. The IPL may be indicated in hardware by the registers in a Programmable Interrupt Controller, or in software by a bitmask or integer value and source code of threads
Interrupt handler         
COMPUTING FUNCTION TRIGGERED BY AN INTERRUPT
Interrupt service routine; Interrupt routines; Interrupt Handler; Interrupt Service Routine; FLIH; SLIH
In computer systems programming, an interrupt handler, also known as an interrupt service routine or ISR, is a special block of code associated with a specific interrupt condition. Interrupt handlers are initiated by hardware interrupts, software interrupt instructions, or software exceptions, and are used for implementing device drivers or transitions between protected modes of operation, such as system calls.

Wikipedia

Interrupt

In digital computers, an interrupt (sometimes referred to as a trap) is a request for the processor to interrupt currently executing code (when permitted), so that the event can be processed in a timely manner. If the request is accepted, the processor will suspend its current activities, save its state, and execute a function called an interrupt handler (or an interrupt service routine, ISR) to deal with the event. This interruption is often temporary, allowing the software to resume normal activities after the interrupt handler finishes, although the interrupt could instead indicate a fatal error.

Interrupts are commonly used by hardware devices to indicate electronic or physical state changes that require time-sensitive attention. Interrupts are also commonly used to implement computer multitasking, especially in real-time computing. Systems that use interrupts in these ways are said to be interrupt-driven.