Irq

Interrupt Handler - General Sequence Followed When Interrupts Occur By An External Device
... Interrupt request(IRQ) signal is sent by the device to the processor ... its present instruction (if any) and pays attention to the IRQ ... the device that its request has been granted and in response the device de-activates its IRQ ...

Intel 8259 - Programming Considerations - DOS and Windows
... operating systems map (at least the master) 8259 IRQs (if used on a platform) to another interrupt vector base offset ...

Interrupt Request
... compatible personal computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and ... are often identified by an index with the format of IRQ followed by a number ... APICs support a programming interface for up to 255 physical hardware IRQ lines per APIC, with a typical system implementing support for only around 24 total ...

IRQ Conflict - Conflicts
... In IBM-compatible personal computers, an IRQ conflict is a once common hardware error, received when two devices were trying to use the same interrupt request (or IRQ) to signal an interrupt to the ... PIC expects interrupt requests from only one device per line, thus more than one device sending IRQ signals along the same line will generally cause an IRQ conflict that can freeze a computer ... In some rare conditions, two devices can share the same IRQ as long as they are not used simultaneously ...

IRQ Conflict - X86 IRQs - Slave PIC
... IRQ 8 — RTC Timer IRQ 9 — The Interrupt is left open for the use of peripherals ... open interrupt / available or SCSI host adapter IRQ 10 — The Interrupt is left open for the use of peripherals ... open interrupt / available or SCSI or NIC IRQ 11 — The Interrupt is left open for the use of peripherals ...