I was trying to figure out how APIC and IRQL are related, and I can't quite get it organized in my head. So far I have this, which I think is right: The PIC used to support up to 15 different hardware ...

I'm writing a device driver for the 2.4 series kernel. My board is a PCI device that comes up wanting to use IRQ 10, which is the same one my ethernet card uses. This means I have to wade through ...

If this service is called from an application thread, the interrupt posture remains part of that thread s context. For example, if the thread calls this routine to disable interrupts and then suspends ...

Just as you can often treat device registers as a memory-mapped struct, you can treat an interrupt vector as a memory-mapped array. In my last column, I suggested that you use casts sparingly and with ...

The hardware devices connected to your computer use interrupt requests to obtain permission from the microprocessor to perform specific actions. If a device can't communicate with the processor ...

Defining device drivers Discussing the difference between architecture-specific and board-specific drivers Providing several examples of different types of device drivers Most embedded hardware ...

Interrupts are a major feature of most embedded microcontrollers and effective real time response to interrupts is vital in low power systems that often rely on a ‘run fast then stop’ approach to ...