1providing a mechanism to interrupt a program's execution. Interrupts allows the computer to handle time-critical tasks such as I/O device operations. In this blog post, I look at the interrupt features in the Intel 8086 (1978) and how they are implemented in silicon, a combination of ...
Work queues are the final mechanism we can use to defer work. Work queue items are executed in the context of a kernel thread. The kernel thread associated with the work queue runs as a process that is scheduled. As it runs in the context of a kernel thread, it can make use of all...
The first three limitations should be pretty obvious given the nature of the interrupt mechanism – since it is triggered by an external event, there cannot be parameters or a return value because there is no proper function call in the first place. The last limitation is more of a recommenda...
A method for allowing a protected mode kernel to service, in virtual 8086 mode, hardware interrupts which occur during execution of ring 0 protected mode code. When an interrupt occurs during execution of ring 0 code, the microprocessor copies the state of the last virtual 8086 environment on t...
GENERAL DESCRIPTION--INTERRUPT MECHANISM As shown in FIGS. 1 and 3, the FIFO associated with each microprocessor is part of that processor's shared resources, accessible by all other processors. Asynchronous hardware and software interrupts are transmitted over system bus 105 through the use of thes...
In subject area: Computer Science A software interrupt refers to a mechanism that allows a program to interrupt its execution and transfer control to an interrupt service routine (ISR). It is commonly used for tasks such as reading input from a keyboard, displaying text on the screen, or acce...
In an interrupt vector table, the first five interrupt vectors are identical in all Intel microprocessor family members, from the 8086 to the Pentium. Other interrupt vectors exist for the 80286 that are upward-compatible to 80386, 80486, and Pentium to Pentium 4, but not downward-compatible to...