From Claude with some prompting
The image illustrates the process of handling interrupts in a computer system. When an urgent job (Urgent Job Occurred) arises while another job (One Job is Working) is executing, an interrupt (Job Switching = Interrupt) occurs. This triggers the Interrupt Service Routine (ISR) to handle the interrupt.
The interrupt handling process is divided into two halves: the Top Half and the Bottom Half. The Top Half performs a “Very Short Work to avoid another job delay” and notifies the system of the interrupt occurrence. The Bottom Half handles the remaining work, also performing “Short Work to avoid another job delay.”
Lechuck Park 