Registering ISR

Writing an Interrupt Service Routine is not that trivial. An ISR must do things like saving context of the currently executing process, reinitializing the PIC etc. Fortunately a top level ISR is provided by OSkit in

kern/x86/pc/base_irq_inittab.S

You can however have your own ``C'' function as a second level interrupt handler. The low level things are handled by OSkits handler, which then branches to your high level ``C'' handler function.

You can register your schedule function as the high level handler by setting

base_irq_handlers[0]=&schedule;

Read the chapter on Kernel Support Library. That chapter covers all of the above topics.