Given the following set of events, show which routines the CPU is executing for times 0 to 100 ns. Each handler routine (with its interrupt request) takes 20 ns to complete. The priority of the interrupts ranges from IRQ6 as the highest priority interrupt to IRQ0 as the lowest priority interrupt.
Time Action
0 ns Start of main program
10 ns IRQ1
30 ns IRQ3
40 ns IRQ4
60 ns IRQ6
Time Action
0 ns: Start of Main Program
10 ns: IRQ1