A.1 B.2 C.3 D.4
A.ICW1，ICW2，ICW3 B.ICW1，ICW2，ICW4 C.ICW1，ICW3，ICW4 D.ICW2，ICW3，ICW4
A.單步中斷 B.除法錯，溢出中斷，軟中斷 C.INTR D.NMI
