What is the difference between vectored and autovectored interrupts?
When are autovectored interrupts employed in 68K systems? A vectored interrupt is one in which the peripheral supplies an interrupt vector in response to the interrupt acknowledge. This is used to index into a table pointing to the interrupt handling routine for the device. In an autovectored interrupt, the handling routine is determined by the interrupt level. Consequently since several devices could use the same interrupt level, the routine must poll the devices to determine which one generated the interrupt, and then handle it. Autovectored interrupts are used for devices that are too simple to generate vectored interrupts, such as 6800 family peripherals such as the ACIA, or an interrupt switch. 6.8 Consider a system with n vectored devices. Suppose the ith device generates a level Ii interrupt requiring ti seconds to handle, and the mean time between interrupts is fi. How would you analyze system behavior? The main concern is whether the system can handle all the interrupts withou
