Question: In memory-mapped I/O, if a user program directly accesses actual device ports in $00008000 - $00009FFF, CPU needs to cause an exception. However, 68K has

"In memory-mapped I/O, if a user program directly accesses actual device ports in $00008000 - $00009FFF, CPU needs to cause an exception. However, 68K has no software exception in illegal I/O port accesses in the user mode. Based on the following diagram, design and draw a logical circuit that interrupts CPU if a user program accesses $00008000 - $00009FFF."

We were given some hints on this but I still don't really understand what to do. I've already attempted the circuit on my own but it doesn't look right.

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