Interesting find. This is an AMD made 286 licensed by intel. It's probably later than 1984. Can you check to see if there are chips with markings like 8259A or 8237A in sockets? I bet this machine was a bit low end. The coprocessor slot is empty. Not exactly what I was looking for but if I can get the support chips like 8259A and 8237A, I may consider a trade.