The disk ][ controller from another Apple IIe I own has decided that it is no longer working. It worked for a short while, in the sense that plugging in a floppy drive seemed to work fine. At one point by disconnecting and reconnecting the floppy drive (with the computer off) when I turned it on again, I smelled an unpleasant smell coming from the controller. I turned everything off. When I turned it on again, the floppy red LED stayed on with the engine running, everything seemed normal, but inserting a floppy disk it does not start automatically and even typing command PR#4, it seems that the floppy no longer receives the input from computer. What could have happened to the controller?
Thank you very much