> Further digging into available eproms that the programmer can read reveals > it CAN read 2532s, specifically the MCM2532 which the datasheet tells me has > the same pinout as the 2332. I still get "reverse insertion error" so I'm > guessing my PROMs are toast.
As others have said, normally when putting a smaller chip into a programmer with a bigger socket you keep the 'bottom row' of pins -- including ground -- in the same position for all chips. A look at the pinouts will show why. But as you can read 2716s that's not the problem. Often 'reverse insertion error' means the chip drew the wrong supply current -- often far too much. Which does suggest your ROMs are dead :-( -tony