Pin compatibility of 2716, 8316, 9218

I'm looking at dumping the ROMs from a VT100 board, but I'm having trouble finding pinouts of the ROMs. The VT100 FMPS says that locations E40, E45, E52 and E56 on the basic board are 8316E 2Kx8 ROMs. However, the schematics don't show the designations for all 24 pins. The online Chip Directory doesn't contain the pinout for the 8316 either. My PROM Programmer will handle 2716 EPROMs, which the Chip Dir. does contain a pinout for, and looks compatible with the 8316. I'd be tempted to try dumping one of them, were it not for the fact that E45 on my board is actually labelled "AM9218CPC", the pinout for which is also absent from the Chip Dir. Could anyone please tell me definitively whether the 8316, 9218 and 2716 are pin-compatible? Cheers, Paul