The last thread I posted in got me thinking, is there any list or even better scans of all the NES EPROM boards used for prototypes? I checked the NES Cart Database and only found TKEPROM, I know of and have seen SKEPROM also. Are these the only EPROM specific PCB and the rest are regular production boards with some rewiring to allow EPROM or is there more? 

If you prototype collectors have pics of others I would love to see them.

I have UNEPROM boards at the very least, but I'd assume i have others. Some have multiple revisions, as well.

Oddest one i have off the top pf my head for the NES is an Atari (note, not Tengen) dev board. I have probably a dozen or so that are unpopulated as well, I'll see what i can dig out tomorrow.