So I bought this back in 2007-2008 from a user on here and that's about all the history I know.

I'm usually only familiar with EPROM prototype identifying so I wanted to know for sure that this is indeed what I bought it as ... and also I noticed it is on a Sunsoft board, did they make all their prototypes on Sunsoft boards?

I'd cover up those ROM windows with something to avoid {further} data corruption.

I thought Sunsoft boards (specifically ROTJ) were necessary for a repro, so I don't think that's too surprising (though that's just a guess).

Sorry I couldn't help more, very interesting item you have there.

While of course it is a good idea to cover them, if the PCB has been inside the shell I'd be surprised if the EPROMs were exposed to much UV light.

Interesting, was the seller a Swedish person?
Would make sense since Mr. Gimmick was only released in Japan and Scandinavia.
Also, that top label on the cart is in Swedish and says: "Test copy, from Sunsoft".

I think that's one I got from Spain?

Correct me if I'm wrong, but isn't the retail NES FME-7 board (for ROTJ) still a Nintendo Mask ROM compatible board? That would mean the pictured proto board is specifically made to accept EPROMs and is therefore a real prototype.

no

Weird, so that's one of the only NES games with EPROM compatible 32-pin sockets.

Its because the board was made by Sunsoft.

Also this might be a good place to ask this.

What was nintendos reasoning for non-jedec standard for pinouts and swapping the higher address lines to the upper pins?  Was it for bootleg protection since they dont follow the eprom jedec pinout?

It might have been light protection against dumping game ROMs, but another reason is so Nintendo could make 28-pin 1Mbit PRG ROMs fit into a 32 pin socket while still giving it +5v on pin 28 (hole 30 in the socket). This was done to reduce production costs, lots of games used 1Mbit PRG ROMs. This modified socket thing wasn't done for CHR.

But they also kept it for snes. I think you worded it they way i wanted to an dumping the roms

There aren't any 28 pin 1Mbit ROMs in SNES games, that I know of at least. SNES is 32 pin and 36 pin for standard games with no add-on chips. The reason is once again production costs, the number of pins on a chip greatly affects how expensive it is. Nintendo was using 32 and 36 pin 8-bit chips for SNES while Sega was using 40 and 42 16-bit chips on Genesis. Yes, SNES chips are also non-standard.

Oh i know, but what i meant was, from what I see Nintendo kept the same pin layout (mainly the MMC5 pinout) for their 36 pin SNES roms, only adding A20, A21 and A22 at their upper pins (1, 2 and 35)

sounds like a review copy.