nesdev.org

Thanks for the quick reply, that looks like exactly what I need.

But man I can't look at that site for more than a few seconds without getting a headache.

Can the ROM chips on a SNES cart be replaced with flashable EEPROMS, like on a NES cart?

I've seen the dev carts at http://www.tototek.com/ but I'd be more interested in hacking up a cart myself!