Back in the day, I managed to figure out a way to get into SEGA's dev site by guessing a URL beyond the login page. It wasn't secured in any way. The username and password would just pass you into a hidden URL, so guessing a URL was functionally identical to logging in with proper credentials When I figured that out, I downloaded the entire contents of the site. Lots of PDFs with "SEGA Confidential" watermarks, header files and small executable utilities.

Luckily I was working at an ISP and had lots of bandwidth to get it all before they closed the hole a few days later.

I tried to write an emulator, and wrote a CD reader/debugger that worked pretty slick, but never got anything to a place where I could release anything.

I've always kind of wondered if I have anything that hasn't made its way into the general SS emulation community...