RE: Sega Genesis Radica plug & plays: Radica vol. 1 and Radica Street Fighter Pack are dumped and in the software list currently.
I sent a undumped Sensible Soccer one to sean in an a unmarked batch a while ago https://i.imgur.com/chy1lG2.jpg
Edit: also found this on Ben Heck's site, same HW http://benheck.com/forums/viewtopic.php?f=12&t=33131
Sensible Soccer having 2 pads makes it distinct from the range, which came with 1, Haze was saying in the shoutbox how these games retain 2nd player functionality but only have 1 hardwired pad and should be documented so, this made me think about those Cubeworld devices and then oddly the gameboy, there are Gameboy games with 2 player functionality we lack due to no link support, how do we connect multiple instances?
The GoodN64 dump of the Game Booster (Game Boy 64 + Super Mario 3 (PD)) merely has the GameBoy cart mapped to the end. Runs fine in MAME. IIRC I swapped the rom with Pokemon Red and it ran "fine".
I was thinking of the cart itself would need a to be a slot device
If we can get a public list of what is known dumped and not added yet, we can extend the undumpedwiki to match MAMEs scope