I was looking through the MAME source and I saw Conic Basketball hadn't been emulated yet. I got that almost a year ago and dumped the ROM, but didn't upload the info - oops. It is the same chip as in Tandy Sports Arena, but that one has an additional switch to select between Basketball, Hockey and Soccer.

Here are the overlay scans: http://www.seanriddle.com/sportsarena.jpg