I had some luck with G&W Boxing- I can dump 1 page of 63 bytes. Just 43 more pages to go! (Or maybe 63 if it's an SM511). If I fiddle with some of the inputs right after reset, I can switch pages, but I haven't figured out the exact steps yet.
Gradius is pretty much just like Top Gun, TMNT and Contra. Tiger Marble Madness looks like it's an SM512 because there are a lot more segments.
