npub1qvhrpeerrs44f5e7v8vjvd5pjt0zgaeh3jjnd6d7jdtgr22wv5lqzn8mxr (npub1qvh…8mxr)
I'm not sure what those ROM packs are for. The 8201 had something similar that gave you an extra 32k for file storage. I assume this is similar but I've never had the chance to play with an 8500.