https://twitter.com/forestillusion/status/1126321691775229954 https://archive.org/details/SegaManuals I took a look at the docs, and I saw that there were previously missing tech docs and other good stuff in there, including an official doc for the SSF2 mapper, and missing tech bulletins for Genesis and CD. Well, at least, I haven't seen them elsewhere before. Reading through there, it seems that it was possible that SMPS was actually called Sega Music Format.