Beaten on real hardware! Great job!
A few notes regarding `mainBankZero_llvm-mos.smc`: it was missing a few things that kept it from working on certain flash carts. Namely, it was initially detected as HIROM (and shows as "Unknown" in Advanced SNES ROM Utility), and it was missing a title and a header as well. Some flash carts (not fxpak) have issues with ROMs that don't have everything in order. Manually adding the data via ASRU fixed it.
Yeah, I play fast and loose with headers, my calypsi header was also incomplete until someone pointed it out, thanks for testing and pointing it out though, I'll fix my llvm-mos builds accordingly! Really a side effect of me treating ROMs as a formatted code+data dump as opposed to like an actual format for shipping code