Originally Posted by hap
http://seanriddle.com/starfox1.html
It's decapped, 'raw' ROM has been verified and I did look into it for a bit, a year ago. SM530 disassembler was added to MAME, but since ROM column/row layout is unknown, it's very hard to reverse engineer.

https://og.kervella.org/starfox/

s.bin is the decoded rom, sfx.c is the generating program. Result seems reasonable.

OG.