I've spent many hours reverse-engineering the code myself. It is my all-time favourite arcade game, and ever since I got into emulation in the early 90's I've wanted to RE Xevious just to see how it worked - and to reveal all its secrets. I started a few years back but stalled, only more recently making a more determined effort to finish it off. I plan on releasing the listing(s) when it's complete.How do you obtain the Xevious code. Can you decompile or is that just available somewhere?
Fun fact; there's a sol tower (citadel) in the map that doesn't appear in the game due to a bug. I found it when I decoded the map data, thinking I'd found one that no-one else had documented, but alas it's not in the game. Tracked down the bug and it's essentially unfixable without changing where it appears.
I could probably at least double the detail in the Namco Wiki entry on Xevious too...
The RE is about 97% complete; I couldn't help myself and started coding before I finished it. The rest will probably be done on an as-needed basis as I do the transcode. Just yesterday I came across a few routines that I hadn't done that I needed for the Neo Geo.