I can only get one hit for this on Google and it's about a Gamegear devkit. My reason for curiosity is that in every official MD SDK, which use the SNASM* tools, Z80 code is ALWAYS in MD dc.b form or a binary, NEVER source, not even in the GEMS SDK, a full blown Z80 based kit. So, my question is, was there ever a SNASMZ80?