Hello David I saw your posting on the cctalk mailing list regarding RSX180.
It is Hector Peraza that's been tinkering with this. He intends making the full source-code available via SourceForge or GitHub but is still working on preliminary web pages and documenting etc. No doubt he will provide you with more details. I've been tinkering with a Z280 system designed by Bill Shen (the Z280RC on the RetroBrew web site at https://www.retrobrewcomputers.org/doku.php?id=builderpages:plasmo:z280rc ) and have contacted Hector about porting it to the Z280. A Z180 system is also on my hobbyist "to-do" list. Should you decide to produce another run I'd be interested in one. Most likely I'd use a CompactFlash on IDE interface and an GoTek style floppy emulator with it. -- Tony Nicholson <tony.nichol...@computer.org>