On Fri, 4 Aug 2017, systems_glitch via cctalk wrote:
Indeed, you'll need 2.25R if you want to use some Ross HyperSPARC modules. I don't know if the ROM image is available on the Internet nowadays, but I've got a 2.25R ROM in one of my SS10s, I could dump it for you if you can't find it elsewhere.
There's a Ross 2.25r image on this page: http://home.earthlink.net/~reif/ Not sure if it's the right one for a SS20. Mike Loewen mloe...@cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/