Alas that the j-core kind of dried up development. There was a roadmap for this open super-h compatible core up to sh4 then a 64 bit version. Kind of tied to key patents expiring.
There's a j32 & j32smp core now, but I'm not sure where-ish that would slot into the old roadmap, and it seems like development isnt active. https://j-core.org/roadmap.html
Meanwhile support keeps bitrotting. Someone managed to get a Debian port going in 2015, & it sounded semi adventurous to make go. https://lwn.net/Articles/647636/
Chipmaker Renesas - who kind of was super-h for a while - meanwhile seems to be starting down the RISC-V path, alongside a variety of ARM cores & their own (small microcontrollers) RL78 architecture that I don't know much about. https://www.cnx-software.com/news/renesas/
There's a j32 & j32smp core now, but I'm not sure where-ish that would slot into the old roadmap, and it seems like development isnt active. https://j-core.org/roadmap.html
Meanwhile support keeps bitrotting. Someone managed to get a Debian port going in 2015, & it sounded semi adventurous to make go. https://lwn.net/Articles/647636/
Chipmaker Renesas - who kind of was super-h for a while - meanwhile seems to be starting down the RISC-V path, alongside a variety of ARM cores & their own (small microcontrollers) RL78 architecture that I don't know much about. https://www.cnx-software.com/news/renesas/