If we stretch the bounds of "are there", there's the Clever-ISA project, which right now AFAICT is mainly just a WIP spec [0] and an emulator [1]. [0] https://

If we stretch the bounds of "are there", there's the Clever-ISA project, which right now AFAICT is mainly just a WIP spec [0] and an emulator [1]. [0] https://github.com/Clever-ISA/Clever-ISA https://github.com/Clever-ISA/Clever-ISA [1] https://github.com/Clever-ISA/Clever-ISA-Emu https://github.com/Clever-ISA/Clever-ISA-Emu