Show HN: Our space game has a built-in RISC-V emulator that runs Linux

summary

The space game SEEDS features an in-house RISC-V emulator written in Object Pascal called PasRISCV that executes real Alpine Linux binaries. The emulator uses a hybrid interpreter and tracing JIT compiler to support RV64GC, vector extensions, and full virtual hardware including block devices, graphics framebuffers, and retro sound cards. Communication between the virtual machine and the game engine happens via Linux vsock and custom binary serialization. The developers released PasRISCV, its companion emulator, and their custom game engine as free open-source software.

key points

1. PasRISCV is written in Object Pascal and uses a hybrid interpreter with a tracing JIT compiler that handles about 99% of x86-64 instructions.
2. The emulated environment runs Alpine Linux, communicating with the game engine via Linux vsock and a fast binary serialization format.
3. The system emulates full virtual hardware including VirtIO/PCIe storage, framebuffers for retro shader processing, and legacy FM synthesis sound cards.

who should read it

Game developers, emulator authors, and systems programmers interested in virtualization and custom in-game computing environments.

discussion warm