This repository hosts the sources and utilities to build a datapack that boots a very minimal Linux image in vanilla Minecraft.

Written against Minecraft 1.20.6.

Its a RISC-V I+M+A+Zicsr+Zifencei emulator written in cbscript, a scripting language that compiles relatively normal code to a set of minecraft command functions and places them in a datapack.

Data is mostly stored in scoreboards scores. Scoreboard score values are 32-bit signed integers. Additionally, minecraft allows some operations on these scores, which allows "relatively" efficient implementation of the emulator. There are only a few operations though, so most of the other ones (bit operations, 64-bit multiply, division, etc) are emulated.

Memory is stored in minecrafts data storage. There is a B-tree of 3 levels of 256 elements, each cell a 32-bit value.

Vortex is a full-stack open-source RISC-V GPGPU. Support RISC-V RV32IMAF and RV64IMAFD. Configurable number of cores, warps, and threads. Configurable number of ALU, FPU, LSU, and SFU units per core. Configurable pipeline issue width. Optional local memory, L1, L2, and L3 caches. OpenCL 1.2 Support.

Supported FPGAs: Altera Arria 10 and Stratix 10, Xilinx Alveo U50, U250, U280, Xilinx Versal VCK5000.

The Selfie Project provides an educational platform for teaching undergraduate and graduate students the design and implementation of programming languages and runtime systems. The focus is on the construction of compilers, libraries, operating systems, and virtual machine monitors. The common theme is to identify and resolve self-reference in systems code which is seen as the key challenge when teaching systems engineering, hence the name.

Selfie is a self-contained 64-bit, 11-KLOC C implementation of:

• a self-compiling compiler called starc that compiles a tiny but still fast subset of C called C Star (C*) to a tiny and easy-to-teach subset of RISC-V called RISC-U,
• a self-executing emulator called mipster that executes RISC-U code including itself when compiled with starc,
• a self-hosting hypervisor called hypster that provides RISC-U virtual machines that can host all of selfie, that is, starc, mipster, and hypster itself, and
• a tiny C* library called libcstar utilized by selfie.

Selfie generates ELF binaries that run on real RISC-V hardware as well as on QEMU and are compatible with the official RISC-V toolchain, in particular the spike emulator and the pk kernel.

Opensouce RISC-V implemented from scratch in one night!

lowRISC is an open source RISC-based system-on-a-chip and accompanying development board. Based on the 64-bit RISC-V instruction set and architecture. Designed to be a fully open source and very low cost general purpose computer.