Limen processor was initiated in 2015 and was later used within my high school thesis. It uses 16-bit RISC core architecture with von Neumann memory architecture. It was written in VHDL (with tab size 3!) and tested on an FPGA (Digilent Basys 2). Significant characteristics:

• Smallest addressable unit is 2 bytes
• May address up to 128 KB of memory
• 8 x 16-bit general purpose registers (R0 is always 0)
• No status register for arithmetic operations
• Defines 8 instruction formats

The microarchitecture itself is rather simple and straightforward – no pipelining involved. Feel free to look around the source code!

Did you know that Limen Alpha is its dual-core successor?

If you are curious how the machine code of Limen looks like, browse the collection of such programs.

• support.md – questions, answers, help
• contributing.md – how to get involve
• license – author and license