ABSOLUTE ASS

A computer! Our features:

• A compact and uniform 16-bit instruction format
• A pleasant RISC load-store design, we think, we're not really sure as while we are educated, we are still so ignorant.
• Word-size agnostic. Want a 4-bit CPU? Go for it! 64 bit? Sure!
• A suite of poorly-tested implementations that occasionally make their way onto an FPGA
• A generalized bitwise instruction that can perform any of the 16 2-input boolean functions

Planned features:

• Memory protection scheme
• Interrupts and I/O interfaces

Here you'll find...

• doc, with a specification of the instruction set as well as a description of the calling convention.
• myhdl, an implementation in MyHDL (surprise!) of a core.
• spinal_ass, an implmentation in SpinalHDL of a core.
• src, an outdated partial implementation in Chisel of a core.
• assrs, an emulator in Rust that also has some utilities such as a disassembler and instruction encoder
• assembler, an assembler in MoonScript that supports labels and a few handy instruction aliases like "LI" to load immediate.