The ilo virtual computer. This is mostly used with Konilo, a Forth based computing system.
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   crc's _ _
        (_) | ___
        | | |/ _ \  a tiny virtual computer
        | | | (_) | 64kw RAM, 32-bit, Dual Stack, MISC
        |_|_|\___/  (c) charles childers


This is ilo, a little virtual computer. ilo is mostly used with Konilo, a personal computing system written in Forth.

A brief overview:

  • 65,536 memory locations ("cells")
  • 32 bits per cell
  • block storage device
  • stack based architecture
  • minimal instruction set (30 instructions)
  • easy to implement and exend

This supports a variety of host architectures. Precompiled (mostly static) binaries are included for Linux, OpenBSD, NetBSD, FreeBSD, MS-DOS, macOS, Haiku, Classic Mac Systems 5-7, and Windows. It has been tested and confirmed to work on x86 (8088+), amd64, arm64, and 68000 processors. Physical RAM requirements are around 384K.

In addition to the provided binaries, many implementations of ilo are included. These include Assembly, C, C++, C#, Common Lisp, D, Go, Hare, JavaScript, Kotlin, Lua, Nim, Python, RetroForth, Rust, Swift, and TypeScript.