a7dcb522c2
The 1 byte limitation has been effective for a while now, but I hadn't made the move yet, I wanted to see if the limitation would cause me problems. It doesn't. Doing this now slightly facilitates the IY->BC move in z80. Bootstrapping: if you try to recreate the CVM binary from the previous commit with this code, you'll have bootstrapping problems. The first bootstrap will compile a binary with 2-bytes wide cells but branching conditionals that yields 1-byte cells. That's bad. I got around the issue by temporarily inserting a "397 399 LOADR" instruction in cvm/xcomp.fs, right before the xcomp overrides. This way, I force 1-byte cells everywhere on the first compiliation, which then allows me to apply the logic change in cvm/vm.c and have a properly running binary. |
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|---|---|---|
| blk | ||
| cvm | ||
| emul | ||
| recipes | ||
| tests | ||
| tools | ||
| .build.yml | ||
| .gitignore | ||
| .gitmodules | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| README.md | ||
| runtests.sh | ||
Collapse OS
Bootstrap post-collapse technology
Collapse OS is a Forth operating system and a collection of tools and documentation with a single purpose: preserve the ability to program micro- controllers through civilizational collapse.
It it designed to:
- Run on minimal and improvised machines.
- Interface through improvised means (serial, keyboard, display).
- Edit text files.
- Compile assembler source files for a wide range of MCUs and CPUs.
- Read and write from a wide range of storage devices.
- Assemble itself and deploy to another machine.
Additionally, the goal of this project is to be as self-contained as possible. With a copy of this project, a capable and creative person should be able to manage to build and install Collapse OS without external resources (i.e. internet) on a machine of her design, built from scavenged parts with low-tech tools.
Getting started
Usage documentation is in-system, so access to documentation requires you to run Collapse OS. Fortunately, building and running Collapse OS on a POSIX environment is easy.
See /cvm/README.md for instructions.
Then, run 0 LIST for an introduction, follow instructions from there.
Alternatively, there's also Michael Schierl's JS Collapse OS emulator which is awesome and allows you to run Collapse OS from your browser, but it isn't always up to date. The "Javascript Forth" version is especially awesome: it's not a z80 emulator, but a javascript port of Collapse OS!
Organisation of this repository
blk: Collapse OS filesystem's content. That's actually where Collapse OS' source code is located. Everything else is peripheral.cvm: A C implementation of Collapse OS, allowing it to run natively on any POSIX platform.recipes: collection of recipes that assemble Collapse OS on a specific machine.tools: Tools for working with Collapse OS from "modern" environments. For example, tools for facilitating data upload to a Collapse OS machine through a serial port.emul: Tools for running Collapse OS in an emulated environment.tests: Automated test suite for the whole project.
Status
The project unfinished but is progressing well! See Collapse OS' website for more information.
Looking for the assembler version?
The Forth-based Collapse OS is the second incarnation of the concept. The first
one was entirely written in z80 assembly. If you're interested in that
incarnation, checkout the z80asm branch.