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MOVE: do not crash when u is 0 (#126) 
This commit adds ?DUP IF guards to MOVE and MOVE- that make them exit
when u is 0. Without these guards a DO loop was executed 65535 times
instead of 0.

In particular, this fixes a crash when "105 LOAD I " is executed
immediately after boot. Block editor word "I" passes IBUF length (0)
to MOVE- and MOVE in this case, causing a crash.
2020-06-21 05:49:45 -05:00
blk MOVE: do not crash when u is 0 (#126) 2020-06-21 05:49:45 -05:00
emul MOVE: do not crash when u is 0 (#126) 2020-06-21 05:49:45 -05:00
recipes pcat: it works! 2020-06-20 20:06:42 -04:00
tests Fix tests 2020-05-14 10:58:41 -04:00
tools Replace deprecated bzero with memset (#119) 2020-06-16 18:58:23 -05:00
.gitignore Tidy up 2020-05-03 12:54:22 -04:00
.gitmodules Move "emul" folder to root 2019-12-31 13:34:24 -05:00
.travis.yml Add travis support 2019-10-30 19:12:02 -04:00
CONTRIBUTING.md CONTRIBUTING: add note about typo PRs 2020-06-09 20:36:40 -04:00
COPYING Re-license to GPLv3 2019-05-08 20:18:05 -04:00
README.md Remove mailing list link from README 2020-06-09 08:32:55 -04:00
runtests.sh CI: don't needlessly run tests twice 2020-05-14 18:58:06 -04:00

README.md

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:

  1. Run on minimal and improvised machines.
  2. Interface through improvised means (serial, keyboard, display).
  3. Edit text files.
  4. Compile assembler source files for a wide range of MCUs and CPUs.
  5. Read and write from a wide range of storage devices.
  6. 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, doing so in an emulator is easy.

See /emul/README.md for getting an emulated system running.

Then, run 0 LIST for an introduction, follow instructions from there.

Organisation of this repository

  • blk: Collapse OS filesystem's content. That's actually where Collapse OS' source code is located. Everything else is peripheral.
  • 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.

Discussion

For a general discussion of Collapse OS and the ecosystem of technologies and ideas that may develop around it refer to r/collapseos

I also stick around on IRC (#collapseos on freenode).