# Collapse OS documentation ## User guide * [The shell](../apps/basic/README.md) * [Load code in RAM and run it](load-run-code.md) * [Using block devices](blockdev.md) * [Using the filesystem](fs.md) * [Assembling z80 source from the shell](zasm.md) * [Writing the glue code](glue-code.md) * [Understanding the code](understanding-code.md) ## Hardware Some consolidated documentation about various hardware supported by Collapse OS. Most of that information can already be found elsewhere, but the goal is to have the most vital documentation in one single place. * [TI-83+/TI-84+](ti8x.md) * [TRS-80 model 4p](trs80-4p.md)