Raspberry-Pi VS ChrysaLisp

I don't know x86, but I use ARM startup code called SmartStart by Leon de Boer that sets up everything for a Raspberry Pi before calling kernel_main (different models have different ARM CPU's and it handles the slight variations of each -- see SmartStart32.S for the 32 bit version and SmartStart64.S for 64).

For the Raspberry Pi I'd start with this "hello world" project . It gets you booted up, and control transferred to your OS in C starting at int main(). It provides printf functionality to the screen (and basic 2D graphics), access to many of the hardware registers, hardware timer and interrupts. Plus some global variables and functions relating to the system (made available in the .S startup loader).

Inspired by the TaOS Virtual Processor[0]:

"ChrysaLisp is a 64-bit, MIMD, multi-CPU, multi-threaded, multi-core, multi-user parallel operating system with features such as a GUI, terminal, OO Assembler, class libraries, C-Script compiler, Lisp interpreter, debugger, profiler, vector font engine, and more. It supports MacOS, Windows, and Linux for x64, Riscv64 and Arm64 and eventually will move to bare metal. It also allows the modeling of various network topologies and the use of ChrysaLib hub_nodes to join heterogeneous host networks. It has a virtual CPU instruction set and a powerful object and class system for the assembler and high-level languages. It has function-level dynamic binding and loading and a command terminal with a familiar interface for pipe-style command line applications. A Common Lisp-like interpreter is also provided."[1]

More HN discussion, with links to more discussion[2].

[0] https://news.ycombinator.com/item?id=9806607

[1] https://github.com/vygr/ChrysaLisp

[2] https://news.ycombinator.com/item?id=34415936

Thanks, this saved me some time. I was just debugging why the project I work on (LibHunt) hadn't logged the mention of https://github.com/vygr/ChrysaLisp on this post... the reason being - you've updated the URL after it was submitted.

I'll give another OS project to contribute to where the developers will help you a lot with your understanding of OS development: https://github.com/vygr/ChrysaLisp

One of the projects I've enjoyed working on in the past is: ChrysaLisp OS/Lang

It’s no grand work of coding but: https://github.com/vygr/ChrysaLisp/lib/date/date.inc

ChrysaLisp is portable assembler in () more than Lisp - any other Lisp system wouldn't have comments about clobbering registers.