scamp-cpu

Re the text editor, when I was writing an editor for my homemade CPU I used the one from this tutorial: https://viewsourcecode.org/snaptoken/kilo/index.html - it is 1000 lines of C. Might be useful to you. I have diverged a bit from the tutorial because I didn't want syntax highlighting, I really wanted vi-style keybindings, and my environment is much more performance-constrained. Mine is at https://github.com/jes/scamp-cpu/blob/master/sys/kilo.sl (in my made-up programming language).

I don't have a great single resource unfortunately. I'd like to put up a web page about it at some point. This is the github repo that contains everything: https://github.com/jes/scamp-cpu/ - some of the stuff under "doc/" might be what you're after (but some of it is just incoherent ramblings). I have some blog posts here: https://incoherency.co.uk/blog/tags/cpu.html And there is a video here, but it's not really very informative: https://www.youtube.com/watch?v=4sBB0iD6XvI

This is really cool and unique. I poked around a bit, and the kernel is vaguely POSIX like, but written in a homegrown language with a compiler written in Perl[1]. [1] https://github.com/jes/scamp-cpu/blob/f260f52d950be90c2279f5...

Hi, I'm the author. Thanks for posting this! If anyone wants to read more about this project, you might enjoy the "cpu" tag on my blog: https://incoherency.co.uk/blog/tags/cpu.html or the "doc/" directory in the git repo: https://github.com/jes/scamp-cpu/tree/master/doc The latest state is that I have now got the UART and CompactFlash card working, and have booted up the kernel all the way to the shell, at 1 MHz, and it is close to fast enough to use interactively.

Also the repo is here: https://github.com/jes/scamp-cpu

Thanks, this is serendipitous timing. I definitely plan to watch the YouTube playlist. I'm designing a simple CPU at the moment[1] and one of the things that keeps me awake at night is thinking about how to make a compiler for it. It only supports 64K words of RAM (and I'm not planning to implement bank switching), and I definitely want the compiler to be self-hosting on my CPU, so retargeting LLVM or similar won't be applicable. I've looked at Small-C[2], Cowgol[3], and PL/0[4] which all target related goals, from different directions. [1] https://github.com/jes/scamp-cpu [2] https://en.wikipedia.org/wiki/Small-C [3] http://cowlark.com/cowgol/ [4] https://en.wikipedia.org/wiki/PL/0