@movq@www.uninformativ.de Right 😅

Fark me OS Dev is hard 🤣

@movq@www.uninformativ.de that’s just 🎁 🕯️.

@movq@www.uninformativ.de infinite interaction!

@lyse@lyse.isobeef.org Thanks!

Wow, as I anticipated, this is waaay out of my capabilities to really understand it. But I’m quite happy to just have spotted a mistake in an explanatory comment in section 4.5.2 “The icode Array”. Of course, it should be /e + tc + /i + ni + t\0. Let’s hope that my e-mail with the patch actually makes it into Briam’s inbox. I fear GMail just hides it in the spam folder.

@bender@twtxt.net gemini-cli, something something https://github.com/google-gemini/gemini-cli/issues/16723

I recently got an email with this byte sequence:

\xf0\x9f\x8e\x81\xf0\x9f\x95\xaf\xef\xb8\x8f

That’s U+1F381, U+1F56F, U+FE0F. The last one is a “variation selector”:

https://unicodeplus.com/U+FE0F

My toolkit renders this incorrectly – and so do tmux and GNU screen.

Unicode ain’t easy. 🥴

/me clones the repository, calls gemini-cli, and asks for an executive summary. Gemini-CLI replies “Don’t bother!” LOL.

@movq@www.uninformativ.de Just 323 pages! That’s cool, let’s have a look. :-)

@prologic@twtxt.net Tada! Maybe one day I might look into this lowlevel stuff, too. But I can’t see it on the horizon yet. Happy hacking! :-)

https://github.com/unix-v4-commentary/unix-v4-source-commentary

A comprehensive, line-by-line commentary on the UNIX Fourth Edition source code (released November 1973; tape recovered from June 1974 distribution).

@prologic@twtxt.net I’d love to take a look at the code. 😅

I’m kind of curious to know how much Assembly I need vs. How much of a microkernel can I build purely in Mu (µ)? 🤔

Can’t really answer that, because I only made a working kernel for 16-bit real mode yet. That is 99% C, though, only syscall entry points are Assembly. (The OpenWatcom compiler provides C wrappers for triggering software interrupts, which makes things easier.)

But in long mode? No idea yet. 😅 At least changing the page tables will require a tiny little bit of Assembly.

I’m kind of curious to know how much Assembly I need vs. How much of a microkernel can I build purely in Mu (µ)? 🤔

I’ve only got a handful of syscalls working right now. Taking inspiration from the calling convention of the Linux kernel and even made the service/interrupt handler int 0x80h 🤣 I’ve only got read, write, alloc and exit working righ tnow 🥲

@movq@www.uninformativ.de Yes!

Did you do the whole dance with BIOS boot and everything?

Yup! Fark’n LBA shit and all, loading up the GDT, TSS and switching to x86_64 long mode 🤣

@prologic@twtxt.net Damn, nice! I know exactly what you mean – the output/screenshot looks trivial, but there’s so much going on behind the scenes. 😃

Did you do the whole dance with BIOS boot and everything?

Whohoo! 🥳 You have no idea how great a feeling this is! This includes the Mu stdlib and runtime as well, not just some simple stupid program, this means a significant portion of the runtime and stdlib “just works”™ 🤣