Kartik Agaram @akkartik@mastodon.social

*Update on the Mu computer*

A few days ago I found out about a hobbyist OS called Soso: https://github.com/ozkl/soso

Today I've gotten Mu running on it well enough to make it a first-class supported platform alongside Linux.

https://github.com/akkartik/mu#readme

LoC of C I depend on thus goes down from 12M to 33k.

It's not a complete replacement, though. I still plan to work with Linux, particularly for its networking support. But it's *so* cool to have a minimal stack supporting graphics!

@vertigo @rain

*Update on the Mu computer*

Syntax sugar for function calls is done. Here's factorial with no sugar, addressing modes and function calls, respectively.

Time now to start building a proper language, to occupy C's niche on this new stack. Type-safe, memory-safe, manual (but safe) memory management, manual (but safe) register allocation.

Though I might build a toy Lisp first. I figure I've earned some fun. Seeing a computer boot into a REPL would qualify.

https://github.com/akkartik/mu#readme

@rain @vertigo

How SubX code has evolved over the past year

2018/Jul/30: https://mastodon.social/@akkartik/100465178801596605

2019/Sep/03: http://akkartik.name/images/20190903-calls.subx.html

The first thing that pops out is that lines have gotten narrower.

Or have they? Scroll down and some long lines start to show up. Even if you ignore trailing comments. Check out the screenshot. Lines wider than 80 characters translate to 2-byte jump instructions. I wonder if I've lost my sense of proportion somewhere along the way.

@rain @vertigo

*Update on the Mu computer*

Now that we have a notation for addressing modes, we're designing syntax for function calls.

It's easiest to parse if we start with a paren and avoid commas. However, the similarity to s-expressions is only skin deep. There can only be 2 levels of parens, and args can't do arbitrary arithmetic.

Pseudocode: http://akkartik.github.io/mu/html/apps/calls.subx.html
Uses the just-created addressing mode notation! (https://mastodon.social/@akkartik/102681693471237779)

More info: https://github.com/akkartik/mu#readme

@rain @vertigo

More deletions later, LoC in my fork of the Linux kernel are down from 27.1M to 12.3M. Goal is to only support lowest-common-denominator devices.

https://github.com/akkartik/mu#readme

(My line-counting was way off earlier in this thread.)

Reason #83 to fork open-source projects

You get to see your name and picture on a git log alongside luminaries like Linus Torvalds.

https://github.com/akkartik/kernel#readme

@vertigo 😄 at the Mastodon -> Twitter -> Mastodon loop

cc @datatitian

Here's before and after screenshots for factorial.subx.

cc @rain

(project link: https://github.com/akkartik/mu#readme)

*Update on the Mu computer*

Now that we have a bootstrapped (quasi-) language[1] and (kinda) bootstrapped OS[2], we're finally starting to think about less error-prone notations.

This week two of us built a notation for x86 addressing modes:

direct: %ecx
indirect: *ecx
indirect with displacement: *(ecx+4)
indirect with index, scale and displacement: *(ecx + edx<<3 + 4)

Not yet sure this is a good approach. But it'll be fun to playtest.

[1] https://mastodon.social/@akkartik/102495274992610155
[2] https://mastodon.social/@akkartik/102583218576725159

@wxcafe @vertigo `grep -a`?

@kusuriya These days I click 'Reader View' the moment something pops up.

@mdhughes Try my example on zsh before you say that 😂 😂 😂 😭 I use zsh as well, but there's a reason my original toot said "shell".

@kingcons @rain @alcinnz @carbontwelve @someonetellmetosleep @hirojin @grainloom @gcb