Devine Lu Linvega's journal

2023-05-28 Road to Strange Loop

My talk proposal to the Strange Loop conference has been accepted!

• Implemented Dad's Puzzler, in Uxntal.
• Added interface controls to Varvara's Bicycle.
• Drew an illustrated interpretation of the Merveilles logo.

2023-05-12 Type Inference Week

For a few weeks now, I've been sketching the basis for a type inference system for Uxntal. I first came across one when writing Factor, and I've been meaning to make my own since after reading Rob Kleffner's talk notes. I had a sense of what the different constructions were, but writing a type-checker helped drawing clearer lines between the different patterns.

We're casting off for Desolation Sound in a few days. Most afternoons are spent stocking up Pino with enough food to last us until we make our way back south next autumn. I'm eager to depart.

• Implemented type-inference in Uxntal.
• Resuming work on proof-reading Wiktopher.
• Wrote a little falling sand, simulator.
• Enjoyed Conal Elliot on elegance and beauty in computation.

2023-05-01 Concurrent All The Things

I recently watched David Ungar's Everything You Know About Parallel Programming Is Wrong talk, which lead me to read Tony Hoare's Communicating Sequential Processes, after which I felt inspired to consider parallel computing once more, and soon found myself taking a little detour to play with the OCCAM programming language, and revisit threads in Uxn.

As a little side-project, unrelated to threads, I made a pixel-perfect implementation of the classic Macintosh Note Pad application, so I could keep notes throughout the day and that turned out to be a fantastic aid to collecting passing thoughts. While building it, I also had a chance to implement text-wrapping in a project with very few moving parts and better understood how to handle text selection, where the boundary of a selection ends up being before the original anchor, and implemented it in Left.

• Ported the classic Macintosh Note Pad application to Varvara.
• Enjoyed Ramsey Nasser's Causal Islands 2023 talk.

2023-04-22 Structured Editing

These past few months, I've explored playful things to do with programming that might not directly serve a purpose, or at least, one wouldn't come across them without seeking them out specifically, and I've collected some of those seemingly useless, ideas into a talk and submitted it to the Strange Loop conference happening in September.

Also, while I consider Beetbug to be a kind of disassembler, I wanted to see if I could build something that would let me go from a source file to an assembled rom, and back again. I figured that being able to recover a project from a rom and its symbols file has important potential in terms of data preservation. To make this possible, I modified the symbols file to include comments, and was able to complete the back and forth I wanted.

This allowed me to experiment with something called structured editing, in which you modifying the underlying structure, symbols and bytecode of a program, and not its structural representation.

• Added an interactive mode to Drifblim.
• Started building a reassembler.
• Added a type port to the Varvara Console device.

2023-04-05 Interaction Nets & Oquonie

The past two weeks have flown by, between finishing Oquonie and preparing Pino for the summer, each day I fall into bed completely exhausted. But the game is nearly finished now, there are fewer and fewer bugs, and most of my time is spent doing optimization.

I've been diving into Interaction Nets again, and I've fallen head over heels with Sato's Inpla language, the code is a nightmare but I feel that with a bit of work, and a better division between the interpreter and virtual machine, this could turn out to be something very fun.

After watching Alan Kay's OOPSLA 1997 talk, I went and read Smalltalk-80: Bits of History, Words of Advice and I've been fascinated with it. It goes in details about their approach to the implementations of the Smalltalk VM, and the challenges to getting the ST-80 image to boot on all these different platforms.

• Discovering new things in Uxntal.
• Rewrote Bicycle to be a companion application to Left.

2023-03-13 Residency at Biosonic

Spent the week at the LEÑA residency collaborating with audio-visual artists. They call it a retreat, but really, I returned from Galiano more exhausted than when I left. It was well worth it tho, as I rarely allow myself to play music for more than an hour or two at a time.

I've had a bit of time to kill between rehearsals, and whenever I had a few minutes to myself, I'd pour over the Lisp Machine memos. It occurred to me that the byol-type books really ought to teach about targetting Lisp architectures(or at the very least, something in the vein of SECD abstract machines), instead of implementing Lisp on top of imperative languages, which does a disservice to the entire exercise.

• Preparing slides for our talk at Biosonic.
• Implemented the Hilbert Curve fractal.
• Returned image support to Left.
• Added the Hundred Rabbits splash to Donsol.

2023-03-03 Preparing for Biosonic

I've been progressing on Oquonie, implementing sounds and making sure that it runs as smoothly as possible on as many different platforms as I can. This meant revisiting a lot of the implementation details. The month has flown by, but it has been a lot of fun learning about optimization.

I will be staying on Galiano for a week during the Biosonic residency, it has been a while since I've last slept on firm ground.

• Preparing slides for our talk at Biosonic.
• Wrote a faster Uxn core.

2023-02-24 Oquonie is nearly ready

The weather has been absolute garbage and so has been a great help in advancing the Oquonie port. Not only is the project pushing Uxn further than it previously ventured, but it is equally pushing the tools used in its creation. The building of the game has had me do some significant improvements to Drifblim, Uxnlin, and Left.

• It looks like Oquonie will make its way to the Playdate.
• Played a set at the Lovebyte Party.
• Added a REPL mode to Beetbug.

2023-02-07 Oquonie is happening!

After putting together a demo of what a Varvara implementation of Oquonie could look like, Rekka and I decided to officially port it. It's a lot of fun to revisit this little universe. I hope that we can bring the essence of the original into the redux version.

• Spared some time to fix a handful of issues in Orca.
• Spent nearly every waking moment working on the Oquonie prototype.

2023-01-20 Function Stacks

I've been reading about reversible computing and put together a playground that allows me to experiment with the ideas of psi-lisp. This whole business of time reversible logic feels like visiting an old friend.

Meanwhile, I've also tried to bring potato to a usable state, which means that for it to entirely replace the current launcher, it should be able to assemble and run the assembled rom, a state to which I am inching closer.

• Finally found a use for the 3 unused uxn opcodes.
• Rewrote the javascript REPL implementation.
• Could I possibly port Oquonie, to Uxntal?

2023-01-08 Pino Rewiring

Since the turn of the year, we have spent every waking hour rewiring Pino, it has been a more challenging project than we had hoped but we will sleep soundly knowing that each connection has been well made.

I've read Koopman's Stack Machines: The New Wave and it inspired me to experiment with other virtual machine designs, namely that of the NOVIX NC4016. But after two weeks of experiments, I returned to writing Uxntal, partly because I do not feel limited in the realization of my ideas with my current stack, and partly because these sort of systems make for extremely obfuscated assembly languages. That being said, I can't seem to shake the craving to experiment with the Setun-70..

• Chose a new metadata format and implemented it.
• Revamped the mirrors.