Hi! I'm Jonas Hietala, a writer, developer and wannabe code monkey.
Say hello, or keep reading.

Posts


Let's create a Tree-sitter grammar

Let's build a VORON: Wrap-up

Let's build a VORON: Major failure

Let's build a VORON: Noise

Let's build a VORON: More mods

Exploring the Gleam FFI

Rewriting my Neovim config in Lua

Battling burnout

Rewriting my blog in Rust for fun and profit

How I wrote a book using Pollen

Series

Let's build a VORON Trident

completed

This series documents my journey building my very first 3D printer: a VORON Trident 250.

I’m not a 3D printer expert—in fact I’m a complete beginner and I’ve never even held a 3D printed part in my hand before—so don’t expect any deep insights from this series. Instead I’ll try to document my progress, write about problems I encounter, contain lots of pictures, and will hopefully end with an awesome printer.

How I wrote 'Why Cryptocurrencies?'

completed

This series documents how I wrote, designed and self-published the book Why Cryptocurrencies?. It includes how I approached the writing process, how I made it available to read online, how I designed the layout of the physical book, and how I turned it into an eBook.

The T-34 keyboard layout

completed

In this series I document my journey in developing a custom keyboard layout for a smaller keyboard. It contains pictures, graphs and ideas that have been fun and helpful for me.

Projects

MARC

This is a VHDL implementation of the Core Wars 88 standard. Core Wars is a computer game where two programs compete and try to destroy each other.

The programs may look like this:

; This program will copy a DAT instruction to every 4th line in the memory,
; hoping to catch enemy processes and kill them off.
;
; add 4 to the instruction at offset 3 (the DAT)
ADD #4, 3
; copy the instruction at offset 2 to relative location of
; the second field of instruction 2 (+4 lines after DAT the first execution)
MOV 2, @2
; jump back to beginning
JMP -2,0
; if a process tries to execute this line, it dies
DAT #0, #0

See the Core Wars wiki for more info.

Games

Some fast game prototypes. Most were made in 7 days or 48 hours.