Hi! I'm Jonas Hietala, a writer, developer and wannabe
code monkey.
Say hello, or keep reading.
Posts
Series
Let's build a VORON Trident
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?'
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
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
Why Cryptocurrencies?
I self-published a book! It tries to explain what cryptocurrencies are, what they’re useful for, and why they exist in a very approachable manner. It exists in physical form, as a free eBook and it’s readable online. The book on the website is created with Pollen and Racket.
T-34 Keyboard layout
I made a custom keyboard layout, designed for a keyboard with 34 keys. It’s been a fun project but it’s also helping me relieve my RSI.
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.