Minecraft HDL, an HDL for Redstone
13 comments
·October 30, 2025Arch-TK
This is an amazing timeline. I still remember the day redstone was added to Minecraft. I spent the entire evening and many days afterwards on the forum brainstorming how to implement various things. I think I had one of the first if not the first T flip flop, it "took an entire room" and was slow. It has been crazy watching things get compacted, repeaters getting added, pistons, comparators. I remember when BUDs got discovered and then eventually just added as a block.
Now* we have an entire HDL.
I honestly stopped keeping track of things around 2012 so I am completely lost looking at modern redstone contraptions.
*8 years ago
Dylan16807
This is a cool tool but compared to modern redstone contraptions this is a sidegrade, not an upgrade. It's straightforward torch and dust logic, with each torch being a nor gate and dust being wires. And it doesn't consider timing at all. This could have been made the week redstone was added (with minor adjustments to not have repeaters), and it wouldn't have taken any newer insights.
eirikbakke
In case anyone needs a minimal CPU implementation in 65 lines of Verilog: https://people.csail.mit.edu/ebakke/fic/ https://people.csail.mit.edu/ebakke/fic/code/Fic.v
(I wonder if it would convert cleanly to a redstone circuit...)
lpribis
This compiler does not support sequential logic, meaning no flip flops/registers.
paulwetzel
Super cool project :) Just the right level of, objectively useless - but really fun!
8note
Optimizing passes for this would be interesting.
Describing a flip flop as a villager minecart with some number of NaN minecarts beside it seems challenging to pick when to use it vs a copper bulb.
gatane
Amazing project!!
throwaway290
Minecraft circuits can't have feedback? That's pretty sad:(
melncat
They can. It's just that this specific program is not capable of translating it.
sodikidos
[dead]
Sweepi
> A 2-bit 7-segment display decoder in action (the display itself was not generated by MinecraftHDL)
Lame!(/s) I did this vanilla Minecraft(1.12?), including the display itself.
lesser-shadow
[dead]
Related:
Verilog to Minecraft Redstone Synthesizer - https://news.ycombinator.com/item?id=25195802 - Nov 2020 (12 comments)
(Reposts are fine after a year or so! https://news.ycombinator.com/newsfaq.html)