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Digital Logic Sim

​A minimalistic digital logic simulator · By Sebastian Lague

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281
Topics

Recent updates

Version 2.1.6
27
22
Change Log: Added a Buzzer chip for creating sounds. This has a 4-bit volume input, and an 8-bit frequency input. The frequency range is from 27.5 to 3729.3 Hz...
3 files
Version 2.1.5
8
14
Change Log: Small improvements to simulation performance Minor reduction in simulation memory usage LED colour can now be changed from context menu (right-click...
3 files
Version 2.1.4
14
Change Log: Added keyboard shortcut to pause/unpause the simulation with Ctrl + Space Advancing a single step while paused is now down with the Space key Added...
3 files
Version 2.1.3
8
16
Change Log: Added an Undo/Redo system (ctrl+z, ctrl+shift+z) Note: this does not affect menu actions (such as creating collections, starring chips, etc). Added...
3 files
Version 2.1.2
5
16
Change Log: Added hex colour input field to chip customization menu Fixed chip 'save as' incorrectly overwriting uses of the original chip Fixed bug where you c...
3 files
Version 2.1.1
7
8
Change Log: Duplicating chips (with shift+D) now includes the connected wires Fixed thread conflict that could sometimes cause simulation to stop working when e...
3 files
Version 2.1.0
1
12
Note: I've set the version to 2.1.0 because this update contains bug fixes relating to the core simulation. It's therefore possible for the behaviour of some ch...
3 files
Version 2.0.4
6
12
Change Log: Improved wire editing controls (insert/delete wire points, and show grid while snapping) Fixed bug where collection name input field couldn't be bla...
3 files
281 topics · Next page
Topic
Last post
A few frequently asked questions I've seen (will add more later). Last updated for version 2.1.6 Where are the AND and N...
started by Sebastian Lague May 12, 2025
32 replies
11,227 views
Hi everyone, I was thinking it might be fun to have a playlist on youtube to showcase different things that people have...
started by Sebastian Lague Apr 17, 2025 Last page
95 replies
8,119 views
I made this cool app so please check it out
started by Z4597 15 days ago
129 views
No replies yet
Im new to the simulation but when trying to make an OR gate a situation like below happened and the out rapidly flashes...
started by Wolfipt 22 days ago
2 replies
128 views
It's based off the LEG from the game "Turing Complete." The program I wrote is made using customasm. It took over 2 minu...
started by Perodactyl Apr 14, 2025
10 replies
1,743 views
Hello, I'm trying to build CPU but I encountered a problem with registers, due to some factors my SR latches (build from...
started by mlekolak22 36 days ago
1 reply
129 views
Can we get 16 bits and 32 bits bus lanes? would be nice to experiment higher bus lanes arhitecture and other stuff, i ha...
started by Kapran 37 days ago
4 replies
177 views
https://drive.google.com/file/d/1MOnsZyEKbRsLgFg-WznRww42ekQlsSqY/view?usp=drive... C:\Users\Bendy\Desktop\Office\dist\w...
started by Bendy509 37 days ago
116 views
No replies yet
If there is a warning saying that "this application cannot be opened" on Mac when attempting to download the software, i...
started by william-Han-0 45 days ago
102 views
No replies yet
It would be useful to add so that once you submit a chip, you can edit the customization later because I made a mistake...
started by Mort00 59 days ago
2 replies
161 views
I'm new to this software and I finished watching a tutorial on how to make a CPU that can carry out basic operations and...
started by GDMCAlex_I 54 days ago
3 replies
243 views
Whenever I exit my project, it says your chip has unsaved progress. But I don't want to save it has a chip. I have tried...
started by Nathan Henry 88 days ago
1 reply
176 views
hi im making a unofficial discord server for this game: https://discord.gg/bPVG8MkMt9 we have over 200 people in it righ...
started by adamindibiemiravci Apr 14, 2025 Last page
30 replies
2,494 views
I think it would be incredibly useful to have an ' explode ' toggle that temporarily reveals the internal wiring of cust...
started by SammySanx 69 days ago
88 views
No replies yet
Hi! I've been looking for a bit and can't find anything on this. In the video on 7-segment displays , it seems like ther...
started by juliagairn Apr 29, 2025
5 replies
500 views
Tried Version 1 and that worked just fine.
started by crashandflow Apr 19, 2025
2 replies
256 views
pulses appear to be a lot longer than one tick and i need a one tick pulse
started by tttoby Oct 16, 2025
2 replies
291 views
so when i download app i have just a nand gate. Can someone tell me how to add other basic gates?
started by Majofer1352 Aug 19, 2025
2 replies
730 views
Hello, I am kinda new to this, and tried my luck with your programming. I want to start with some simple 8 bit addition...
started by thijsvd23 Oct 27, 2025
3 replies
272 views
2 replies
309 views
i used roms for my 4-bit adder chip, and it did 1,000,000 operations per second, i think my original did 384000. i also...
2 replies
276 views
Recently, I lost a game of tic tac toe I made because I couldn't save my project. It's still there in the projects tab b...
started by Nathan Henry Oct 27, 2025
2 replies
171 views