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Digital Logic Sim

​A minimalistic digital logic simulator · By Sebastian Lague

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279
Topics

Recent updates

Version 2.1.6
26
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
279 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
30 replies
10,073 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
7,895 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
1,440 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 6 days ago
1 reply
55 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 8 days ago
4 replies
79 views
https://drive.google.com/file/d/1MOnsZyEKbRsLgFg-WznRww42ekQlsSqY/view?usp=drive... C:\Users\Bendy\Desktop\Office\dist\w...
started by Bendy509 8 days ago
42 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 15 days ago
60 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 29 days ago
2 replies
125 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 24 days ago
3 replies
188 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 59 days ago
1 reply
158 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
2,379 views
I think it would be incredibly useful to have an ' explode ' toggle that temporarily reveals the internal wiring of cust...
started by SammySanx 39 days ago
68 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
474 views
Tried Version 1 and that worked just fine.
started by crashandflow Apr 19, 2025
2 replies
244 views
pulses appear to be a lot longer than one tick and i need a one tick pulse
started by tttoby 88 days ago
2 replies
268 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
681 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 77 days ago
3 replies
246 views
2 replies
289 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
256 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 77 days ago
2 replies
162 views
Since I built my CPU with a costum ISA in DLS, I've literally been in love with my ISA, because I made it. Guess what? I...
started by virtual_matt Aug 21, 2025
11 replies
897 views
good day, 1) i wander how to calculate time-delay of a chip we only have a NAND gate for start, say it has delay 1, and...
started by daemonaaspb 85 days ago
96 views
No replies yet