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Digital Logic Sim

​A minimalistic digital logic simulator · By Sebastian Lague

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276
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
276 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
29 replies
9,640 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
7,797 views
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 7 days ago
40 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 21 days ago
2 replies
114 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 16 days ago
3 replies
160 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
9 replies
1,329 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 50 days ago
1 reply
147 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
2,351 views
I think it would be incredibly useful to have an ' explode ' toggle that temporarily reveals the internal wiring of cust...
started by SammySanx 31 days ago
65 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
454 views
Tried Version 1 and that worked just fine.
started by crashandflow Apr 19, 2025
2 replies
241 views
pulses appear to be a lot longer than one tick and i need a one tick pulse
started by tttoby 80 days ago
2 replies
265 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
665 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 69 days ago
3 replies
230 views
2 replies
285 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
251 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 69 days ago
2 replies
158 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
876 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 77 days ago
92 views
No replies yet
Its less of crashing and more of not starting at all? If this is a known issue please help me!
started by imdevXD 77 days ago
40 views
No replies yet
Gates are fun when you are starting out in digital stuff, but if you want to step up your game, you'll gonna need to lea...
started by Arnadath 95 days ago
8 replies
636 views