hneemann/Digital
View on GitHub ↗ ★ 6,139 Java
A digital logic designer and circuit simulator.
16 mentions on Hacker News by 14 people: 4 stories, 12 comments · first 2020-01-10 · latest 2026-01-03
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I'm not the author of the post itself, but the 74181 chip seems to be defined in the simulator: https://github.com/hneemann/Digital/blob/master/src/main/dig...
comment by v9v · 2025-09-13 · in Weird CPU architectures, the MOV only CPU (2020) -
Theres the open source Digital ( https://github.com/hneemann/Digital ) which can run simulations but then export Verilog. If you have an ICE40 based GPU then in theory you can then use open source tools (like apio) to get that onto your…
comment by KallDrexx · 2024-04-04 · in Logik: Open-source FPGA toolchain by Zero ASIC -
…but got a Java run time error. Used the recommended JRT https://adoptium.net/ Wandered through the https://github.com/hneemann/Digital site and saw past issues with JRT but no obvious solution. I have a couple hundred GALs of same or…
comment by justtinker · 2023-11-10 · in How can I implement a simple asynchronous DRAM controller? (2018) -
…old WinCUPL or the even older DOS program that was used to do the synthesis back in the day. [0] https://github.com/hneemann/Digital
comment by mk_stjames · 2023-11-10 · in How can I implement a simple asynchronous DRAM controller? (2018) -
…just missing something or if that kinda of IDE doesn't exist in any open source tools just yet. [0] https://github.com/hneemann/Digital Edit- and yes I get that I'm probably just not used to the management of Verilog codebases and it's no…
comment by mk_stjames · 2023-03-05 · in Ao486_MiSTer: i486 core for the MiSTer FPGA gaming system -
…still seem to use it however (development ended in 2014). Perhaps its descendant is Digital? https://github.com/hneemann/Digital
comment by photochemsyn · 2023-02-10 · in Logic Gate Simulator -
I have been building a CPU using: https://github.com/hneemann/Digital Much faster than Logisim, UI a little clunky, but my CPU runs around 0.5Mhz and it has very nice peripherals like Telnet, graphics ram, VGA etc Terrible name that is…
comment by NathanWilliams · 2023-01-27 · in How a CPU works: Bare metal C on my RISC-V toy CPU -
This is a game. Should you want a digital logic simulator that's not a game, check out https://github.com/hneemann/Digital .
comment by tempodox · 2023-01-01 · in Digital Logic Sim -
Well logisim is dead, but evolution is a fork and then there's Digital https://github.com/hneemann/Digital which is I think a reimplementation of Logism's concepts? I also hand designed a custom 16 bit CPU in logisim, because I was…
comment by mrguyorama · 2022-07-29 · in I Designed My Own 16-Bit CPU [video] -
This one is written in Java: https://github.com/hneemann/Digital You can export your project as a Verilog file that can be used in the various FPGA tools.
comment by jecel · 2022-02-09 · in I decided to build a nine-bit computer -
…Logisim to export the schematic to a HDL of some sort to get close. No need, Digital ( https://github.com/hneemann/Digital ) already does this: > A circuit can be exported to VHDL or Verilog. There is also direct support for the BASYS3…
comment by ChickeNES · 2021-12-11 · in An 8-bit minicomputer with a fully custom architecture -
I like Helmut Neemann's Digital : https://github.com/hneemann/Digital It simulates logic, supports automated testing, simulates and analyses combinatorial and sequential logic, comes with a large library of components (generic stuff,…
comment by Gracana · 2020-01-10 · in After 36 years as a paid product, the Micro-Cap Circuit Simulator is now free