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Electronics => PCB/EDA/CAD => Topic started by: djsb on May 15, 2021, 03:16:16 pm

Title: Logisim Evolution
Post by: djsb on May 15, 2021, 03:16:16 pm

Just thought I'd share my discovery of this open source logic simulation software. It's a further development of the original Logisim.

https://github.com/reds-heig/logisim-evolution (https://github.com/reds-heig/logisim-evolution)

There is a short video here that first made me aware of this software.

https://www.youtube.com/watch?v=gYmDpcV0X7k (https://www.youtube.com/watch?v=gYmDpcV0X7k)

There are a few more on YouTube.

Title: Re: Logisim Evolution
Post by: nctnico on May 17, 2021, 02:23:40 pm

This is interesting. Especially since it supports VHDL. It could be a useful tool to create quick testbenches to test pieces of VHDL code. I might give this a try; I have an upcoming VHDL project.

Title: Re: Logisim Evolution
Post by: Bassman59 on May 18, 2021, 03:08:28 pm

Quote from: nctnico on May 17, 2021, 02:23:40 pm

This is interesting. Especially since it supports VHDL. It could be a useful tool to create quick testbenches to test pieces of VHDL code. I might give this a try; I have an upcoming VHDL project.

My test benches use bus-functional models of the devices that connect to the FPGA design. I don't know how well that would work in this environment.

Title: Re: Logisim Evolution
Post by: rdtsc on May 18, 2021, 11:40:39 pm

I'm a little leery of installing this on Windows. Unsure about the other versions and OS's, but some rather unusual things appear to be going on in the latest v3.4.5 for Windows:
https://www.virustotal.com/gui/file/4cfb842f402e5acdc424780f3e7faa112841517002a3cc24bcefd208c36bac31/detection (https://www.virustotal.com/gui/file/4cfb842f402e5acdc424780f3e7faa112841517002a3cc24bcefd208c36bac31/detection)

Hopefully someone can come along with evidence that this behavior is truly benign.

Title: Re: Logisim Evolution
Post by: dave_k on May 19, 2021, 12:16:26 pm

"No security vendors flagged this file as malicious."

Title: Re: Logisim Evolution
Post by: rdtsc on May 20, 2021, 01:37:41 pm

Right, I think the code itself is fine. Just some peculiarities about the installer are triggering suspicion.

• Why is msiexec.exe started in 'C:\Users\admin\Downloads\msiexec.exe'?
• Why are files written to 'C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host\upnphost\udhisapi.dll' and 'C:\Windows\System32\Tasks\Microsoft\Windows\DiskDiagnostic\Microsoft-Windows-DiskDiagnosticDataCollector'?
• Why is the registry key 'HKLM\SOFTWARE\Microsoft\Windows Media Player NSS\3.0\Servers\A70D59A1-8EAD-4F40-AAAB-FBFC460800A4\FriendlyName' set to 'WORK:admin'?

In any case, I was able to extract the .msi using https://www.legroom.net/software/uniextract#download (https://www.legroom.net/software/uniextract#download) (7zip would not work) and THAT all tests fine, nothing suspicious.  Runs fine, too.  It does cause a Windows Firewall message to popup, asking for access to your network/domain.  Can un-check and click Cancel.