8-bit-CPU
Homebrew 8-bit CPU (by Velko)
logisim-evolution
Digital logic design tool and simulator (by reds-heig)
Our great sponsors
8-bit-CPU | logisim-evolution | |
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11 | 25 | |
10 | 4,307 | |
- | 4.3% | |
9.0 | 9.4 | |
5 months ago | 3 days ago | |
Python | Java | |
MIT License | GNU General Public License v3.0 only |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
8-bit-CPU
Posts with mentions or reviews of 8-bit-CPU.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-02-08.
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Adding a keypad to Ben's 8-bit computer build
I later built a version that can read/store a full byte (2 key-presses) and present it to a CPU.
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How bad of an idea is this?
My code is available here, it has evolved since then and I actually abandoned the in-Arduino emulator later (re-wrote that part in Verilog). So it is best viewed at historical tag "emulator_1.0" in the repository.
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Arduino EEPROM programmer for Finch Image (Video Card)
Mark your data using PROGMEM directive (see example).
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Breadboard CPU on Arduino Nano?
My project sources are on GitHub. Theres a lot going on, and it is probably a bit over-engineered. You can start by taking a look at Arduino sketch and client library.
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Ben's 8 Bit Computer in an FPGA
I wrote an emulator for mine, then extended it to test out different designs, before building on hardware. The approach was a bit different, as I started by implementing 74-series logic chips. Then "wired" them together into CPU modules. This way emulator becomes a testable representation of what's possible using logic chips.
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Building the 8-bit computer in software
I wrote an emulator for my CPU in Verilog. Actually, I made it to test out various aspects before building, real hardware has not yet cached up with it.
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My 8-bit cpu running at full speed
The source code was in Python. I was able to debug it using Arduino-based adapter and (by using some "magic") translate into machine code binary. Since then I've switched to CustomAsm for code compilation and have other means to debug (emulator and debugger tool).
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Possible Alternative to EEPROM programmer?
If you looking for examples: here's how you create the array (code generated using xxd -i command), and here's how you use the array.
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Fully automatic boot loader for the 8-bit CPU?
In the beginning of program (on EEPROM), there's a small piece of code that reads all 256 address locations and writes them back. In BOOT mode, this effectively copies contents from ROM into RAM.
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If the manual says, never power Teensy from the USB and from Vin at the same time ..................................................................
Complicated? Perhaps, but do not underestimate the power of automated testing! When you can run a couple dozen tests in just few seconds, at any time, it really gives you confidence about the system. Obviously, one should spend time writing the tests, but it pays back rather quickly.
logisim-evolution
Posts with mentions or reviews of logisim-evolution.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-12-14.
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Problem with installation
I have downloaded logisim-evolution from github. While trying to run .msi file, Microsoft Defender blocked it for some reason. I scanned it with some other scanners and everything was fine. I'm not sure if this is safe to install it.
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Creating a package that requires Java 16
I am trying to define an xbps-src template for logisim-evolution, a Java app that requires Java 16. I am using depends="virtual?java-runtime" and, as expected by reading etc/defaults.virtual, OpenJDK 8 is used. Creating a etc/virtual file is ignored in .gitignore, so I guess it is made to be used with local packages. Using depends="virtual?java-runtime-17.0.5+7_1" works, as OpenJDK 17 provides that exact version of java-runtime. If it were updated, this package would break, because if I input a lower version, it will fail. I've tried using syntax like > and >=, but then I get the following error:
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A circuit simulator that doesn't look like it was made in 2003
Logism evolution works great and is quite modern.
https://github.com/logisim-evolution/logisim-evolution
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Hi there, I got an assigment that consists of moving a stepper motor (4 phases) using only a 74LS76N and a 74LS86N but when I tried to use the schematic, it didn't work, any help would be extremely helpful (more info in comments)
According to Logisim it creates the correct sequence for full stepping on a bipolar configuration. Falstad's Circuit simulator is another one you might try.
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Help needed to find FOSS tools to create graphical logic circuits and convert them to VHDL in class.
Did you check logisim-evolution? It is an active fork of logisim maintained by several lecturers at the Bern University of Applied Sciences.
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Ben Eater's 8-Bit CPU in Logisim, Plus More!
Here is the link for Logisim Evolution: https://github.com/logisim-evolution/logisim-evolution
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Crumb Circuit Simulator
In school, I worked on an introductory CS/EE class many, many moons ago, and I believed we used something like "logisim", which by then was pretty awesome - you could build simple things like adders, combine those with "macros" to bui;d ALUs and then whole simple CPUs.
Since then, the logisim project has discontinued, but it looks like there is a open source successor:
https://github.com/logisim-evolution/logisim-evolution
Have not tried it, but it looks promising, provided you don't want to do too complicated things (not sure if you could really model complex CPUs like a pentium with it). Also, it's pretty digital only, so I wouldn't expect Mac-Spice-like analog circuit simulation.
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I was making adder circuits in games 8 years ago in an attempt to build a computer. I finally worked my way up and built a working computer!
though i'd heavily recommend first building the circuit in a logic simulator like Logisim, or Digital before trying to build it in a game for an FPGA. (Digital even allows you to export circuits as Verilog/VHDL, and as a certified lazy person, that is very useful)
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Embedded Systems Weekly #112
Logisim-evolution An alternative free and open-source tool to design and simulate digital logic.
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Tang Nano 9K – FPGA SBC with HDMI
See if you are comfortable playing in https://github.com/logisim-evolution/logisim-evolution
What are some alternatives?
When comparing 8-bit-CPU and logisim-evolution you can also consider the following projects:
The-8-bit-SAP-3 - Documentation and source files for a SAP-3 breadboard Computer
Digital - A digital logic designer and circuit simulator.