8-bit-CPU
Homebrew 8-bit CPU (by Velko)
65C02-Tool
By Nectivio
Our great sponsors
8-bit-CPU | 65C02-Tool | |
---|---|---|
11 | 8 | |
10 | 33 | |
- | - | |
9.0 | 0.0 | |
5 months ago | about 2 years ago | |
Python | C++ | |
MIT License | MIT License |
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.
65C02-Tool
Posts with mentions or reviews of 65C02-Tool.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-12-09.
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TommyProm or Ben Eater's programmer
If you have an Arduino Mega, I highly recommend this one: https://github.com/Nectivio/65C02-Tool
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I finally figured it out! Integer to individual bits WITHOUT direct port manipulation!
Granted, this exists (and partly inspired my current program), but I wanted something I could actually understand how it works and be able to fix it, should the need arise. Direct port manipulation is still voodoo witchcraft to me and looks like it is more trouble than it is worth, at least for my purposes. I know it's much faster, but I'm planning on stepping through clock cycles one by one for the majority of the time, so I'm willing to sacrifice speed for clarity.
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EEPROM Programmer for 6502
If you have an Arduino mega, I made a tool here that, (among many other things,) can be used as a eeprom programmer.
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Is the EEPROM Programmer in the 6502 kit the best you can do for the price?
Just checked. There is a specific paragraph in the git repository discussing about "Enabling or Disabling the Software Data Protection (SDP) of an AT28C256 EEPROM"
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Hot swappable EEPROM sockets?
This is the tool: https://github.com/Nectivio/65C02-Tool
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Anyone using 65C02-Tool to program the 6502 Computer EEPROM "in-place" directly from the host connected to the Arduino?
While browsing this reddit, I found the 65C02-Tool (reddit, Github) written by user u/nectivio being what I was looking for! It features a very robust Monitor, clock generator / measurement, Peek, Poke, EEPROM Read and Write *from Arduino serial monitor UI* (can write from a single-byte up to a 64 bytes IIRC). Icing on the cake: you can program the whole EEPROM in one shot without removing it from the circuit!
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Possible Alternative to EEPROM programmer?
I posted a tool here for the Arduino mega that can (among other things) program the eeprom.
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I made a tool for debugging a 6502 computer with an Arduino mega
I've created a free interactive tool for debugging the 6502 computer with an Arduino Mega.
What are some alternatives?
When comparing 8-bit-CPU and 65C02-Tool you can also consider the following projects:
logisim-evolution - Digital logic design tool and simulator
The-8-bit-SAP-3 - Documentation and source files for a SAP-3 breadboard Computer
customasm - 💻 An assembler for custom, user-defined instruction sets! https://hlorenzi.github.io/customasm/web/
iverilog - Icarus Verilog
Digital - A digital logic designer and circuit simulator.
pico-test-runner