nqsap
Marlin
nqsap | Marlin | |
---|---|---|
7 | 755 | |
20 | 15,902 | |
- | 0.5% | |
0.0 | 9.8 | |
over 1 year ago | 3 days ago | |
C++ | C++ | |
- | GNU General Public License v3.0 only |
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nqsap
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BEAM Computer!
I found invaluable ideas in Tom's NQSAP 8-bit computer (both breadboardand PCB builds) that features most of the 6502 instructions and addressing modes. NQSAP led me to deep dive into overflow, ALU understanding, learning about glitches and in general to assimilate a ton of clever ideas that Tom leveraged in his builds.
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connect the worlds worst graphic card with the 8 bit cpu?
I’m currently finishing up a modular PCB version of the design that has a few optimizations to minimize the EEPROM issue. Once it is finished, I’m planning to see how fast it can be clocked. There is a lot of documentation on the breadboard version here and the PCB version is in the same repo: https://tomnisbet.github.io/nqsap/
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16-Bit Processor (Step 1: Approach to Bus and Modules)
Sure thing! I have a write up on github, along with all of the schematics, microcode, and support files. The original breadboard version is here: https://tomnisbet.github.io/nqsap/
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Whats a good list of all the well documented "Upgraded 8bit Ben Eater Computer. I see things like SAP-1 SAP-3 etc etc some names mentioned.... Rolf computer?
Also this guy did some decent documenting. https://tomnisbet.github.io/nqsap/
- The Not Quite Simple as Possible (Nqasp) Breadboard Computer
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What to do with your build post-project
I started with an 8-bit SAP-1 design and then added on a bunch of extensions until it had many of the equivalent instructions and addressing modes of a 6502 processor. As the build progressed, I documented it all on this github page.
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First set of boards for an 8-bit build
Just got the first set of boards for my PCB version of the 8-bit computer. The computer is a new build of my NQSAP design. The PCB layout is based on this post from u/djh82uk: https://www.reddit.com/r/beneater/comments/pn4j6j/finally_complete_with_all_bugs_fixed/ with a few changes:
Marlin
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Why Prusa is floundering, and how you can avoid their fate
There is _a lot_ wrong with Marlin. It is a complex codebase, full with ancient artefacts, litterred with preprocessor ifdefs every 2-3 lines of code, dynamic includes in the middle of CPP files, etc[1]. It's about as unreadable as C++ code gets--well, I guess it's not template metaprogramming.
Klipper by contrast is a breeze to read through[2].
I am very grateful for Marlin, for all of reprap, and everyone who has contributed to it. But saying there is nothing wrong with it is straight up misguided.
[1]: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/M...
[2]: https://github.com/Klipper3d/klipper/blob/master/src/lcd_hd4...
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E steps way off.
I think you are mistaken. I can't speak for implementations preceding the Ender 3 V2, so what you're saying may have been true at some point for other machines. However, here you can see Marlin developers confirm that there is an EEPROM on the stock E2V2 board using diagrams from Creality and photographic confirmation. Here is the datasheet for the EEPROM. Here is a thread discussing this Marlin release, and also the then-recent release of official Creality firmware which resolved the same issue. Since the stock firmware is based on Marlin, and at the time Marlin did not support this type of EEPROM, the EEPROM was not usable at launch. Any mainstream firmware (official or third-party) from the last three years will be using the onboard EEPROM unless the user intentionally specified otherwise.
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FYI: Marlin 2.1.2.1 on Sapphire plus v2
pull latest Marlin from github: https://github.com/MarlinFirmware/Marlin
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Ender 3 Pro + Octoprint = Thermal Malfunction, system stopped! Heater_ID: E0
Also, checked the following discussion but seems like I need to update the firmware to be able to comment that like right? Temperature variance monitor tweaks by zeleps · Pull Request #23571 · MarlinFirmware/Marlin · GitHub
- Marlin DACAI Screen Bug
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Anycubic Kobra Marlin 2.1+ based custom firmware
i spent some time and successfully rebased Kobra 2.8.2 OG firmware from an unknown Marlin ~2.0.8 frankenstein to a clean latest (as of now) release (not bugfix) 2.1.x -- v2.1.2.1 + 1 commit
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Digraphs and Trigraphs
As an example, check the macropocalypse in Marlin - but the actual trigger for me to start was Reprap firmware doing a floating point divide in interrupt context while targeting AVR8 core…
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Need advice on intermittent thermal runaway (Ender 3 V2)
Any change of thermistor or to a PT100/PT1000 will require recompiling the firmware, because every type has different characteristics. Marlin uses an internal table to calculate the temperature for whatever reading it gets from the CPU's analogue-to-digital converter. It has many tables for different thermistors, but only one is ever incorporated at compile time. So you have to specify which type you're using. You can see the commonly-used types in the list in Marlin's Configuration.h file, in the section headed // @section temperature. The tables themselves are in Marlin/src/module/thermistor.
- Marlin ramps1.4
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Has anyone actually edited Marlin source code and added a new feature?
FWIW It IS open source but the GNU General Public License v3.0 rules apply. https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/LICENSE
What are some alternatives?
The-8-bit-SAP-3 - Documentation and source files for a SAP-3 breadboard Computer
MKS-TinyBee - MKS TinyBee is a mainboard for 3d printing, based on ESP32 module
SKR-2
klipper - Klipper is a 3d-printer firmware
Marlin-2.0.X-MKS-Robin-Nano - Marlin 2.0.X for the MKS Robin Nano 1.1/1.2
BIGTREETECH-SKR-mini-E3 - BIGTREETECH SKR-mini-E3 motherboard is a ultra-quiet, low-power, high-quality 3D printing machine control board. It is launched by the 3D printing team of Shenzhen BIGTREE technology co., LTD. This board is specially tailored for Ender 3 printer, perfectly replacing the original Ender3 printer motherboard.
Ender-3 - The Creality3D Ender-3, a fully Open Source 3D printer perfect for new users on a budget.
Marlin-bugfix-1.1.9 - Marlin 1.1.x bugfix for Ender 3 with BLTouch
Cura - 3D printer / slicing GUI built on top of the Uranium framework
BIGTREETECH-TouchScreenFirmware - support TFT35 V1.0/V1.1/V1.2/V2.0/V3.0, TFT28, TFT24 V1.1, TFT43, TFT50, TFT70
BTT_SKR_13_14_14T_SD-DFU-Bootloader - This is a repository of BIGTREETECH bootloaders. The originals are stored under the bootloader_bin/backed_up_original_bootloaders/ directory. This repository also has a bootloader for the SKR E3 TURBO to fix the high pitch sound coming out of the CR10_STOCKDISPLAY it is located on the bootloder_bin/compiled_bootloader_bin/ directory.
BIQU-B1