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Yes, a historical Arduino Forum project reported booting Commodore 64 ROMs in an adapted 6502 emulator on the Arduino Due and displaying output. But the posts describe a constrained experiment—not a verified, complete, real-time C64 emulator. They show custom ROM memory mapping and a basic display path; they do not establish working C64 games, accurate video or sound, or full peripheral support.
What the Arduino Due project demonstrates
In a 2013–2014 Arduino Forum discussion, project author janost described adapting a 6502 emulator to boot C64 ROMs and showing output on a TFT. The implementation mapped reads to the BASIC and KERNAL ROM address ranges, treated part of the I/O range as zero, and updated the display when writes reached screen memory. Janost summarized the change: “This change is needed in cpu.c to boot the C64:” Arduino Forum discussion.
That is evidence of a simplified CPU, memory, and display path. It is not evidence of complete C64 hardware emulation. Janost later clarified the scope: “This was only a test to know that the video and cpu emulation works.” The statement appears in the same forum discussion, dated June 30, 2014.
What the posts do not verify
- Accurate VIC-II graphics or C64 timing
- SID sound
- Broad game compatibility
- Joystick input, disk images, or disk-drive emulation
- A reproducible current build, maintained repository, or present-day display compatibility
What the Due brings to the experiment
Arduino identifies the Due as a SAM3X8E ARM Cortex-M3 board. Its published specifications include an 84 MHz clock, 96 KB SRAM, 512 KB flash, SPI, USB OTG, and 3.3 V operation. These are board specifications, not emulator benchmark results, and they do not establish that the board can meet all C64 timing or compatibility requirements. See Arduino’s Due hardware documentation and Arduino Due product listing.
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ROMs, memory mapping, and display
The forum example depended on suitable BASIC and KERNAL ROM images and custom memory mapping. In response to a participant asking whether “c64 v2” required Basic and kernal ROMs converted into “source format,” the discussion describes adapting the ROMs for the emulator. The thread says ROMs were not included with the code because of copyright concerns. Use only ROM images you are legally entitled to use; the discussion does not identify a verified source from which to obtain them.
The author described a 2.2-inch SPI TFT in the experiment and noted the demands of SPI data transfer. Treat it as an example, not a required or currently verified display model. The source does not provide a turnkey bill of materials or establish that a particular TFT will work with a modern build.
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Electrical compatibility matters
The Due uses 3.3 V I/O. Arduino warns that applying more than 3.3 V to an I/O pin can damage the board. Before connecting a display or other peripheral, verify its logic-level requirements and use appropriate level shifting where needed. The product listing provides the board’s electrical details: Arduino Due with Headers.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to expect if you want to recreate it
The forum discussion is useful as a record of a retro-computing experiment, but it does not establish a ready-to-build kit or a maintained emulator project. Recreating it would mean locating compatible emulator code and legally usable ROMs, adapting the memory map and display path, and resolving hardware and software compatibility yourself.
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- Do not assume a C64 game will run because the ROMs booted.
- Do not assume SID audio, full VIC-II behavior, joystick controls, or disk support.
- Check the display’s SPI support and 3.3 V logic compatibility before wiring.
- Expect custom emulation work; the available source does not document a turnkey build or controlled performance benchmark.
For context, another Arduino Forum project discusses memory constraints in a different emulator, but it is not a C64-on-Due benchmark: NESDUE discussion.
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