Breadbin466
- Android app
- Not listed
- Free plan
- Yes
- Runs on
- Linux, Mac, Windows

Summary
Breadbin466 is a free Commodore 64 emulator written from scratch in Rust, focused on modeling a PAL Assy 250466 machine. Its cycle-driven hardware emulation covers a MOS 6510 CPU and VIC-II raster timing, video generation, and bus arbitration. Its SID sound model is based on characterization of a physical datecode 2286 chip and covers oscillator, DAC, mixing, and filter behavior. The cycle-driven 1541 drive emulation includes its own CPU, VIAs, mechanics, GCR read channel, IEC communication, fastloaders, and protected-disk behavior. Other modeled hardware includes CIA timers and interfaces, a 1351 proportional mouse, a 1530 Datassette with TAP playback and recording, cartridges, and a 1764 REU with 512 KB. It supports D64, G64, NIB, NBZ, and D7Z disk images, along with tools for creating and converting images and reclaiming space. The integrated debugger offers breakpoints, disassembly, history, and configurable tracing. Native menus and Inspector windows are available on macOS, Windows, and Linux. Version 0.99.0 is described as feature-complete and ready for community testing, with broader testing still remaining before 1.0.
Who it is for
Breadbin466 suits users seeking a detailed emulator for a PAL Assy 250466 Commodore 64, including those who want disk tools, audio capture, or debugging features. It is also relevant to users who need macOS, Windows, or Linux support.
What is good
- Models cycle-driven CPU and video hardware.
- Emulates a cycle-driven 1541 disk drive.
- Supports five listed disk-image formats.
- Includes an integrated debugger and PCM WAV capture.
What to know first
- Emulation focuses on one PAL Assy 250466 machine.
- Linux support is through source builds.
- Version 0.99.0 still has broader testing remaining before 1.0.
- Bundled Commodore ROM images are excluded from the MIT license.
Verdict
Breadbin466 emphasizes detailed modeling of one C64 hardware configuration, with disk, tape, debugger, and audio-capture capabilities. Note that its ROM images are not covered by the emulator's MIT license and the project identifies wider testing as remaining before version 1.0.
Breadbin466 plans and pricing
All plansCompared on Commodore 64 emulators
- Free plan
- Yesgithub.com
- Supported platforms
- macOS, Windows, Linuxgithub.com
- Disk and tape formats
- D64, G64, NIB, NBZ, D7Zgithub.com
- Built-in debugger
- Yesgithub.com
- Emulated C64 variants
- PAL Assy 250466github.com
Facts
- Purpose
- Breadbin466 is a from-scratch Commodore 64 emulator written in Rust that focuses on accurately modeling one PAL Assy 250466 machine.github.com · 29 Sept 2026
- CPU and video
- It emulates a cycle-driven MOS 6510 CPU and VIC-II raster timing, video generation, and bus arbitration.github.com · 29 Sept 2026
- Sound
- Its MOS 6581R4AR SID model is based on characterisation of a physical datecode 2286 chip and models oscillator, DAC, mixing, and filter behavior.github.com · 29 Sept 2026
- Disk drive
- The cycle-driven Commodore 1541 emulation includes its own CPU, VIAs, mechanics, GCR read channel, IEC communication, fastloaders, and protected disk behavior.github.com · 29 Sept 2026
- Other hardware
- Features include CIA timers and interfaces, a 1351 proportional mouse, a 1530 Datassette with TAP playback and recording, cartridges, and a 1764 REU with 512 KB.github.com · 29 Sept 2026
- Disk formats
- It supports D64, G64, NIB, NBZ, and the project's open D7Z disk-image format, plus disk-image creation, conversion, and space-reclamation tools.github.com · 29 Sept 2026
- Debugging
- The integrated debugger includes breakpoints, disassembly, history, and configurable execution, read, and write tracing.github.com · 29 Sept 2026
- Audio capture
- The project lists session-long PCM WAV audio capture and command-line automation facilities for testing and characterisation.github.com · 29 Sept 2026
- Desktop features
- Native menus and Inspector windows are provided on macOS, Windows, and Linux, with fixed-refresh display pacing and 44.1 kHz audio preferred.github.com · 29 Sept 2026
- Availability
- The repository says macOS and Windows builds are available through release downloads and Linux is supported through source builds.github.com · 29 Sept 2026
- Project status
- Version 0.99.0 is described as feature-complete and ready for community testing, with broader testing remaining before 1.0.github.com · 29 Sept 2026
- License
- The emulator is licensed under MIT, while the Commodore ROM images distributed with it are explicitly excluded from that license.github.com · 29 Sept 2026
- Support
- Users can send feedback to [email protected] or report reproducible problems through GitHub Issues.github.com · 29 Sept 2026
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Sources
- github.com/Breadbin466/Breadbin466· checked 29 Sept 2026