Breadbin466 vs c64js
Breadbin466
github.comc64js
github.comSide by side
| Figure | Breadbin466 | c64js |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 1 | 0 |
| Spec score · Commodore 64 Emulators | 8.0 (#7) | 7.2 (#15) |
| License | The emulator is licensed under MIT, while the Commodore ROM images distributed with it are explicitly excluded from that license. | The code and documentation are released under the MIT license. |
| Purpose | Breadbin466 is a from-scratch Commodore 64 emulator written in Rust that focuses on accurately modeling one PAL Assy 250466 machine. | c64js is an early Commodore 64 emulator written from scratch in JavaScript. |
| Sound | Its MOS 6581R4AR SID model is based on characterisation of a physical datecode 2286 chip and models oscillator, DAC, mixing, and filter behavior. | The SID chip for sound is not emulated. |
Plans
In their own words
Breadbin466
Breadbin466 is a free Commodore 64 emulator written in Rust, focused on modeling one PAL Assy 250466 machine. Its cycle-driven emulation covers the MOS 6510 CPU and VIC-II video timing and generation, including bus arbitration. The SID sound model draws on a physical datecode 2286 chip and models oscillator, DAC, mixing, and filter behavior. Its Commodore 1541 drive emulation includes a separate CPU, VIAs, mechanics, GCR read channel, IEC communication, fastloaders, and protected-disk behavior. Other modeled hardware includes CIA interfaces, a 1351 proportional mouse, a Datassette with TAP playback and recording, cartridges, and a 512 KB REU. It supports D64, G64, NIB, NBZ, and D7Z disk images, with tools for image creation, conversion, and space reclamation. The integrated debugger provides breakpoints, disassembly, history, and configurable tracing. Native menus and Inspector windows are provided on macOS, Windows, and Linux. Version 0.99.0 is described as feature-complete, with broader testing still remaining before 1.0.