rust64
A Commodore 64 emulator written in Rust with a built-in visual debugger for understanding hardware internals.
What is rust64?
Rust64 is a Commodore 64 emulator written in the Rust programming language. It provides cycle-accurate emulation of the C64's hardware, including the VIC-II, CIA, and SID chips, with a focus on transparency and educational value. The project includes a built-in visual debugger that allows users to inspect memory and registers in real-time.
Developers and hobbyists interested in retro computing, emulator development, or learning about the Commodore 64's hardware internals through a clear, Rust-based implementation.
Rust64 offers a uniquely transparent and educational approach to C64 emulation with its integrated visual debugger and cycle-accurate design. It is built in Rust for performance and safety, making it a modern tool for exploring classic hardware.
Overview
Commodore 64 emulator written in Rust
Use Cases
Best For
- Learning how the Commodore 64 hardware operates internally
- Developing or testing C64 software in an emulated environment
- Studying emulator implementation techniques in Rust
- Debugging C64 programs with real-time memory and register inspection
- Educational projects focused on retro computing and hardware emulation
- Experimenting with cycle-accurate emulation of classic systems
Not Ideal For
- Users needing full compatibility with disk-based C64 software (e.g., games requiring d64/t64 files)
- Gamers or hobbyists seeking a polished, user-friendly emulator with a GUI
- Projects requiring stable, production-ready emulation for continuous integration
- Developers needing precise timing for elaborate C64 programs or demos
Pros & Cons
Pros
Provides fairly accurate cycle-based emulation of C64 hardware, making it ideal for studying how components like the VIC-II and SID operate in real-time, as highlighted in the README's focus on unobfuscated internals.
Includes a built-in debugger that displays memory pages, registers, and a raster debugger for VIC cycles, allowing real-time inspection of hardware states, which is rare in many emulators.
Aims to present C64 workings clearly for learning, with command-line loading and key mappings that mimic the original system, supported by detailed resources and demos.
Written in Rust for performance and safety, leveraging cargo for easy builds, though it requires Rust 1.58.0 or higher, appealing to developers interested in modern systems programming.
Cons
Missing serial bus/disk drive support (d64, t64, tap) and has unimplemented ops, limiting compatibility with some C64 software, as admitted in the TODO and known issues sections.
Debug output (F11) is noted as 'very slow!' and elaborate programs may not run correctly due to timing inaccuracies, reducing its utility for real-time applications or gaming.
Requires SDL2 with extra installation steps beyond minifb, and compilation depends on specific Rust versions, which can be a barrier for casual users or those on diverse systems.
Described as an on-off WIP project with varying update frequency, making it unreliable for long-term projects or fixes, as noted in the README.
Frequently Asked Questions
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