zig64

Spec sheet

Product

zig64 is a Commodore 64 MOS 6510 emulator core implemented in Zig.Read 11 Oct 2026 · github.com

Intended users

The README presents the core as a foundation for C64 software analysis, SID player routine analysis, debugging, and custom sound tools.Read 11 Oct 2026 · github.com

License

The project is released under the MIT License, which the README says allows free modification and distribution.Read 5 Oct 2026 · github.com

Headquarters

Vienna, AustriaRead 28 Sep 2026 · github.com

Build and tests

The README gives `zig build` and `zig build test` commands; its Requirements heading lists no requirements.Read 5 Oct 2026 · github.com

CPU emulation

It implements documented MOS 6502/6510 instructions and addressing modes with cycle-accurate timing.Read 11 Oct 2026 · github.com

Debugging

It provides step-by-step CPU tracing, state inspection, and SID change logging.Read 11 Oct 2026 · github.com

Disassembler

Its assembly tools decode 6502/6510 instructions into readable mnemonics and metadata, and can disassemble memory ranges.Read 11 Oct 2026 · github.com

Disassembly

Its Asm component decodes 6502/6510 instructions into mnemonics and metadata and supports disassembly.Read 5 Oct 2026 · github.com

Integration

The README describes zig64 as a computational backbone for virtual C64 applications and names zigreSID as a related tool it can power.Read 11 Oct 2026 · github.com

License and warranty

The project uses the MIT License, which provides the software “AS IS” without warranty.Read 11 Oct 2026 · github.com

Maintainer

The license identifies the copyright holder as Mario Schallner, also known as M64.Read 11 Oct 2026 · github.com

Maker information

The repository is published by the GitHub account M64GitHub; the opened project page does not state a headquarters or founding date.Read 5 Oct 2026 · github.com

Maker location

The M64GitHub profile lists Vienna, Austria.Read 11 Oct 2026 · github.com

Program loading

The core can load .prg files into its 64KB memory and optionally set the CPU program counter to the load address.Read 11 Oct 2026 · github.com

Related project

The README names zigreSID as a related SID sound emulation library for Zig that integrates with zig64 for .sid playback.Read 5 Oct 2026 · github.com

SID analysis

It tracks SID register writes with cycle information and decodes register changes such as waveform, filter, and envelope settings.Read 11 Oct 2026 · github.com

Testing

The README describes integration with Zig’s testing framework for writing unit tests for C64 code.Read 5 Oct 2026 · github.com

Video timing

Its VIC component synchronizes CPU cycles with PAL and NTSC timing and emulates raster events without generating video output.Read 11 Oct 2026 · github.com

Zig testing

The project describes integration with Zig’s testing framework for writing unit tests for C64 code.Read 11 Oct 2026 · github.com

Where Specifiction places it

• Commodore 64 Emulators#28 of 316.5