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6502

A debuggable, instrumentable 6502 processor simulator written in JavaScript with no runtime dependency.

Project status

The whole 6502 instruction set is implemented. It should be possible to use this to run arbitrary assembly code.

What is not done:

  • Timing: the number of cycles for each instruction is not being computed right now, and this would be necessary for applications that require precise timing.
  • Clock: related to timing, the ability to execute code based on a clock.

Contribution guide

I appreciate contributions in the form of bug reports, documentation, bug fixes, new features, and general feedback. The list of things not done above can give you an idea of what's a good contribution, but do give me a heads up so we avoid duplicated effort.

Acknowledgements

The following sites and projects were invaluable resources while developing this library:

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A debuggable, instrumentable 6502 processor simulator written in JavaScript with no runtime dependency.

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