Py65 provides tools for simulating hardware based on 6502-like microprocessors. It has the following goals:
Focus on ease of use and modularity rather than performance. Py65 is written in the Python programming language for productivity, while similar programs are written in C for performance.
Enable simulations to be created for systems where it might have otherwise not been practical, such as homebuilt computers.
Rigorously unit test all of the components. While the tools provided by Py65 may not always be perfect, their behavior is verified through tests so unexpected results are minimized.
Py65 packages are available on the
Python Package Index (PyPI). You download them from there or you can
easy_install to automatically install or upgrade Py65:
$ easy_install -U py65
Alternatively, you can download
a package from GitHub in
.zip format. After extracting the
package, use the following command to install Py65:
$ python setup.py install
The following devices are simulated at this time:
mpu6502simulates the original NMOS 6502 microprocessor from MOS Technology, later known as Commodore Semiconductor Group (CSG). At this time, all of the documented opcodes are supported. Support for the illegal opcodes is planned for the future.
mpu65c02simulates a generic CMOS 65C02 microprocessor. There were several 65C02 versions from various manufacturers, some with more opcodes than others. This simulation is based on the W65C02S from the Western Design Center (WDC).
Py65 includes a console-based machine language monitor (sometimes also called
a debugger). This program,
py65mon, allows you to interact with the
simulations that you build. Its features include:
Commands that are largely compatible with those used in the monitor of the popular VICE emulator for Commodore computers.
Ability to load, dump, and fill memory.
Simple assemble and disassemble capability, including support for labels and labels with offsets.
These people are responsible for Py65: