MC6809 0.7.1

MC6809 CPU emulator written in Python

MC6809 CPU emulator written in Python

MC6809 is a Open source (GPL v3 or later) emulator for the legendary 6809 CPU, used old homecomputer Dragon 32/64 and Tandy TRS-80 Color Computer (CoCo) built in the 1980s...

Tested with Python 3.8, 3.9, 3.10 and PyPy3

A example usage can be find in: MC6809/example6809.py

Getting started:

~$ git clone https://github.com/6809/MC6809.git
~$ cd MC6809
~/MC6809 $ ./cli.py --help

The output of ./cli.py --help looks like:

Usage: ./cli.py [OPTIONS] COMMAND [ARGS]...

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --help      Show this message and exit.                                                          │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
╭─ Commands ───────────────────────────────────────────────────────────────────────────────────────╮
│ benchmark            Run a MC6809 emulation benchmark                                            │
│ profile              Profile the MC6809 emulation benchmark                                      │
│ version              Print version and exit                                                      │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

There is a simple benchmark. Run e.g.:

~/MC6809$ ./cli.py benchmark --help

The output of ./cli.py benchmark --help looks like:

Usage: ./cli.py benchmark [OPTIONS]

 Run a MC6809 emulation benchmark

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --loops       INTEGER  How many benchmark loops should be run? [default: 6]                      │
│ --multiply    INTEGER  est data multiplier [default: 15]                                         │
│ --help                 Show this message and exit.                                               │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

profile

You can run the Python profiler against the benchmark, e.g.:

~/MC6809$ ./cli.py profile --help

The output of ./cli.py profile --help looks like:

Usage: ./cli.py profile [OPTIONS]

 Profile the MC6809 emulation benchmark

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --loops       INTEGER  How many benchmark loops should be run? [default: 6]                      │
│ --multiply    INTEGER  est data multiplier [default: 15]                                         │
│ --help                 Show this message and exit.                                               │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

development

For development exists dev-cli, e.g.:

~/MC6809$ ./dev-cli.py --help

The output of ./dev-cli.py --help looks like:

Usage: ./dev-cli.py [OPTIONS] COMMAND [ARGS]...

╭─ Options ────────────────────────────────────────────────────────────────────────────────────────╮
│ --help      Show this message and exit.                                                          │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
╭─ Commands ───────────────────────────────────────────────────────────────────────────────────────╮
│ check-code-style            Check code style by calling darker + flake8                          │
│ coverage                    Run and show coverage.                                               │
│ fix-code-style              Fix code style of all MC6809 source code files via darker            │
│ install                     Run pip-sync and install 'MC6809' via pip as editable.               │
│ mypy                        Run Mypy (configured in pyproject.toml)                              │
│ publish                     Build and upload this project to PyPi                                │
│ safety                      Run safety check against current requirements files                  │
│ test                        Run unittests                                                        │
│ tox                         Run tox                                                              │
│ update                      Update "requirements*.txt" dependencies files                        │
│ update-test-snapshot-files  Update all test snapshot files (by remove and recreate all snapshot  │
│                             files)                                                               │
│ version                     Print version and exit                                               │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

Run tests, e.g.:

~/DragonPy$ ./dev-cli.py coverage
# or just:
~/DragonPy$ ./dev-cli.py test
# or with different Python versions:
~/DragonPy$ ./dev-cli.py tox

TODO

• Update 'cpu6809_html_debug.py'
• Use bottle for http control server part
• unimplemented OPs:
  • RESET
  • SWI / SWI2 / SWI3
  • SYNC

History

(Some of the points are related to DragonPy Emulator)

• dev
  • TBC
• 05.08.2023 - v0.7.1
  • Split CLI in a app and dev version with different venvs.
  • Update requirements
• 07.03.2023 - v0.7.0
  • Replace the Makefile with a click CLI
  • Use pip-tools and https://github.com/jedie/manageprojects
  • Rename git master to main branch
  • Run CI tests against Python 3.9, 3.10 and 3.11
  • Replace Creole README with markdown
• 10.02.2020 - v0.6.0
  • modernize project and sources
  • skip support for Python 2
  • minimal Python v3.6
• 19.10.2015 - v0.5.0
  • Split CPU with mixin inheritance
  • Optimizing:
    • remove .get() function calls from registers
    • move Condition Code Register (CC) into CPU via mixin class
  • Bugfix TFR and EXG by convert_differend_width()
  • Run DragonPy unittests on travis CI, too.
• 24.08.2015 - v0.4.6
  • Add a "max_delay", to fix the "freeze" after a speed limit change
  • rename some of the "speed limit" variables
• 21.08.2015 - v0.4.5
  • deactivate 'cpu6809_html_debug.py' - TODO: update it!
  • update cli unittests
  • update README and code cleanup
• 10.08.2015 - v0.4.4 - bugfix and cleanup the tests
• 10.08.2015 - v0.4.3 - run unittests with nose
• 27.05.2015 - v0.4.2 - Add MC6809/example6809.py
• 26.05.2015 - v0.4.0, 0.4.1 - Split MC6809 from DragonPy
• 22.09.2014 - Remove hacked CPU skeleton generator scripts with commit ac903a8f
• 14.09.2014 - Release v0.2.0 - Add a speedlimit, config dialog and IRQ: Forum post 11780
• 05.09.2014 - Release v0.1.0 - Implement pause/resume, hard-/soft-reset 6809 in GUI and improve a little the GUI/Editor stuff: v0.1.0 see also: Forum post 11719.
• 27.08.2014 - Run CoCo with Extended Color Basic v1.1, bugfix transfer BASIC Listing with 8fe24e5...697d39e see: Forum post 11696.
• 20.08.2014 - rudimenary BASIC IDE works with 7e0f16630...ce12148, see also: Forum post 11645.
• 05.08.2014 - Start to support CoCo, too with 0df724b, see also: Forum post 11573.
• 04.08.2014 - Use the origin Pixel-Font with Tkinter GUI, see: Forum post 4909 and Forum post 11570.
• 27.07.2014 - Copyrigth info from Dragon 64 ROM is alive with 543275b, see: Forum post 11524.
• 29.06.2014 - First "HELLO WORLD" works, see: Forum post 11283.
• 27.10.2013 - "sbc09" ROM works wuite well almist, see: Forum post 9752.
• 16.10.2013 - See copyright info from "Simple6809" ROM with 25a97b6 see also: Forum post 9654.
• 10.09.2013 - Start to implement the 6809 CPU with 591d2ed
• 28.08.2013 - Fork "Apple ][ Emulator" written in Python: https://github.com/jtauber/applepy to https://github.com/jedie/DragonPy

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