beebjit-MCP

beebjit-MCP is a Python-based Model Context Protocol (MCP) server that lets an AI application instantiate, connect to, drive, capture output from, and interrogate a real BBC Micro emulator.

Ask an AI agent something like:

Boot a BBC Model B, then type PRINT "HELLO" at the BASIC prompt, and read the screen back.

A couple of seconds later HELLO appears in the tool-result pane. That's it.

beebjit-MCP drives Chris Evans' beebjit, a cycle-accurate, high-performance BBC Micro emulator written in C. Install and configure beebjit before using beebjit-MCP. The installation guide walks through it.

What the AI agent can do with it

• Boot a BBC B, Master 128 (MOS 3.20 or 3.50), or Master Compact session, with or without a disc image. DFS images use .ssd / .dsd; ADFS images use .adl / .adf.

• Type ASCII into the keyboard and have it land as real BBC keypresses. SHIFT handling, CAPS LOCK control, and special keys like arrows and function keys are all wired.

• Wait for text to appear on the MODE 7 screen, or for the BASIC > prompt.

• Read or write BBC Micro RAM, read 6502 register state, and disassemble 6502 instructions.

• Run a whole BBC BASIC program one-shot and capture the final screen.

• Tear everything down cleanly when the client disconnects.

Related MCP server: Commodore 64 Ultimate MCP Server

Licence

MIT. See LICENSE.

beebjit is GPLv3 and is never bundled in this repository or its release artefacts; the user installs beebjit themselves.

Acknowledgements

Thanks to Chris Evans (scarybeasts@gmail.com), creator and maintainer of beebjit. Without his work, none of this would exist.

Fork Notice

beebjit-MCP currently depends on a fork of beebjit that carries the small set of fixes and flags it needs. See installation for the exact list.

Disclaimer

beebjit-MCP is a separate project from beebjit, and is not affiliated with, sponsored, or endorsed by Chris Evans or the beebjit project.

For the canonical beebjit source and documentation, see scarybeasts/beebjit.