Question 1

How do I load a disc image in jsbeeb?

Accepted Answer

Use URL parameters like disc1=XXX where XXX is a filename from the discs directory, or disc1=sth:ZZZ to load from the Stairway to Hell archive. For example, add ?disc1=elite.ssd to the base URL to boot Elite directly.

Question 2

Can I use a joystick with jsbeeb on a modern PC?

Accepted Answer

Yes, jsbeeb supports USB/Bluetooth gamepads and mouse-based analogue joystick emulation. Note that BBC Micro joysticks use inverted axes (e.g., left = 65535, right = 0), as explained in the Joystick Support section.

Question 3

How to save and rewind game progress in jsbeeb?

Accepted Answer

Use save states via the State menu or Ctrl+S/Ctrl+O in the Electron app. The rewind buffer captures snapshots every second; open the scrubber with Alt+PageDown to navigate visually and jump back to previous states.

Question 4

jsbeeb or B-Em for BBC Micro emulation?

Accepted Answer

jsbeeb is browser-based and written in JavaScript, ideal for web accessibility and URL parameter customization, while B-Em is a C emulator potentially offering better desktop performance. jsbeeb excels in modern deployment but may have more setup complexity.

Question 5

How to build jsbeeb as a desktop app on Ubuntu?

Accepted Answer

Install Node.js and npm, then run npm install, npm run build, and npm run electron:build. If RPM errors occur, install FPM manually with sudo gem install fpm and use USE_SYSTEM_FPM=true, as detailed in the Running as a Desktop Application section.

Question 6

What keyboard mappings should I know for jsbeeb?

Accepted Answer

BBC Break is mapped to F12, BBC F0 to F10, and * to " or shift-2. Full mappings are in the Keyboard Mappings section, and shortcuts like Ctrl+Insert for turbo mode are listed under Emulator Shortcuts.

Question 7

Can I run my own BASIC programs from GitHub in jsbeeb?

Accepted Answer

Yes, create a GitHub Gist, get the raw URL, and use the loadBasic parameter with autorun in the URL. For example, ?loadBasic=https://gist.githubusercontent.com/...&autorun will load and run the code automatically.

JSBeeb

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