b2 v20251015 is released. A cross-platform BBC Micro emulator. Use your Windows/Linux PC or macOS computer to play your old BBC games or develop new BBC software.

b2 Changelog:
Debugger stuff
Add initial support for symbols in debugger, thanks to Mark Fisher
Add support for breakpoints in I/O regions
Add view of memory-mapped I/O in memory and disassembly dialogs
Fix debugger's view of ROMs when using BBC B without ROM board
Symbols support is an ongoing work in progress.
UI stuff
The GUI Font Size setting has been replaced by a general GUI Scale, now a scale value rather than a pixel size. As a one-off, you'll need to set it up again. Sorry!
(macOS/Windows) Improve retina/high-DPI display support: should look at least a bit nicer
Improve native file dialogs generally: do a better job with suggested paths, remembering previous folder, and adding file extensions
(If using a high-DPI display with Linux, use the GUI scale to scale everything to taste. It seems to be difficult to auto-detect a sensible value, so b2 doesn't even try. )
Emulation stuff
Fix 1770 FDC issues: fix Watford DDB2/DDB3 double density; fix Watford DDB2 generally)
Fix video ULA address range

Download: b2 v20251015
Source:Here