b2-20260322-193052-51e70d7

Note: a UI library update means your saved window positions will get reset, and you'll have to dock and/or position them again. Apologies.

Emulation stuff

• Add a config for Master Compact with MOS 5.11i and Arabic ROMs
• Add automatic saving of CMOS/EEPROM contents
• Add emulation of BBC B without ROM board
• Add MMFS support, thanks to Mark Fisher
• Add optional audio low pass filter
• Add SCSI hard disk emulation (compatible with standard Acorn ADFS)
• Fix 1770 FDC issues: fix Watford DDB2/DDB3 double density; fix Watford DDB2 generally
• Fix 65c02 timing issues (fixes Chuckie Egg 2023)
• Fix emulation of write-only I/O registers and empty ROM sockets
• Fix handling of 1 MHz memory regions for Master 128/Compact
• Fix occasional disk fault errors when using Opus Challenger
• Fix video ULA address range
• Improve Video NuLA accuracy

UI stuff

• Add background opacity setting for LEDs popup
• Add optional background economy mode: make b2 use a bit less CPU time when not in focus
• Add option for having the UI use a less pixelly font, which you might prefer
• The GUI Font Size setting has been replaced by a general GUI Scale, now a scale value rather than a pixel size.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!
• (Linux) Fix rendering issues when running with SDL3's sdl2-compat library rather than SDL2
• (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. )

Video stuff

• Add lossless video recording: produces a sequence of uncompressed TGAs and WAV files suitable for later compressing with another tool (e.g., ffmpeg)
• Fix video output aspect ratio
• (macOS/Linux) Improve video autio quality by preferring FLAC (lossless) when available
• (Windows) Improve video audio quality by emitting FLAC (lossless)

Debugger stuff

• Add an error for unrecognised HTTP API query parameters
• Add configurable debugger syntax
• 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
• Fix handling of £ (ASCII 96 in the BBC character set) in the debugger
• Fix possible crash when resizing stack debug window to be as small as possible
• Improve debugger setting persistence (this will be an ongoing effort)

Symbols support is an ongoing work in progress.

b2-20260322-220631-25d2579-prerelease

This prelease also includes everything in https://github.com/tom-seddon/b2/releases/tag/b2-20260322-193052-51e70d7

Emulation stuff

• Fix incorrect 65c02 NOP behaviour
• Improve 1770 FDC timing in double density mode

UI stuff

• Add load/save window layout
• Add option of reordering the configs in the Hardware menu

Debugger stuff

• Add some symbols and/or breakpoint features to the HTTP API
• Move some debug stuff into submenus, as the menu was getting rather long
• Move some debug stuff into a new Extras menu, hidden by default, as the menu was still a bit much

Other stuff

• Update some of the libraries that b2 uses

b2-20250808-172419-959a8ab

• Add option to hide BBC cursor when not in focus
• Add support for larger MOS ROM images: 64 KB (Compact/PC 128 S), 128 KB (Master 128 MegaROM), 512 KB (modern multi-OS)
• Add support for View Trilogy and Instant Mini Office II
• Allow sideways ROM load failure when switching config: it's just a warning now, so the BBC will still boot
• Fix some input focus stuff: give keyboard focus to BBC on startup; unpress BBC keys when not in focus; enable clickthrough on focus on all platforms
• Improve Video NuLA accuracy
• Windows: build with Visual Studio 2022
• Windows: fix fast user switching problems
• Windows: reduce CPU usage when display sleeps
• Windows: use newer libcurl
• Windows, macOS: use newer SDL2

b2-20250105-203025-e825ff1

• Update macOS version requirements
• Fix macOS app identifiers: b2 and b2 Debug were not distinguishable, interfering with System Preferences > Security & Privacy > Input Monitoring setup
• Add --no-limit-speed command line option, to start the emulator with limit speed disabled
• Add disk samples for 3.5" drive
• Fix command keyboard shortcuts taking priority over BBC input
• Update ffmpeg version in macOS release

b2-20241028-215441-a8b4f2a

Note if using macOS 11 Big Sur: please use the 10.9 dmg. Future releases will name the files correctly.

• Add native Apple SiIlicon build, targeting macOS 13+
• Add support for 32+ KB ROMs: Inter-Word, Inter-Base, Spellmaster, Quest Paint, Wapping Editor, PRES ABE, PRES ABE+
• Add some additional debugger stuff: relative cycle counter; add branch taken/not taken indicator; separate global/host/parasite state panels, more helpful display of return addresses on the stack
• Add text translation modes for use when copying text output to clipboard
• Add AMX/Watford mouse support
• Fix BBC cursor remaining visible when it shouldn't have been
• Fix needless CPU usage during Windows display sleep
• Fix some incorrect teletext font chars
• Give dialogs sensible default sizes
• Improve keymap editing UI a bit
• Improve BeebLink support (see docs)

b2-20240720-010024-9f95270

• Load game controller database before any joystick or gamepad initialisation. Fix #356

b2-20240710-232859-844adac

A UI library update means your window layout will become lost and you'll have to recreate it. Sorry! I hope this won't happen again.

• Add first pass emulation support for the upcoming Retro Hardware Advanced Digital Joystick Interface cartridge
• Add keyboard debug panel
• Add paging tick box to see MOS VDU driver view of memory
• Add support for Master Compact/Olivetti PC 128 S
• Fix double height teletext hold graphics state reset
• Fix crash if attempting to OSRDCH paste an empty string
• Fix crash that could occur when single stepping
• Fix various minor UI issues
• Improve direct disk image speed, especially for writes
• Improve debugger performance: lower CPU usage when using lots of debugger displays, lower CPU usage in general when no breakpoints are set and not single stepping
• Improve handling of non-ASCII chars in paths on Windows
• Improve Tube emulation accuracy
• Save current setting of Prioritize Command Keys
• Save separate CMOS RAM/EEPROM contents for each configuration
• Tweak disk image options a bit: direct disk images are now just disk images, and disk images are now known as in-memory disk images. So if you pick what sounds like the default option, you won't lose changes when exiting

b2-20231011-172305-4bd1939

• Add full screen toggle for Windows/Linux (on macOS, use inbuilt functionality)
• Add initial parallel printer support, not terribly useful yet
• Statically link Windows version with runtime libraries, hopefully avoiding the need to install Visual Studio runtime
• Fix config dialog ROM priority buttons
• Remove support for Visual Studio 2015 (haven't tested this for quite a while now)
• Remove support for Visual Studio 2017 (could be reinstated if anybody complains, though it'll remain unsupported)

b2-20230710-222352-c78e90b

• Add screenshot facility. Save to file or clipboard
• Add option to swap BBC joysticks around when using 1 gamepad to emulate both joysticks
• Load SDL game controller database (https://github.com/gabomdq/SDL_GameControllerDB), hopefully widening the set of supported gamepads
• Add new trace stop condition: stop on BRK
• Fix increasing sound latency when using File > Hard reset
• Windows 11: opt out of rounded window corners
• Windows: add FLAC audio output option when saving videos
• macOS/Linux: add 256 Kbps AAC audio output option when saving videos

b2-20230115-000739-a0a2fe9

• fix crash after removing all keyboard layouts
• fix missing hardware configs when run after fresh install
• add separate build that hopefully supports OS X 10.9 (Mavericks) and later - note that this version does not support creating videos
• rename normal macOS build so it's clearer it only supports macOS 11.0 (Big Sur) and later