b2

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

**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](https://github.com/markjfisher) * 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in focus * Add option for having the UI use a less pixelly font, which you might prefer * The GUI Font Size setting has been replaced by a general GUI Scale, now a scale value rather than a pixel size.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](https://github.com/markjfisher) * 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.

* 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

* 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

**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)

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

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

* 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)

* 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

* 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

* change macOS dmg format, hopefully fixing problems with older macOS versions No other changes since [b2-20221229-183226-24c745f](https://github.com/tom-seddon/b2/releases/tag/b2-20221229-183226-24c745f)

* Add second processor support: 4 MHz Master Turbo/3 MHz external second processor * Add joystick support * Add Windows file explorer/macOS Finder file association support * Improve CPU timing accuracy * Improve performance slightly * Improve debug tracing UI a bit (debug version only)

* Fix problems running with newer versions of macOS

* Update some macOS and Windows libraries (SDL, dear imgui, libuv) * Fix incorect VIA debug window T2 mode display * Fix incorrect teletext graphics glyphs * Fix a couple of teletext graphics display issues * Drop support for 32-bit Windows

* add .adf disk image support * fix dodgy saved states UI rendering * [macOS] fix Caps Lock * [macOS] show b2 version number in the About box and in Finder

* add column headers to hex editor * upgrade to latest SDL (For various reasons, this means b2 will in future use OpenGL rather than D3D on Windows. Hopefully not a problem! It doesn't do anything very complicated)

* fix some package/build issues * add video writing support to Mac version * Mac version now requires Mac OS X 10.9 or later

Fix various accuracy and UX issues. * revamp keymap and configs UI * much-improved CRTC accuracy, thanks to [Chris Evans](https://stardot.org.uk/forums/memberlist.php?mode=viewprofile&u=11307&sid=bf6b30780673ddbcb982ce465aa5aadd) * much-improved VIA accuracy, thanks to [Rich Talbot-Watkins](https://stardot.org.uk/forums/memberlist.php?mode=viewprofile&u=386) * fix a few Video NuLA issues

Fix various UX and emulation accuracy isssues. With particular thanks to [Chris Evans](https://stardot.org.uk/forums/memberlist.php?mode=viewprofile&u=11307&sid=bf6b30780673ddbcb982ce465aa5aadd) and [Rich Talbot-Watkins](https://stardot.org.uk/forums/memberlist.php?mode=viewprofile&u=386). * fix various emulation issues: teletext, CRTC, VIA, Master RTC, Master CPU * fix problems with hi-DPI screens on macOS Catalina * improve debugger hex editor * improve keyboard-related UX: better default layout, improved editing UI * improve automated tests (mostly not interesting, but should help head off regressions in future...)

Improve sound emulation. * fix NOISE1 test from https://stardot.org.uk/forums/viewtopic.php?f=4&t=17537 * fix sampled sound: Spy Hunter, ReetPetite, tyb-enjoy, Speech.dsd * fix Spy Hunter front end and game sounds * tidy up SN76489 trace formatting

# All * improve 6845 accuracy * fix SN76489 noise issue * fix disc writes in Watford DDFS * generally improve debugger: improved UI, data breakpoint support * simplify timeline UI * add support for BeebLink

# All * Fix dodgy scrolling in Planetoid * Fix potential hang on startup in Snapper-V1

# All (Debug version) * When recording events, by default store only the last ~30 seconds'-worth, so tracing can be left on without the memory consumption constantly growing. The previous behaviour is still available

# All * Sound emulation fixes * fix write handling (WIP - but fixes Repton 2 speech tone) * fix frequency=0 * add tracing * improve speed recording traces when VIA IRQs aren't acknowledged

# All * improve sound (hopefully) * add missing credits to licence file

# All * add emulation of 16MByte external paged memory via 1MHz bus (thanks to https://github.com/TheEnbyperor)

# All * improve sound (thanks to https://github.com/hexwab)

# OS X * fix hang on startup when Macbook Pro with discrete GPU switches GPUs

# All * fix hangs when using HTTP API

# All * tabbed/docking window management * configurable keyboard shortcuts * authentic "brr..." noise on startup # All (Debug version) * HTTP API * integrated GUI debugger # Windows * YouTube 720p-friendly video output option

# All * remove UI filtering option * update BBC display filtering immediately * move BBC filtering option into main options dialog * improve Mode 7 appearance # Windows * fix D3D9 UI rendering, hopefully in all cases * remove UI half-pixel offset option, now that the UI rendering is hopefully fixed... * fix D3D11 rendering # OS X * fix `unknown short option: -p` error * save settings when quitting using `Quit` from the OS X menu bar