Release of the new stable version of the PlayStation 2 emulator - PCSX2.

Overview of key changes:

https://pcsx2.net/blog/2025/pcsx2-2.4_2.2/

The latest Sega Saturn emulator - Ymir, has been updated.

New features and improvements
- App: Added command-line option -P to force emulator to start paused
- App: Added new Tweaks tab to Settings window consolidating all accuracy, compatibility and enhancement settings
- App: Added option to create internal backup RAM files per game
- App: Added option to override UI scale
- App: Added option to toggle fullscreen by double-clicking the display
- App: Added recent games list to File menu
- App: Automatically center Settings window when opening it
- App: Close windows when pressing B or Circle on gamepads while nothing is focused
- App: Enable gamepad navigation on GUI elements
- App: Store relative paths in Ymir.toml
- App: Use window-based DPI to adjust UI scale, allowing the UI to adapt to displays with different DPI settings
- Backup RAM: Support interleaved backup image formats such as the ones produced by Yaba Sanshiro or the MiSTer core
- Backup RAM: Support standard BUP backup files
- SCSP: Added option to increase emulation granularity for improved timing accuracy
- SCSP: Double-buffer DSP MIXS memory
- SCSP: Implemented MIDI In and Out
- SCSP: Interleave DSP execution and slot processing
- VDP1: Added option to replace meshes with 50% transparency
- VDP1: Clip sprites to visible area to speed up rendering, especially of very large sprites
- VDP: Added option to deinterlace video
- VDP: Added option to move VDP1 rendering to the emulator thread to improve compatibility with some games (e.g. Grandia)

Fixes
- App: Fix rare crash when loading a backup memory image in the Backup Memory Manager
- App: Fix window scaling on macOS Retina displays when using HiDPI mode
- App: Prevent loading internal backup memory image as backup RAM cartridge image
- CD Block: Start new playbacks from starting FAD when previous playback has ended. Fixes WipEout freeze after SEGA logo
- Media: Fix pregap handling in single BIN images
- SCSP: Apply DAC18B to output. Fixes quiet audio in many games
- SCSP: Fix loss of accuracy on MIXS send level calculation
- SCSP: Fix send level, panning and master volume calculations
- SCSP: Fix slot output processing order
- SCSP: Fix swapped DAC18B and MEM4MB bits
- SCSP: Run one additional DSP step to fix FRC issues
- SCU, SH-2, SMPC, SCSP, VDP: Numerous fixes to interrupt handling. Fixes intermittent Rayman inputs and some audio glitches
- SCU: Various DSP accuracy fixes
- SH2: More fixes to FRT, WDT and DIVU
- SMPC: Cancel scheduled command processing event when resetting SMPC. Fixes a long hang after hard resetting in some cases
- SMPC: Change fixed bits from 111 to 100 in TH/TR control mode responses for the first data byte of the Control Pad and 3D Control Pad peripherals. Fixes Golden Axe booting back to BIOS
- SMPC: Eliminate spurious INTBACK interrupts
- SMPC: Prevent COMREG writes when a command is in progress. Fixes some boot issues leading to the "Disc unsuitable for this system" message
- SMPC: Prevent optimized INTBACK report from occurring unless a continue request was sent. Fixes input issues with Yaul-based homebrew
- SMPC: Prioritize INTBACK continue requests over break requests
- System: Tighten synchronization between the two SH-2 CPUs and remove artificial timeslice limit. Improves performance and fixes Fighters Megamix and Sonic Jam intermittent boot issues
- VDP1: Lower command limit to work around problematic games that don't set up a terminator in the command table
- VDP1: Significantly slow down command execution when running the VDP1 renderer on the emulator thread. Fixes Dragon Ball Z - Shinbutouden freeze after SEGA logo
- VDP2: Apply horizontal mosaic effect to rotation background layer. Fixes missing effect on Race Drivin' Time Warner logo
- VDP2: Apply window effect to sprite layer. Fixes graphics going out of bounds in many games
- VDP2: Check for invalid access patterns to determine if NBG characters should be delayed. Fixes background offsets in many games
- VDP2: Disable NBG1-3 only if both RBG0 and RBG1 are enabled simultaneously
- VDP2: Honor access cycles and VRAM bank allocations to restrict pattern name and character pattern accesses. Fixes garbage graphics in Panzer Dragoon Saga, Sonic 3D Blast and Street Fighter Alpha/Zero 2
- VDP2: Invert back screen color calculation ratio. Fixes black background on Sakura Taisen FMVs
- VDP2: Move existing VCounter into VDP2 VCNT register. Fixes Assault Suit Leynos 2 freeze when going in-game and King of Fighters '95 not booting
- VDP2: Synchronize background enable events with the renderer thread. Fixes FMV slicing issues on slow machines on Sakura Taisen
- ymdasm: Fix SCU DSP unconditional JMP disassembly

The Atari ST - Hatari emulator has been updated.

Emulation improvements:
- 030+MMU:
 - Workaround to correct prefetch data after bus errors
- DSP:
 - Fix: JMP can also form a long interrupt instruction
- VME/SCU:
 - TT / MegaSTE SCU registers and interrupts implemented
- Falcon Videl:
 - Refresh rate of monochrome monitor is now correctly detected with 71 Hz
- MegaSTE:
 - Add support for CPU Freq / Cache control at $FF8E21 when running in cycle accurate mode. This gives cycle exact memory accesses when running at 16 MHz, as well as emulation of the external 16 KB cache
- SCSI:
 - Fix REQUEST SENSE for SCSI v2
- Serial Ports:
 - Update values of DCD and CTS signals for the RS232 port connected to the MFP (as reported by the underlying OS)
 - Add support for using TCCLK as RTxCB clock for the Atari TT's SCC
- Video:
 - Improve support for 4 pixel hardscroll by stopping shifter with $FF8260=3. Also handle $FF8261
- MFP:
 - Fix counter when timer is stopped/restarted while counting from 1 to 0
 
Emulator improvements:
- SDL-GUI (and config options):
 - Improvements to GUI font characters
 - Add separate option for enabling/disabling >=030 CPU data cache
 - Fix: file selector exit with keyboard
- Windows:
 - Open console window for error and help output, so that Windows users can actually see them
- Keyboard / TOS localization:
 - Symbolic key mapping improved for different TOS language versions
 - Made it possible to use a mapping file with fallback to scancode mapping
 - New "--fast-forward-key-repeat" option for key repeat
 - (EmuTOS v1.4) Catalan country code support
- Memory snapshots:
 - Fix: re/store all relevant YM2149 & MMU state variables
- Joysticks:
 - Fix: segfault with negative joystick indexes
- GEMDOS HD:
 - Fix: Fattrib() call on a directory
 - Fix: Return correct attrib for volume labels in FsFirst()
 - Fix: Fsnext() calls with DTAs having different attribs, when DTA is not from preceding Fsfirst() but earlier one
 - Fix: Handle additional '*' chars at end of file mask
 - Fix: Dfree() total/free on really large disk, free on Mac/BSD
- SCC:
 - Fix: invalid channel B file close on uninit
- SCSI:
 - Add CLI + config file option for (per ID) SCSI version
- Command FIFO:
 - Fix crash when FIFO gets command right at Hatari start
- Debugger:
 - Fix: DSP RESET instruction tracing
 - Similarly to Atari program symbols override, load TOS symbols on TOS load, if autoloading is enabled and .sym file is present
 - Add "find" command for searching CPU memory contents
 - Add "struct" command to better show contents of program's structures
 - Variable & debug symbol names can be given directly also to load, save, memwrite and register commands in addition to numeric values
 - File name completion for commands having optional file name args
 - Symbol name completion for "loadbin", "savebin" & "dspsymbols" commands
 - Align "memdump" character representation also when line is not full
 - Show also non-ASCII Atari chars in debugger memory content output
 - Add 'c' (character) argument type support for "memwrite" command
 - CPU disassembly shows resulting relative branch addresses
 - "dspreg" command shows also stack contents
 - When disassembling, translate logical addresses to physical ones if MMU is enabled
- Tracing:
 - GEMDOS Dsetpath() + Frename() calls included to "os_base" traces
 - PC value added to more traces

The emulator of the Soviet computer Vector-06C has been updated.

Features:
- Added option to search by labels in the Disasm window
- Added drag-and-drop file loading
- Added Lua script support with DrawText, DrawRect, and DrawRectFilled functionality, CPU, and memory access. Negative positions originate from the bottom right corner
- Added Code Perf window to test code performance. It's auto data stored as part of debug data on disk
- Added a tooltip in the watchpoints window that shows a hex and ASCII dump of up to 256 bytes
- Added a tooltip to watchpoints with data represented as a string and a hex dump into Hex Window
- Added the M register indication in the Hardware Stats window
- Added a console option to run rom/fdd/rec if it’s the first and only argument after the emulator executable name

Updates:
- The Disasm search, HexViewer search, DebugData filter no longer require pressing Enter
- Highlighted updated Hardware Stats, and independent CPU registers in the Stats Window
- The default window background became darker to improve the contrast
- The color scheme is stored in settings
- Execution speed is now stored in settings
- The frame slider in the record window now takes the full window width
- Watchpoints and breakpoints now store debug data as strings for readability
- Updated readme
- Removed wstring from the project to resolve issues with Win11/Win8/Linux builds
- Commented out SDL buffering notifications in the log
- Increased recording time from 1 to 10 minutes
- Increased trace log length from 100,000 to 300,000 commands

Bug Fixes:
- Fixed value representation in the Breakpoint window
- Corrected disassembly of DB instructions in the Disasm window
- Fixed Step Over to always take 12 cycles for j* instructions
- Fixed switching from MAX speed execution to Normal, which previously took a long while
- Fixed the minimum length of watchpoints
- Fixed Trace Log update when RST7 is invoked
- Fixed OUT N to output data by the next command execution
- Fixed 1% CPU speed mode
- Fixed crash during file reload
- Fixed -path argument handling
- Fixed code line selection highlight to properly highlight the navigated line
- Fixed highlight for the next executed line
- Fixed debug data loading when the working directory doesn’t match the executable directory
- Fixed crash when settings or debug data JSON files had a broken format
- Fixed debug data loading issue with FDD image
- Fixed loading/saving of ram-disk image and imgui.ini file from working directory to executable directory
- Fixed the wrong number of searched addresses in the Search window
- Fixed issue with wrong debug data loading
- Fixed the GCC build issue with the DPI detection function

The PlayStation Portable console emulator has been updated - PPSSPP.

What's new in 1.19
 Audio
 - Brand new sceAtrac implementation, fixing Flatout and multiple other long-standing issues!
 - More correctly implemented sceAtrac-through-sceSas functionality, fixing voice in Sol Trigger and multiple minis
 - Better support for using sceAudiocodec directly, fixing music in some homebrew apps
 - Volume control improvement

 Rendering fixes and performance
 - Important: This will be the last major version with D3D9 support. D3D11 will of course continue to be supported, along with Vulkan and OpenGL
 - Fix smoke effects in Jak'n'Daxter by re-using the fix from Ratchet & Clank
 - Software depth buffer rendering added to fix lens flares in multiple games efficiently (Midnight Club LA, Wipeout, Syphon Filter etc)
 - Multiple rendering-related crash fixes
 - Texture replacement load speed corrected and can now be controlled (#20286), regression fix for zipped packs
 - Additional assorted compatibility and other fixes
 - Persona 1/2 readback fixes
 - Other correctness fixes

 General emulation
 - Allow disabling HLE on a per-module basis (if games ship the module so we can load it). Enabled for sceCcc, and more importantly scePsmf, fixing multiple issues
 - Additional module loading improvements
 - More precise sleep function on Windows
 - More replacement texture improvements, allow replacing game icons
 - Disable certain features like fast-forward when networking is on, to avoid de-syncs
 - Fixes mono Atrac3 as video soundtrack
 - Improvements to RISC-V support

 Control and input
 - Touch gliding support added
 - Allow simultaneous DInput and XInput input

 New "Dear ImGui"-based PSP debugger: ImDebugger
 - Allows very rapid development of debugging features as-needed, and also implements a pretty good Ge debugger for stepping through draws
 - Unlike the old Win32 debugger (but similar to the unmaintained web debugger), works on all platforms (though cumbersome on touchscreens)
 - Major commits (though there are many more)
 
 Multiplayer
 - Added Infrastructure multiplayer support, with automatic DNS configuration
 - Implement more of sceNet (prerequisite for the former feature)
 - Socket re-mapping implemented
 - Assorted bugfixes, thanks ANR2ME
 
 UI
 - Loading spinner now actually spins properly, the app no longer appears to hang
 - Minor features: Asks for confirmation on exit in most scenarios, DPI scaling, can pause without menu
 - As usual a lot of tweaks, perf fixes, and fixes for hangs and crashes
 - Two new color themes, related themability fixes
 - Improvements and bug fixes in the savedata manager
 - Add "Move to trash" deletion funcionality to multiple platforms
 - Add ability to take "raw" screenshots of gameplay
 - More files can be loaded directly from ZIP
 - Developer Settings are now tabbed for easier access
 - Switch to the full libpng API so we can disable gamma correction, like the real PSP
 - Support displaying the battery percentage on more platforms
 - Allow picking a background image on iOS
 
 Platform compatibility
 - Exclude older Macs from using Vulkan (too many black screens, hangs)
 - Use portable-file-dialogs to provide file-open dialogs on Linux
 - "Cache full ISO in RAM" is now correctly hidden where it doesn't work
 - Now rendering at proper resolution on newer Macs
 - Mouse input improved on Android, including separate button mapping
 - Use the correct font again on Mac/iOS
 - Multiple file access optimizations made to make the most out of the flawed foundation called Android Scoped Storage

The Atari Jaguar console emulator has been updated - BigPEmu.

- Added some more unaligned read/write edge case handling. This addresses a problem in Theme Park, possibly among other things
- Changed some undocumented RISC instruction behavior to match some of my local hardware tests. One of these changes is known to correct an issue with object directions in Defender 2000
- Added more Jaguar GD functionality. Filesystem functions are stubbed out, but I wasn't sure if anyone really needs/wants this fully implemented, so let me know if it's important to you
- Fixed a few "undefined" Blitter cases (not known to affect any existing titles)
- Linux ARM64 builds are now part of the automated build set. Special thanks to cubanismo for guiding me through the minefield of cross-compiling for ancient Linux targets
- Significant improvements to the network rollback functionality, propagated back from BigInstinct
- All kinds of new platform/framework functionality, also propagated back from BigInstinct. I didn't feel like going through hundreds of changes to make a coherent summary, but one of the more notable additions is a byuu-style run-ahead option
- Exposed a bunch of sound spatialization functionality to the scripting API
- Exposed MOD and MP3 playback to the scripting API
- Added a timing fix for Val d'Isere Skiing and Snowboarding
- Various developer build changes to more accurately reflect hardware and/or detect errors which would break on non-developer builds (this includes enabling M68K address exceptions)
- Lots of "anti-emulator" code will be failing in developer builds at this point, and some related functionality may be propagating to non-developer builds soon; relying on inaccuracies to prevent your software from running in BigPEmu is unwise. If you really want to prevent your software from running in BigPEmu, contact me about better/future-proof methods