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

New features and improvements
- Debugger: Add Priority Stack to VDP2 debug overlay
- VDP2: Various performance optimizations to the software renderer, improving performance in graphics-bound games (especially in high resolution modes). Technical details:
 - RBG1 was being unnecessarily rendered when NBG0 was enabled and RBG1 was disabled
 - Remove redundant transparency bit since priority zero acts as transparency
 - Remove various unused function arguments, reducing CPU register and stack pressure
 - Pass down VDP2 register references as arguments rather than fetching them from scratch everywhere
 - Reuse line data (i.e. skip recomputing lines) when rendering vertical mosaic
 - Bit-pack character pattern data in a single 32-bit value
 - Microoptimize scroll coordinates calculations
 - Rotation parameter table calculations:
  - Specialize calculations for (1) no coefficient table, (2) per-line coefficient table and (3) per-dot coefficient table
  - Hoist coefficient table enable and per-dot coefficients checks out of the loop
  - Make the inner loops SIMD-friendly
  - Avoid unnecessary computation of transparency and line color screen data if they are disabled
 - Microoptimizations to the compositor function:
  - Layer sorting now uses a combined key
  - Gather layer data in one single loop
  - Pixel fetching is now templatized and some bail out checks are done earlier
  - Color offset calculation enable flag is cleared in the fetch loop if no offset is actually applied

Fixes
- Debugger: Various SH2 stack analysis fixes
- Game DB: Add slow VDP1 flag to Funky Fantasy to fix slow FMVs
- Media: Detect postgaps in data tracks when the CUE sheet doesn't explicitly announce them. Fixes audio track shifts in bad Virtua Fighter 2 dumps
- Media: Fix PREGAP/POSTGAP handling in CUE/BIN dumps. Fixes shifted audio tracks in games dumped with ImgBurn
- SH2: Fix illegal slot instruction exception handling
- VDP1: Add game-specific flag for skipping command processing if the top of the table is empty. Enable it exclusively for Sekai no Shasou kara - I Swiss-hen - Alps Tozantetsudou no Tabi. Fixes missing graphics in Gungriffon
- VDP1: Disable early polygon drawing termination when rendering polygons when user clipping mode is inverted. Fixes clipped polygons around the minimap in Machine Head
- VDP1: Implement simple infinite loop detection. Fixes slowdown in the Mojave Desert stage (1-2) in Gale Racer
- VDP2: Apply color calculations to transparent sprite mesh on layer 0. Fixes stripes on ground plane in Gungriffon
- VDP2: Apply color offset to transparent sprite mesh on layer 0 in a separate step. Fixes missing spotlight in the Colonel battle in Mega Man X4
- VDP2: Fix VRAM access calculations when RBG1 is enabled. Fix missing car graphics regression in Gale Racer
- VDP2: Fix and use line color screen calculation ratio when LNCL is inserted. Fixes text background issues in Doukoku Soshite

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

New features and improvements
- App: Add command line option -F/--fast-forward to launch the emulator in fast-forward mode
- App: Always use installed mode under Flatpak
- App: Check for profile at the executable location
- App: Warn users about Flatpak filesystem permissions if the app is running in its sandbox and a disc image fails to load
- Backup RAM: Support in-memory and copy-on-write memory-mapped files in addition to regular memory-mapped files
- Build: Add simple feature flags system. All feature flags are enabled by default on development builds (including nightly builds)
- Build: Support Profile-Guided Optimization (PGO) builds
- Debugger: Allow scrolling the SH2 disassembly view
- Debugger: Colorize VRAM access timing slots in the delay viewer
- Debugger: Implement keyboard navigation and interactions in the SH2 disassembly view:
 - Up/down arrow keys: move cursor up/down one instruction
 - Page up/down: move cursor up/down one page
 - Home/end: move cursor to the top/bottom of the viewport
 - The cursor is kept below 15% of the top and above 35% of the bottom of the viewport
- Debugger: Manage SH2 breakpoints and watchpoints on the frontend and allow enabling/disabling them without removing from the list
- Debugger: Optimize SH2 breakpoints and watchpoints when debug tracing is enabled. They no longer become more expensive with the amount of entries added and the baseline cost is lower than before
- Debugger: Trace and display SH2 call stack
- Debugger: Trace and display SH2 data stack contents
- GameDB: Add new game-specific flags to improve compatibility:
 - Double the clock rate of the MC68EC000
 - Stall VDP1 drawing on VRAM writes
 - Slow down VDP1 rendering
 - Relax VDP2 bitmap CP VRAM access checks
- Input: Added support for mouse events
- Input: Capture mouse for light gun and mouse peripherals, supporting these modes:
 - System mouse: binds the system mouse cursor to a single peripheral. Mouse cursor is still available to interact with the GUI
 - Physical mouse: binds one or more mice to different peripherals. Disables the system cursor while any mice is bound.
NOTE: This option is only available on nightly builds due to issues with Virtua Gun. The System mouse capture option only works with Virtua Gun
- Input: Experimental Virtua Gun peripheral implementation
NOTE: This feature is only available on nightly builds at the moment due to issues in nearly all games. Only House of the Dead is known to work with minor reticle inaccuracy errors.
- Input: Implemented Shuttle Mouse peripheral
- MIDI: Force RtMidi to use dummy API if it fails to initialize, allowing Ymir to run without MIDI drivers
- Save states: Added actions to undo a save state and restore an undone save state
- Save states: Store one extra save state per slot for undo
- Settings: Show currently loaded profile path in Settings > General
- System: You can now select a preferred system variant (Saturn, HiSaturn, V-Saturn or Dev Kit) and Ymir will automatically pick a matching IPL ROM
- Video: Add option to enable/disable video synchronization in full screen mode
- Video: Allow selecting full screen resolution and target display
- Video: Allow switching graphics backends for GUI rendering

Fixes
- Build: Introduced separate x64-win-llvm toolchains for SSE2 and AVX2 support. Fixes Windows SSE2 builds requiring SSE4.2 instructions
- Build: Perform ad-hoc signature on macOS binaries to work around the "damaged" app warning
- Build: Remove duplicate binary from macOS packages
- GameDB: Double the MC68EC000 clock rate and force fast bus timings to fix crashes in Vampire Savior - The Lord of Vampire
- GameDB: Force-enable SH2 cache emulation to fix issues with multiple games:
 - Baku Baku Animal - World Zookeeper Contest (Europe only) -- freeze when trying to play FMVs from the Options menu
 - Chisato Moritaka - Watarase Bashi and Lala Sunshine -- crash at startup
 - Dragon Ball Z - Idainaru Dragon Ball Densetsu -- black screen after starting a new game
 - Emit Vol. 3 - Watashi ni Sayonara o -- FMV tearing
 - Metal Fighter Miku -- black screen after start menu
 - Spot Goes to Hollywood -- glitched graphics in European version only
 - Steamgear Mash -- flickering graphics
 - Waku Waku 7 -- flickering sprites
- GameDB: Force fast bus timings to fix crashes in Deep Fear
- GameDB: Slow down VDP1 to fix no-boot regression in Jikkyou Oshaberi Parodius
- GameDB: Slow down VDP1 to fix performance issues in Fishing Koushien II
- Input: Fixed analog to D-Pad axis conversion to not overwrite whenever an input was released in opposite direction
- MIDI: Defend against crashes when the library fails to initialize
- SCU: Timer fixes
- SH2: Block interrupts on instructions following LDC/LDS/STC/STS
- SH2: Cache emulation fixes
- SH2: Fix @(disp.PC) loads being decoded as stores for watchpoints
- SH2: Fix ldc/lds @Rm decoding from the wrong opcode bits for watchpoints
- SH2: Interrupt prioritization and triggering fixes
- VDP1: Fix handling of zero horizontal character size in CMDSIZE
- VDP1: Fix swap framebuffers race condition with threaded VDP1 rendering. Fixes flickering graphics in multiple games:
 - Actua Golf
 - FIFA - Road to World Cup 98
 - Gran Chaser
- VDP1: Increase PTM=1 drawing delay and apply it only during VBlank. Fixes flickering graphics on Earthworm Jim 2
- VDP1: Properly load save state data when threaded VDP1 rendering is enabled
- VDP1: Rework cycle counting method and increase cycle budget per frame. Fixes slowdowns in Road Rash and graphics glitches in multiple games, including Virtua Cop and Burning Rangers
- VDP1: Stall VDP1 drawing on VRAM writes exclusively on Mega Man X3 and Rockman X3 to fix garbled sprites
- VDP1: Stop processing commands if encountering an all-zeros entry. Fixes invalid clipping coordinates in Sekai no Shasou kara - I Swiss-hen - Alps Tozantetsudou no Tabi
- VDP2: Apply VRAM access shift per bank to scroll NBGs with invalid timing patterns. Fixes World Heroes Perfect title screen shift and Cyberbots - Fullmetal Madness HUD shift and broken background in stage 2
- VDP2: Clear normal shadow flag on transparent sprite pixels. Fixes shadows extending vertically across the screen in Tokyo Shadow
- VDP2: Compute vertical cell scroll delays/offsets when enabling/disabling the effect in addition to access cycle changes
- VDP2: Consolidate sprite data handling and fix 16-bit readout of 8-bit sprite data. Fixes garbled graphics in NBA Live 98 in-game
- VDP2: Convert the "allow bitmap data access during SH-2 cycles" hack into a game-specific flag and enable it only for games that display issues with the strict timing checks:
 - Lunar - Silver Star Story
 - Mechanical Violator Hakaider
 - Shin Kaitei Gunkan
- VDP2: Fix and optimize per-dot coefficient access checks. Fixes graphics glitches in Radiant Silvergun when starting a new game after interrupting the AKA-O boss fight in attract mode
- VDP2: Fix NBG per dot special priority calculations. Fixes priority issues in Mr. Bones
- VDP2: Illegal scroll CP accesses cause a shift if there aren't enough valid accesses in other banks and the illegal accesses occurs in the same bank as the PN access. Fixes fog background shift in Sonic 3D Blast
- VDP2: Illegal scroll CP accesses in low-res modes are handled differently between T0-T3 and T4-T7. Fixes gaps in backgrounds in X-Men vs. Street Fighter
- VDP2: Multiple VC accesses in the same timing slot do not cause extra delays. Fixes FMV glitches in Girls in Motion Puzzle Vol. 1 - Hiyake no Omoide + Himekuri
- VDP2: Sprite special pattern detection was short by one bit
- VDP2: Use only the first PN access to check for valid CP accesses. Fixes graphics shift in Daisuki and BattleSport

The Sony PSP emulator has been updated.

What's new in 1.20
User interface

New feature: Proper support for Portrait Mode UI - you can now rotate your phone to vertical mode, and things will mostly work fine! (#21185, #21044...)
New feature: Separate touch controls and display layout configs for landscape/portrait, new default touch control layout for portrait mode
New feature: Upload files via HTTP from devices on the same network
Savestate count limit can now be configured (#21112)
UI icons are now vector-based, making them look sharper on high-DPI screens (#20824, #20870)
Better handling of unsupported ISOs (#21169, #21166)
Misc: Improved text rendering, chat box improvements (#20653), PIC0 is now visible on the game screen (#20686), (#20611), rotation fixes (#21145), input fixes (#21248), fixes for XBox FullScreen Experience, background stretch (#21211), handle savedata in main game browser (#21277), Discord Presence improvement (#21246)
Show ICON1.PMF on the game info screen (#21303)
Regression fixes

In 7th Dragon, voice-related crashes are fixed (#20837)
Soundtrack is working again in Tony Hawk's Project 8 (#20775)
Fix crash in StormBasic homebrew apps (#20715)
Built-in songs in Beats work again (#20662)
Fix adhoc in Syphon Filter games (#20642)
Fix strange cutscene speedups in Power Stone 2 (Power Stone Collection) (#2124)
Work around game bug to help more custom songs play again in GTA LCS (#20692)
Multiplayer

Support aemu relay servers for AdHoc multiplayer (#21116, #21271)
Allow customizing the proAdhoc server list (#20718)
Controller and touch screen input

Native support for DualSense (#20580, #20620, #21191), DualShock and Switch Pro (#20647) controllers on Windows - including tilt controls for DualSense and Switch Pro
Misc touch screen improvements (#21195, #21197, #21258)
Graphics

Fixed multiple graphical effects in Tales of Phantasia X
Reworked the VSync setting to be more intuitive. It's now pretty much never a bad idea to turn it on.
Fixes for various glitches in Tales of Phantasia X (#21173, #21141, #21205)
Some more framebuffer readback workarounds (#20640, #20631, #20632)
MMPX upscaling enhancements by crashGG (#20622, #20541)
Huge rendering speedup in Brave Story (#21151)
Fix rendering bug caused by CPU emulation bug in ATV Offroad Fury: Blazing Trails (#21238)
Partially fix rendering problem in Mahjong Artifacts (#21244) and The Mystery of the Crystal Portal (#21236)
Boost the GPU in Outrun 2006 to avoid unnecessary slowdowns (#21304)
Other game fixes

Fix savedata problem in Silent Hill: Shattered Memories (#21294)
Audio

Added "Smooth" playback mode, which evens out glitches (while adding a very small amount of latency)
Remove DirectSound support (#20533), add support for ultra-low-latency streams on WASAPI, available on some devices (#20535)
Platform support

Windows
D3D9 support has been removed (#19951, #20490)
ARM64 is now officially supported, and works great (#20863)
Correct fullscreen mode in Xbox Fullscreen Experience (#21189)
Assorted improvements (#20778, #20774)
Android
The minimum Android version has been raised for technical reasons, KitKat is no longer supported (#19658)
Support for Android devices with 16KB page size. This is a technical change, required by Google Play, that unfortunately forced us to drop compatibility with the very oldest devices (Android < 5). (#20788)
Shortcut widgets can now be created even if the app isn't running (#20798)
Removed support for classic Moga controllers, these were only a thing on early Android (#20762)
iOS
Add support for screen rotation
Linux
Loongarch improvements by KatyushaScarlet (#20683, #20644, #20599, #20594), text rendering improvements (#21163)
SDL fullscreen problems fixed (#21300, more)
Debugger

ImDebugger improvements (#20861, #20779, #20657, #20637, #20550, #20523)
Websocket debugger fixes (#20749)
Other

RetroAchievements: Upgrade the support library with perf fixes (#21081), various fixes and improvements
Add workaround for infamous God of War crash (#21148)
Fix assorted minor UI bugs (#21042, ...)

Another update (possibly the last) has been released by M3tro for his mod hack Dune2: Extended Full Version for the well-known game DuneII.
This update includes several minor bug fixes and some graphical changes aimed at improving the gameplay experience. Information about the 6-button controls has been added to the Mentat text in all five campaigns for those who haven't heard of it yet.
Two more disc images have been added to the four available for playing with CDDA music (with mode 1 support) on RetroArch or a real MegaCD console connected to the MegaDrive.

The Sega Dreamcast console emulator - Flycast has been updated. There are builds for Android, Linux, iOS, Mac OS X, Nintendo Switch, Windows and Xbox One/Series.

What's Changed
- Per pixel rendering with OpenGL ES on mobile
- Match code server for battle cable games (F355, Virtual-On Oratorio Tangram and others)
- Outtrigger and Power Smash online gaming support
- Integer scaling and choice of filtering for output frame
- Audio: improved frequency envelope generator
- Fixed major issue with Mali GPUs when using Per-pixel rendering
- DreamPicoPort fixes and enhancements
- Combos to trigger emulator buttons (Pause, Exit, etc.)
- DreamPotato support
- Configurable paths for BIOS, VMU and others, and UWP enhancements
- UI themes
- Better support for Thrustmaster wheels
- Panther DC controller emulation
- Improved arcade box art
- Improved on-screen keyboard support on Nintendo Switch
- iOS is no longer supported
- Texture upscaling is no longer available

Fixed Games
- Battle Racer (new)
- Doom 64 (rendering)
- Mushiking 2003 2nd (new)
- Sonic Adventure
- Mobile Suit Gundam: Federation vs.Zeon
- Dinosaur King (inputs)
- Zombie Revenge (inputs)
- Virtual-On Oratorio Tangram (Naomi, VMU support)
- Sega Tetris (Naomi, network)
- Spawn (boot)
- Block Pong-Pong (inputs)
- Sega Rally 2 (crash)
- Jet Set Radio (audio)
- King of Route 66 (microphone support)

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

New features and improvements
- App: Added "Take Screenshot" action to File menu
- App: Moved "Backup Memory Manager" action from File to System menu
- Debugger: Added Dump memory region button to the Memory Viewer to dump the currently selected region to a raw .bin file in the profile’s dump path
- Debugger: Display VRAM data access shifts separately from CP delays in the VDP2 VRAM access delay window and display them for scroll BGs as well
- Rewind: Reset rewind buffer on hard resets and whenever the CD Block LLE settings is changed
- Save states: Separated save states menu into Load and Save to avoid confusion and simplify interactions
- Updater: Added compile-time flag Ymir_ENABLE_UPDATE_CHECKS to enable or disable the automatic update checker, including the onboarding process
- VDP1: Reworked renderer code structure. Allows threading without affecting timings and paves way for other rendering backends

Fixes
- Settings: Properly reload binds for "increase/decrease speed by 25%"
- Updater: Create state/updates folder before writing .onboarded file in case the user opts out of automatic update checks. Fixes update check onboarding popup always appearing on startup
- Updater: Detect nightly -> stable update when the current version matches the stable version
- VDP1: Reduce VBlank erase timing penalty to fix graphics artifacts in Battle Garegga's options menu
- VDP2: Allow bitmap data access during SH-2 cycles. Fixes FMV flickering in Lunar - Silver Star Story, Shin Kaitei Gunkan, and Mechanical Violator Hakaider
- VDP2: Apply VRAM bank data access shift to scroll BGs. Fixes shifted borders in World Heroes Perfect's demo sequence
- VDP2: Disable VRAM access restrictions based on ZMCTL parameters. Fixes missing background graphics in Baku Baku Animal - World Zookeeper