General - CPU - MCS48 - Added I8042 CPU type - Fixed IRQs + Added opcodes $02,$08,$22,$35,$40,$41,$60,$61,$65,$86,$89,$8a,$90,$c7 and $d6 + Fixed opcodes $10,$11 and $57 Sega GameGear - Added Master System video compatibility - Added CodeMasters Mapper extra RAM NinjaKid II HW - Added dipswitches - NinjaKid II: Added PCM sound - Atomic RoboKid: Added driver with sound StarForce - Updated ROMs names Sega System 16a - Added PCM sound The New Zealand Story HW - Extermination: Added driver with sound

- Added preliminary PlusROM support for saving high scores - Added preliminary support for 'MVC' bankswitching scheme by Rob Bairos - Added web links for many games - Added dead zone and linearity settings for analog controllers - Added 'Check for Update' button to Help dialog - Added different mask patterns for scanline emulation - Fixed MindLink controller - Fixed SaveKey not working with QuadTari - Added TIA randomization on startup option - Added different debug color luminances for player and missile copies - Added hotkeys for TV roll speed and toggling 'Developer settings' sets - Debugger: enhanced prompt's auto complete and history - Debugger: added optional logging of breaks and traps - Debugger: added Thumb cycle counting

[changes] - Display: Dropped support for DirectDraw and OpenGL - Input: Relative mouse binding and 5200 trak-ball speeds have been adjusted for better uniformity. Existing input maps may need to have their speeds adjusted - Platform: Dropped support for Windows XP/Vista; Windows 7 or higher is now required - UI: Keyboard shortcuts have been reset to default to fix a bug with them being stored in the wrong place and to only store changes from default shortcuts - UI: Default shortcuts for toggling audio channels have been changed from Ctrl+Alt+[1-4] to Alt+Shift+[1-4] to fix a conflict with some AltGr+key bindings in the Spanish keyboard layout [features added] - Additions: Replaced ALTXEP8F.SYS fast XEP80 driver with ultra-speed ALTXEP8U.SYS driver with symmetric 31Kbaud communication - Additions: Added ALTXEP8P.SYS and ALTXEPUP.SYS variants with auto-switching to PAL (50Hz) on initialization - Additions: Added XEPVHOLD.COM utility to improve XEP80 video timing compatibility with modern displays - Cassette: Added support for KSO Turbo 2000 - Cassette: Added new level-based turbo decoding filter - Cassette: Added FLAC decoding support - Cassette: Added feature to hold data line across VBI to increase reliability of OS C: reads - Custom Devices: Scripting support added for break, while, do/while, and forward declarations - Custom Devices: Added support for creating alternate video outputs and PBI IRQs - Debugger: On-screen watches can now update continuously as well as per-frame - Debugger: Watch expression (wx) now has options for hex formatting - Debugger: Extended cartridge bank debugging support to MaxFlash 1Mbit and SDX 64K/128K cartridge types - Debugger: Memory window now supports scrolling, variable width, and graphics decoding - Debugger: Improved speed of console output window - Debugger: Added .fpaccel command to selectively toggle math pack acceleration routines - Debugger: Effective addresses are now shown in history in 65C816 mode - Debugger: Added .pagesums command - Debugger: lft -u option enables logging with microsecond timestamps, and -r enables raw timestamps - Debugger: "Auto-reload ROMs on cold reset" setting is now saved - Debugger: Go frame (gf) command now has a quiet (-q) option - Debugger: 65C816 M/X mode handling can now be configured in the disassembly window - Debugger: .diskdumpsec now has invert (-i) option - Debugger: Added debug link support to receive SDX symbol information from ATDEBUGX.SYS driver - Debugger: Added 'dbx' command to evaluate an expression over a range - Debugger: Added verifier options for detecting stack wrapping and stack in page zero - Devices: Added Percom AT88-SPD emulation - Devices: Percom AT-88 emulation now allows 1791/1795 FDC selection - Devices: Added SIDE 3 emulation - Devices: Added virtual hard disk device that translates a read-only host directory to a FAT16, FAT32, or SDFS partition image - Devices: Added temporary write filter hard disk device - Devices: Added preview SoundBoard 2.0 emulation - Devices: Added 1090 80 Column Video Card and Bit 3 Full-View 80 emulation - Devices: Added parallel port buses to all devices that support printer output and file writer device to sink printer output to a file - Disk: Disk rotational positions are now randomized on periperal reset - Disk: ATR loader now matches 77-track disk geometries for 8" disks - Disk: Added support for Happy 810 Autospeed mod - Disk: Percom RFD-40S1 double-clock mode is now implemented - Disk: Added option in Disk Drives dialog to show location of mounted disk images in File Explorer - Disk: Added full emulation for the Atari 815 disk drive (read only) - Disk: Added support for reading from and writing to Indus GT CP/M 2.2 filesystems - Disk Explorer: Added options to import/export files with text (line ending) translation - Display: New Palette Solver in Adjust Colors dialog to derive color parameters from a palette file or photograph of a palette image - Display: Added white monochrome mode - Display: Added option to constrain mouse pointer to active display in full-screen mode - Display: Added high dynamic range (HDR) display support (requires Windows 10 / DXGI 1.6) - Firmware: Warn if ROM image being added is blank - Firmware: Added autodetection of 1200XL rev. 11 OS and 1050 rev. H - HDevice: Lifted 16MB file size limit for untranslated access (H1-H4:) - IDE: VHD differencing mode images can now be mounted - Input: Added support for XInput 1.4 - Input: Added an option to use the Raw Input API (Configure System > Input) - Input: Added an option for immediate potentiometer updates to reduce paddle and 5200 controller latency - Input: Mouse, trackball, and 5200 controllers now accept mouse delta bindings to Left/Right/Up/Down, and paddle controllers accept digital bindings to Left/Right - Input: Added preset template generator for input maps to make it easier to set up less common controller setups - Input: Ctrl/Shift are now optionally blocked from virtual key mappings when used by input maps with the 'share' option off - PerfAnalyzer: Added trace channel for SIO command state - Platform: Added option to poll virtual disk and H:/PCLink sources for systems that have broken file change notifications - POKEY: Improved audio filters for better performance and aliasing rejection - Simulator: Added centralized randomization control under boot options - Simulator: Throttling code updated with waitable timers for better efficiency - UI: Dark mode improved with reskinned buttons - UI: Added option to auto-hide menu in windowed mode - UI: Added advanced configuration dialog to expose hidden, unsupported parameters - UI: Performance analyzer now supports dark mode - UI: Added /reset to load last profile without the device tree - UI: Right-clicking on a menu item now provides a direct path to open Keyboard Shortcuts to bind a key to that menu item - UI: Added /tapepos to pre-seek tape to specified position - XEP80: Improved accuracy of XEP80 bit and byte timing based on measurements on real hardware - XEP80: Added NS405 FIFO timing emulation

- Fixed math bug related to unsafe register access (demo0006.o now works) - Fixed bug in counters - Slightly improved CPU timing - Fixed multiple errors related to hardware collisions (fixes Flappy Bird and other)

- Stricter parsing of the configuration file and numeric setting values, with error messages now containing line numbers when relevant - Added setting "video.force_bbclear", default value of "0", which when set to "1" will force clearing of the backbuffer before drawing every frame - Added setting "video.cursorvis", default value of "hidden", to allow for showing the windowing system's mouse cursor within Mednafen's window even when it's not required - Implemented an M3U recursion limit of 9, adjustable by the new setting "cd.m3u.recursion_limit" - Implemented a limit of 25 on the total number of CD images loaded while processing M3U files, adjustable via the new setting "cd.m3u.disc_limit" - Added Zstandard decompression support to game loading, with both naked files("zst" extension) and ZIP archives - Added support for loading CD images from ZIP archives when the "cd.image_memcache" setting is set to "1". The ZIP archive may be loaded directly, or indirectly via an M3U file. An M3U file may also exist within the ZIP archive, to allow loading multiple CD images from within that ZIP archive. However, loading from a ZIP archive within another ZIP archive is not supported - Changed the naming of save games, save states, etc. for gzip-compressed games. Previously, a gzip-compressed file named like "whatever.nes.gz" would generate a save game named like "whatever.nes..sav", but will now generate a save game named like "whatever..sav", the same as if "whatever.nes" had been loaded instead of "whatever.nes.gz". The old behavior may be restored by setting the new undocumented setting "filesys.old_gz_naming" to "1" - SS: The emulated reset button mapped to Mednafen's reset command key(F10 default) will now respect the "input.ckdelay" setting - SS: The VA0/VA1 motherboard's memory mapping behavior for Low-RAM is now emulated instead of VA2's, to fix a crash in "Myst" in the generator room - SS: Fixed unresponsive input in "Discworld" - SS: Fixed startup abort to CD player screen in the Europe and USA releases of "Primal Rage" - SS: Fixed abort to CD player screen when trying to start a game demo in Gremlin Interactive's "Demo Disc" - SS: Fixed inability to skip the intro FMV in "Senkutsu Katsuryu Taisen: Chaos Seed" - SS: Fixed flickering title screen in the "Saturn Super Vol. 2" demo of "Golden Axe: The Duel" - SS: Fixed a regression introduced in 1.26.0-UNSTABLE that broke the CD audio player in the North America/Europe BIOS - SS: Implemented emulation of the CD block Scan command, to allow the scan forward/backward functionality in the BIOS's CD audio player to work - SS: Fixed a bug in the CD seek handling code that could cause more emulator frame pacing and sound buffer underrun issues than strictly necessary when CD image memory caching is not enabled, the default - SS: Corrected a few inaccuracies in the relative timing between different SCSP EG rates and between different SCSP timer prescaler rates(probably with negligible audible effects in commercial game sound drivers) - VB: Added "left" and "right" options to the "vb.3dmode" setting, to allow for more easily showing only the left or right view

- Fixed GameBoy Printer response, Pokemon Card Game prints now - Added GameBoy Printer support for compressed data - Added GameBoy Printer support for palettes - Fixed GameBoy Printer grayscale range - Fixed HTML printout to avoid inserting repeated PRE tages - Added « Hardware | Print to HTML » option to VGB-Windows - Added -html and -utf8 options to VGB-Unix