[ATARI] Altirra x86 i x64 4.20

Altirra Version 4.20 [December 29, 2023]:

changes

• Command Line: Switches are no longer allowed at the end of arguments, e.g. disk.atr/f or /f/nosi. Switches must now be separate arguments.
• Input: Removed the extraneous hidden Button 1 input on light pen/gun controllers.

features added

• Additions: Added PHLOAD.COM to trigger peripheral handler loads via type 4 polling.
• Cartridge: Added Williams 16K cartridge type.
• Cartridge: Changed existing JRC cart type to JRC6 64K without RAM and added JRC RAMBOX cartridge type.
• Cartridge: Added MDDOS cartridge type.
• Cartridge: Added COS 32K cartridge type.
• Cartridge: Added Pronto cartridge type.
• Cartridge: CAR types 76, 78-93, and 160 are now supported without advanced configuration overrides.
• Cassette: Load Data as Audio option now supports raw FSK and PWM data blocks in .cas files.
• Cassette: BASIC auto-boot can now handle BASIC program tapes that require RUN "C" instead of CLOAD.
• Command Line: Added /[no]casautobasicboot, /kernelref, /basicref, and /diskemu switches.
• Debugger: Symbols escaped with '#' prefix can now include @ in their name.
• Debugger: .vbxe_traceblits command now has a compact mode.
• Debugger: .vbxe_bl command now has a compact mode and can dump a blit list at an arbitrary address.
• Debugger: Added explicit option in the disassembly window for whether the current D register state affects symbol lookup for direct page addressing modes.
• Debugger: bta (set tracepoint on access) can now supply a default trace message.
• Debugger: Math pack symbols can now be unloaded independently.
• Debugger: Added static trace PBI (stp) command to auto-trace parallel bus interface firmware.
• Debugger: Memory window now accepts arbitrary address expressions.
• Debugger: Ctrl+F in the history view moves focus to search box.
• Debugger: Added c (compare memory) command.
• Debugger: Added a menu command to export the debugger help from the .help command in HTML form.
• Debugger: @hwwritereg(addr) can be used to read back write-only system hardware registers.
• Debugger: The debugger now additionally tries to resolve source file references against the module binary path and the paths of any open source windows.
• Debugger: Source windows now have context menu options to reopen the file externally.
• Debugger: u (unassemble) now has -m option to change CPU mode used for disassembly.
• Devices: 1030 now does actual pulse/tone dialing.
• Devices: 1030 relay sound is now heard when phone is placed on-hook.
• Devices: Added SIDE 3.1 (JED 1.4) support.
• Devices: Added CPS SuperSALT Test Assembly support.
• Devices: MidiMate now exposes a serial port for custom MIDI interfacing.
• Devices: File writer device can now also be used with serial ports.
• Devices: Added networked serial port device.
• Devices: Added copy/paste support to devices UI.
• Devices: Added shortcut command to rescan a virtual FAT16/FAT32 disk.
• Devices: Added 835, full 835, and full 1030 hardware emulation.
• Devices: Added SIO serial adapter device to bridge serial devices directly to the emulated SIO bus without requiring motor control activation.
• Display: Added support for main display pan and zoom.
• Disk: Improved timing compensation when burst I/O mode is enabled.
• Input: Added support for Chalk Board PowerPad controller.
• Input: Added support for Stack Lightpen controller.
• Input: Mouse wheel can now be bound as an input.
• Input: Added an option to show pointer location when driving a tablet, pad, or light pen/gun with a non-mouse input.
• Input: Pad input area can now be moved and resized via Configure HUD.
• Network: Raised max MSS in emulation TCP stack from 512 to 1460.
• Network: Emulation gateway now supports ICMP echo requests (only to the gateway; not forwarded).
• Network: Emulation gateway now has a more distinctive Ethernet address to avoid conflicts when bridging through a VXLAN tunnel.
• PerfAnalyzer: Added support for saving and loading traces.
• PerfAnalyzer: Added trace channel for disk sectors passing under the drive head.
• PerfAnalyzer: Added approximated import for Atari800WinPLus 4.0 monitor execution traces (TRON/TROFF).
• * Save States: Devices can now opt-in to save state support.
• Save States: R-Time 8, XEP80, Black Box, MIO, Ultimate1MB, SIDE/2/3, and MyIDE[-II] are now included in save states.
• Save States: CPU mode, 65C816 high memory, and Axlon memory are now included in save states.
• System: Added 1400XL and 1450XLD emulation support (currently only minimal V:/T: support).
• UI: Added /registeruserfileassocs, /registersysfileassocs, and /unregisterfileassocs for silent registration/unregistration of file type associations.
• UI: Added support for screen readers to read out text from the emulation screen (opt-in).
• VFS: Added support for reading from .zip files that use Enhanced Deflate compression.
• VFS: Add special:// protocol to access specific images.

bugs fixed

• AltirraOS: Fixed incorrect MEMLO adjustment when loading peripheral handlers through CIO via type 4 poll.
• AltirraOS: Force C=1 on exit from CIO for compatibility (undocumented behavior).
• AltirraOS: Shift+Help and Ctrl+Help are now reported properly in HELPFG.
• AltirraOS: KEYREP and KRPDEL are now supported properly on the 65C816 build.
• AltirraOS: Improved compatibility of NOCLIK handling.
• AltirraOS: Fixed K: not applying inverse video to vertical bar ($7C) character.
• AltirraOS: Fixed timing issue in SETVBV.
• AltirraOS: S: now properly overrides the no-clear flag for GR.0.
• AltirraOS: FASC no longer clears first byte of FR0.
• AltirraOS: SIOV now resets BRKKEY when returning Break key pressed condition.
• Audio: Fix downmix setting not saving.
• Cartridge: Phoenix and Blizzard cartridge types now also react to CCTL reads as well as writes.
• Cartridge: SIC! 128K and 256K images now retain their original type rather than being converted to 512K on load.
• Cassette: Fixed FLAC decoder crashing on some files on some CPUs.
• Cassette: BASIC auto-boot detection now handles BASIC programs saved with the rev. B BASIC bug.
• Cassette: SIO data in line is now released when motor stops.
• Command line: Address specified in /soundboard switch was always overridden to default.
• CPU: 65C816 PLB and PLD instructions were not setting NZ flags.
• CPU: 65C816 PHP instruction could write bits 4/5 as zero after re-entering emulation mode from native mode with MX bits cleared.
• CPU: Improved accuracy of NMI timing when NMIs occur across a write to WSYNC.
• Custom Devices: Programmatic memory layer changes no longer bypass auto-PBI.
• Debugger: Zero page symbols were not being loaded from CC65 symbols.
• Debugger: PEI (dp) instruction no longer shows indirect data in disassembly.
• Debugger: Symbol lookup is now suppressed for (dp), (dp,X), and (dp),Y addressing modes with D != 0 like with other direct page addressing modes.
• Debugger: Fixed Step Over command not working above bank 0.
• Debugger: Disassembler now does basic block detection in 8048 mode.
• Debugger: Fixed .diskdumpsec command not working on virtual disks.
• Debugger: Fixed a crash when clearing breakpoints from debugger symbol based assert/trace directives.
• Debugger: Fixed panes that displayed the context menu at the wrong place when activated from the keyboard.
• Debugger: Debug display wasn't decoding IR mode 8 properly.
• Debugger: Improved visibility of keywords in source views in dark theme.
• Devices: R-Time 8 is now reset on a cold reset.
• Devices: SIDE 2 now returns floating bus data instead of $FF when reading from deselected CF card.
• Devices: Fixed sporadic initial interrupt state issue with MIO.
• Devices: Fixed some stack wrapping bugs with Veronica's 65C816 CPU.
• Devices: Fixed "use long path names" setting not saving properly on the H: device.
• Devices: H: no longer returns Y=$03 for imminent EOF when reading directories.
• Devices: MIDI output device from MidiMate is now reset on cold reset.
• Devices: Added missing emulation of IDE+2 CF detect in $D1FA bit 6.
• Devices: Fixed virtual FAT32 device limiting included files to FAT16 cluster limit.
• Devices: Fixed 8048 ADDC,@Rn and MOVP3 A,@A instructions and TF emulation.
• Devices: Fixed broken ATI0/1 commands for SX212.
• Disk: Fixed XF551 full drive emulation sometimes not handling write protect state properly.
• Disk: Reinterleave command wasn't marking the disk as modified.
• Disk: Fixed crash when attempting to convert a disk using an unknown or unsupported filesystem.
• Disk: Improved Happy 1050 memory map to closer match hardware, including contended regions.
• Disk: Add workaround for ATX disk images that have extra zero padding words at the end.
• Disk: Fixed 810, 1050, and XF551 based full drive emulators not consistently acting on write protect status.
• Disk: Improved accuracy when reading and writing sectors with missing data fields.
• Disk: Fixed rotational position being updated while motor is off.
• Disk: Fixed 810 post-read delay being used for 1050 emulation in single density.
• Disk: Improved timing precision for full disk drive emulators.
• Disk: Sectors are now ignored on mixed-density disks when not using the current density.
• Display: Fixed inverted field polarity detection in interlace mode (since 3.90) and improved auto-flip behavior.
• Display: Removed horizontal offset in PAL high artifacting.
• HLE: Set Y and C=1 in program loader to emulate CIO results when invoking init/run address.
• Input: Fixed paddles not responding when driven in absolute mode from a digital input (regression since 4.10).
• Input: Fix light pen not working in port 4.
• MMU: Extended RAM priority is now adjusted when U1MB is enabled to emulate difference in VBXE MEMAC behavior.
• Network: Fixed emulation TCP stack not sending final FIN packet to emunet after graceful shutdown from remote host.
• Network: Emulation dhcpd no longer reports a gateway to DHCP clients if routing is disabled (NAT off).
• Network: Fixed VXLAN tunnel code sending two extraneous bytes with each Ethernet frame.
• PerfAnalyzer: Fixed keyboard shortcuts not working in the perf analyzer's history view.
• PerfAnalyzer: Snapshot frame timing at end of session so VBI/DLIs don't get confused when emulation is restarted after the trace ends.
• PerfAnalyzer: Fixed crash in tape code after stopping trace with a tape mounted.
• POKEY: Improved accuracy of truncated/restarted POTGO scans.
• POKEY: Fixed stop bits not playing properly out audio channels 1/2 in two-tone mode.
• Recorder: Fixed bug with AVI writer not marking all uncompressed frames as key frames.
• Recorder: Fixed incorrect colors when recording WMV or MP4 video without scaling (ARM64 only).
• Save States: Fixed POKEY having keys stuck down after loading a save state.
• Save States: Fixed last 64K of extended memory not being saved properly in 128K and 320K memory modes.
• UI: Fix crash when using Calibrate Screen command without any hardware graphics acceleration.
• UI: Ensure that undocked tool windows are on-screen when restoring window layout.
• UI: Added workaround for Windows 10/11 touch keyboard sending the wrong extended key state for movement keys.
• UI: Fixed Input Setup controller diagrams displaying blank in some configurations.
• VBXE: Fixed incorrect blitter cycle speed for $00 bytes transformed by AND/XOR mask.
• VBXE: Blitter collision detection now returns the first hit instead of the last hit.
• VBXE: Fixed pixel shadows when using HR blit mode (mode 6).
• VBXE: Fix false P/M priorities on right half of screen in core 1.26 in lines that have no P/M graphics.

Altirra version 4.40 [December 31, 2025]

changes

• Display: Bloom radius has been reset due to different units.
• UI: Options have been merged from Tools > Options into System > Configure System. 

features added

• Cartridge: MaxFlash 1Mbit flash type is now selectable, including recent SST39SF010-based cartridges.
• Cheats: Cheat window is now modeless and resizable.
• Command Line: Specifying more than one image will now stack media slots in order.
• Custom Devices: Memory layers can now be auto-controlled based on OS/BASIC/Self-Test ROM visibility.
• Custom Devices: Improved error display when hot reloading the custom device definition file.
• Debugger: Improved SIODATA trace channel output.
• Debugger: Added .devices and .device_info commands.
• Debugger: Static trace (st) command now has -b option to trace through BRK instructions.
• Debugger: Added block detection support for Z80 disassembly.
• Debugger: .tracecio now reports AUX2 on open commands.
• Debugger: Implemented history for memory pane.
• Devices: Added full emulation for 850 Interface Module.
• Devices: Internal 850 R: handler now blocks Break during concurrent I/O instead of ending concurrent I/O when it is pressed.
• Devices: Standard 850 emulation is now more consistent with DTR/RTS state.
• Devices: Add device list is now sorted by name.
• Devices: Improve timing precision of Indus GT full emulation.
• Devices: Added The Pill device.
• Devices: Added the Black Box Floppy Board.
• Devices: Added Speedy XF disk drive.
• Devices: Added CSS Multiplexer.
• Devices: Added XM301 modem.
• Devices: Added named pipe serial adapter.
• Disk: Add option for reinterleaving to 4:1 SD for SuperSynchromesh.
• Disk: Improved timing correction when accelerating disk reads.
• Disk Explorer: Multiple files can now be exported at a time.
• Display: Added support for screen masks.
• Display: Move screen mask rendering to after color correction to reduce aliasing.
• Display: Improved scaling of bloom filter to different resolutions.
• Display: Added Direct3D 11 custom effect support.
• Display: Added NEON optimizations for PAL high artifacting.
• Firmware: Redesigned firmware dialog.
• Firmware: Added known firmware audit dialog.
• HDevice: Added support for MyDOS XIO 34 (Make Directory) and using XIO 33 (Delete) on directories.
• Input: Added paddle input emulation.
• PerfAnalyzer: Right-drag scrolling is now supported.
• PerfAnalyzer: Added native tracing mode, which profiles the emulator itself.
• PerfAnalyzer: Added option for video trace channel frame size and resizable splitter to change the height of the displayed video channel.
• Printer: 1020 plotter pen colors can now be customized.
• Printer: The printer UI pane now allows selecting between multiple printer outputs.
• Recorder: Added option to pause/resume video recording.
• Recorder: Added support for recording and playback of stereo SAP type R.
• Recorder: Added VGM recording and playback support.
• Simulator: Increased scanlines run at a time to slightly improve speed.
• UI: Added 850 error codes to error decoder.
• UI: Reduced flickering on drive indicators when using full emulation disk drives.
• UI: Removed title bar from docked panes and improved resizing behavior.
• UI: Increased splitter bar size slightly and raised drag thresholds to reduce accidental pane undocking. 

bugs fixed

• ANTIC: Fixed line buffer being cleared on blank lines.
• Cartridge: Improved emulation of SpartaDOS X pass-through cartridge port.
• Cartridge: Added reset button for The!Cart.
• Cassette: Fixed recording position not being reset properly when creating a new tape.
• Cassette: Improved accuracy of Vorbis decoding.
• Command Line: /profile command line switch is now case insensitive.
• Custom Devices: Fixed crash when attempting to create a memory layer directly mapping beyond the end of a segment without explicit offset.
• Custom Devices: Fixed a compiler crash when using nested anonymous functions.
• Custom Devices: Added support for unsafe calls, including the ability to issue UI commands.
• Debugger: Improved debugger UI state update when non-debugger commands are used to resume execution.
• Debugger: Fixed .pathdump command repeating instruction lines.
• Debugger: Fixed history view sometimes not displaying effective address on an instruction after stepping from a memory access breakpoint.
• Debugger: Fixed horizontal scroll problems with overscroll in memory window.
• Devices: Fixed Rapidus write-through improperly capturing writes to ROM or extended memory.
• Devices: 1090 registers are now always visible regardless of PBI enable state to match the known PAL equations.
• Devices: Booting off the 1030 with internal firmware now registers T: device properly.
• Devices: Fixed 1030 ModemLink and T: handler download with SIO acceleration enabled.
• Devices: SuperSALT test assembly voltage inputs now reflect computer model differences.
• Devices: Fixed some coprocessors losing cycles when single stepping.
• Devices: Fixed SIDE 3 not being switchable from a controlled cartridge port.
• Devices: Fixed SX212 speed not saving and emulation mode not switching properly.
• Devices: Fixed modem not dialing out to IPv6 addresses.
• Disk: Relaxed standard disk emulator requirements on command frames and ignore overlapping commands for most disk emulation profiles.
• Disk Explorer: Dragging out directories from a MyDOS disk no longer produces a bogus file.
• Disk Explorer: Fixed crashes and directory corruption issues in CP/M filesystem handler.
• Display: Fixed regression in D3D11 driver where bloom broke in full-screen mode.
• Display: Screen effects dialog no longer reports high dynamic range (HDR) is available when the display is configured for wide color gamut (WCG).
• Display: Fixed Enhanced CIO screen editor not wrapping characters properly on Delete Character commands.
• Firmware: The initial "autoselect" state for OS and BASIC firmwares is now always shown.
• GTIA: Fixed intermediate state when switching from CTIA to GTIA on the fly.
• HDevice: Current directory is now cleared on reset.
• HDevice: Long file name encoding/truncation now works for directories.
• HDevice: Fixed relative paths being parsed with the wrong unit's current working directory.
• HLE: Fixed a bug in the fast math acceleration hook for the normalization routine.
• HLE: CIO acceleration now supports multiple devices with the same name but different units, e.g. P3: and P6.
• IDE: CHS translation mappings now round down the number of cylinders instead of rounding up.
• Input: Fixed crash after XInput controller is disconnected.
• Input: Added workaround for Xbox Wireless Controller being detected twice through DirectInput.
• Input: Fixed regression with Keyboard Controller not reading properly in fast pot scan mode.
• Input: POT4-7 inputs are now grounded properly on XL/XE machines.
• PerfAnalyzer: Fixed CPU profile window breaking temporarily after saving a trace.
• PerfAnalyzer: Fixed scrolling artifacts with frame boundary lines.
• PerfAnalyzer: Fixed lockup when pressing Tab.
• POKEY: Improved accuracy of pot scan.
• Recorder: Fixed bitrate not being adjustable for H.264+AAC encoding.
• Recorder: Fixed memory leak when using MediaFoundation-based formats.
• Save States: Fixed bug with active POKEY IRQs getting lost.
• Simulator: Fixed booting a new image sometimes not cancelling a program load in progress.
• Simulator: Loading a program with Open Image no longer forces a cold reset.
• Modem: Fixed intermittent failure to disable Nagle on outgoing connections.
• Modem: Outgoing connections no longer force off server-side echo.
• Modem: Binary mode negotiation is disabled when CR/LF translation is enabled.
• VBXE: Fixed hires artifacts when using attribute map with 1.26 core and extended color, or hires switching at the borders.
• VBXE: Fixed bugs with attribute map horizontal scrolling.

Universal Hero (1987, Mastertronic)

Altirra 4.31 Final [February 8, 2025]:

• Cassette: Fixed a crash if decoding errors occurred while loading a raw tape.
• Devices: Fixed a crash when adding a device with certain nodes selected.
• Display: Fixed D3D9 gamma correction bugs in specific display configurations with bloom enabled.
• Display: Fixed crash when enabling frame blending at extended PAL height and artifacting enabled.
• Display: Fixed regression in NTSC high artifacting on ARM64 only.
• Input: Fixed console controller inputs being blocked in full-screen mode.
• Printer: Fixed rendering artifacts at edges when scrolling 1020 plotter output at high zoom.
• Printer: Fixed a crash when zooming in on 1020 plotter output on ARM64 only.
• UI: Fixed some cases of empty error dialogs when long operations are cancelled.

Altirra 4.30 Final [December 22, 2024]:

changes

• Display: Due to change in bloom algorithm, bloom settings have been reset to avoid conflicting with earlier versions. 

features added

• Cartridge: Added support for J(atari)Cart (104-111) and DCart (112).
• Cassette: Added Vorbis decoding support.
• Cassette: Added support for paired .data.cas+.audio.ogg files for more compact tape storage.
• Cassette: Added Turbo D support.
• Cassette: Added FSK speed compensation and crosstalk reduction options.
• Command Line: Added /cleardevices, /adddevice, and /removedevice switches.
• CPU: Added 23x multiplier option for 65C816 mode.
• Debugger: Added keyboard shortcuts to memory window.
• Debugger: Ctrl+Alt+click now reports scrolling offsets, pixel addresses, and VBXE information.
• Debugger: Added .vbxe_xdlhistory command.
• Debugger: .diskdumpsec command can now display INTERNAL text.
• Debugger: FDC and DISKEMU logging channels are now off by default.
• Devices: Added Microbits MPP-1000E modem.
• Devices: Added parallel-to-serial adapter device.
• Devices: Added 820, 825, 1020, 1025, and 1029 printers.
• Devices: Added Remove/Settings commands to context menu.
• Devices: Added 850 printer port support.
• Devices: Added $D600-D63F address range option for Covox.
• Devices: Added option for PBI-based CIO devices instead of using a hook page.
• Disk: Super Archiver emulation now supports slow speed.
• Disk: Added emulation of the BitWriter add-on for the Super Archiver.
• Disk: "Show disk image file" drive menu option now works for mounted images within .zip archives.
• Disk: ATX double density support is now enabled by default.
• Disk Explorer: Added MAC/65 file viewing mode.
• Display: Added support for deinterlacing interlaced video.
• Display: Added color correction support for targeting displays that use raw gamma 2.2 or 2.4 instead of sRGB.
• Display: Added emulation of long-persistence monochrome monitors.
• Display: Enhanced CIO text mode rewritten with screen editing, control character, and pass-through support.
• Display: Added adjustable PAL phase.
• Display: Reimplemented bloom with pyramid algorithm for narrower peak and wider long tail.
• Input: Light pen/gun is now insensitive to dark areas on screen.
• PerfAnalyzer: Added import support for Atari800 5.x monitor traces.
• PerfAnalyzer: Add "Go To Tape Editor" option when right-clicking on tape channel.
• Printer: ATASCII special characters are now converted to Unicode equivalents.
• Printer: Generic Printer (P:) device now supports translation modes for port output.
• Simulator: Added a speed option to take periodic rewind snapshots.
• Tape Editor: Added Select All (Ctrl+A) and Deselect (Ctrl+Shift+A).
• Tape Editor: Added FSK spectrogram view option.
• UI: Added screen reader support for word granularity.
• UI: Improved screen reader support in message boxes.
• UI: Added option to force program to efficiency or performance cores.
• UI: Added tool to scan for global hotkeys that block keyboard mappings.
• VFS: Improved handling of Unicode filenames within .zip archives. 

bugs fixed

• AltirraOS: Fixed P: compatibility issues with the 1025 printer.
• AltirraOS: P: device IDs are supported in XL/XE/XEGS mode.
• AltirraOS: K: and C: now support forced read mode (ICAX1 bit 0).
• AltirraOS: Modified cassette routine SKCTL usage for compatibility with PokeyMAX 4.
• AltirraOS: Fixed bug where checksum errors were not consistently returned from SIO.
• AltirraOS: Improved compatibility of C: handler with block control bytes other than $FA/$FC/$FE.
• AltirraOS: Improved compatibility of RBLOKV internal vector.
• AltirraOS: Carry flag is now checked for error after invoking cassette boot run address.
• AltirraOS: Boot screen is no longer re-displayed after printing Boot Error.
• ANTIC: Fixed playfield data read on cycle 106 overlapped with a refresh cycle and a pulled-up data bus.
• ANTIC: Added emulation of abnormal DMA caused by turning off playfield DMA mid-line.
• ATBasic: Fixed ICAX2Z handling issue preventing printing in sideways mode.
• Cassette: Fixed framing errors not being reported from during unaccelerated tape reads.
• CPU: Fixed 65C816 BRK instruction writing to wrong addresses in native mode with stack outside of page 1.
• Debugger: Register (r) command can now set S high byte in 65C816 native mode.
• Debugger: Fixed panes not adapting properly after debug font change if undocked.
• Devices: SuperSALT Test Assembly now supports External Audio test.
• Devices: Fixed SuperSALT Test Assembly bidirectional clock to audio input path.
• Devices: Fixed 8048 timer interrupt bug that prevented the 1450XLD parallel disk controller from shutting off the spindle motor.
• Devices: Fixed 32-in-1 handling of Select key and selection is no longer reset when bypassing menu with Esc.
• Devices: SIO and CIO acceleration now better supports the Break key.
• Display: Fixed incorrect gamma for Adobe RGB color matching mode with screen effect acceleration enabled.
• Disk: Adjusted ATX density detection to allow for enhanced density disks with no non-boot sectors on track 0.
• Disk: Fixed handling of DRQ bit when reading double density ATX disks.
• HLE: Improved overflow handling accuracy of FP acceleration handlers.
• IDE: Read Verify command fixed.
• Input: Keyboard input bindings are now released on key up even if Alt is pressed down in between the key down and key up.
• Printer: Fixed printer output going to printer window instead of printer port with P: CIO hook enabled.
• Save States: Fixed issue where sometimes P/M graphics would be missing after loading a state if P/M DMA was disabled.
• SCSI: Accept but ignore vendor command $0C to work around MIO 1.1 firmware issue.
• Simulator: Fixed issue where internal BASIC could sometimes be enabled on a 1200XL.
• Tape Editor: Reduced CPU overhead when updating checksum status with SIO decoded data capturing enabled with large blocks.
• Tape Editor: Fixed Ctrl+O shortcut.
• Tape Editor: Improved baud rate determination when converting to standard blocks.
• UI: Added workaround for blank window label on Windows 11 taskbar.
• UI: Added extra checking for Explorer's extended archive support, which doesn't support normal drag and drop interfaces.
• UI: Fixed bug where changing the hardware type in Configure Settings could also switch profiles.
• VBXE: Overlay and attribute map addressing are no longer reset at vertical blank.
• VBXE: Added emulation of one-scanline vertical offset for NTSC. 

Tree Surgeon (1983, Western Technologies)

Altirra 4.10 1/01/2023

changes

• Display: Direct3D 11 and borderless mode are now enabled by default for new installs.
• Input: Light pens and light guns have been split for 4.10+. Input presets may need to be updated and offsets readjusted.
• UI: ANTIC/GTIA visualization options have been moved to the Debug menu.

features added

• Audio: Added option downmixing stereo POKEY output to mono.
• Audio: Added 800 console speaker acoustics simulation.
• Cartridge: Added support for CAR types 71-75 (5200 Super Cart, bank 0 init version of MaxFlash 8Mbit).
• Cartridge: Added support for the XE Multicart.
• Cartridge: Added support for SIC+.
• Cassette: Added config variable to manually tweak balance between mark/space bit detectors.
• Cassette: Added support for PWM encoded turbo data in CAS files.
• Cassette: Added support for SIO data out controlled turbo (Turbo Blizzard).
• Custom Devices: The priority of memory layers can now be customized.
• Debugger: Memory locations can now be edited in the Memory pane.
• Debugger: Memory pane now has an option to display 8bpp graphics.
• Debugger: Randomize Memory on EXE Load option now logs when randomization occurs and uses the global randomization seed.
• Debugger: .loadobj and .loadmem now take VFS paths.
• Debugger: Added .error command to decode various error codes.
• Debugger: Added Breakpoints pane and Ctrl+B as a shortcut for a new breakpoint.
• Debugger: Added initial support for DWARF5 debugging information from LLVM-MOS .elf files.
• Debugger: Disassembly window now supports address expressions and mixed source/disassembly view.
• Devices: Improved selection behavior when adding or removing devices.
• Devices: NVRAM can now be isolated per profile and follows the temporary profile state.
• Devices: Added SimCovox support.
• Devices: Added shortcut command to temporarily mount VHD images in Windows to access FAT32 partitions.
• Devices: APT partitions on hard disks can now be opened in Disk Explorer.
• Disk: Added emulation of buffered track reads for Happy 1050 and Speedy 1050 devices in standard emulation mode.
• Disk: 810/1050 full drive emulations now warn on attempts to use double-sided disks that can't be read in those drives.
• Display: SDR/HDR balance in HDR mode can now use the system-wide SDR intensity setting.
• Display: Added support for DXGI 1.3 seamless custom refresh rate support on integrated display panels.
• Display: Reduced buffered frame latency in display paths.
• Display: Added adaptive speed option to lock to refresh rate for reduced latency.
• Firmware: Added detection of several XF551 firmware ROMs.
• HDevice: Added full long filename mode.
• HLE: Program loader now simulates SDFS disk in Disk Boot mode to auto-trigger EXE load under SDX.
• Input: Extended immediate pots option to allow support immediate light pen/gun inputs.
• Input: Added interactive tool to recalibrate light pen/gun offset.
• Input: Improved accuracy of light pen/gun trigger pulse timing.
• Input: Added an option for light pen/gun noise.
• PerfAnalyzer: Added support for exporting to Chrome tracing format.
• Tape Editor: Bit position is now marked purple if a single bit flip is identified that would fix a bad checksum in a standard block.
• UI: The Check for Updates dialog now has a link to the internal RSS feed used to deliver the new update info.
• UI: Added support for copying and pasting characters from the interactional character set.
• UI: Keyboard shortcut dialog now has better support for binding Alt+keys and is more keyboard accessible.
• UI: Added dark mode support for checkboxes and radio buttons.
• UI: Alt+click decode can now decode MyDOS error messages.
• UI: Paste can now paste visible control characters from Unicode.
• UI: Improved clarity of screenshots captured with true aspect ratio by changing image filter.

bugs fixed

• Additions: Fixed BRK instruction in LOADEXE.COM.
• AltirraOS: Improved compatibility of TIMFLG usage and initial register values on tape boot.
• Cartridge: Fixed banking issues with SIC! during flashing and when loading save states.
• Cassette: Accelerated C: loads now handle block reads with timeouts longer than 30 seconds.
• Cassette: Accelerated C: loads now set TIMFLG.
• Cassette: Fixed FLAC decoder errors with some files.
• Custom Devices: Blocked ++/-- increment operators to avoid confusion (they were parsed as pairs of unary operators, which was usually not intended).
• Debugger: Fixed memory window horizontal scrollbar not updating after some changes.
• Debugger: Fixed long pauses or broken history listings when toggling the collapse options in the History window.
• Debugger: Fixed .printf command outputting a garbled character with %
• Debugger: Improved load speed of source windows.
• Debugger: Fixed symbol-related crash when opening source windows with deferred symbol loads.
• Debugger: Fixed Step Out/Into commands not using source mode in an undocked source window.
• Debugger: Fast boot hook now marks memory as preset to avoid tripping false uninitialized memory errors when heat map trapping is enabled.
• Debugger: Source window was keeping stale source line data when reloading symbols.
• Debugger: Fixed ##BANK annotations in MADS listings not being parsed properly with decimal bank numbers.
• Debugger: Fixed bug where memory access breakpoints would stop working after clearing other access breakpoints at the same address.
• Devices: Fixed SD card multiple-block write command.
• Devices: Fixed SD card state not being reset on SD power toggle.
• Devices: Fixed bug with virtual FAT16/FAT32 hard drives returning bad sector data when re-reading final partial data sectors of a file.
• Disk: Fixed too short timeout for Record Not Found (RNF) errors.
• Disk: Improved sound of recalibrations in 810-based standard emulation modes.
• Disk: Retuned receive rates for Happy 810 and Happy 1050 standard emulation modes.
• Disk: Fixed idle motor-off timeout occurring too quickly after long commands with retries.
• Disk: XF551 full emulator now supports IN A,BUS instruction used by some modified firmware.
• Disk Explorer: Fix incorrect Unicode mappings for control characters in viewer.
• Display: Reduced frame jitter in D3D11 windowed mode on Windows 8.1+.
• Display: Fixed monochrome modes with VBXE or high artifacting.
• Display: Fixed low quality text rendering in D3D11 mode after a change in HDR mode.
• Display: Fixed crash when forced out of D3D11 exclusive full screen mode by OS due to an overlapping window.
• HDevice: Fixed append mode not working for files on H6-H9:.
• Input: Fixed vertical offset on light pen/gun position in PAL.
• Input: Add Ctrl+Shift+Alt+0 as an alias for Ctrl+Shift+0 to work around Windows stealing this key for a keyboard layout switching shortcut.
• PerfAnalyzer: Tape channels now show proper jumps when accelerated loads occur.
• PerfAnalyzer: Fixed NMI showing as IRQ when NMI preempts IRQ.
• PCLink: Directory enumerations now report if a directory is the root or a subdirectory.
• PCLink: Improved path compatibility with standard SpartaDOS X path parser.
• POKEY: Fixed glitches in low linked timer 3 audio output when updating linked timer 3+4 state.
• POKEY: Improved accuracy of serial port clock timing.
• POKEY: Serial output bit state is no longer reset by initialization mode.
• POKEY: Improved accuracy of timer reloads.
• Profiler: Fixed negative unhalted cycle counts showing up around STA WSYNC instructions.
• SaveStates: Fixed bug where sprite engine could get desynced after loading a save state.
• Tape Editor: Fixed draw tool using wrong threshold for bit polarity with waveform display enabled.
• Tape Editor: Fixed SIO capture option not showing enable state on menu.
• Tape Editor: Captured accelerated C: loads now show sync bytes.
• Tape Editor: Block checksum status is more reliably shown during live SIO data capture.
• Tape Editor: Fixed extraneous bit data being added when saving a new CAS file after editing.
• UI: Reduced glitches when toggling the debugger or full screen mode.
• UI: /startuplog can now exclude log channels with '-' and ignores Ctrl+C.
• UI: Removed delay when switching from very slow speed (1%
• UI: Progress dialogs are now suppressed in exclusive full screen mode to avoid popping out of full screen when loading tapes.
• UI: Fixed non-native file browser not working with UNC paths.
• UI: Fixed focus glitching when selecting a docked tab with an undocked pane selected.
• UI: Fixed an issue where Unicode text would sometimes be read out of the clipboard as ANSI text.

Altirra Version 4.01: [February] 2, 2022

bugs fixed

• Additions: Fixed LOADEXE.XEX using old $FD device SIO code for the program loader instead of $7D.
• AltirraOS: Fixed math pack compatibility issue with FDIV modifying FLPTR (fixes B-Graph pie chart routine).
• AltirraOS: Fixed a cursor position checking bug with split screen Gr.0 (fixes the BASIC game House of Usher).
• AltirraOS: Fixed compatibility issue with KEYDEL handling (fixes cursor movement in BrushupV40).
• ATBasic: IOCB#7 is now automatically closed on I/O errors to avoid SAVE files being kept open for write.
• Cassette: Fixed FLAC decoder crash with some block sizes.
• Cassette: Fixed regression with FSK blocks in CAS files being read as turbo pulses instead of FSK pulses.
• Disk: Retuned XF551 high-speed C/E to data frame delay.
• Display: Workaround for D3D11 minimum precision crash on Intel Iris Xe 30.0.101.1069 driver.
• Serial: Pad out 850 relocator to match length of original firmware relocator (fixes compatibility with loaders that hardcode the relocator length).
• VFS: Fixed wrong file being accessed when using atfs:// paths to access files inside a DOS 2 disk image.

To bardzo zacny port... szkoda, że człowiek nie ma na tyle czasu aby w końcu skończyć Prince of Persia.

Altirra Version 4.00: [November 13, 2021]

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. (They are still processed for character mappings due to OS limitations.)
• 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.
  

bugs fixed

• 5200: Rewrote noise implementation again to work around games with buggy joystick position filters (Galaxian) and to avoid drift for relative bindings.
• Additions: BOOT850 no longer leaves CRITIC set on failure.
• ANTIC: Fixed unstable horizontal scrolling in IR mode 3.
• ANTIC: JVB instructions now have the correct replayed height when ending a vertical scroll region.
• Audio: Changes to the default audio device are now tracked in WASAPI mode.
• Audio: Improved aliasing rejection of output audio filter.
• Cartridge: Fixed MegaCart 512K (3) banking disable behavior to only use bit 7.
• Cassette: Fixed regression with proceed/interrupt turbo modes not working.
• Cassette: Turbo decoding/filtering settings now apply to the "Analyze tape decoding" command.
• Cassette: Motor and play/record/pause state is no longer reset when switching tapes.
• Custom Devices: Fixed script compiler allowing async methods to be called from handler contexts that don't support async operations.
• Debugger: The Find Source File dialog now strips subdirectories when populating the file filter.
• Debugger: Fixed heat map not reflecting reads from some read-modify ALU instructions (e.g. ADC zp,X).
• Debugger: Improved performance of tracepoints that check return values by suppressing UI updates on the hidden breakpoint.
• Debugger: .disktrack command now works with geometries other than 18 sectors/track.
• Debugger: .diskreadsec now always uses the virtual sector length for consistency with .diskwritesec.
• Debugger: Fixed disassembler prescanner using the wrong instruction length for COP n instructions.
• Debugger: Removed JSR (abs,X) and added RTL and BRL to list of opcodes that trigger a procedure separator.
• Debugger: Fixed crash in 65C816 mode with access breakpoints with the same page address but different bank address.
• Debugger: Step Over at disassembly level now handles JSR (abs,X), JSL, and MVN/MVP opcodes.
• Debugger: Added .vbxe_pal command.
• Debugger: Fixed disassembly window repeatedly trying to scroll near the top of address space.
• Devices: Fixed a case where Rapidus could fail to cleanly switch from the 65C816 to the 6502.
• Devices: Fixed bug where debug reads from SIDE/SIDE2 flash windows could trigger side effects during sector erase operations.
• Devices: Rapidus fast RAM windows no longer have priority over ROM.
• Devices: Fixed Rapidus main RAM speed override sometimes being reverted; main RAM is now always at slow speed and extended RAM is also slow speed.
• Devices: Fixed R-Time 8 state being changed by debug reads in the debugger.
• Disk: Fixed name mangling on virtual SDFS disks for files and directories with names starting with periods.
• Disk: Fixed corrupted double-density ATRs being written in some cases from full disk drive emulators.
• Disk: Fixed bug with final write from full drive emulators not always triggering auto-flush.
• Disk: Fixed corruption of first byte sent by 810/1050 full drive emulators.
• Disk: Recalibrated ACK-to-Complete delays for the standard disk emulator for Status and Read PERCOM Block commands based on firmware timings.
• Disk: Virtual SDFS volumes now use creation timestamps for directories.
• Disk: Added workaround for 1050 Turbo firmware not detecting density if the drive is powered up with a disk already inserted.
• Disk: Fixed hang when loading ATX images with extra data pointing to out-of-range sectors.
• Disk: Fixed XF551 formatting side 2 of disks with incorrect interleave.
• Disk: Motor off timer adjusted for 1050 timing and to not count down during disk operations.
• Disk: Accurate sector timing mode now waits for the full length of long sectors in 1050-based emulation modes.
• Disk: Fixed broken audio output from Indus GT disk drives.
• Disk: Generic disk emulation profile supports XF551 acceleration again.
• Disk: Fixed several broken/missing instructions in Z80 emulation.
• Display: Fixed chroma signal having reversed phase in NTSC high artifacting mode, causing chroma artifacts in mono mode to move in the wrong direction.
• Display: D3D9 driver now allocates swap chain immediately to force a fallback with useless D3D drivers that report PS3.0 but only have 1MB of VRAM.
• Display: Fixed intensity scale color setting not affecting saturation in NTSC high artifacting mode.
• Display: Fixed issues in the high artifacting chroma filters causing some excessive banding.
• HDevice: Fixed burst writes not returning error status correctly.
• HLE: CRITIC is no longer zeroed from PBI-based SIO acceleration to fix key repeat issues with some versions of SpartaDOS X.
• IDE: Fixed Rev. S not supporting some Rev. D registers and being detected as Rev. C.
• Input: Fixed arrow keys getting stuck down in emulation when pressing Alt+arrow and then releasing Alt first, with arrow keys bound to a controller.
• Input: Quick maps are now always cycled in sorted name order.
• Input: Fixed controller triggers getting stuck down in some cases when detaching light gun controllers.
• Input: Fixed flipped horizontal relative movements for tablets.
• Input: Trigger targets are now collapsed properly so that multiple mappings to the same target cooperate, e.g. Left -> Numpad7, Up -> Numpad7, Up -> Numpad8, with both keys being pressed and released in any order.
• Input: Direct keyboard layout had incorrect mappings for Ctrl/Shift+Space.
  
• PCLink: Fixed reversed directory sort order.
• PCLink: Now uses last write timestamp for files instead of creation timestamp.
• PerfAnalyzer: Fixed painting bug with ANTIC DL event channel at some zoom levels and scroll positions.
• PerfAnalyzer: Fixed timing error for bytes sent to the computer from a full disk drive emulator, which were shown starting at their actual end times.
• POKEY: Channel mixing updated to use more representative per-channel non-linear steps.
• POKEY: Fixed channels occasionally having their timing disrupted when toggling timer IRQs.
• POKEY: Fixed extra audio pulse when timer 1/2 underflow coincides with two-tone timer reset.
• POKEY: Fixed keys not being re-reported in raw non-full scan mode when enabling debounce with keyboard scan already enabled.
• UI: Fixed mouse wheel scrolling when the system wheel scroll setting is set to pages instead of lines.
• UI: Profile editor no longer allows parenting a profile to itself or its children.
• UI: Settings load/save code now detects profile loops due to the profile editor bug and forces a reparent to the global profile so settings saving still works.
• UI: ARM64 emulation dialog no longer allows saving "OK" response.
• UI: Added 5 second timeout when notifying an existing instance in single instance mode to prevent processes piling up if the instance is hung.
• UI: Full-screen file browser scrolls back to top when changing folders.
• VBXE: Improved GTIA state syncing when toggling VBXE on the fly.
• XEP80: Scrolling now always removes one physical line, not a logical line as E: does.
• XEP80: Fixed an occasional issue with indeterminate state after cold reset.
• XEP80: Printing a char at the right margin now only inserts a line when EOL is overwritten.
• XEP80: Delete line can now slice a multi-line logical line like the real XEP80 does.
• XEP80: Fill EOL ($1C6) command was using the wrong fill byte.

Altirra Version 3.90: [July 12, 2018]

features added
AltirraOS: The boot screen in the XL/XE version now continues boot on disk insertion rather than forcing a reboot.
AltirraOS: Extended memory scan limit for 800 version to $D000 to support 52K expanded configurations.
Audio: Individual channels on the secondary POKEY can now be muted.
Cartridge: Added JRC 64K + RAM cartridge type.
Cassette: Optimized cassette tape emulation routines.
Cassette: Added option for high-pass prefiltering before the turbo tape decoder.
Debugger: Improved loop detector in history view to more precisely capture loop.
Debugger: Added @tapepos pseudovariable.
Debugger: Specifying ? for a path argument now opens a file dialog to select the path.
Debugger: The disassembly window now has support for showing procedure dividers, previewing called procedures, and jumping to call targets.
Debugger: Disassembly and History views now save their disassembly settings.
Debugger: Added option to disable automatic system symbols.
Debugger: Alt+Shift+click on the display jumps to History at the corresponding beam position.
Debugger: Verifier supports detecting access to non-canonical hardware addresses.
Debugger: .caslogdata command superceded by updated CASDATA/CASDATA2 logging channels.
Devices: XEP80 can now be switched to different controller ports.
Disk: Added full emulation for 810 Turbo, Amdek AMDC-I/II, and Percom AT-88 disk drives.
Disk: A warning is now displayed when attempting to insert a disk into a drive that doesn't support it (e.g. double-density disk into an 810).
Disk: Detailed errors are displayed when a disk image write fails on the host and is remounted virtual read/write.
Disk Explorer: Added Import File and Export File commands so that drag and drop is not needed to copy files.
Display: Added option for frame blending in linear color space for better accuracy.
Display: Color settings can be saved and loaded from external files.
Display: Added new default preset for PAL.
Display: The Hue Start slider in color settings now has the same I-Q angle definition in PAL quirks mode and works in PAL high artifacting mode.
Firmware: Add Firmware now detects OS ROM images even if the specific image is not recognized.
Firmware: Added detection for more MIO firmware images and support for auto-trimming padded 16K images down to 8K.
Input: The keyboard layout editor now warns if the key mapping being added conflicts with a keyboard shortcut.
Recorder: Added options for pixel aspect ratio and frame scaling.
Recorder: Added support for recording to WMV and H.264 through Media Foundation on Windows 7 and later.
SaveStates: Save state format rewritten to v2 (*.atstate2), now based on JSON within a .zip file for better accessibility and versioning.
SaveStates: CPU state can now be saved mid-instruction.
Simulator: Reordered frame wait and device poll timing around VBLANK to reduce input and output latency.
UI: Added experimental dark theme support.
UI: Added /reset command-line switch to selectively reset settings.
UI: Audio monitor now shows modified frequencies for two-tone mode, indicators for two-tone mode and asynchronous receive mode, and better shows ultrasonic effects.
UI: Added audio scope for viewing raw POKEY output.
UI: Added options for controlling mouse pointer visibility.
UI: Audio monitor positioning can now be customized.
Video: Added PERITEL adapter and monochrome monitor emulation.

bugs fixed
AltirraOS: Audio configuration is reset more often on tape reads to produce familiar sounds.
AltirraOS: Disk boot can now occur after cassette boot and right cartridge non-boot.
AltirraOS: OLDADR usage adjusted for compatibility with SDX QUICKED.SYS.
AltirraOS: SIO transmit operations can now be interrupted by User Break.
AltirraOS: The Display Handler now properly sets the default background color (COLOR4) to $06 when opening a GR.11 screen.
AltirraOS: KRPDEL is now set and keyboard repeat rates are NTSC/PAL adjusted on the XL/XE/XEGS version.
AltirraOS: Fixed an SIO issue with an out-of-spec short delay from asserting the command line to first command byte.
AltirraOS: Fixed disk boot issues if a PBI device or cartridge init routine issued an SIO request with DAUX2 > 0 before the disk boot.
AltirraOS: The boot screen now resets the Break key state properly after a boot is interrupted by the Break key.
AltirraOS: Improved native mode compatibility of 816 version.
ANTIC: RNMI (400/800 System Reset) is now always synchronized to VBI.
Audio: Fixed stereo mixing being twice as loud as mono mixing.
CPU: Fixed cycle timing for indexed illegal read-modify-write instructions and ARR #imm ($6B).
CPU: Fixed extra instruction being run occasionally for a DLI delayed by WSYNC.
CPU: 65C816 (dp,X) addressing mode now always wraps in emulation mode when accessing high byte regardless of DP.
CPU: 65C816 (dp) addressing mode properly wraps in emulation mode with DP aligned, except for PEI (dp).
CPU: 65C816 WDM instruction now properly fetches two bytes.
Debugger: .dumpdsm -s option now interprets 6809 instructions.
Debugger: Line number information is now updated properly when using cartridge bank mapping in MADS listings.
Debugger: Disassembly window now accepts cartridge bank addresses.
Debugger: Fixed broken option to auto-load kernel ROM symbols.
Debugger: Reduced frequency of stale memory in the disassembly window.
Debugger: Fixed incorrect call nesting in history window in Z80 mode.
Debugger: Fixed some disassembly errors in 6809 mode.
Debugger: Input byte (ib) now correctly issues read cycles with side effects in the main CPU address space.
Devices: Fixed crash on ANTIC reading from SoundBoard hardware registers.
Devices: 65C816 emulation fixes for Veronica.
Disk: Fixed some illegal indexed RMW instructions taking too few cycles for 6502 coprocessors in full disk emulators.
Disk: Full drive emulation FDC now allows Write Track commands to proceed immediately when the index signal is already active.
Disk: Improved accuracy of RIOT interval timer.
Disk: Corrected FDC head load and initial DRQ timings for Write Track command.
Disk: Implemented FDC Write Track quirk for back-to-back CRC ($F7) tokens.
Disk: Fixed some 6809 coprocessor emulation bugs.
Disk: Corrected side 2 sector mappings for ATR8000, Percom, and XF551 full drive emulators.
Disk: Fixed case where drive timing could be disrupted after hitting a drive coprocessor breakpoint.
Disk: Seek sounds no longer overlap when disk access is accelerated.
Disk: Fixed crash when ejecting disk at specific point during disk read command.
Disk: FD1771 FDC now properly times out in two revolutions instead of five in 810 full drive mode.
Disk: Fixed bogus FDC interrupts from Force Interrupt commands.
Disk: Indus GT ignores ready status to match hardware.
Disk Explorer: Fixed a filename validation bug with DOS 2 disks where duplicate files could be written if the original filename had extra characters after the extension.
Disk Explorer: Modifying a mounted disk image now forces a disk change to flush caches on emulated full drives that do track buffering.
Display: Fixed an issue with color profiles having the wrong color matching setting when initially established.
Display: Fixed crash when pasting into enhanced text display in CIO mode.
Display: Typing in enhanced text display (CIO mode) now clears the attract mode counter.
Firmware: Fall back to next available firmware if default firmware for a type is removed.
Input: Character mappings in custom keyboard layouts didn't work for non-ASCII extended characters.
Input: Changes to custom keyboard layouts didn't take effect immediately.
PerfAnalyzer: Joystick state (PIA port A) is now captured in traces.
POKEY: Improved accuracy of two-tone mode timing at 1.79MHz.
Recorder: Fixed SAP type R initial silence detector checking AUDFx registers instead of AUDCx registers.
SaveStates: POKEY serial input state is now saved.
SCSI: Fixed BSY being asserted in selection phase even for non-existent devices.
Simulator: Improved accuracy of power-up values for POKEY and GTIA registers.
Simulator: Display message via placeholder ROM if kernel ROM file could not be loaded.
VBXE: Fixed a crash when toggling shared memory option.
VBXE: Fixed double correction of display with gamma or color correction options enabled.
VFS: Fixed zip/gz paths with non-ASCII characters not being encoded properly and getting dropped on restart.