dosbox-x

• PC-98 FM synthesis fixed not to initialize itself
  again when rebooting, which fixes a problem with
  garbled FM synthesis after rebooting.
• Removed some now-unnecessary SDL Video quit/init
  calls from Windows builds.
• machine=pc98 now starts entire emulation in PC-98
  mode instead of booting up in IBM PC mode and
  switching to PC-98 mode.
• Initial "BIOS" startup screen now operates in
  PC-98 mode when machine=pc98.

0.82.3 (02/13/2018)

• Removed DOSBox SVN-style "fast" A20 gate emulation.
  Recent changes make it infeasible to keep. "fast" is
  now mapped to "mask" mode.
• RAM aliasing is now always on, even if memalias is not
  set, in order to help enforce A20 gate behavior, and
  to fix emulator crashes when a non-aliased RAM page
  is referenced through an alias.
• Cleanup and rewrite of prefetch core, to make the code
  cleaner and more readable and maintainable.
• DOS file I/O updated to apply a proper delay rather
  than the old DOSBox SVN code's cycle count dependent
  method. The delay by default will slow disk I/O down
  to mid 1990's IDE PIO speeds, which can resolve issues
  with MS-DOS demoscene or game executables that can
  malfunction when disk I/O is too fast.
• PIC code updated to enforce a proper IRQ delay on ALL
  IRQ signals, which fixes issues with MS-DOS executables
  that have race conditions between their code and their
  interrupt handlers.
• DOS Shell now shows the full intro text only at first
  run, instead of every shell invocation.
• Use FCB record size of 128 bytes if the FCB record size
  is zero (from DOSBox SVN).
• PC speaker fix not to generate a continuous tone if
  the PIT timer was set to mode 0. This fixes issues with
  many early 1990s demoscene executables leaving the PC
  speaker enabled (BEEEEEEP).
• Register DEBUGBOX.COM at DOS environment start instead
  of boot, which allows the command to work again.
• EXE loader sets stack pointer (SS:SP) into PSP segment
  (from DOSBox SVN)
• EXE loader fixed to use the larger of the minimum and
  maximum memory sizes listed in the EXE header, which
  fixes some demoscene executables with a minimum size
  larger than maximum.
• VGA DAC (palette) emulation updated to better match
  actual SVGA chipset (Paradise SVGA) behavior, which
  fixes some VGA palette errors in some demoscene
  productions.
• Added -nocachedir option to internal MOUNT command, to
  disable directory caching for a local folder mounted
  to a drive letter. When mounted this way, changes on
  the host filesystem are immediately visible in the
  guest DOS environment.
• Added -ro and -rw options to internal MOUNT command, to
  allow mounting local folders to a drive letter as a
  read-only volume.
• MIDI Fluidsynth fixed to initialize and free state properly
  so that switching to and from Fluidsynth doesn't cause
  a segfault or crash.
• MPU-401 fixed to allow changes to MIDI configuration from
  CONFIG.COM.
• DOS filename handling fixed to maintain ASCII conversion
  to uppercase, while not converting Shift-JIS double-byte
  characters in PC-98 mode. This fixes Shift-JIS filename
  corruption when the trailing byte can be mistaken for
  lowercase ASCII a to z.
• Windows fixes to keep menu bar items updated with
  DOSBox-X state.
• Remove WM_DROPFILES handling, for now. The code remains
  to allow re-enabling later.
• SDL 1.x builds fixed to process only WM_COMMAND (menu
  bar) and WM_SYSCOMMAND (system menu) events so that
  the general chatter in modern Windows system does not
  drown out the messages. This fixes issues where the
  menu bar doesn't work on some systems.
• SDL 1.x builds fixed to handle menu bar input using
  SDL's WM events instead of fighting with SDL's message
  pump to receive menu events. This fixes potential
  issues with losing menu bar events.
• dosbox.conf reference included with Windows builds
  now uses MS-DOS line endings so that the file can be
  edited in NOTEPAD.EXE
• New dosbox.conf option to control whether the menu is
  shown by default in Windows builds.
• titlebar= SDL dosbox.conf option, to allow showing a more
  user friendly name for the program instead of just using
  the EXE name.
• E_Exit() on Windows now displays the message using
  MessageBox() in addition to sending to STDERR, so that
  Windows users see the error even if they are running
  it from the desktop instead of the command line.
• PC-98 EGC bit shifter emulation fixed to correctly support
  ascending and descending bit shifting in either direction.
  This fixes screen shake emulation errors with Touhou Project
  TH04 and TH05.
• Linux/X11 fixes to SDL 1.x to better match and compare
  Visuals (descriptions of the screen) since X11 libraries
  don't seem to use the same pointer values for the same
  Visuals.
• ALT+TAB or loss of focus from fullscreen in Windows now
  restores the window instead of minimizing it.
• 3Dfx OpenGL will hide the minimize and maximize buttons
  in Windows while active.
• Windows menu bar items are now grayed out when 3Dfx OpenGL
  emulation is active (items that cannot be used at that time).
• Fix Windows system menu to always keep "show menu".
• GFX rendering fixed not to render any output while 3Dfx
  OpenGL emulation is active.
• 3Dfx OpenGL bug fixes to properly restore the DOS console
  when the 3Dfx card is de-initialized and the game returns
  to the DOS prompt.
• Linux/X11 window output fixed to keep the window on the
  screen even when switching between OpenGL and non-OpenGL,
  and when setting the SDL video mode.
• Remove some init hacks and SDL forced reinitialized hacks,
  so that the window is stable on the screen.
• Added code to do more OpenGL state initialization (both
  output=opengl and when initializing 3Dfx OpenGL emulation)
  to make more consistent output.
• 3Dfx voodoo OpenGL based emulation fixed to switch out of
  fullscreen mode IF DOSBox-X was fullscreen at the time the
  card is initialized.
• 3Dfx voodoo OpenGL based emulation no longer allows fullscreen
  mode, and does everything it can to prevent window resizing.
• Linux/X11 disable XRandR, XV, and X modeset functions. Do not
  change monitor resolution.
• MPU-401 MIDI emulation fixed to look at all conductor message
  bytes for code 0xFC (ALL END) instead of just the first byte.
  This fixes hangs in games that send additional bytes prior to
  0xFC and then expect the MPU-401 to signal 0xFC back when the
  games are waiting for music to stop.
• Fix DOS CON driver not to signal data ready for PC-98 scan
  codes that have no corresponding ANSI code. Tapping numeric
  keypad keys during the title screen in Touhou Project should
  no longer cause the game to pause waiting for keyboard input
  when going into demo mode.
• Fix DOS CON driver to signal data ready for buffered escape
  code.
• Fix PC-98 keyboard emulation not to apply IBM PC "extended"
  keyboard scancode filtering.
• Window maximization does not count as a user resize preference.
• Fix Windows builds to enable DirectSerial, Direct LPT, modem,
  emulation.
• New mapper shortcut to restore the window's original size.
• Fix bug with SHL instruction and OF flag, which corrects some
  games and their decompression routines.
• Fullscreen (monitor) modesetting removed. DOSBox-X either runs
  in a window, or scales up to fill the monitor, but will not change
  the monitor resolution.
• Resize handling fixed to differentiate user resize verses resize
  caused by DOSBox-X changing the window dimensions.
• Linux/X11 fixes to avoid flickering when resizing the window, and
  to avoid redrawing unless necessary.
• Window resize management, to scale/arrange the output to fit the
  window (for output= surface, opengl, direct3d)
• Enable resizing again, except when the GUI or mapper is active.
• Fix Linux/X11 to always take resize events, instead of ignoring
  all further resize events just because one resize event is forever
  "pending"
• Linux/X11 builds now track the size of the window on the desktop,
  to keep track of resizing and maximizing.

0.82.3 (02/13/2018)

• Removed DOSBox SVN-style "fast" A20 gate emulation.
  Recent changes make it infeasible to keep. "fast" is
  now mapped to "mask" mode.
• RAM aliasing is now always on, even if memalias is not
  set, in order to help enforce A20 gate behavior, and
  to fix emulator crashes when a non-aliased RAM page
  is referenced through an alias.
• Cleanup and rewrite of prefetch core, to make the code
  cleaner and more readable and maintainable.
• DOS file I/O updated to apply a proper delay rather
  than the old DOSBox SVN code's cycle count dependent
  method. The delay by default will slow disk I/O down
  to mid 1990's IDE PIO speeds, which can resolve issues
  with MS-DOS demoscene or game executables that can
  malfunction when disk I/O is too fast.
• PIC code updated to enforce a proper IRQ delay on ALL
  IRQ signals, which fixes issues with MS-DOS executables
  that have race conditions between their code and their
  interrupt handlers.
• DOS Shell now shows the full intro text only at first
  run, instead of every shell invocation.
• Use FCB record size of 128 bytes if the FCB record size
  is zero (from DOSBox SVN).
• PC speaker fix not to generate a continuous tone if
  the PIT timer was set to mode 0. This fixes issues with
  many early 1990s demoscene executables leaving the PC
  speaker enabled (BEEEEEEP).
• Register DEBUGBOX.COM at DOS environment start instead
  of boot, which allows the command to work again.
• EXE loader sets stack pointer (SS:SP) into PSP segment
  (from DOSBox SVN)
• EXE loader fixed to use the larger of the minimum and
  maximum memory sizes listed in the EXE header, which
  fixes some demoscene executables with a minimum size
  larger than maximum.
• VGA DAC (palette) emulation updated to better match
  actual SVGA chipset (Paradise SVGA) behavior, which
  fixes some VGA palette errors in some demoscene
  productions.
• Added -nocachedir option to internal MOUNT command, to
  disable directory caching for a local folder mounted
  to a drive letter. When mounted this way, changes on
  the host filesystem are immediately visible in the
  guest DOS environment.
• Added -ro and -rw options to internal MOUNT command, to
  allow mounting local folders to a drive letter as a
  read-only volume.
• MIDI Fluidsynth fixed to initialize and free state properly
  so that switching to and from Fluidsynth doesn't cause
  a segfault or crash.
• MPU-401 fixed to allow changes to MIDI configuration from
  CONFIG.COM.
• DOS filename handling fixed to maintain ASCII conversion
  to uppercase, while not converting Shift-JIS double-byte
  characters in PC-98 mode. This fixes Shift-JIS filename
  corruption when the trailing byte can be mistaken for
  lowercase ASCII a to z.
• Windows fixes to keep menu bar items updated with
  DOSBox-X state.
• Remove WM_DROPFILES handling, for now. The code remains
  to allow re-enabling later.
• SDL 1.x builds fixed to process only WM_COMMAND (menu
  bar) and WM_SYSCOMMAND (system menu) events so that
  the general chatter in modern Windows system does not
  drown out the messages. This fixes issues where the
  menu bar doesn't work on some systems.
• SDL 1.x builds fixed to handle menu bar input using
  SDL's WM events instead of fighting with SDL's message
  pump to receive menu events. This fixes potential
  issues with losing menu bar events.
• dosbox.conf reference included with Windows builds
  now uses MS-DOS line endings so that the file can be
  edited in NOTEPAD.EXE
• New dosbox.conf option to control whether the menu is
  shown by default in Windows builds.
• titlebar= SDL dosbox.conf option, to allow showing a more
  user friendly name for the program instead of just using
  the EXE name.
• E_Exit() on Windows now displays the message using
  MessageBox() in addition to sending to STDERR, so that
  Windows users see the error even if they are running
  it from the desktop instead of the command line.
• PC-98 EGC bit shifter emulation fixed to correctly support
  ascending and descending bit shifting in either direction.
  This fixes screen shake emulation errors with Touhou Project
  TH04 and TH05.
• Linux/X11 fixes to SDL 1.x to better match and compare
  Visuals (descriptions of the screen) since X11 libraries
  don't seem to use the same pointer values for the same
  Visuals.
• ALT+TAB or loss of focus from fullscreen in Windows now
  restores the window instead of minimizing it.
• 3Dfx OpenGL will hide the minimize and maximize buttons
  in Windows while active.
• Windows menu bar items are now grayed out when 3Dfx OpenGL
  emulation is active (items that cannot be used at that time).
• Fix Windows system menu to always keep "show menu".
• GFX rendering fixed not to render any output while 3Dfx
  OpenGL emulation is active.
• 3Dfx OpenGL bug fixes to properly restore the DOS console
  when the 3Dfx card is de-initialized and the game returns
  to the DOS prompt.
• Linux/X11 window output fixed to keep the window on the
  screen even when switching between OpenGL and non-OpenGL,
  and when setting the SDL video mode.
• Remove some init hacks and SDL forced reinitialized hacks,
  so that the window is stable on the screen.
• Added code to do more OpenGL state initialization (both
  output=opengl and when initializing 3Dfx OpenGL emulation)
  to make more consistent output.
• 3Dfx voodoo OpenGL based emulation fixed to switch out of
  fullscreen mode IF DOSBox-X was fullscreen at the time the
  card is initialized.
• 3Dfx voodoo OpenGL based emulation no longer allows fullscreen
  mode, and does everything it can to prevent window resizing.
• Linux/X11 disable XRandR, XV, and X modeset functions. Do not
  change monitor resolution.
• MPU-401 MIDI emulation fixed to look at all conductor message
  bytes for code 0xFC (ALL END) instead of just the first byte.
  This fixes hangs in games that send additional bytes prior to
  0xFC and then expect the MPU-401 to signal 0xFC back when the
  games are waiting for music to stop.
• Fix DOS CON driver not to signal data ready for PC-98 scan
  codes that have no corresponding ANSI code. Tapping numeric
  keypad keys during the title screen in Touhou Project should
  no longer cause the game to pause waiting for keyboard input
  when going into demo mode.
• Fix DOS CON driver to signal data ready for buffered escape
  code.
• Fix PC-98 keyboard emulation not to apply IBM PC "extended"
  keyboard scancode filtering.
• Window maximization does not count as a user resize preference.
• Fix Windows builds to enable DirectSerial, Direct LPT, modem,
  emulation.
• New mapper shortcut to restore the window's original size.
• Fix bug with SHL instruction and OF flag, which corrects some
  games and their decompression routines.
• Fullscreen (monitor) modesetting removed. DOSBox-X either runs
  in a window, or scales up to fill the monitor, but will not change
  the monitor resolution.
• Resize handling fixed to differentiate user resize verses resize
  caused by DOSBox-X changing the window dimensions.
• Linux/X11 fixes to avoid flickering when resizing the window, and
  to avoid redrawing unless necessary.
• Window resize management, to scale/arrange the output to fit the
  window (for output= surface, opengl, direct3d)
• Enable resizing again, except when the GUI or mapper is active.
• Fix Linux/X11 to always take resize events, instead of ignoring
  all further resize events just because one resize event is forever
  "pending"
• Linux/X11 builds now track the size of the window on the desktop,
  to keep track of resizing and maximizing.

• DOS filename handling fixed to retain uppercase conversion while not corrupting Shift-JIS double-byte characters
• MIDI settings can now be changed at runtime using CONFIG.COM
• Fluidsynth bugfix to correct segfault when switching to and from Fluidsynth MIDI output more than once
• Added -ro option to MOUNT.COM to allow mounting local folders read-only.
• Added -nocachedir option to MOUNT.COM to disable caching local file information when mounting a local folder.

• DOS filename handling fixed to retain uppercase conversion while not corrupting Shift-JIS double-byte characters
• MIDI settings can now be changed at runtime using CONFIG.COM
• Fluidsynth bugfix to correct segfault when switching to and from Fluidsynth MIDI output more than once
• Added -ro option to MOUNT.COM to allow mounting local folders read-only.
• Added -nocachedir option to MOUNT.COM to disable caching local file information when mounting a local folder.

• New code to force 3Dfx OpenGL initial state to use GL_SMOOTH shading
• Linux/X11 bug fixes, including detection of Visual format change and code to keep the window on the screen even during SDL video mode changes
• PC-98: EGC bit shifter fixes and corrections. Screen shake in Touhou Project is emulated correctly now without errors
• PC-98: It turns out that the "page flipping" bit in PC-98 hardware is NOT double buffered and changes take effect immediately, therefore tearlines caused by page flipping mid-frame are normal. However, a hack to delay page flipping to vertical retrace to possibly alleviate tearlines is available.
• Fixed 3Dfx OpenGL code to prevent resizing at all costs including removal of the minimize button in the Windows title bar area
• Added code to disable (gray out) menu bar items that are not available while 3Dfx OpenGL emulation is running.
• Windows: Fatal errors (E_Exit) now display a message box in addition to sending to stderr, so that users who run the game without the command prompt can know what went wrong instead of DOSBox-X just disappearing suddenly from the desktop.
• New titlebar= dosbox.conf option to replace the running program name with a user defined string, if desired. (emendelson)
• New dosbox.conf option to control whether the Windows menu bar is initially visible.
• Fixed Windows builds to use SDL's system WM events instead of fighting the SDL message pump over menu (WM_COMMAND) events.
• dosbox.reference.conf now uses MS-DOS (CR LF) line endings so that it can be edited on Windows systems using NOTEPAD.EXE

• New code to force 3Dfx OpenGL initial state to use GL_SMOOTH shading
• Linux/X11 bug fixes, including detection of Visual format change and code to keep the window on the screen even during SDL video mode changes
• PC-98: EGC bit shifter fixes and corrections. Screen shake in Touhou Project is emulated correctly now without errors
• PC-98: It turns out that the "page flipping" bit in PC-98 hardware is NOT double buffered and changes take effect immediately, therefore tearlines caused by page flipping mid-frame are normal. However, a hack to delay page flipping to vertical retrace to possibly alleviate tearlines is available.
• Fixed 3Dfx OpenGL code to prevent resizing at all costs including removal of the minimize button in the Windows title bar area
• Added code to disable (gray out) menu bar items that are not available while 3Dfx OpenGL emulation is running.
• Windows: Fatal errors (E_Exit) now display a message box in addition to sending to stderr, so that users who run the game without the command prompt can know what went wrong instead of DOSBox-X just disappearing suddenly from the desktop.
• New titlebar= dosbox.conf option to replace the running program name with a user defined string, if desired. (emendelson)
• New dosbox.conf option to control whether the Windows menu bar is initially visible.
• Fixed Windows builds to use SDL's system WM events instead of fighting the SDL message pump over menu (WM_COMMAND) events.
• dosbox.reference.conf now uses MS-DOS (CR LF) line endings so that it can be edited on Windows systems using NOTEPAD.EXE

• 3Dfx OpenGL state cleanup
• output=opengl state cleanup
• Eliminated OpenGL output kludge that resets state by forcing SDL to shutdown and reinitialize video driver
• Other cleanup
• Losing focus in fullscreen mode now restores the window instead of minimizing it

• 3Dfx OpenGL state cleanup
• output=opengl state cleanup
• Eliminated OpenGL output kludge that resets state by forcing SDL to shutdown and reinitialize video driver
• Other cleanup
• Losing focus in fullscreen mode now restores the window instead of minimizing it

EDIT: The older release was replaced with this version to add restore on loss of focus

• ALT+TAB fixes, focus additions.
• 3Dfx emulation fixed never to run fullscreen. It will leave fullscreen if necessary.
• Added code to enforce no resizing or scaling of the 3Dfx overlay

• Windows reliability bug fixes
• Voodoo 3Dfx OpenGL-backed emulation no longer permits fullscreen mode. It will exit fullscreen mode if possible.
• Additional fixes to 3Dfx OpenGL emulation to fix the GL viewport on setup, disable resizing, and display the screen properly.

• Fix PC-98 MS-DOS CON device emulation not to signal data available with extended scancodes unless actual data is available.
• Fix PC-98 keyboard handling not to use IBM PC style extended scancode handling in PC-98 mode.

• SDL 1.x modifications to make surface asynchronous from window
• Resizing/moving and using menus no longer causes emulator to pause
• Fullscreen ALT+TAB bug fixes. Exiting fullscreen mode is possible now by ALT+TAB just as it was before this hack.
• DOSBox-X re-initialization fixes. Starting up with output=opengl no longer causes window to appear, disappear, and then reappear (often under another desktop window)
• Merged in changes from 'develop' branch including PC-98 MS-DOS bugfix for DOS CON device input status
• Async window management verified to work correctly under Windows 10, Windows 7, and Windows XP (still can't mount anything under Windows XP in my builds)

• SDL 1.x hacked to separate SDL surface from parent window
• Parent window is in separate thread
• SDL surface is in main thread, and child window of parent window
• Parent window forwards move/resize events and menu input to child window
• Since the parent window thread handles resize events, the parent window thread is the one blocked by Windows during move/resize while the emulator is free to keep running and respond to the resize events. Resizing the window, moving the window, or using the menu bar no longer pauses the emulator.
• Fullscreen support still works, as far as I can tell
• Surface, OpenGL, and Direct3D outputs updated to work with the new asynchronous resize events
• The method of conversion to the code was done in a way that is least disruptive to the SDL library source code.

If this branch proves to be stable and functional, it will eventually be merged into the develop branch, and from there into master.

This code currently exists in the develop-win-sdl1-async-hack-201802 branch.

So far I have tested it with Windows 10. I need feedback on:

• Compatibility with Windows 7 and 8
• Compatibility with Windows XP
• Possible resize/move issues with the emulator display

UPDATE: Seems to work fine with Windows 7. Any issues with Windows XP?

UPDATE: I just patched the binary to run under Windows XP. It still can't access files, but the asynchronous window code seems to work fine. Also whatever I did seems to have fixed crashes that occur when you try to use Direct3D in VirtualBox.

UPDATE: I just fixed some bugs since this release regarding ALT+TAB and fullscreen mode. The fixes will appear in the next async hack binary release.

Have fun.

• The emulator window is fully resizeable now (Windows and Linux)
• Removed Direct3D modesetting. Fullscreen mode is fullscreen, without changing the video mode.
• Initial beta compile with direct serial, direct lpt, and modem emulation enabled

0.82.2 (01/29/2018)

• Linux builds no longer enable window resizing. The ability to
  resize will be added back when the emulator can better handle
  the user resizing the window.
• Windows and Linux now have synchronized build date and version
  strings.
• Codebase begin transition to C++11
• The Windows maximize button no longer triggers fullscreen mode.
• Direct3D, OpenGL, and Surface outputs updated to fill the window
  in Windows builds when the window is maximized. If aspect
  correction is enabled, the Direct3D and OpenGL outputs will
  scale the DOS screen (with pillarbox/letterbox padding) to the
  correct aspect ratio and center within the maximized window.
• Fixed minor memory leak in MT32 (MUNT) synthesizer usage.
• Fixed uninitialized state issues with DMA channel 4 (cascade).
• IMGMOUNT now allows mounting the El Torito bootable floppy image
  of a CD-ROM drive as a drive letter and accessible (read only)
  filesystem. The FAT filesystem driver was fixed to support working
  from sources other than a direct file.
• PC-98 mode fixed not to register certain built-in commands and
  binaries to drive Z:\ that are not compatible with PC-98 mode.
  MEM.EXE in particular uses IBM PC-specific techniques to gather
  it's information, and is therefore incompatible with PC-98 mode.
  This can be verified from the source code as MEM.EXE was evidently
  borrowed from the FreeDOS project.
• EGA emulation (machine=ega) fixed to render 8bpp (256-color mode)
  instead of full 32bpp VGA output. EGA video output is limited to
  64-color (6-bit) by the design of the video connector (2-bit R/G/B)
  therefore the full precision of 32bpp is not needed. This will also
  benefit video capture as the reduced color bit depth will result
  in smaller AVI files when recording gameplay.
• Added code to correctly detect 15-bit highcolor vs 16-bit highcolor
  display format support, despite SDL falsely indicating 16-bit
  color in both cases, which fixes incorrect colors on 15-bit display
  modes.
• Fix up VGA DAC/palette mapping to display the emulator screen
  properly on 16-bit true color displays. Fixed off-by-one shift
  mistake in the DOSBox-X render scaler code that caused
  green and purple tints to colors on 16-bit true color displays.
• Add "Show menu bar" command to the Windows "system menu" so that
  the menu bar can be brought back after selecting "hide menu bar".
• Losing window focus while fullscreen no longer leaves the emulator
  window blank.
• Maximize/restore fullscreen cleanup.
• Removed DDRAW output.
• Fix FAT filesystem driver to clear "success" flag at all failure
  return points. This fixes problems where unrecognizeable FAT
  filesystems are nonetheless presented as a drive letter with
  garbled filenames, when IMGMOUNT should have displayed an error
  instead.
• Fix FAT filesystem driver to allow PC-98 HDI images to load that
  have headcount == 0 in the BPB.
• Fix Adlib emulation not to register a mapper handler if emulation
  will jump to PC-98 mode, and fix mapper handler to check if Adlib
  emulation is loaded to avoid segfault.
• Add "recording" volume to control the loudness of the audio going
  out to capture (WAV, AVI, etc.)
• Separate mixer rendering from master volume. Apply master volume
  at the sound card only, leave audio at full volume for recording
  (WAV, AVI, etc. capture).
• dosbox.conf and command line option to log CON driver output to
  a file. Anything written to STDOUT/CON by a DOS application is
  logged this way.
• --time-limit command line option to put a time limit on the
  emulator, in seconds.
• Keyboard shortcut for the mapper UI no longer leaves keys "stuck"
  in the guest to cause problems when you exit the mapper UI.
• Fixed code mistake that caused OpenGL NB output when dosbox.conf
  specified output=opengl
• Mapper layout fixes:
  • Shortcut buttons (on the right hand side of the UI) fixed to
    become two columns wide if the button text won't fit in one
    column.
  • Some shortcut button titles shortened.
• Mapper UI updated to show which bindings are being activated by
  hilighting buttons in the UI.
• Mapper UI modifier buttons indicate status through hilighting.
• Mapper UI joystick buttons and axes now use hilighting to indicate
  that there is input from the device.
• Mapper fix for 4-axis joysticks that may count zero buttons, and
  then crash (divide by zero) when the user pushes a button on the
  joystick device.
• BIOS emulation now allows you to specify binary blobs to execute
  in the guest system as part of startup. One can be specified to
  execute just after CPU reset/power-on, and the other just before
  booting to the DOS shell. THE BINARY BLOBS EXECUTE IN THE GUEST
  ENVIRONMENT AND NOT AS ARBITRARY CODE ON YOUR HOST. This option
  is provided for both automated testing and for the curious who
  may want to venture into low level ASM hacking.
• INTRO.COM fixed to accept keyboard input correctly in both
  PC-98 and IBM PC mode. You can now browse the help text properly
  in either mode.
• DOS shell fixed to accept DOSKEY-like input in both IBM PC and
  PC-98 mode (including arrow keys, F3, tab completion, etc.)
• DOS CON emulation now provides function keys (F1-F10) in PC-98 mode.
• DOS CON emulation fixed to process PC-98 BIOS codes and generate
  PC-98 ANSI escapes as real hardware normally does.
• Mapper no longer shows two sets of the shortcuts (one overlaid
  over the keyboard), registration bug fixed.
• PC-98 keyboard interrupt handler now handles CTRL key and
  passes most keys as-is down through INT 18h now.
• Removed non-recursive page fault option. It is now always on,
  except for internal cases where it needs to be off for callback
  instructions to do their work properly.
• Removed dynamic x86 core. It is old and unmaintained code that
  is incompatible with the non-recursive page fault system.
• IRQ cascade interrupt fixes and cleanup.
• BAT files given on the command line fixed to occur AFTER the
  registration of ULTRASND and BLASTER environment variables.
• PC-98: DOS CON emulation fixed to decode Shift-JIS itself,
  with consideration that some proprietary double-byte encodings
  yield single-wide characters. DOS program using NEC's proprietary
  box/line drawing characters this way should display properly now.
• DOSBox shell "greeting" now displays a proper box in PC-98 mode
  instead of framing the text in rows and columns of Katakana. (basic2004)

• The Windows maximize button no longer triggers fullscreen mode.
• Direct3D, OpenGL, and Surface outputs updated to fill the window
  in Windows builds when the window is maximized. If aspect
  correction is enabled, the Direct3D and OpenGL outputs will
  scale the DOS screen (with pillarbox/letterbox padding) to the
  correct aspect ratio and center within the maximized window.
• Fixed minor memory leak in MT32 (MUNT) synthesizer usage.
• Fixed uninitialized state issues with DMA channel 4 (cascade).
• IMGMOUNT now allows mounting the El Torito bootable floppy image
  of a CD-ROM drive as a drive letter and accessible (read only)
  filesystem. The FAT filesystem driver was fixed to support working
  from sources other than a direct file.
• PC-98 mode fixed not to register certain built-in commands and
  binaries to drive Z:\ that are not compatible with PC-98 mode.
  MEM.EXE in particular uses IBM PC-specific techniques to gather
  it's information, and is therefore incompatible with PC-98 mode.
  This can be verified from the source code as MEM.EXE was evidently
  borrowed from the FreeDOS project.

• Added code to correctly detect 15-bit highcolor vs 16-bit highcolor
  display format support, despite SDL falsely indicating 16-bit
  color in both cases, which fixes incorrect colors on 15-bit display
  modes.
• Fix up VGA DAC/palette mapping to display the emulator screen
  properly on 16-bit true color displays. Fixed off-by-one shift
  mistake in the DOSBox-X render scaler code that caused
  green and purple tints to colors on 16-bit true color displays.

• Fix up VGA DAC/palette mapping to display the emulator screen
  properly on 16-bit true color displays. Fixed off-by-one shift
  mistake in the DOSBox-X render scaler code that caused
  green and purple tints to colors on 16-bit true color displays.
• Add "Show menu bar" command to the Windows "system menu" so that
  the menu bar can be brought back after selecting "hide menu bar".
• Losing window focus while fullscreen no longer leaves the emulator
  window blank.
• Maximize/restore fullscreen cleanup.
• Removed DDRAW output.

• Add "Show menu bar" command to the Windows "system menu" so that
  the menu bar can be brought back after selecting "hide menu bar".
• Losing window focus while fullscreen no longer leaves the emulator
  window blank.
• Maximize/restore fullscreen cleanup.
• Removed DDRAW output.
• Fix FAT filesystem driver to clear "success" flag at all failure
  return points. This fixes problems where unrecognizeable FAT
  filesystems are nonetheless presented as a drive letter with
  garbled filenames, when IMGMOUNT should have displayed an error
  instead.
• Fix FAT filesystem driver to allow PC-98 HDI images to load that
  have headcount == 0 in the BPB.
• Fix Adlib emulation not to register a mapper handler if emulation
  will jump to PC-98 mode, and fix mapper handler to check if Adlib
  emulation is loaded to avoid segfault.
• Add "recording" volume to control the loudness of the audio going
  out to capture (WAV, AVI, etc.)
• Separate mixer rendering from master volume. Apply master volume
  at the sound card only, leave audio at full volume for recording
  (WAV, AVI, etc. capture).
• dosbox.conf and command line option to log CON driver output to
  a file. Anything written to STDOUT/CON by a DOS application is
  logged this way.
• --time-limit command line option to put a time limit on the
  emulator, in seconds.
• Keyboard shortcut for the mapper UI no longer leaves keys "stuck"
  in the guest to cause problems when you exit the mapper UI.
• Fixed code mistake that caused OpenGL NB output when dosbox.conf
  specified output=opengl
• Mapper layout fixes:
  • Shortcut buttons (on the right hand side of the UI) fixed to
    become two columns wide if the button text won't fit in one
    column.
  • Some shortcut button titles shortened.
• Mapper UI updated to show which bindings are being activated by
  hilighting buttons in the UI.
• Mapper UI modifier buttons indicate status through hilighting.
• Mapper UI joystick buttons and axes now use hilighting to indicate
  that there is input from the device.
• Mapper fix for 4-axis joysticks that may count zero buttons, and
  then crash (divide by zero) when the user pushes a button on the
  joystick device.