DOSBox-X 2024.10.01 2024-10-01 23:19

2024.10.01

• Allow the ".inst" extension for CUE sheets. (Allofich)
• Add SET /FIRST, a DOSBox-X extension, that takes the specified
  variable if it exists and moves it to the front of the environment
  block. (joncampbell123).
• SET command processing has been cleaned up and streamlined.
  Added /ERASE command line switch to clear the environment
  block (DOSBox-X extension). (joncampbell123).
• VESA BIOS: Add new option to adjust reported linear framebuffer
  address by a specific number of pixels. This is needed by
  "Out of Control" by Contract which for whatever reason,
  will always draw to the LFB base minus 128 bytes. This option
  makes it possible to correct the demo graphics. (joncampbell123).
• Gravis Ultrasound: Officially, registers 0x0-0xF, the voice
  control registers, are documented to have a 0x0-0xF write and
  0x80-0x8F read alias. Unofficially, according to the behavior
  of 1997 demo "Out of Control" by Contract, all GUS registers
  have a N and (N+0x80) alias, or at least register 0x4C, and
  you can read them back from either index. Or else the demo
  fails to detect the GUS. So add this alias, but only if
  enabled in dosbox.conf. Real hardware testing is required to
  know if the actual GUS behaves this way and which versions.
  (joncampbell123).
• Move the INT 3 default vector to well within the initial 16
  bytes of the DOS kernel, away from the List of Lists and SFT.
  The previous placement caused certain versions of Windows 3.2
  (yes, the Chinese version) to crash on startup. (joncampbell123).
• When using the running program to name screenshots and such,
  filter out all invalid characters so that Windows users can
  take snapshots even if junk characters are there (joncampbell123).
• DOS FAT driver: If INT 13h reports disk change, adapt floppy
  disk geometry to new disk image according to media byte. This
  allows DS_BLISS to present it's 720K fake floppy even if the
  user initially mounted a 1.44MB floppy to drive A: (joncampbell123).
• INT 10 mode list: Add "pitch" parameter. If nonzero, the value
  (in pixels) is how to program the pixels per scanline when
  setting the mode.
• VESAMOED: Add -pitch option to control the pitch (pixels per
  scanline). The intent is to work around DOS games that assume
  nonstandard pixels per scanline by allowing the VESA BIOS mode
  to use a different one. For example, Line Wars II has an S3
  acceleration mode that uses 800x600, but for whatever reason,
  assumes the video mode is 1024 pixels per scanline, and will
  render garbled graphics if that is not the case. (joncampbell123).
• S3 emulation: Follow S3 Trio64 documentation and mask the Linear
  Window Position bits according to the size of the memory. You
  can only place it on a multiple of the memory size. This silences
  warnings caused by Line Wars II which appears to modify only the
  upper byte but not the lower when modifying this register, which
  then leaves 0xA0 in the lower half. That lower half would be
  ignored for 1MB or larger video memory sizes. (joncampbell123).
• S3 XGA emulation: Add XGA acceleration for 4bpp packed 16-color
  SVGA modes. A CAD package has S3 support drivers that use the
  16-color 4bpp packed modes and expects XGA acceleration to work.
  (joncampbell123).
• Add "-o int13" option to IMGMOUNT to direct the FAT driver to do
  all disk I/O through INT 13h instead of directly. This is intended
  for certain demoscene productions that apparently like to make
  files appear out of thin air by intercepting INT 13h floppy disk
  I/O and then asking MS-DOS to run something from it. Hack for
  "DS_BLISS" demo. (joncampbell123).
• Fixed crash when a language file is loaded on a Windows host with
  US keyboard (maron2000)
• Added Added sharp-bilinear Direct3D shader (RibShark)
• Pass output dimensions to Direct3D shaders (RibShark)
• Fixed BPB of floppy images made by IMGMAKE command (maron2000)
• Fixed timestamp of volume label changed by LABEL command (maron2000)
• Fixed pathname issues when mounting differencial VHD images (maxpat78)
• Corrected relative/absolute track offset in subchannel data for
  CD-ROM images (RibShark).
• Fixed particular dead keys were not working to input characters
  with diacritics (maron2000).
• Enabled "Edit and Continue" option for debug builds of Visual Studio
  Intel builds (aybe).
• Updated libchdr to latest (treloret).
• Fixed icon in Gnome dock bar (FredBezies).
• add option "[dos] automount drive directories" for Windows builds,
  this will mount existing drive directories from C to Y drive (aybe).
• fix off-center and off-screen window after entering the
  configuration tool while using TTF output mode (aybe).
• add menu item for centering window "Video/Center window" (aybe).
• Fixed update-version-number script to patch all *.iss files, not
  just the specific one it did before, to ensure future releases have
  correct version numbers. (joncampbell123).
• Updated Nuked-OPL3 code to nukeykt/Nuked-OPL3@cfedb09 (StevenSYS)
• Updated SDL2 library to 2.30.4 (maron2000)
• Fixed TTF mode didn't change to graphic mode when machine = Hercules
  (maron2000)
• Configuration tool: (aybe)
  • more Windows 3.1 look'n'feel (themes w/ host dark mode detection)
  • enhance main window layout, it is now visible in its entirety
  • fix layout issues, off by one in rectangle drawing functions
  • fix 'list iterators incompatible' when pressing the Tab key
  • properties/help: sorted alphabetically, mouse wheel scrollable
  • remove few rendundant labels, adjust names of some others
  • retain 'show advanced options' state throughout session
• SVN r4483: Fix compilation in Visual Studio 2008 (Allofich)
• DOSBox Staging: Decouple CMS and OPL emulations (Allofich)

DOSBox-X 2024.07.01 2024-07-01 21:45

2024.07.01

• Correct Hercules InColor memory emulation. Read and write planar
  behavior was incorrect due to a misunderstanding of available
  documentation. (joncampbell123).
• Hercules/MDA and InColor integration broke the Hercules blend mode
  render, fix the render so that adjacent lit pixels are brighter
  again. (joncampbell123).
• Fix "VRD" debugger command bug that didn't properly render out the
  rest of the VGA display frame. (joncampbell123).
• Fixed debugger mapper shortcut bug where entering the debugger
  completes the 1 ms "tick" early, effectively jumping emulator time
  up to start of the next ms. This might explain the mysterious cases
  where a program always fails to work unless you are debugging it.
  (joncampbell123).
• Added debugger command "VRT" which resumes running the guest until
  vertical retrace. Added for programmers who wish to write something
  to screen and then see it show up. (joncampbell123).
• Fix IMGMOUNT, when mounting FAT disk images, to provide the DPB the
  actual media id byte instead of assuming 0xF8 or 0xF0. INT AH=1Ch
  should now report the proper media id byte for any floppy format,
  instead of always reporting 0xF0 (1.44MB floppy). (joncampbell123).
• Allow BOOT to load and execute the boot sector of a guest OS even if
  memory size is too small (in IBM PC emulation, less than 32KB of RAM).
  MS-DOS 1.x of course will crash if you try that because of the
  assumptions made in the boot sector, but it's there if you are feeling
  adventurous or are in an experimental mood (joncampbell123).
• If memsize is 4KB, place the COMMAND.COM PSP segment in the private
  UMB area instead of the normal MCB allocation chain (joncampbell123).
• DOS kernel will always allocate kernel memory from private UMB area
  if memory size < 16KB, in order to continue to work (joncampbell123).
• DOS kernel will allocate from segment 0x60 instead of 0x70 if the
  memory size is less than 64KB. (joncampbell123).
• files= and fcbs= default value now automatically scales according to
  available conventional memory (640KB or lower) in order for memsize 64KB
  or lower to free up or memory and run properly. (joncampbell123).
• dosbox.conf files= and fcbs= settings have been changed to allow
  "0" as a value to mean choose a reasonable default. (joncampbell123).
• Fix bug where DOS kernel crashes on startup because of the initial
  stack pointer set by BIOS startup that points past available memory
  when memsize is 64KB or less. (joncampbell123).
• If minimum mcb free is not set and memory size is less than 256KB,
  automatically set minimum mcb free to minimum mcb segment, in order
  to release more available memory within the limited space (joncampbell123).
• Do not enable XMS emulation if system memory size is 1MB or less. (joncampbell123)
• DOS drive cache: When listing a directory, defer the filename sort until
  the entire list is built. This improves directory listing performance
  in directories with many files. (joncampbell123).
• INT 10h, if instructed, will now use the video parameter table to set
  standard VGA modes instead of internal logic. (joncampbell123).
• Removed erroneous VGA display compensation code for certain EGA/VGA
  registers that really only caused incorrect display of the EGA 640x350
  4-color mode. (joncampbell123).
• Corrected EGA and VGA video parameter tables by copying the parameters
  from actual IBM EGA VGA ROM BIOS images. They should be 100% correct
  now. (joncampbell123).
• Corrected register values and video rendering of machine=EGA 640x350
  mode when emulating 64KB of RAM. This should fix rendering and display
  issues with EGA 640x350 4-color emulation. Also corrected INT 10h
  character printing functions to filter the color attribute value for
  640x350 4-color mode so the DOS prompt does not have alternating
  colors, in the same manner the real IBM EGA BIOS does. (joncampbell123).
• Fix BIOS screen to use CGA 640x200 2-color mode if machine=ega with
  less than 128KB of video ram, or machine=ega200, instead of showing
  a garbled 640x350 display. (joncampbell123).
• Fix memory buffer overrun with machine=ega that can occur with
  640x350 mode and less than 256KB of video RAM. (joncampbell123).
• The DOSBox clipboard API (via INT 2Fh) is now disabled by default, because
  some programs use it's presence to detect whether they are running under
  Windows. This fixes a program where Norton Desktop 1.0 does not use it's
  "graphical" text UI elements because it thinks it's running within a
  Windows DOS box. (joncampbell123).
• Remove unnecessary and useless Win32 fcntl() on some memory typecast
  to int which is causing a segfault whenever a ZIP file is mounted
  as a drive with an overlay filesystem atop it. (joncampbell123)
• Update caption control feature to use equivalent APIs on Mac OS. (joncampbell123)
• Add dosbox.conf and menu option to control whether the DOSBox-X window
  can be seen in screen captures in Windows 7/8/10/11. Windows 11 "Recall"
  is very concerning and users might not want their DOS gaming to be
  part of it's memory. (joncampbell123).
• Correct EGA switch readback from port 3C2h to reflect a value of 0x8
  instead of 0x9 when machine=ega200 (joncampbell123).
• Correct BIOS data area value that holds the "EGA switches" to reflect
  200-line EGA "emulation" when machine=ega200. Value 0x08 instead of 0x09
  (joncampbell123).
• Correct mode parameters for CGA 640x200 2-color mode when using
  machine=ega200 so that it displays correctly. (joncampbell123)
• DOS kernel: Remove fixed hacks for SFT and dynamically allocate the
  second SFT table for the last N - 5 file handles. Add code to zero
  SFT table memory to ensure that random data doesn't cause issues.
  Windows 3.1 is still perfectly fine with it, so the SFT table update
  and cleanup is complete. (joncampbell123).
• DOS kernel: Move the magic "CON" strings into the first SFT and
  mimic the 5 default open file handles that every DOS process starts
  with: CON CON CON AUX PRN. Windows 3.1 is still happy with it, which
  is good. (joncampbell123).
• DOS kernel: Put the CON driver somewhere else because allowing it
  to overlap the SFT is messy. Fix SFT generation to match the way that
  MS-DOS 5.0 does it where the first table is always 5 entries and the
  second table is always N - 5 entries. Cleanup the DOS memory allocation
  a bit. So far, Windows 3.1 doesn't have a problem with it. (joncampbell123).
• DOS kernel: Interrupt handler IRET was accidentally placed within
  the SFT table, move it up to resolve the conflict. (joncampbell123).
• Local DOS drive support: On Windows, if the guest is attempting to
  create a hidden file, make sure to call the right APIs to create a
  hidden file on the host. Not only is this needed to create a hidden
  file, but if the guest tries to create a hidden file and the file
  already exists as a hidden file, the file creation needs to succeed.
  Fix for "Facts of Life" by Witan because the demo creates a hidden
  WITAN.92 every time it is run (joncampbell123).
• XMS: Add dosbox.conf option to XMS driver to switch on flat real mode
  when a) the XMS driver initializes and/or b) when the XMS driver is
  called on to move/copy memory. (joncampbell123).
• INT 21h: If a DOS program frees a memory block, and then resizes the
  freed memory block, reassign ownership of that block to the program
  as if allocated. This is apparently canonical MS-DOS behavior. Added
  dosbox.conf option to control whether resizing a freed block silently
  assigns ownership (default setting) or whether it returns an error.
  DOS resize memory function for the most part DID assign ownership but
  not in the case where the size of the MCB was exactly the size requested
  to resize to. (joncampbell123).
• Sound Blaster: Fix bug where "force autoinit" prevented Sound Blaster
  playback from working at all, fix for "Jump" by Public NMI (joncampbell123).
• Debugger UI now shows PIC_FullIndex() and whether or not the CPU is
  in the HLT state. Single stepping does not do anything when the CPU is
  in the HLT state, so at least let the user know (joncampbell123).
• Keyboard controller (IBM PC): Cancel the IRQ signal upon reading I/O
  port 60h. The reason for the IRQ, the pending data, was just read, so
  now there is no point in keeping the IRQ signal up. This fixes Escape
  key problems with "Cronologia" by Cascada that causes part 3 "Time"
  to immediately exit and continue to the credits. Part 1 and 2 are not
  affected by the pending IRQ because those parts mask IRQ 1 and poll
  the keyboard controller directly. (joncampbell123).
• Fix complexity test code to determine when Odd/Even mode is enabled
  in all cases and to resolve a problem with garbled scrolling text
  in the "Vectorballs" part of "Unreal" (joncampbell123).
• M_EGA display mode now applies CRTC BYTE/WORD/DWORD shift to display
  start address, same as M_VGA, to ensure correct display when demos
  and games set the CRTC to non-BYTE modes. This fixes page flipping
  flickering during the "Vectorballs" part of "Unreal" by Future Crew.
  (joncampbell123).
• Update Configuration GUI to use radio buttons for selection, meaning the
  circular buttons that resemble those in Windows, not the check boxes.
  The GUI toolkit had them all along, the Configuration GUI was using
  check boxes for that for some reason. (joncampbell123).
• Linux ALSA MIDI output: Any attempt to send RESET or other Fx commands
  to the ALSA library causes a segfault in the ALSA library. Revise the
  ...

DOSBox-X 2024.03.01 2024-03-01 14:58

• If an empty CD-ROM drive is attached to IDE emulation, return "Medium Not
  Present" instead of a read error, when asked to read. (joncampbell123).
• Add "empty drive" CD-ROM image type "IMGMOUNT e: empty -t iso" as a way
  to emulate an empty CD-ROM drive with no disc in the drive. (joncampbell123).
• Add "empty drive" floppy image type "IMGMOUNT 0 empty -t floppy -fs none"
  as a way to emulate a floppy drive with no disk in the drive. (joncampbell123).
• Video debug overlay: Fix mouse integration misalignment when the video
  debug overlay is enabled while Windows is running (joncampbell123).
• Video debug overlay: Fix segfault when enabled with 15/16bpp SVGA modes.
  (joncampbell123).
• Video debug overlay: Fix bug where video debug failed to appear in SVGA
  15/16/24/32bpp display modes because of a design where the VGA drawing
  code points directly at video RAM except when drawing the hardware cursor.
  One symptom was that the video debug info on the side failed to appear at
  all, unless running in Windows and only within the vertical range of the
  mouse cursor. (joncampbell123).
• Video debug overlay: Do not bother showing the Attribute Controller palette
  in 15/16/24/32bpp SVGA modes because it doesn't matter there and is not
  involved with how anything is displayed. (joncampbell123).
• Video debug overlay: Fix debug info text to appear for 15/16/24/32bpp SVGA
  modes. (joncampbell123).
• BOOT --bios no longer triggers a system reset VM event, but instead just
  jumps to the new BIOS image after DOS kernel shutdown. This is needed for
  hardware and resources to stay as they were when running the BIOS i.e.
  keeping any IDE devices configured within the DOS kernel intact so that the
  BIOS can find and use them. Prior to this change, all hardware was fully
  reset and unmapped prior to running the BIOS which made IDE emulation
  unusable with BIOS images. (joncampbell123).
• BOOT --bios no longer immediately loads the new BIOS into memory, but instead
  loads and stores the image to a temporary buffer. The ROM image does not
  actually get mapped in until the DOS kernel and everything else has had a
  chance to shut down fully. (joncampbell123).
• Fix BOOT --bios not to try to load PC-98 ITF firmware unless actually running
  in PC-98 mode (joncampbell123).
• Write PC-98 keyboard translation table (non-shifted) in ROM BIOS and set the
  keyboard translation table pointer in the BIOS data area for "Nut Berry".
  This Nut Berry game also assumes lookup and translation tables exist at
  specific locations in the ROM BIOS, so put those tables there. The shift
  state table in BIOS has also been added, though at the moment, the tables
  are incomplete. (joncampbell123).
• MegaZeux from the MS-DOS days had a 256-color tweakmode that worked on some
  popular SVGA chipsets of it's time though on others it does nothing but halve
  the display resolution of text mode. The basic idea is that it makes the VGA
  card latch two 4-bit outputs of the VGA text mode into one 8-bit value, thus,
  256 colors possible. Add support for this. However I am not sure whether this
  tweakmode is supported by S3 chipsets, so it is OFF by default and you will
  need to add "enable supermegazeux tweakmode=true" to the [video] section of
  your dosbox.conf to enable it. (joncampbell123).
• Undo the "no partition offset" change. DOOM II for PC-9821 requires it to work
  else the page flipping fails and sprites and rendering flickers as you play.
  (joncampbell123).
• Allow text layer to appear in PC-98 256-color mode. Even though I was unable
  to enable it on real hardware, "Shamat, The Holy Circlet" requires having
  the text layer visible on top of 640x400 256-color mode for the introductory
  scrolling text to appear on screen. So for now, just allow it. (joncampbell123).
• The reason some PC-9821 games have been giving bad PITCH values (double the
  correct value) to the GDC in 256-color mode has been determined. They read
  port 9A0h to determine if the GDC is running at 5MHz or not. That port 9A0h
  index was not implemented and therefore gave the game the impression it was
  running at 5MHz when it was not, therefore the doubled PITCH value. This fix
  corrects the squeezed 256-color mode and allows it to appear properly.
  (joncampbell123).
• IMGMOUNT: If the file extension is HDI, assume a hard disk image even if the
  image file is small enough to qualify as a floppy disk image. There is an
  HDI image of PC-98 game "D.O. Doki Doki Disk 8" that is 2.2MB, small enough
  to be mistaken as a 2.88MB IBM PC floppy disk and therefore fail to mount
  as an HDI image, this change fixes it. (joncampbell123, maron2000).
• Emulate PEGC PC-98 linear framebuffer at both 0xF00000-0xF7FFFF (at 15MB
  memory mark) but also make it appear at top of memory below BIOS (normally
  at 0xFFF00000-0xFFF7FFFF). Some 32-bit PC-9821 CD-ROM MS-DOS games assume
  the top of memory alias and will fail to show anything on screen without
  it (unless, alternatively, the memalias setting is set to emulate 24 address
  lines like a 386SX). Now to figure out why these same games are programming
  a GDC PITCH value that's double what it should be... (joncampbell123).
• PC-98 GDC scan offset no longer pays attention to scan offset of data
  partition in 256-color mode. Required to help fix broken 256-color graphics
  for some PC-98 CD-ROM games. (joncampbell123).
• Refuse to enable ISA 15MB-16MB memory hole if memalias is set to 24 bits or
  less. Not only is it redundant to do that but it also causes the BIOS to
  immediately crash on startup. (joncampbell123).
• IDE ATAPI CD-ROM emulation: In PC-98 mode when emulating a NEC CD-ROM drive,
  also limit sector reads to one CD-ROM sector per DRQ because the MS-DOS driver
  assumes that behavior. The driver will stall and error out if it requests a
  multi-sector read and the drive does NOT limit transfers to one sector at a
  time per IDE data transfer. This is in line with my experience writing the
  DOSLIB IDE testing program and laptops from the 1990s with IDE ATAPI CD-ROM
  drives, so it's understandable. (joncampbell123).
• The reason the CD-ROM driver in PC-98 game HDI images refused to talk to our
  IDE CD-ROM emulation is... (drumroll) we didn't report ourself as an NEC
  CD-ROM drive when given the MMC INQUIRY command. Yes, really. The OAK CD-ROM
  driver in these HDI images really does care whether or the drive is an NEC
  brand drive. What a stupid reason not to talk to a CD-ROM drive. Add code to
  default to "NEC" "CD-ROM DRIVE" as the INQUIRY result if running in PC-98 mode.
  (joncampbell123).
• Add basic rudimentary support for CloneCD (*.ccd *.img) images. It might not
  work with more complex arrangements but it is enough for most CD-ROM PC-98
  games so far. (joncampbell123).
• libpng supports the pHYs PNG chunk which describes the pixel aspect ratio of
  the PNG image. libpng 1.6 has it, use it. Programs that support the information
  like FFMPEG will then display the PNG image with the correct aspect ratio.
  (joncampbell123). [https://github.com//issues/4754]
• PC-98 mode: There is a 302KHz timer behind I/O ports 5Ch/5Eh that some MS-DOS
  drivers depend on for timing, particularly a popular IDE CD-ROM device driver
  in many PC-98 game HDI images. This change allows the driver to time out after
  about 5-10 seconds instead of an infinite hang. (joncampbell123)
• Fix INT 10h to keep hardware CRTC I/O port synchronized with BIOS DATA area
  copy so that other parts of INT 10h called by SetVideoMode do not accidentally
  talk to the wrong I/O ports. This fixes corrupted INT 10 Mode F display
  (640x350 monochrome graphics mode). (joncampbell123).
• Add DOS Int21 0x5D 0x00 - remote server call
  Inspired by FeeDOS inthndlr.c
  With this change it is possible use a plain dosbox-x to install and run
  Windows for Workgroups V3.11 as an IPX server on the pcap ne2000 interface
  offering a host directory for read and persistent write access to an
  MSDOS machine running a WfW 3.11 IPX network client.
  Please don't forget mounting with -nocachedir
  (Issue #4162)(Yogi-baer)
• Fix missing keystroke SDLK_LESS on DE keyboard on Raspbian OS (Yogi-baer)
• Fix crash when loading a language file without existing menu item "ttf_extcharset" (Yogi-baer)
• Change ISA memory hole 512kb option from boolean to true/false/auto. (joncampbell123)
• Add ISA memory hole 15mb option, make it true/false/auto.
  Auto means off for IBM compatible mode and on for PC-9821 compatible mode.
  This should allow some DOS games that depend on the linear framebuffer
  to work properly even if memsize=16 or higher. (joncampbell123)
• MIDI: set minimum sysex delay when enabled (mistydemeo)
• International support in LABEL, COPY, DEL builtin commands (maxpat)
• Fix palette setting bugs due to SETCOLOR fix in 2023.10.06 release. (maron2000)
  Graphical glitches in Ultima VI(#4507), Chessmaster 3000(#4510), Wizardry VII(#4534)
  Crash Sid Meyer's Civilization I (#4511)
  TTF color settings regarding 'colors' option (#4579, #3318) and some more
• Fix crash when mounting floppy/ISO images with no extension (maron2000)
• Fix Intel macOS CI builds crashed on startup due to missing dylibs
  (Issue #4438)(maron2000)
• Fix TTF mode didn't switch to graphics mode on certain types of machines
  such as tandy/pcjr.(Issue #4559)(maron2000)
• Fix crash on switching to fullscreen when output=opengl (Intel macOS) (maron2000)
• Update DXCapture shell command to support /O for OPL capture (AranVin...

DOSBox-X 2023.10.06 2023-10-06 23:24

2023.10.06

• Add "VRD" debugger command to force redraw of the VGA screen.
• Add VGA debug set commands to force a video start address and another
  to clear all debug settings.
• Add "PITSYNC" option to VFRCRATE command. "VFRCRATE PITSYNC ON"
  directs the system timer interrupt to synchronize tick rate with
  vertical refresh rate of VGA emulation if the game or demo set
  the timer tick rate to a value close enough to vertical refresh.
  This is intended for games or demos that use the system timer for
  a vsync interrupt.
• IMGMAKE: Fix bug where if -bat was specified, the generated .bat
  file would attempt to mount the .bat file, not the disk image.
• IMGMAKE: If -nofs and -bat was specified, the generated .bat file
  will refer to "IMGMAKE 2" instead of "IMGMAKE C"
• DOS FAT driver: When the guest sends in a new BIOS Parameter Block,
  recalculate the disk locations and FAT type properly instead of
  assuming that FORMAT.COM is using the same format already present.
• DOS FAT driver: If the partition is unformatted and looks as if
  freshly written by FDISK, then instead of failing to mount, mount
  the partition instead as an unformatted partition and fail file
  I/O until a BPB is set and the partition formatted by FORMAT.COM.
  This matches MS-DOS behavior and it makes it possible to mount an
  image, FDISK it, restart, FORMAT.COM the unformatted partition,
  and end up with a working drive letter (just like MS-DOS). So far
  verified against MS-DOS 6.22 and Windows 98 versions of FDISK,
  FORMAT, SYS, and SCANDISK.
• DOS FAT driver: Add options -o sectoff and -o sectlen to make it
  possible to manually specify the start and length of a partition.
  Future code will use this internally as well.
• IMGMOUNT: Allow *: as a drive letter to mean automatically pick a
  drive letter.
• Fix debugger to use toupper(), but only for ASCII range ncurses
  keycodes.
• Timer PIT: If the guest writes the counter value while the counter
  gate is off, make sure the counter read back is the same value
  written regardless of gate status. Prior code returned the stale
  latched value of the counter as it was prior to shutting off the
  gate and writing the counter, causing timing issues.
• Fix restoring minimized window on TTF output (Issue #4248) (maron2000)
• Fix macos crash on launch when output=surface or auto (SDL2) (maron2000)
• Update in-tree SDL2 library to ver 2.28.2 (maron2000)
• Updated build tool for MinGW lowend builds required for the updated SDL2
  library. As a result, MinGW lowend builds are now able to enable debugger
  features. (maron2000)
• Debugger RUN and RUNWATCH commands were broken, fix. Make sure debugger
  shortcut triggers execution to stop whether in RUN or RUNWATCH mode.
• Fix SETCOLORS command didn't change color when output=ttf.(Issue #4503)
  Also fixed the values reported were wrong. (maron2000)
• BIOS CMOS date/time functions will now idle the CPU 4 times after reading
  or setting the clock to allow interrupts, CPU time, and RTC clock ticks
  to proceed normally. This fixes "Pizza Tycoon" and allows it to continue
  past the initial logo. (joncampbell123)
• Fix segfault when mounting hard disk images with no file extension
  (joncampbell123).

DOSBox-X 2023.09.01 2023-09-01 17:00

2023.09.01

• Disable by default message confirmation after snapshot and AVI video
  capture, but leave the option there for those who want to enable it (joncampbell123).
• Remove "LOG: Logging output has been disabled." output when -nolog
  is specified on the command line (joncampbell123).
• Fix stuck Ins key problems by fixing a typo in src/ints/bios_keyboard.cpp.
  The code is supposed to clear the "Ins key down" flag, but instead cleared
  all bits EXCEPT "Ins key down" (joncampbell123).
• NE2000 macaddr default is now "random", which instructs the NE2000
  hardware at startup to pick a random MAC address. (joncampbell123).
• IPX: If NE2000 and IPX are enabled, and an IPX tunneling connection is
  active, and the user boots a guest OS, switch on a mode where all IPX
  packets going to and coming from the guest are re-routed through the
  IPX tunnel instead of to the NE2000 ethernet backend. This feature
  makes it possible to play IPX-based games in a guest OS like MS-DOS
  and Windows 95. (joncampbell123).
• IPX: Add extension to server to allow clients to register their own
  MAC address instead of using the default MAC address given by their
  IP address and port number. The extension is designed so that if DOSBox-X
  is a client to another DOSBox fork's IPX tunneling server, it will
  be ignored and DOSBox-X will get the usual MAC address instead. This
  extension is required for guest OSes to be able to use the IPX protocol
  through the NE2000 card given upcoming code changes as they normally
  use the network card MAC address when picking an IPX address because
  the IPX interface is not available once booted into a guest OS. (joncampbell123).
• IPX client: If both IPX and NE2000 emulation are enabled, IPX emulation
  will use the NE2000 card's MAC address instead. It will use the IPX
  server DOSBox-X extension to try. If it doesn't work, then the normal
  MAC address assignment is accepted without complaint. (joncampbell123).
• NE2000: Add "nothing" backend. It receives nothing and send packets go
  nowhere. If no other backend is available, this backend is a fallback
  so that at least the NE2000 emulation can work. The other purpose of
  a nothing callback is to give NE2000 something to talk to for those
  who wish to use the upcoming IPX packet redirection to link DOS and
  Windows games over the IPX client or server connection to other
  instances of DOSBox. (joncampbell123)
• Added record function to capture NE2000 network traffic to a
  pcap/Wireshark file in the capture directory. (joncampbell123)
• Fixed bug where guest VM reset causes the CMOS to stop ticking for
  exactly the amount of time it was running before reset. (joncampbell123)
• Added alarm interrupt function to RTC CMOS emulation (joncampbell123)
• Reverted DOS to using the BIOS_DATA tick count for time and the cached
  copy of date it keeps internally, rather than always calling INT 1Ah.
  It turns out that is how DOS actually behaves, which is also why it is
  possible for the DOS and CMOS RTC to diverge. Fix CMOS emulation to
  allow get/set time and to run in emulation time, not real time, though
  the clock starts from the host time. (joncampbell123)
• Fixed VHD disk image calculation of footer position and, thus, of newly
  allocated block position. (maxpat78)
• Enhanced Dynamic and Differencing VHD support #4273 (maxpat78)
• Imported IBM Music Feature Card support from DOSBox Staging. (Allofich)
• Fix IMGMAKE large size image error on MinGW builds (maron2000)
• Set usescancodes=true when non-US keyboards are detected. (Linux / MacOS
  builds) (maron2000)
• Fix day of week detection (INT 21h function 0x2Ah). (maron2000)
• Refine KEYB and CHCP command (maron2000)
• Use segment descriptor's big flag (if present) when disassembling code in
  the debugger code view (cimarronm)
• Add decoding of rdmsr/wrmsr instructions to disassembler (cimarronm)
• Fix disassembly for far jmp/call decoding (cimarronm)
• Fix memory limits on expand-down segment descriptors (cimarronm)
• Bump tinyfiledialog to ver 3.13.3 (maron2000)
• Fix mouse column limit on text mode (issue #4353) (maron2000)
• Fix Blocek launching failure (issue #4385) (maron2000)
• Bump in-tree FreeType library to ver 2.13.1 (maron2000)
• Enable debugger function for MinGW builds (maron2000)

DOSBox-X 2023.05.01 2023-05-01 10:30

2023.05.01

• IMGMAKE will choose LBA partition types for 2GB or larger disk
  images, but the user can also use -chs and -lba options to override
  that choice. The CHS or LBA partition types do matter because it
  affects which version of INT 13h is used by Windows 98/ME to boot up
  and, if drive C: is in compatibility mode, at all times. (joncampbell123)
• PC-98 256-color mode will also trigger the auto mode of "render on
  demand" for performance reasons because per-scanline raster effects
  are very unlikely in that case, as will MDA and Hercules machine
  types. (joncampbell123)
• When the DOS IDLE API is enabled (by default), limit STI+HLT to
  occur on INT 28h only once after any call to read the CON device
  or call to BIOS INT 16h to read the keyboard. This fixes stalls
  and sluggish input problems with programs that like to call INT 28h
  often like the Pacific C compiler PPD IDE interface. (joncampbell123).
• Hercules InColor machine type: Fixed attribute and RAMFONT handling
  of 48K RAMFONT mode and added planar text rendering. (joncampbell123).
• Write BIOS data area fields for number of rows, char height, etc.
  for MCGA machine type in addition to EGA/VGA machine types because
  IBM technical references suggest it's there for MCGA as well.
  This also resolves an issue where with the MCGA machine type, INT 10h
  failed to print any text to screen whatsoever. (joncampbell123).
• Render on demand (Staging calls it "lazy rendering") now defaults
  to "auto" and allows an "auto" setting. The auto setting will
  turn it off for standard VGA modes and will turn it on for SVGA
  modes where per scanline raster effects are very unlikely to
  occur. This may provide a performance boost for DOS games in SVGA
  modes and the Windows desktop (joncampbell123).
• CGA 320x200 4-color mode is now rendered using the M_EGA render
  code for EGA/VGA machine types to better reflect real hardware.
  (joncampbell123).
• Fix bug where setting doublescan=false for anything other than
  the VGA machine type would break CGA graphics modes.
  (joncampbell123).
• Fix video debug overlay calculations of source video mode for
  CGA graphics modes. (joncampbell123).
• CGA 640x200 2-color mode and MCGA 640x480 2-color mode are no
  longer rendered as M_CGA2 for EGA/VGA machine types. The reason
  is that at the hardware level they are really just IBM standard
  tweaked versions of the EGA/VGA 16-color modes with additional
  bits for the interleave emulation and can be properly emulated
  with the M_EGA renderer. M_CGA2 is still used for the CGA and
  MCGA machine types for those modes. The DCGA DOS/V mode has been
  carefully made into it's own render mode instead of part of the
  M_CGA2 case. (joncampbell123).
• Fixed refcount -1 error and abort when multiple floppies are
  attached to a floppy drive and the "Swap floppy" mapper shortcut
  is used at least once (joncampbell123).
• Hercules palette selection now provides a "dark gray" color
  mapping to match the green, amber, or gray palette selection of
  the user (joncampbell123)
• Fix Hercules vs MDA attribute handling of "dark gray" background
  color when hardware blink is disabled. (joncampbell123)
• Added RAMFONT emulation to Hercules Plus machine type, fixed code
  to allow Hercules Plus text mode to draw farther than the first 4KB
  of RAM if RAMFONT enabled. (joncampbell123)
• DOS kernel: Fix programming mistake that allocated perhaps a bit
  too much DOS kernel memory for the "List of Lists" info block.
  Fix the sizes of the info block and other structures to make sure
  specific kernel structures are placed at fixed addresses because
  later Microsoft software for MS-DOS checks those values.
  (joncampbell123)
• Serial port: Add multiplier: setting as requested to enable
  faster than 115200 baud rates. (joncampbell123)
• Fix mistakes in CPUID emulation that threw a #UD exception for
  specific cases where EAX was not recognized by particular CPU
  types. (joncampbell123)
• Fix RTC clock emulation to correctly signal IRQ8 interrupt for
  both periodic tick and update-ended events. Prior to this fix,
  only periodic tick events were reported even if the bit was set
  to enable update-ended. (joncampbell123)
• Fix serial and AUX PS/2 mouse emulation to not send relative
  motion unless mouse captured, to make it consistent with the
  BIOS PS/2 mouse emulation (joncampbell123)
• FAT driver: Major performance boost is possible by eliminating
  unnecessary code that re-reads the entire directory when looking
  up or changing one particular directory entry. (joncampbell123).
• CMOS registers: Fix code to allow getting and setting time,
  fix year vs century registers to work properly. (joncampbell123).
• BIOS INT 1Ah: Fix functions to get and set time and date
  instead of faking on read and ignoring set. Use the CMOS
  registers. (joncampbell123).
• DOS INT 21h: Fix date and time functions to call the BIOS for
  time instead of trying to fake it only at the DOS level. This
  includes allowing INT 21h to change the date/time using the
  BIOS. (joncampbell123).
• DOS shell: Make TIME actually use INT 21h to set time instead of
  directly modifying the BIOS timer tick count in the BDA.
  (joncampbell123).
• Increased PIC event queue size, there are corner cases especially
  with Windows XP that can occasionally overrun the queue.
  (joncampbell123).
• Updated IBM PC keyboard emulation to correctly encode Pause and
  Print Screen key scan codes when shift, alt, and ctrl are held
  down. This makes it possible to type "Alt+SysRq" for programs
  that expect it, including SoftICE. (joncampbell123).
• NE2000 emulation: Looking at recent Bochs source code, ne2k.cc
  appears to have downgraded the "IMR write, reserved bit set"
  message from BX_PANIC to BX_ERROR. Update the same in DOSBox-X
  so that Windows 2000 no longer crashes the emulator with E_Exit()
  when probing the NE2000 hardware. (joncampbell123).
• INT 33h mouse services: Add "Get General Driver Information"
  function for Microsoft Word 5.5 (joncampbell123).
• INT 33h mouse services: Render cursorType == 2 (graphics cursor)
  as if text cursorType == 0 if the current mode is text mode.
  Microsoft Word 5.5 always calls functions to set text AND graphics
  cursor regardless of whether the actual mode is graphics or not.
  This fix allows the cursor to show correctly as the block cursor
  it wanted in text mode instead of a moving hardware blinking cursor.
  (joncampbell123).
• Fixed S3 XGA emulation bitmap rendering to correctly handle
  8/16/32-bit pixel transfer I/O and update comments to reflect
  the 32-bit byte aligned transfer mode of the Trio chipset.
  This fixes incorrectly drawn radio buttons and 16x16 icons
  in Windows NT 3.5, Windows NT 3.51, Windows NT 4.0, and
  Windows 2000. (joncampbell123).
• Fixed keyboard emulation so that upon the keyboard reset command
  FFh, the keyboard does the reset process and THEN sends back
  bytes 0xAA (power on/reset OK) and 0x00 (interface self-test).
  This resolves the issue where Windows NT 3.1 pauses at startup and
  does not resume booting until you press a key on the keyboard.
  This also resolves the issue where Windows NT 3.5 keyboard and
  mouse input stops working completely if you press a key on the
  keyboard. (joncampbell123).
• Add Hercules InColor emulation of MDA vs CGA attribute select,
  and make sure it obeys the blink setting (joncampbell123)
• Change Hercules/MDA text output to render 9 pixels per char
  if the char9 setting is on, to match the 9x14 character cell
  that those cards emit to the screen. The user can always turn
  it back off to get the 8x14 text they're probably accustomed
  to in other DOSBox forks. (joncampbell123)
• Render output fixed to never double pixels vertically on render
  if the machine type is emulating VGA and the Doublescan option
  is enabled, in order to help resolve SVGA text mode issues
  reported by ThomasKjoernes (joncampbell123)
• Add InColor CRTC registers and add code to emulate the planar
  bitplane operations. Microsoft Flight Simulator 3.0 renders
  correctly now. (joncampbell123)
• Update Hercules InColor code to render the same 64-color EGA
  palette as machine=ega. (joncampbell123)
• Correct machine=hercules text rendering flaw that prevented
  the bright attribute (bit 3/7) from working, making all text
  output the same normal brightness. (joncampbell123)
• Add expected data structures and signatures to VGA ROM BIOS at
  C000:0000 if machine type selects ATI emulation (joncampbell123).
• Add ATI machine types, which at this time, is just a placeholder
  for development to go in that direction over time for those
  machine types. (joncampbell123)
• Added "machine=hercules_plus" and "machine=hercules_incolor" as
  stubs to be developed on going forward to emulate the HGC+ and
  InColor cards. Note that InColor will require the MCH_HERC case
  to generate 64-color EGA-like output going forward even if the
  documented stratup state still emulates the MDA-like monochrome
  attributes. (joncampbell123)
• SDL2: Stop checking for compiler flags that make it an error to
  declare variables after statements in a function or any other
  terrible sins that would offend old C89 standard compilers.
  DOSBox-X is never going to compile for a C standard that old.
  Furthermore this check is preventing compilation on ARM-based
  Macbooks for some reason, though not Intel based Macbooks.

DOSBox-X 2023.03.31 2023-03-31 23:59

2023.03.31

• "mount -t overlay" will now print a message on the console to
  let you know if the act of mounting the overlay replaced a
  previous overlay mount. Overlay mounts cannot be stacked in
  DOSBox-X (and probably most DOSBox forks that support overlays)
  and the user should understand that. (joncampbell123).
• Remove kludges from DOS path resolution to handle drive paths
  that refer to drive @ (at sign). Note that in ASCII the at sign
  is one code below capital "A". Windows 95 FORMAT.COM due to
  another issue was asking for "@:\WINBOOT.SYS" and sometimes
  causing a segfault in DOS path resolution due to an uninitialized
  drive index. The fix for the other issue removes the need for this
  kludge. In it's place a message will be logged to your log file if
  anything attempts to access files on drive "@:" because it likely
  means a failure to determine the drive index properly. (joncampbell123).
• In addition to reporting the "boot drive" via INT 21h AX=3305h, also
  write boot drive in the "List of Lists" structure. Windows 95
  FORMAT.COM reads the boot drive from the LoL and does not do any
  error checking if that value is out of range (such as if it was
  never set and the byte value is zero). Failure to set this field
  will result in FORMAT.COM attempting to access "@:\WINBOOT.SYS"
  and "@:\IO.SYS" and failing. (joncampbell123).
• Add dosbox.conf option to set a fixed RTDSC tick rate to use at
  all times during emulation instead of the CPU cycle count
  (joncampbell123).
• Fix RDTSC to maintain a monotonic increasing count even if the
  CPU cycles count changes, and better handle timestamp writes
  through WRMSR (joncampbell123).
• FAT filesystem driver: Instead of searching from cluster 0 every
  time a new cluster is to be allocated, keep track of the search
  to help reduce slowdowns on fairly large filesystems when many
  files are copied onto it (joncampbell123)
• Page Up/Down vs Roll Down/Up was in the wrong order, switch order
  to correct it. (joncampbell123)
• Fix 'pc98 force ibm keyboard layout' was always forced to be 'true'
  for left & right bracket keys on US keyboards. (maron2000)
• Fix dynamic_nodhfpu FPU stack bugs, the same bugs that once plagued
  dynrec. dynamic_x86 never seemed to have the same problem because
  in reality the DH FPU case was normally used, to hit this bug you
  had to use core=dynamic_nodhfpu. Also fix dynamic x86 DH FPU code
  never to restore from DH case if the DH FPU code was never enabled,
  which periodically caused FPU state to dissapear. (joncampbell123).
• Add dosbox.conf option to control the MSCDEX.EXE device name when
  emulating a CD-ROM drive (joncampbell123).
• Wengier coded this nice text-only DOSBox-X logo for the TTF output.
  Fix border alignment issues and make the text logo the default and
  only option for MDA and Hercules machine types at boot.
  (joncampbell123).
• Add -print-ticks command line option, which enables code to print
  both SDL_GetTicks() and emulator time once a second to the console
  and the log file. This may help in tracking down bugs related to
  long term laptop suspend or suspension of the process in general.
  (joncampbell123).
• PC-98: Ignore INT 18h AH=0Ch (enable text layer) in 256-color mode.
  Real hardware doesn't seem to let you turn on the text layer in
  256-color mode, though I am not certain if this is a restriction
  imposed by the BIOS or by the hardware. This fixes possible cases
  where Sim City 2000 in 256-color mode reveals garbage text data at
  the bottom of the screen if it is there when it starts. This doesn't
  fix the issue where Sim City 2000 cannot set 640x480 256-color mode
  properly unless your display is already set to 31Khz hsync because that
  is evidently a bug in the game, not DOSBox-X. (joncampbell123).
• PC-98 256-color mode: Fix "Active Display Words" value set by INT 18h
  to 40, not 80, for graphics layer. This has no apparent effect on
  games but it does fix the sometimes erroneous graphics layer width
  in the video debug display. Neko Project II source code seems to
  indicate the 31KHz hsync mode is programmed that way even if 256-color
  mode. This should not break anything since the GDC doesn't let you
  read back the "SYNC" reset parameters anyway--this isn't VGA hardware,
  after all. (joncampbell123).
• IPX emulation was broken because it set up the virtual file, IRQ
  and interrupt handler way too early, which the BIOS startup would
  then overwrite with the default BIOS IRQ handler. IPX emulation
  should work now, at least multiplayer DOOM. (joncampbell123)
• Added debug menu and dosbox.conf option to show debug information
  at the bottom of the screen when enabled. This debug information
  reflects the video state at the start of active display. It can be
  used to see in real time the state of the palette, display offset,
  display stride, and other useful information. It is rendered into
  the frame on purpose so that it appears as part of the picture
  when you take a screenshot or record a video to AVI or MTS for
  later review. (joncampbell123)
• Dynamic core: Fix serious bug in dynrec dynamic core where calls
  to handle x86 FPU instructions erronously passed the entire
  FPU status word instead of passing only the FPU stack pointer.
  The result of this error was that floating point was erratic,
  buggy, and often caused memory corruption in DOSBox-X eventually
  leading to a crash. It should now be possible to properly run
  DOS games on dynrec based systems, including ARM-based M1 Macbooks,
  that use the FPU. (joncampbell123)
• Debugger: When entering debugger interface, force dynamic core
  to flush it's state so that the debugger can show the correct
  state to the user when they use the "FPU" command to see it.
  (joncampbell123).
• VGA emulation: Automatically ignore odd/even mode if "Chain 4"
  mode is enabled in the sequencer (normally enabled only for
  256-color mode). Some games accidentally set odd/even mode
  in 256-color mode and yet apparently worked just fine on real
  hardware. Without this change, such games will display distorted
  graphics. It makes logical sense "Chain 4" would take priority
  over odd/even mode. Note: If a game uses 256-color unchained mode
  AND foolishly enables odd/even mode, then the resulting distorted
  graphics are probably accurate to what would happen on real
  hardware, but then programmers would have caught their mistake
  and fixed it so that is very unlikely to occur. This helps to fix
  "Seal: Magic Eye" although some remaining visual artifacts in the
  game can only be resolved by setting machine=svga_et4000
  (joncampbell123).
• Set usescancodes=true when non-US keyboards are detected
  (Windows builds) (maron2000)
• For long double without using x86 FPU, the code still calls the
  fstcw instruction and can enable FPU exceptions that crash the
  emulator, therefore mask off all exception bits to stop that.
  (joncampbell123)
• Added code to mouse emulation to control how often the mouse
  reports events through the interrupt. Added dosbox.conf option
  to allow the user to force a report rate, which can be used to
  force a lower than normal report rate for games that cannot
  proprly handle higher ones. Allow PS/2 mouse emulation, if
  rate not set by user, to control report rate. (joncampbell123).
• Add code to COMMAND.COM to flush keyboard input before running
  the command given by the user, and flush again when the command
  returns. Added option to dosbox.conf to enable/disable this
  function (joncampbell123)
• Fix bug where Tandy mode ignored the "allow more than 640kb"
  setting.
• Fix INT13h AH=02 broken conditional branch which prevents
  installer of game "Inherit the Earth: Quest for the Orb"
  to obtain free space of hard drive (maron2000)
• qcow2 image support: Make image able to be mounted by
  drive letters (experimental) (maron2000)
• VHD image support: Make file name check for .vhd extension
  to be case insensitive (maron2000)
• VHD image support: Fix auto-detection of geometry (maron2000)
• Sound Blaster: Added code to periodically check the user's
  settings regarding recording source selection and listening.
  This should allow the user to change those settings on the
  fly. (joncampbell123).
• Sound Blaster: Added options to control whether the generated
  recording source is audible through the speakers, and what
  generated audio to send to the client. Options are: silence,
  hiss, and a 1KHz test tone. (joncampbell123).
• Sound Blaster: If the DSP is recording rather than playing,
  then send audio to the guest at the recording sample rate
  containing some form of generated audio. Default is silence.
  This ALSO satisfies the Creative driver CTSB16.SYS when it
  does the DMA test at startup. (joncampbell123).
• Sound Blaster: Fixed code to properly recognize when the
  guest wants to record audio, including through SB16
  commands. Prior to this fix, all SB16 Bxh-Cxh commands
  were handled as if playback even if the command would
  instead trigger recording. (joncampbell123).
• Sound Blaster: Add missing update of "last DMA callback"
  timestamp that is needed for when the guest pauses DMA
  during playback or recording. (joncampbell123).
• VHD image support: If the VHD image is not a fixed type,
  say so in the log (previously it said nothing) and say
  what kind of image was mounted (joncampbell123).
• Added INT 13h AH=44h Extended Verify to satisfy any disk
  utilities that might u...

DOSBox-X 2022.12.26 2022-12-26 19:55

2022.12.26

• Allow more than 640KB of conventional memory,
  regardless of "allow more than 640kb" option, for
  Tandy machine type. The setting is capped to 768KB
  to reflect Tandy systems with that upgrade, which
  is said to allow a full 640KB for DOS and 128KB for
  video RAM without any conflict from the MCB chain.
  Adjust Tandy video emulation for 768KB case. This
  fixes "Might and Magic III Isles of Terra" crashes
  in Tandy mode and Tandy graphics because the game
  does not correctly handle the memory configuration
  when less RAM is involved. (joncampbell123).
• Fix code page CPI/CPX loader to allocate 128KB of
  memory instead of 84KB. The code allocates a 64KB
  stack for the executable code within. The 84KB
  allocation permitted the initial stack pointer to
  exist beyond available conventional memory if
  conventional memory size was below about 156KB and
  cause a crash. This is a quick fix, a long term fix
  would be to instead set the initial stack pointer
  to some offset below 0xFFFE based on available memory,
  just as the .COM executable loader was modified to do
  some time back to enable proper execution when
  memsize < 64KB. (joncampbell123)
• Do not load country/font information at startup
  if the code page to load is the same as the default
  code page. (joncampbell123)
• Fix Tab/Shift+Tab in Configuration GUI regarding
  setting text fields that have a ... button to select
  from an enumeration. Those buttons are no longer a
  trap for tab enumeration. (joncampbell123)
• Fix Mac OS SDL1 keyboard support code to properly
  fill in unicode character values in relation to
  IME checks. This fixes a problem where it was
  impossible to type anything in the configuration GUI
  in SDL1 Mac OS builds. (joncampbell123)
• Mark VBE mode 0x212 as "do not list" so that it does
  not appear in normal VBE mode enumeration, while
  keeping it valid for the Windows 3.1 driver which
  assumes the mode is there at that number without
  enumeration. By not listing the mode, drivers like
  VBEMP and DOS application code will not attempt to
  use it. There is already another mode number for
  640x480 24bpp anyway. (joncampbell123)
• Fix VBE mode 0x212, which is 640x480 24bpp packed
  mode but with a per scanline stride of 2048 bytes
  per pixel set aside for the Windows 3.1 driver and
  the "640x480 (1Meg) 16 million colors" setting,
  so that the VBE "Get Mode Info" call reflects the
  proper per-scanline stride instead of the ideal one.
  This should fix complaints about VBEMP and 640x480
  24-bit color mode. Given how minimal the use of the
  mode is by the Windows 3.1 driver, the 2048 byte
  mode does not permit setting scan line length or
  display start i.e. panning is not permitted.
  (joncampbell123).
• Fix Pentium Pro emulation to support microcode
  related MSRs so that Windows 98 does not crash
  on startup when cputype=ppro_slow. (joncampbell123).
• Added SMV debugger command. This is the linear
  (virtual) equivalent of the SM "Set Memory"
  command. (joncampbell123).
  (#3826)
• Fix debugger help command to list both C / D commands
  and the DV/DP commands. (joncampbell123)
• Add VGA FONTDUMP debugger command for those
  who might want to take custom fonts in text
  mode and do something with them outside the
  emulator. "VGA FONTDUMP" followed by a filename
  which must have the extension .BIN (for a raw
  64KB dump of font RAM) or .BMP (for a formatted
  dump as a monochrome bitmap file). (joncampbell123).
• Disabled code to randomly return GDC drawing
  status active. The implementation was causing
  severe performance issues. The code has not
  been removed because it could be optimized and
  fixed and could even follow the state of GDC
  drawing. (joncampbell123)
• VGA 6-bit DAC mode expand to full 8-bit range,
  instead of simple shifting (joncampbell123).
• Fix 8254 PIT emulation (joncampbell123)
• Add dosbox.conf option "cpuid string" to allow
  CPUID to return custom ID strings instead of just
  "GenuineIntel". Have fun! (joncampbell123)
• Fixed build to properly compile against internal
  SDL/SDL2 library even if an external version is
  available (joncampbell123)
• Fixed some violations of the one definition rule.
  (Jookia)
• Use pkg-config to find OpenGL (Jookia)
• Updated Flatpak SDK and dependencies (Jookia)
• PC-98 Implement AVSDRV.SYS PCM function (int D9h)
  (nanshiki)
• PC-98 Support 6x8 Katakana font with int 18h ah=14h
  (nanshiki)
• PC-98 Fix Audio Q-Channel info in MSCDEX (nanshiki)
• Fixed FFMPEG 5 compatibility (Jookia)
• Fix FFMPEG crash if FFMPEG fails to write header
  for some reason. (joncampbell123)
• Fix setcap on systems with split /usr (Jookia)
• Fix building with --disable-core-inline (Jookia)
• Fix building not finding fluidsynth (Jookia)
• Fix some NetBSD build issues
  (Jookia, with patch from Nia)
• Fix minor graphical issues in mapper GUI (aybe)
• Removed --disable-core-inline (Jookia)
• Swap SDL2 XInput axes by default for a better
  out of the box experience (aybe)
• SDL1 XInput is now enabled by default for
  a better out of the box experience (aybe)
• add set of cga shaders from dosbox staging (aybe)
• Updated mt32emu code to latest(2.7.0).(maron2000)
  Also, added config option "mt32.engage.channel1"
  (Refer to https://github.com/munt/munt for details)
• Fix missing line in printouts (Issue #3569)
  (maron2000)
• Adjust Int 11 return value to better match real
  BIOSes. (Allofich)
• Limit the "always return bit 6 of port 61h as set
  for PC" change to only apply to early PC types
  (MDA, CGA or Hercules). (Allofich)
• Integrated SVN commits (Allofich)
  • r4476: Preserve last error code when no error
    occurs.
  • r4477, r4478: Drive system improvements.
  • r4479: Correct handling of invalid encodings of
    the BOUND instruction.
  • r4480: Some confirmed DOS behaviors and minor
    cleanup.
  • r4481: Push registers for most DOS function calls;
    prevents a bug in UNLZEXE from causing a crash, and
    maybe helps other buggy programs and unusual cases.
    Use real addressing to support stack pointer wraparound.
• Fix Opl3! Duo and Opl2 Audio board audio playback on
  unix (stengun)
• Fix Japanese input related issues (nanshiki)
• Fix START command only ever opens first file
  (NebularNerd, darac-10, aybe)
• Win32 logging console (aybe)
  • add 'Debug/Clear logging console' menu entry
  • ensure main window stays above it when shown
• Fix overflow in mapper info on SDL2 builds (aybe)
• Enable OpenGL output in MinGW builds again (maron2000)
• Fixed to display IME marked text in SDL2 version on
  macOS (nanshiki)
• Fix allocation of IDE slots when mounting images by
  IMGMOUNT (maron2000)
• Increase of sprintf buffer size in Program::WriteOut()
  (caiiiycuk)
• Fix unexpected behavior of swapping multiple CD images
  (maron2000)
• Fixed build on NetBSD and FreeBSD (Jookia)

DOSBox-X 2022.09.0 (0.84.3) 2022-09-01 16:22

Note: Installation instructions are available from the INSTALL page. Also, always check out the DOSBox-X homepage for latest updates.

2022.09.0 (0.84.3)

• Added 86PCM support for PC-98 emulation. (nanshiki)
• Added German language translation. (Link-Mario)
• Added code page 867 (compatible with Hebrew DOS
  WordPerfect) and 868 (Urdu) for the guest-to-host
  code page conversions. (Wengier)
• Improved ANSI.SYS detection for the welcome banner
  and CLS command. The command "INTRO WELCOME" will
  re-display the welcome banner without running the
  commands in AUTOEXEC.BAT. (Wengier)
• Improved IME support on macOS SDL2 build. (Wengier)
• Improved detection for the Chinese/Japanese/Korean
  keyboard layouts on Windows platform. (Wengier)
• Improved Windows installer for selecting languages
  for the DOS emulator. (Wengier)
• Improved config option "file access tries" for the
  Linux and macOS platforms. (Wengier)
• Fixed SafeDisc 2 check for Red Alert 2 by renaming
  the IDE CD-ROM device. (rderooy & psyraven)
• Fixed problem when inputting characters with call
  INT21/AH=3Fh in PC-98 mode. (nanshiki)
• Fixed hang on zip-mounted drives and minor bug on
  the DOS file-read code. (tbr)
• Fixed file copying problem with Windows 9x install
  at the end of the DOS-based Setup. (Wengier)
• Fixed command like "IF NOT EXIST D:\NUL ..." not
  working if the drive does not exist. (Wengier)
• Fixed that pasting text from clipboard via mouse
  may not work properly in some cases. (Wengier)
• Fixed the mouse scrolling wheel not working with
  CTMOUSE 2.1's "CTMOUSE /O" in guest DOS. (Wengier)
• Fixed window transparency setting not working in
  macOS SDL1 build. (Wengier)
• Fixed macOS small display issue with the in-tree
  SDL2 library by applying SDL updates. (Wengier)
• Fixed menu option "Always on top" to work with the
  in-tree SDL2 library on macOS. (Wengier)
• Fixed the terminal mess-up issue with -display2
  option on Linux and macOS platforms. (Wengier)
• Fixed OpenGL output options not working in Windows
  ARM32/ARM64 builds. (Wengier)

DOSBox-X 2022.08.0 (0.84.2) 2022-08-01 13:28

Note: Installation instructions are available from the INSTALL page. Also, always check out the DOSBox-X homepage for latest updates.

For usage information please look at the DOSBox-X user guide, which is available from the DOSBox-X Wiki.

2022.08.0 (0.84.2)

• Fill in PC-98 BIOS data area byte value indicating
  CPU type (whether 8086, 286, 386 or higher)
  (Wengier), fill it in at startup (joncampbell123).
• CHOICE now supports breaking and errors on end of
  file or pipe instead of freezing DOSBox-X. (Jookia)
• Fixed debugger commands parsing numbers wrong. (Jookia)
• Fixed DIR crashing on volumes with more than
  999,999,999,999 bytes of free space. (Jookia)
• Switched to year.month.patch versioning (Jookia)
• Fix NE2000 panicking if packets are queued too fast.
  (kcgen, Jookia)
• Fix ISO image format detection to support pure
  UDF formatted images, meaning that the image
  lacks any ISO 9660 features and contains only
  UDF. (joncampbell123).
• Added support for UDF filesystem to ISO image
  handling. It is enabled by default if emulating
  MS-DOS 7.10 (aka Windows 98) or higher.
  (joncampbell123).
• Added code to detect Rock Ridge according to the
  System Use Sharing Protocol standard, and to
  read the SUSP entries correctly for the alternate
  name, if enabled. (joncampbell123)
• Updated ISO MSCDEX drive emulation to scan the
  available volumes in the ISO image rather than
  assume the first volume, which makes Joilet
  support possible if long filenames are enabled
  and the DOS version is 7.0 or higher. (joncampbell123).
• Add IMGMOUNT -o option for ISO filesystem support
  to enable/disable Joliet extensions, which is a
  Microsoft extension to ISO 9660 where long names
  encoded using Unicode UCS-16 exist as a supplementary
  volume in the ISO image and are used by Windows 95
  and higher to support long filenames on CD-ROM.
  Added support for reading the Joliet volume and
  providing them for both the 8.3 and long filename
  APIs in DOS. (joncampbell123).
• Add IMGMOUNT -o option for ISO filesystem support
  to enable/disable Rock Ridge long filename support.
  The option is -o rr=1 to enable and -o rr=0 to
  disable. (joncampbell123).
• Fixed 8.3 name generations on ISO drives with Rock
  Ridge extension. The ISO drives can be refreshed
  via RESCAN command like other drives. (Wengier)
• SDL_Net support is available for HX-DOS builds,
  similar to other builds. Packet driver is needed
  for network capability in DOS. (Wengier)
• Fixed line endings when copying to shared clipboard
  (e.g. CLIP$) in non-Windows platforms. (Wengier)
• Fixed problems with SDL1 Windows builds in which
  the user had to type the Fullscreen mapper shortcut
  twice. It seems a SDL1 library function that is
  used to indicate ignoring or adding a class of
  events also liked to flush the event queue. This
  is called on mode change. This caused lost
  keystrokes, leaving the mapper the impression that
  those keys were still held down. (joncampbell123).
• Fixed PC-98 mode MS-DOS 7/Windows 9x boot disk's
  80386 CPU check. (Wengier)
• Added support for auto-converting non-image drives
  (such as mounted local drives) to disk images, so
  that they will be visible when booting into guest
  systems. A config option "convertdrivefat" (in
  [dosbox] section) is added to toggle this setting,
  or you can toggle via BOOT command's -convertfat
  (or -convertfatro option for read-only access) and
  -noconvertfat options. There're also config options
  "convert fat free space" (in [dosbox] section) and
  "drive z convert fat" (in [dos] section) to control
  free space (in MB; 0 means read-only) and whether
  to also convert virtual drive Z:. Much of the code
  is imported from DOSBox Pure, with added support
  for PC-98 HDI and code page conversions. (Wengier)
• Added menu option "Save to disk image" (under drive
  letter in "Drive" menu) to save a mounted non-FAT
  drive to selected disk image (IMG/HDI). (Wengier)
• Added the "Limit disk transfer speed" menu group
  (under "DOS") to toggle the hard & floppy disk data
  rate function. Also moved "Quick launch program..."
  menu from "DOS" menu to "Main" menu. (Wengier)
• Added code pages 856 (Hebrew) and 859 (Latin 9) for
  the guest-to-host code page conversions. (Wengier)
• Added config option to allow create of temporary
  devices for piping operations when a temporary DOS
  path is not available. (Wengier)
• Added support for ATAPI raw sector reading with
  READ CD command. (schellingb)
• Report bad sectors recorded in raw CD images as
  ATAPI read errors. (schellingb)
• You can use CONFIG -set langcp=... to change the
  current language along with the embedded code page,
  or CHCP nnn:... to specify a language file as well,
  e.g. "CHCP 932:" or "CHCP 932:ja_JP" for Japanese
  code page and language file. Also improved -langcp
  option for SBCS code pages, and Windows installer
  will additionally set keyboard layouts for the
  selected languages. (Wengier)
• Changed menu option "Restart DOSBox-X with language
  file..." to "Load language file..." for loading
  language files without rebooting DOSBox-X, unless
  a guest system is currently running. (Wengier)
• Imported the more recent MBR code from FreeDOS to
  avoid the "boot menu" as in older code. (Wengier)
• When changing TTF font, DOSBox-X will try to show
  the number of missing characters in the new TTF
  font (if any). (Wengier)
• Fixed color becoming darker after changing TTF font
  multiples times in TTF output. (Wengier)
• Fixed display of individual/total file sizes with
  DIR command when they are very large. (Wengier)
• Fixed non-US code page conversions for mounted FAT
  drives. (Wengier)
• Fixed incorrect message displays in Configuration
  Tool and Mapper Editor when booting into guest
  systems with language files. (Wengier)
• Fixed possible "Path not found" bug when switching
  to code page 950 from another code page. (Wengier)
• Fixed creating directories may not work properly
  for overlay drives on Windows systems. (Wengier)
• Fixed -set and -get options of CONFIG command when
  there are spaces in property names, without having
  to prepend the section names. For example, command
  CONFIG -get "synchronize time" is supported just
  as CONFIG -get "dosbox synchronize time". Similar
  for -SET option when launching DOSBox-X. (Wengier)