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Releases: joncampbell123/dosbox-x

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

02 Oct 06:21
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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

02 Jul 04:49
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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
    ...
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DOSBox-X 2024.03.01 2024-03-01 14:58

01 Mar 22:59
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  • 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...
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DOSBox-X 2023.10.06 2023-10-06 23:24

07 Oct 06:26
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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

02 Sep 00:03
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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

01 May 17:45
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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

01 Apr 08:05
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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...
Read more

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

27 Dec 04:03
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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

01 Sep 23:26
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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

01 Aug 20:30
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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)