DOSBox-X 0.84.0 2022-05-31 20:25

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.

0.84.0

• CMOS century register now aliased to register
  32h and 37h to appease Windows 2000, which assumes
  the century is stored there and will complain
  about invalid date/time otherwise (joncampbell123).
• Treat IDE command E7h (FLUSH CACHE) as a no-op
  so that the common use of it from Windows 2000
  doesn't spam your log file (joncampbell123).
• BIOS: At post, if DOS kernel was active and the
  DOS Shell was still running, initiate a proper
  system reset event. Some software, including the
  WINNT.EXE install program for Windows NT, like to
  restart the system by JMPing to the BIOS POST
  entry point. Prior to this fix, doing that from a
  DOS program caused instability with mounted images
  and the DOS shell due to recursion. (joncampbell123).
• Fix FPU implementation for aarch64 cores (cimarronm)
• Fixed INT 10h and DAC palette mapping to resolve
  incorrect colors with Hercules graphics mode when
  a game calls INT 10h to set video mode after setting
  it up. This resolves the incorrect blue on black
  color map for Grand Prix by Accolade (joncampbell123).
• Add recursive mkdir_p() directory creation so that
  overlay filesystem support can correctly create
  a subdirectory of any depth, instead of only one
  level deep from an existing directory on disk.
  (joncampbell123)
• Add dosbox(-x).conf option "isapnpport" to control
  whether the ISA Plug & Play I/O port is presented
  to the guest. Setting is "true", "false", or "auto".
  "auto" means to enable if PnP BIOS is enabled.
  Previously this port was always present even if
  the PnP BIOS was not. Some operating systems,
  including Windows NT/2000/XP, will enumerate ISA
  Plug & Play hardware by themselves whether or not
  the PnP BIOS is present. (joncampbell123)
• Fix FPU operations using the top of stack on
  32-bit VS builds (cimarronm)
• Add IDE ATAPI command MECHANISM STATUS for
  Windows NT 4.0 because that system seems
  to want to know if your CD-ROM drive is a
  CD changer (joncampbell123)
• IDE Plug & Play resource descriptor changed to use
  2-byte structure for listing IRQ resource instead of
  3 bytes. This (for some reason) fixes problems with
  the IDE driver in Windows NT 4.0, Windows 2000, and
  Windows XP and allows them to boot properly.
  (joncampbell123)
• INT 13h extensions function 48h is supposed to
  return physical geometry, not the logical geometry
  normally returned by function 08h. This means for
  IDE devices, to return the geometry the IDE controller
  is using. (joncampbell123)
• Enhanced the Mapper Editor interface. The Mapper UI
  has been greatly improved. (aybe)
• Add IDE ATAPI command MECHANISM STATUS for Windows
  NT 4.0 because that system seems to want to know if
  your CD-ROM drive is a CD changer. (joncampbell123)
• Fix IDE devices to start up with the drive ready
  bit set for OSes that expect it when probing IDE
  devices. This allows the Linux kernel to see IDE
  ATA drives emulated by DOSBox-X. (joncampbell123)
• Fix IDE ATAPI emulation to correctly handle CD
  READ across one or more DRQ block transfers. Use
  block size given by guest in consideration of DRQ
  block size, which allows ATAPI CD-ROM emulation to
  work properly with the Linux kernel. (joncampbell123)
• Add debug command to show PC-98 color palettes.
  Corrected typo. (joncampbell123)
• Add support for PC-98 monochrome graphics mode.
  (joncampbell123)
• IDE emulation now handles implementation events per
  IDE device instead of per IDE controller, which
  may resolve IDE controller issues with some guests.
  (joncampbell123)
• Added PC-98 GDC drawing commands, which is
  based on Neko Project II source code (nanshiki)
• Added PC-98 LIO BIOS interface, which is based on
  Neko Project II source code (nanshiki)
• INT 21h AH=31h Terminate And Stay Resident: If the
  program called INT 21h to free its own PSP segment,
  reassign the block back to the program as allocated
  and then resize as expected. Needed for PC-98 game
  "Yu No" in which PLAY6.EXE, one of the resident
  drivers used for music, does just that. (joncampbell123)
• Add a hack to enable read access to port 0xa460 on PC-98 which
  returns Sound ID to detect the sound board available.
  Note that the current hack returns Sound ID of PC-9801-86 board
  regardless of the board selected to emulate. (maron2000)
• Adds WINCHECK to list of programs which should not
  return a valid installation check for WinOldAp
  (AX=1700h/int2fh) so it doesn't mistakenly believe
  Windows is running (cimarronm)
• Add minimal support for IDE SET FEATURES command EFh.
  (joncampbell123)
• Fix CMPXCHG8B to change only the ZF flag, instead of
  changing ZF with other flags in an undefined state
  afterwards. This fixes problems with the Windows 2000
  kernel booting up and cputype=pentium (though I am
  unable to get past the INACCESSIBLE_BOOT_DEVICE error).
  (joncampbell123)
• Updates XADD instruction to set appropriate flags
  (cimarronm)
• Updates to FPU to handle opcode size prefix (66h)
  on FSTENV/FLDENV/FSAVE/FRSTOR instructions (cimarronm)
• Update FLD constant FPU instructions to more
  accurately match FPU implementations (cimarronm)
• Fixed dynamic_dynrec being displayed as dynamic_x86
  in menu, and PREFETCH instruction breakage in the
  dynamic core. (Jookia)
• Fixed crash if no dynamic cores available (Jookia)
• Fixed TTF mode breaking a guest not running the
  DOS kernel. (Jookia)
• Fix DBCS table initialization on reset and
  restart (cimarronm)
• Fixed some guest systems may not work as expected
  in non-TTF outputs. (Wengier)
• Fixed IME input not working in MinGW builds, and
  FluidSynth in MinGW-lowend builds. (Wengier)
• Fixed resizable OpenGL Voodoo window not working
  properly on Windows in previous version. (Wengier)
• Fixed commands "CHOICE /N /C:123" and "MIXER /GUI"
  not working properly in previous version. (Wengier)
• Integrated commits from mainline (Allofich)
  • Disable leading directory validity check in
    DOS_FindDevice.