Cross-platform DOS emulation package
Complete, accurate emulation and more

DOSBox-X 0.84.2 (2022.08.0) Release Notes

Release Date: August 1, 2022

Please report any issues in our issue tracker.

Also, make sure to check out our Wiki guide.

New in This Version

  • 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)
Previous release: 0.84.1 (release notes) Next release: 0.84.3 (release notes)