DOSBox-X Version 2026.06.02

DOSBox-X v2026.05.02 has been released, providing a robust emulator for running old MS-DOS games on modern operating systems. This update includes bug fixes and improvements, such as resolving savestate format incompatibilities, signedness issues in PMULLW, and FPU_Reg_80 size corrections. Notable enhancements include support for Nuked-CQM in OPL emulation, fixes for joystick startup crashes, and adjustments to fullscreen mode aspect ratios. Other improvements address ISO mounting dialogs, printer emulation issues, and various command processing fixes. The OSFREE version is prioritized for release on GitHub. Users can download the update for x64 systems.

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DOSBox-X v2026.05.02 has been released. DOSBox-x is a variant of DOSBox. DOSBox emulates an Intel x86 PC, complete with sound, graphics, mouse, joystick, modem, and other components essential for running many classic MS-DOS games that are incompatible with modern PCs and operating systems like Microsoft Windows XP, Windows Vista, Linux, and FreeBSD.

DOSBox-X Changelog:
Prepare for the release. This time, release OSFREE first to ensure the standard
version appears on GitHub first.
Resolved savestate format incompatibility between MSVC and MinGW builds.
(AleWin32)
Corrected PMULLW signedness issues. (bachimusprime)
Fixed FPU_Reg_80 size (cimarronm)
gui/sdl_mapper: Resolved startup crash with joysticks reporting >1 hat switch
(BoykoNeov)
Introduced Nuked-CQM support into OPL emulation. (maron2000)
macOS: Build OSFREE nightly releases (maron2000)
D3D11: Corrected aspect ratio and window size not being reflected after
returning from fullscreen mode (maron2000)
qcow2: Set logical (BIOS) CHS instead of physical (IDE) CHS when mounted
with drive numbers. (maron2000)
Debugger: fix F11 (trace into next instruction) collision being ignored
by Windows Terminal (AleWin32)
Display OSFREE in the title and help message to differentiate OSFREE builds.
(maron2000)
Resolved potential boot failure when booted from the “Boot from disk image” menu.
(maron2000)
Fixed dialog box not appearing when an ISO was mounted via the dropdown menu.
(maron2000)
printer.cpp: Corrected multiple printer emulation issues (maron2000)
Resolved handling of variable_length command
Corrected a typo in ESC S command
Skipped DBCS processing for bit graphic data
Fixed advancing cell position of DBCS characters
Resolved geometry detection of host folder converted drives (maron2000)