DOSBox is een opensourceprogramma waarmee een DOS-omgeving kan worden geëmuleerd, waardoor het mogelijk is om oude software en spellen te draaien die niet of niet goed meer werken op moderne computers. De laatste versie van DOSBox is echter alweer meer dan zes jaar geleden verschenen. DOSBox-X is ontstaan als een fork en biedt naar eigen zeggen meer flexibiliteit en functionaliteit. Downloads zijn beschikbaar voor Windows, Linux en macOS. De changelog voor versie 2026.03.29 kan hieronder worden gevonden.
DOSBox-X 2026.03.29
- Add dosbox.conf option to control the duration of the beep when DOS CON and INT 10h are given the BEL character.
- DOS CON device BEL (beep) handling: For IBM PC modes, call on INT 10h to make the beep, rather than duplicate code. Fix the DOS CON device so that it can also properly beep in PC-98 mode.
- Fix bug where the "zero memory on DOS allocation" option was stuck on. Some games, like "Bad Cat" rely on memory contents peristing across DOS EXEC and memory allocation.
- Fix Hercules palette selection related to herc blend.
- DOS kernel: When executing an EXE file, the loader can now detect EXE files that were compressed using EXEPACK. Based on the new exepack dosbox.conf setting, it can decompress the EXE by itself, switch off the A20 gate, or do nothing. The purpose of this setting is to avoid EXEPACK "Packed File is Corrupt" errors that happen if the A20 gate is enabled and the EXE was loaded too low in memory.
- Linux SDL1: Use XDG_SESSION_TYPE environment variable to detect whether or not the user is running DOSBox-X under X11 or Wayland, and if so, prevent the fbcon and svga drivers from initializing. There seems to be a problem where, if run under Wayland and the XWayland compatibility layer if not present, SDL1 uses the fbcon driver to take over the screen using vtcon switching and the classic fbdev driver interface. Don't do that!
- INT 21h AH=4Ah resize memory: If memory resize fails because there is not enough room for the requested amount of memory, do not set ownership of the block to the program. This fixes memory allocation error in California Games II. The game at one point seems to miscalculate and ask for an excessively large amount of memory on resize, and then fail, which doesn't seem to affect the game. HOWEVER, prior to the bugfix, the memory block that was available was assigned ownership to the game anyway. Later on after helicopter takeoff, the game would attempt to allocate more memory, which would fail because of the erroneous assignment of ownership to free memory.
- Add debug logging to not only indicate DOS kernel memory alloc, free, and resize, but also log when the memory operation fails. Perhaps someday I'll figure out what the memory management in California Games II is doing wrong that makes the helicopter part fail in DOSBox-X.
- Code development now occurs across two primary branches: master for fully functional emulation, and main-osfree for versions of DOSBox-X where built-in MS-DOS OS emulation is disabled. The osfree branch can only boot a guest OS. main-osfree is for use in jurisdictions that enforce or wish to enforce OS level age verification, and therefore, may consider the MS-DOS emulation an OS that is subject to those laws.
- El Torito CD-ROM floppy disk boot emulation is no longer as slow as an actual floppy drive. Your bootable CDs will boot much faster now.
- DOSBox-X shell: If a DOS error happened while trying to execute a DOS program, read the error code and print an appropriate message on the console. So far only "Access Denied" has any specific error message there.
- Skip all keyboard code page and layout loading if running in PC-98 mode. PC-98 systems store the entire font in ROM with only very limited room for custom fonts, therefore, it makes no sense to load code pages in PC-98 mode.
- Keyboard code page layout: Fix bug where an out of range start_pos can cause DOSBox-X to segfault. Range check and print an error message instead.
- Keyboard code page layout: The UPX unpacker checks the stack pointer (like a COM program would) to determine if there is enough memory to decompress. If there is not, it executes INT 20h to exit to DOS. Problem is, the code page execution never makes a proper PSP segment for that to work, so, during execution, intercept INT 20h and safely redirect execution to exit properly when called. Set an error flag so the code can know if that happened and say so.
- Keyboard code page layout: If executing the CPI/CPX file because UPX decompression is detected, allocate memory based on the size of the file plus reasonable stack space rather than assume about 128KB of RAM following a DOS allocation of less, which for lower memsizes, only causes a crash on startup.
- Debug print to log what code page file is being loaded at startup
- CPU Idle callback is now strictly limited to processing IRQs and one CPU instruction, instead of however many CPU instructions can run until the next scheduled emulator event. This fixes a bug where system calls that use the Idle callback (INT 21h, etc) can sometimes vary their delay time by emulator events, and if "scanline render on demand is enabled", can cause the Idle call to take a full 1ms interval of time. This fixes an issue where "scanline render on demand" caused some DOS games like Xargon to take 5 to 10 times longer to transition between title, main menu, gameplay, etc.
- Debugger LOGL command now includes the PIC_FullIndex() emulator time in millseconds so that it can be used to determine time as well as CPU state for debugging
- Add dosbox.conf option to control whether VBE emulation provides the protected mode interface or not
- Add dosbox.conf option vbememsize and vbememsizekb to control how much video memory is reported through the VESA BIOS, which can be less than actual video memory (but must be at least 256KB). This option can help with some DOS programs that have problems with "too much" video memory in the system
- Add INT 10h mode flag _REQUIRE_LFB. When set, INT 10h calls to set VESA BIOS modes will fail unless requesting to set the linear framebuffer version of the mode
- S3 emulation will mark any more large enough to exceed bank switching limits in S3 hardware as _REQUIRE_LFB
- I'm not sure why Adlib emulation defaults to 48KHz in most versions of DOSBox, but the hardware rate is 49716 and that should be the default
- Fixed crash on starting debugger on MinGW builds
- Adjusted the ChinaSea/Big5-2003 extended code point ranges for CP951 to 0x9140–0xA3FE and 0xC6A1–0xFEFE
- Replaced deprecated symbols to enable launching on old macOSs
- Converted all bash-dependent shell files to POSIX-shell compliant
- Removed 7 duplicate Chinese character mappings from CP951
- Added SoundBlaster microphone input support (Windows WASAPI)
- Fixed segfault on launch of macOS builds
- Added OS/2 support for tinyfiledialogs, browser and external programs and some more fixes.
- Fixed savestate load "Memory size mismatch" error on MSVC build
- Fixed savestate loading crash related to dynamically allocated TempLine in VGA system
- Added Direct3D11 and Metal support (Experimental, SDL2 only)
- When leaving fullscreen, only force rebuilding the window for OpenGL mode.
- Clear modifier keys before savestate gets saved.
- Re-enabled WinMM joystick support (Windows SDL1)
- Fixed colors option fails at launch on TTF mode
- Optional switch to disable post exit delay in DX-CAPTURE
- Fixed Emscripten builds for Dosbox x v2026.01.02
- Fixed long freeze during startup on linux
- Fixed windowposition option at launch
- Fixed detection of EXEPACK failures
- Added OS/2 dimension handling to UpdateWindowDimensions
- Fixed handling of volume label searches
- Microphone input: Make Hands-Free profile (HFP) optional
- macOS: Fixed build script typo that made loading freetype library fail
- Fixed FPU FILD emulation
- Removed range check in INT10_GetCursorPos causing text glitches
- Added experimental VS2026 CI builds. Can be downloaded as 64-bit Visual Studio nightly builds.
- macOS: Fixed garbled message when opening image file(s) from dropdown menu.
- Fixed XCOPY argument parsing to correctly handle switches appended directly to file paths without whitespace.
- Fixed some Yes/No character was remained hardcoded as Y/N for some languages specifiying other characters (e.g. German).
:fill(white):strip_exif()/i/2006150710.jpeg?f=thumbmedium)
:strip_icc():strip_exif()/u/11631/tentacle.jpg?f=community){kind=small}
/u/748079/crop65b35799c7d62.png?f=community){kind=small}
:strip_exif()/u/115520/crop5def67c595741_cropped.gif?f=community){kind=small}