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DOSBox-X Git (2026/06/05) is a compilation of DOSBox-X, an enhanced version of DOSBox that emulates an Intel x86 PC. This software allows users to run many old MS-DOS games that are incompatible with modern operating systems like Windows XP, Vista, Linux, and FreeBSD. Recent updates include the reversion of CMPXCHG8B due to issues it caused, along with adjustments for MMX instructions that affect FPU registers. These changes ensure better emulation of the MMX writes, which are crucial for accurate performance. Download is available for the latest version.
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DOSBox-X Git (2026/06/05) has been compiled. DOSBox-x is a variant of DOSBox. DOSBox emulates an Intel x86 PC, including sound, graphics, mouse, joystick, modem, etc., which are essential for running various classic MS-DOS games that cannot be executed on contemporary PCs and operating systems like Microsoft Windows XP, Windows Vista, Linux, and FreeBSD.
DOSBox-X Changelog:
* Removed CMPXCHG8B, it caused issues
* Intel notes that MMX instructions write to FPU registers and set the exponent field to all 1s
* Expanded MMX_reg to encompass FPU exponent field. Intel specifies that MMX writes set the exponent to 0xFFFF, making it straightforward for the emulation to achieve this
