Latest release: Bochs 2.2.6

Version 2.2.6 is an intermediate (bugfix+) release. It includes a lot of bugfixes and a few new features.
Here is the list of changes since version 2.2.5:

• first major SMP release !
  • several APIC and I/O APIC fixes make SMP Bochs booting Windows NT4.0 or Knoppix 4.0.2 without noapic kernel option in SMP configuration
  • critical APIC timer bug fixed
  • obsolete SMP BIOS images removed (MP tables created dynamicaly)
  • determine number of processors in SMP configuration through .bochsrc
    • new .bochsrc option 'CPU' allows to choose number of processors to emulate
    • new configure option --enable-smp to configure Bochs for SMP support,
    • the old --enable-processors=N option is deprecated
• CPU and internal debugger fixes
  • enabled #PCE bit in CR4 register, previosly setting of this bit generated #GP(0) fault
  • enabled LAHF/SAHF instructions in x86-64 mode
  • fixed bug in PMULUDQ SSE2 instruction
  • fixes in Bochs debugger
• configure and compile
  • enable VME (virtual 8086 mode extensions) by default if cpu-level >= 5
  • enable Bochs disassembler by default for all configurations
  • win32 installer script improvements
  • ips parameter moved to new 'CPU' option
  • show IPS value in status bar if BX_SHOW_IPS is enabled
• Other
  • several fixes in the hard drive, keyboard, timer, usb and vga code
  • new user button shortcut "bksl" (backslash)
  • updated Bochs instrumentation examples
  • user and development documentation improved

The binary packages for Linux and Windows are built with these featues :

• Pentium III emulation with all optimizations enabled
• devices: NE2000, SB16, PCI and USB
• video: Bochs VBE and Cirrus SVGA
• Linux display libraries: nogui, rfb, sdl, term, x
• Windows display libraries: nogui, rfb, win32

Note that some configuration file options are deprecated now and some other options have been modified or improved. See the sample config file and the user documentation for more information.

Details on what has changed since version 2.2.5


Previous release: Bochs 2.2.5

Version 2.2.5 is an intermediate (bugfix+) release. It includes lots of bugfixes and a few new features.
Here is a list of the most important changes :

• added virtual 8086 mode extensions (VME) implementation
• several fixes/improvements in x86-64 emulation, debugger and disassembler
• new serial mode 'socket' connects a network socket
• IDE busmaster DMA feature for harddisks and cdroms completed and enabled
• many improvements in Bochs emulated I/O devices (e.g. floppy, cdrom)
• Updated LGPL'd VGABIOS to version 0.5d

Details on what has changed since version 2.2.1


Bochs Binary and Source Releases

The latest release of Bochs is available in these file formats :

• Win32 binary NSIS installer package (EXE)
• SMP binary for win32 (ZIP) - Bochs installation is required
• Linux binary RPM
• Platform independant source package (TAR.GZ)
• Win32 specific source package prepared for MSVC (ZIP)
• Linux source RPM

You can download any release since March 2001 on the Releases Page.


Download CVS Snapshot

CVS Snapshot: Bochs, like many other open source projects, uses CVS (Concurrent Version System) to keep track of source code. Unlike the current release, the CVS version of the sources contains everything the developers have written to this date, and it can change daily (or even hourly). As a result, the CVS version of Bochs will have more features and bug fixes than the release, but also it may be somewhat less stable. You can decide if you prefer to go exploring and try out our newest code, or stick with the better-tested release. Since the CVS sources are always in motion, we take a snapshot each night at some late hour after most developers should be in bed.

The CVS snapshots are provided as a convenience only. Of course, you could also get the same information using CVS itself. Some of the benefits of using CVS directly are: you can get any release or version, view the log messages that say what files were changed, and make patches very easily with "cvs diff -u". Last Modified on .