Bochs v2.6.5 is released. Bochs is a highly portable open source IA-32 (x86) PC emulator written in C++, that runs on most popular platforms. It includes emulation of the Intel x86 CPU, common I/O devices, and a custom BIOS. Currently, Bochs can be compiled to emulate a 386, 486, Pentium/PentiumII/PentiumIII/Pentium4 or x86-64 CPU including optional MMX, SSEx and 3DNow! instructions.

Bochs is capable of running most Operating Systems inside the emulation including Linux, DOS, Windows® 95/98 and Windows® NT/2000/XP or Windows Vista. Bochs was written by Kevin Lawton and is currently maintained by this project.

Bochs can be compiled and used in a variety of modes, some which are still in development. The 'typical' use of bochs is to provide complete x86 PC emulation, including the x86 processor, hardware devices, and memory. This allows you to run OS's and software within the emulator on your workstation, much like you have a machine inside of a machine. For instance, let's say your workstation is a Unix/X11 workstation, but you want to run Win'95 applications. Bochs will allow you to run Win 95 and associated software on your Unix/X11 workstation, displaying a window on your workstation, simulating a monitor on a PC.

Bochs v2.6.5 Changelog:

Brief summary : - CPU: extra 5-10% emulation speedup with new trace linking optimization - CPU: implemented new instructions (e.g. AVX-512, SHA, XSAVEC) - CPUDB: added 2 new CPU models - Bugfixes for CPU emulation correctness (including some critical ones) - Gui debugger output window now can be used as a log viewer - Added built-in slirp (user-mode networking) support (ported from Qemu) - Added global sound config option and volume control support to the devices - Added new experimental gui 'vncsrv" using the LibVNCServer library - Rewrite of the bximage utility in C++ for image creation, conversion and resize Detailed change log : - CPU - Bugfixes for CPU emulation correctness (critical fixes for XSAVE, VMX, TBM/BMI and RDRAND instructions) - Implemented FCS/FDS Deprecation CPU feature - Implemented SHA instructions emulation - Implemented XSAVEC instruction emulation and XINUSE optimization in the XSAVEOPT instruction - Implemented AVX-512 instructions emulation (experimental) ! CPUDB: Added Intel(R) Core(TM) i7-4770 CPU (Haswell) configuration to CPUDB ! CPUDB: Added AMD A8-5600K APU (Trinity) configuration to CPUDB - Replace 'SSE' and 'AVX' .bochsrc option with single 'SIMD' option which controls presence of all CPU SIMD extensions from SSE to AVX-512 - Extra 5-10% emulation speedup with new trace linking optimization. The optimization is enabled by default when configuring with --enable-all-optimizations option, to disable trace linking optimization configure with --disable-trace-linking. The optimization require to compile Bochs with at least -O2 optimization level on gcc. - Bochs Debugger and Instrumentation - Added disam for Bochs internal instruction representation, especially useful for instrumentation - Updated definition of instrumentation callbacks, see description in instrumentation.txt / Fixed instrumentation examples - added capability to use the gui debugger output window as a log viewer - General - Increased max. device log prefix size to 6 and added / modified prefixes - plugin version now uses the native DLL handling code for all Windows ports - critical bugfixes in save/restore functionality - Configure and compile - configure and compilation fixes for Cygwin and Visual Studio environment - configure option --enable-cdrom now only controls the presence of platform-specific code for device access - building plugin version with MSVC nmake now supported - Config interface - Added global sound control option for the driver and wave input/output - Added new bochsrc option to control the speaker output mode - Added support to specify the initial time for 'clock' option in ctime(3) string format - Added support for the LTDL_LIBRARY_PATH variable with MSVC plugins - All SB16 / ES1370 options are now changeable at runtime - textconfig: added menu item for saving configuration at runtime - Added bochsrc option for the Voodoo Graphics emulation (experimental) - I/O Devices - Hard drive / CD-ROM - seek latency implemented for ATA/ATAPI read commands - portable ISO image file access now available on all platforms - Networking - added built-in slirp (user-mode networking) support (ported from Qemu) - removed the "slirp backend" support (required external slirp binary) - slirp/vnet: all supported TFTP extension options implemented now - Sound - SB16 / ES1370: added volume control support for wave output - SB16: fixed audio distortion when playing stereo wave files - ES1370: added 'wavemode' support similar to the SB16 - soundwin: added capability to specify the ID of the MIDI device to use - Serial - Serial mouse detection fixes - Busmouse - Non-functional device rewritten to make it work in DOS and Win95 guests (use --enable-busmouse to configure and "mouse: type=bus" at runtime) - ROM BIOS - PS/2 mouse function: allow setting mouse packet size to 4 for wheel support - GUI and display libraries - Added new experimental gui 'vncsrv" using the LibVNCServer library - RFB: set maximum resolution to 1280x1024 (same as vncsrv) - RFB: don't wait for client connection on startup if timeout is set to 0 - Added mouse wheel support to the rfb, vncsrv and wx guis - wx: added viewer window for the Bochs log output - win32: fixes and improvements for the fullscreen mode - Tools - bximage utility rewritten in C++ for image creation, conversion, resize and redolog commit. Now vmware4 and vpc images can be created.

Download: Bochs v2.6.5
Source: Here