Bochs is a portable x86 PC emulation software package that emulates enough of the x86 CPU, related AT hardware, and BIOS to run Windows, Linux, *BSD, Minix, and other OS's, all on your workstation.

Bochs is a highly portable open source IA-32 (x86) PC emulator written in C++, that runs on most popular platforms.

Bochs includes emulation of the Intel x86 CPU, a custom BIOS and common I/O devices. Currently, Bochs can be compiled to emulate a 386, 486, Pentium/PentiumII/PentiumIII/Pentium4 or x86-64 CPU including optional SSEx, MMX, and 3DNow! instructions.

Bochs is capable of running most Operating Systems inside the emulation including Linux, Windows 95, DOS, and Windows NT 4. 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 OSes 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 Win95 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.

What's New in This Release: [ read full changelog ]

CPU / CPUDB:
· Added Athlon64 (Venice) configuration to the CPUDB
· BMI: fixed EFLAGS after BMI instructions
· MSR: access to AMD extended MSR space was impossible due to a bug in RDMSR/WRMSR
· VMX: fixed VMFUNC instruction behavior to align with Intel SDM revision 041
· VMX: fixed Bochs PANIC when doing I/O access crossing VMX I/O permission bitmaps
· VMX: fixed VirtualBox VMX guest Guru Meditation
· FS.BASE got corrupted after saving/restoring unusable FS selector
· VMX: fixed VirtualBox failures with VMX+EPT enabled
· Better report of supported CPUID features when not using pre-defined

CPUID profile:
· Debugger / Instrumentation
· fixed typo
· closing SF bug [3461405] step all command fails in SMP mode
· instrumentation: added special indication for indirect call/jump
· Configure and compile
· fixed compilation err in instrumentation call (tasking.cc)
· fixed compilation err with x86 hw breakpoint enabled and CPU_LEVEL < 6
· fixed compilation issue under win32 --with-nogui
· added missing dependencies for cdrom_osx...