Admin Tools | Bochs 2.4.2

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.

New in this version:
•CPU and internal debugger
- VMX: Implemented TPR shadow VMEXIT
- Bugfixes for CPU emulation correctness (mostly for VMX support).
- Bugfixes and updates for Bochs internal debugger
- On SMP system stepN command now affects only current processor
•Memory
- Bugfixes for > 32-bit physical address space.
- Allow to emulate more physical memory than host actually could or would
like to allocate. For more details look for new .bochsrc 'memory' option.
•Cleanup configure options
- All paging related options now will be automatically determined according
to --enable-cpu-level option. Related configure options
--enable-global-pages, --enable-large-pages,
--enable-pae, --enable-mtrr
are deprecated now. Only 1G paging option still remaining unchanged.
- Deprecate --enable-daz configure option. Denormals-are-zeros MXCSR control
will be enabled automatically iff SSE2 is supported (like in hardware).
- Deprecate --enable-vme configure option, now it will be supported iff
CPU_LEVEL >= 5 (like in hardware).
•I/O Devices
- Bugfixes for 8254 PIT, VGA, Cirrus-Logic SVGA, USB UCHI
•SF patches applied
[2817840] Make old_callback static by Mark Marshall
[2874004] fix for VMWRITE instruction by Roberto Paleari
[2873999] fix CS segment type during fast syscall invocation by Roberto Paleari
[2864389] Debugger gui maximize on startup by Thomas Nilsen
[2817868] Rework loops in the memory code by Mark Marshall
[2812948] PIT bug by Derek
•these S.F. bugs were closed/fixed
[2833504] GUI debugger bug-about GDT display
[2872244] BIOS writes not allowed value to MTRR MSR causing #GP
[2885383] SDL GUI memory leak
[2872290] compilation in AIX5.3 ML10 failes
[2867904] crash with cirrus bx_vga_c::mem_write
[2851495] BIOS PCI returns with INT flag = 0
[2860333] vista 64 guest STOP 109 (GDT modification)
[2849745] disassembler bug for 3DNow and SSE opcodes
[1066748] Wrong registers values after #RESET, #INIT
[2836893] Regression: Windows XP installer unable to format harddrive
[2812239] VMX: VM-Exit: Incorrect instruction length on software int
[2814130] bx_debug lex/yacc files incorrectly generated
[2813199] MP Tables Missing From BIOS
[2824093] VMX exception bug
[2811909] VMX : CS Access-rights Type.Accessed stays 0
[2810571] Compile Errors on OSX
[2823749] GCC regression or VM_EXIT RDMSR/WRMSR bug
[2815929] Vista/XP64 unnecessary panic
[2803519] Wrong example in man page bochsrc
•these S.F. feature requests were closed/implemented
[422766] Large Memory configurations
[1311287] Idea for a better GUI
[455971] USB support
[615363] debugger shortcut for repeat last cmd

Download is source code and must be compiled before use.

Requirements:
OS X 10.3 or later
PPC Mac