Bochs v2.8

Bochs v2.8 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 v2.8 Changelog:
- Bugfixes for CPU emulation correctness (MONITOR/MWAIT, VMX/SVM, x87, AVX-VNNI, AVX-512, CET)
- Critical CPU emulation bugfixes for SHA and GFNI instructions, ADOX and XRSTOR/XRSTORS instructions (prevented boot of Win10)
! SVM: Implemented SVM VM_CR_MSR and INIT redirect (required for booting SMP with SVM)
! Implemented VMX MBE (Mode Based Execution Control) emulation required for Windows 11 guest
! Implemented VMX 'Shadow Stack Prematurely Busy' control
! Implemented MSR IA32_SPEC_CTRL Virtualization VMX extension
! Implemented Posted-Interrupt Processing VMX extension emulation
! Implemented Linear Address Separation (LASS) extension
! Implemented 57-bit Linear Address and 5-Level Paging support
! Implemented User-Level Interrupt (UINTR) extension
! Implemented Intel AMX extensions (AMX, AMX_INT8, AMX_BF16, AMX_FP16, AMX_COMPLEX)
! Implemented Intel instruction sets:
- MOVDIRI/MOVDIR64B, AVX512 BF16, AVX IFMA52, VNNI-INT8/VNNI-INT16, AVX-NE-CONVERT, CMPCCXADD, SM3/SM4, SHA512, WRMSRNS, MSRLIST, WAITPKG, SERIALIZE
! CPUID: Added Xeon Sapphire Rapids CPU definition
- Improved 64-bit guest support in Bochs internal debugger, added new internal debugger commands
- Bochs debugger enhanced with new commands (setpmem, loadmem, deref, ...)
Enhanced magic breakpoint capabilities. Refer to user documentation for more details.
- Updated Bochs instrumentation examples for new disassembler introduced in Bochs 2.7 release
- USB: Fixed/added USB 2.0 Compliance to all devices. Hub still needs a few additions
- USB: xHCI: added the ability to have more than one model of xHCI hardware. Currently there are two.
- USB: Added experimental MSD UASP emulation
- USB: Added OHCI as an EHCI Companion option. Now allows UHCI or OHCI specified as a configuration parameter.
- Disk images: Allows large VHD image files
- Fixed and enhanced the Floppy Disk emulation, VGA emulation fixes
- Expand maximum resolution for Banshee and Voodoo 3 from 1600x1280 to 1920x1440
- LGPL'd VGABIOS updated to version 0.9a (several VBE fixes / additions)
- Documentation updates and fixes

Download: Bochs v2.8
Source: Here