Bochs 3.0 released

Volker Ruppert — Sun, 16 Feb 2025 10:05:02 -0000

Brief summary :
- Include Bochs debugger support in all release binaries.
Bochs internal debugger and Bochs GUI debugger are compiled in by default and
there are no special Bochs binaries with internal debugger support anymore.
- Integrated softfloat3e library replacing older softfloat2a fpu-emulation code
- Bugfixes for CPU emulation correctness (critical bugfixes for VMX, WAITPKG, LASS,
XSAVEC/XSAVES, CPUID and SHA1 ISA implementation)
- Added emulation of missing AMD 3DNow! instructions
- Implemented AVX512_FP16 Intel instruction set based on softfloat3e library
(enabled in Xeon Sapphire Rapids CPU definition)
- Implemented MONITORLESS MWAIT instructions support
- Implemented initial support for AVX10_1 + AVX10_2 ISA extensions and AVX10
CPUID leaf 0x24 (AVX10_1 first to be enabled in Xeon Granite Rapids)
- Implemented AMX-TF32 and AMX-AVX512 ISA extensions
- Implemented RAO-INT ISA and MSR_IMM ISA extensions
- CPUID: Added new CPU definitions: for i386, i486DX4, AMD Athlon XP and Intel Core i5 Arrow Lake CPUs
- CPUID: Support for enabling/disabling of one or more CPU features from CPUID
configuration (see "add_features" and "exclude_features" in bochsrc sample and documentation)
! CPUID: Old bx_generic CPUID model is deprecated with all associated .bochsrc
CPUID configuration options, use pre-defined CPU models instead
- Several fixes and improvements for the Cirrus and Voodoo emulation
- USB: Added the USB Debugger support for xHCI and UHCI (Windows / GTK3)
- Added USB boot option (requires i440fx.bin BIOS)
- LGPL'd VGABIOS updated to version 0.9c (Cirrus / VBE fixes and extensions)
- Added i440fx.bin BIOS written by Ben Lunt (https://github.com/fysnet/i440fx)
- Documentation updates and fixes after transition to GIT

Bochs 2.8 released

Volker Ruppert — Sun, 10 Mar 2024 13:45:18 -0000

Brief summary of changes:

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.
USB: Added the USB Debugger support for xHCI and UHCI
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

Bochs 2.7 released

Volker Ruppert — Sun, 01 Aug 2021 08:39:18 -0000

Brief summary of changes:

Bugfixes for CPU emulation correctness (CPUID/VMX/SVM fixes to support
Windows Hyper-V as guest in Bochs)
Improvements for the plugin handling to simplify Bochs extensions
Added "multiple NICs" support to the NE2000 and E1000 devices
Added experimental FTP service for networking modules 'vnet' and 'socket'
Fixes and improvements for all supported Voodoo graphics adapters
Added USB keyboard emulation with most of the keys supported
GUI "cmdmode": create a headerbar event with key combo starting with F7
LGPL'd VGABIOS updated to version 0.8a (new VGABIOS for Voodoo Banshee)

First pre-release of Bochs 2.7 now available

Volker Ruppert — Sun, 13 Jun 2021 05:40:08 -0000

Brief summary of changes :

Improvements for the plugin handling to simplify Bochs extensions
Added "multiple NICs" support to the NE2000 and E1000 devices
Added experimental FTP service for networking modules 'vnet' and 'socket'
Fixes and improvements for all supported Voodoo graphics adapters
Added USB keyboard emulation with most of the keys supported
GUI "cmdmode": create a headerbar event with key combo starting with F7
LGPL'd VGABIOS updated to version 0.8a (new VGABIOS for Voodoo Banshee)

Bochs 2.6.11 released

Volker Ruppert — Sun, 05 Jan 2020 10:24:41 -0000

Bugfix release

Changes in 2.6.11 (January 5, 2020):

General
- Added 64-bit support to the NSIS installer script
- Several fixes in the build system based on Debian patches
CPU / CPUDB
- Bugfixes for CPU emulation correctness
- Many critical bugfixes for Protection Keys, AVX512*, VMX/SVM, SHA, GFNI emulation
- ! Implemented CET (Control Flow Enforcement Technology) emulation according to Intel SDM rev071
I/O Devices
- Added missing Cirrus SVGA bitblt feature "transparent color compare"
- Some fixes in HPET emulation (patch by Oleg)
- Fixed disk image lock mechanism in the USB MSD case
BIOS / VGABIOS
- LGPL'd VGABIOS updated to version 0.7b (Fixed VESA extension 'read EDID' for Bochs VBE and Cirrus)
- Updated SeaBIOS ROM image to current version 1.13.0
- Added SeaVGABIOS ROM image for the Cirrus adapter
- Bochs BIOS built to work with CPU level 5 again

Bochs 2.6.10 released

Volker Ruppert — Sun, 01 Dec 2019 09:52:43 -0000

Intermediate (bugfix+) release

Brief summary of changes:

CPU: Bugfixes for CPU emulation correctness (critical bugfixes for
PCID, ADCX/ADOX, MOVBE, AVX/AVX-512 and VMX emulation)
CPU: implemented AVX-512 VBMI2/VNNI/BITALG, VAES, VPCLMULQDQ / GFNI
instructions emulation
VMX: Implement EPT-Based Sub-Page Protection
CPUID: Added new CPU models Skylake-X, Cannonlake and Icelake-U
CPUID: Implemented side-channel attack prevention reporting and
corresponding MSR registers, enabled for Icelake-U
Added basic support for the i440BX PCI/AGP chipset.
Added basic Voodoo Banshee / Voodoo3 emulation support.
Added basic DDC support for the VGA-compatible adapters.
Implemented HPET emulation (ported from Qemu).

Bochs 2.6.9 released

Volker Ruppert — Sun, 09 Apr 2017 08:13:02 -0000

Intermediate (bugfix+) release

Brief summary of changes:

CPU: implemented new instructions and x86 architecture extensions.
Bugfixes for CPU emulation correctness.
Added Android host platform support.
Added USB EHCI device emulation support.
Added USB floppy (UFI/CBI) support.
Added ethernet module 'socket', designed to interconnect Bochs instances.
Show textconfig at runtime in the Bochs VGA window (gui console).

Bochs 2.6.8 released

Volker Ruppert — Sun, 03 May 2015 09:44:56 -0000

Intermediate (bugfix+) release

Brief summary of changes:

Bugfixes for CPU emulation correctness (critical bugfix for x86-64
emulation).
Memory type calculation support for Bochs debugger and instrumentation.
Added Pentium (P54C) and Broadwell ULT CPU models.
Full save/restore support for enhanced gui debugger settings.
Added Oracle(tm) VM VirtualBox image support (VDI version 1.1).
SB16: Ported OPL3 emulation from DOSBox.
Major rewrite of the lowlevel sound code (mixer thread, more detailed
configuration, WAV file output).
Bugfixes in the floppy, lowlevel cdrom, rombios, slirp and win32 gui code.

Bochs 2.6.7 released

Volker Ruppert — Sun, 02 Nov 2014 11:34:32 -0000

Intermediate (bugfix+) release

Brief summary of changes:

CPU: implemented AVX-512BW/AVX-512DQ/AVX-512VL extensions emulation.
CPU: implemented AVX512-IFMA532 instructions emulation.
CPU: implemented AVX512-VBMI instructions emulation.
Bugfixes for CPU emulation correctness
The VGA update timer and the status LED timer now always use the
realtime mode independent from the 'clock' option setting.
Added native SDL2 GUI support to Bochs. To enable configure with
--with-sdl2.
Write enhanced gui debugger settings to file on exit and restore on
initialization.
USB xHCI model now emulates a NEC/Renesas uPD720202 device
ROM BIOS: fixed int74_function() for 4-byte (wheel mouse) packets.
LGPL'd VGABIOS updated from CVS (fixed building VBE modes list)
Visual Studio workspace files updated to VS2013Ex format.

Bochs 2.6.6 released

Volker Ruppert — Sun, 15 Jun 2014 07:55:31 -0000

Bugfix release

List of changes:

CPU / CPUDB
- allow sandy bridge configuration even when AVX is not compiled in
Configure and compile
- fixed compilation error when 3dnow support is enabled
- speedup Visual Studio build by almost 20% by adding /Gr compiler option
Misc
- fixed minimizing win32 gui window and resolution change while minimized
- added compiled SeaBIOS 1.7.5 image into Bochs tree along with Bochs BIOS images
- documentation fixes and updates

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