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EmuCR:Bochs Bochs v2.7 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 v2.7 Changelog:
Brief summary :
- 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)
Detailed change log :
- General
- Improved plugins handling: all available plugins in path are detected at
startup (including externally developed ones). These types are supported in
Bochs configuration: config interfaces, display libraries, VGA compatile
adapters, optional PCI/ISA devices, pluggable USB devices, disk image,
networking and sound driver modules.
- Save/Restore bugfixes
- Removed legacy "load32bitOShack" feature.
- Removed "svga" display library designed for the obsolete Linux SVGALib.
- Configure and compile
- Added example shortcut script for cross compiling on Linux for Windows.
- Visual Studio workspace files upgraded to VS2019 format.
- Config interface
- The config interfaces 'textconfig' and 'win32config' are now plugins.
- Switch config interface to 'textconfig' at runtime in case the gui doesn't
support dialogs (rfb and vncsrv on Windows).
- Bugfixes for CPU emulation correctness (CPUID/VMX/SVM fixes to support Windows Hyper-V as guest in Bochs)
! CPUID: Added TigerLake CPU definition (features CET and CLWB support)
- Memory
- Improved BIOS write support by implementing Intel(tm) flash chip emulation.
- Bochs Debugger and Instrumentation
- Switching to new internal instruction disassembler implementation based on Bochs internal instruction decoder.
New disassembler supporting natively all instruction extensions that Bochs is able to emulate, including AVX512*.
Old disassembler module is outdate and was removed from the source tree.
- Add more symbol lookups to disasm methods
- I/O Devices
- Networking
- Added "multiple NICs" support to the NE2000 and E1000 devices. Up to 4 devices
per model are supported. Use the zero-based "card" parameter to specify device.
- Added experimental FTP service for networking modules 'vnet' and 'socket'.
- Fixes for iPXE network boot support (modules 'slirp', 'socket', 'vnet').
- Added config file support for the 'vnet' module (similar to 'slirp').
- Added log file support to 'bxhub' utility (networking module 'socket').
- Packet logging in text format for the 'slirp' and 'vnet' modules controlled
by runtime option ("pktlog" option in config).
- Voodoo (all models): Now using CLUT for gamma correction in 16 bpp modes.
- Voodoo2: Added most of the bitblt capabilities.
- Voodoo Banshee: Added "Polygon Fill" command and 2D colorkey support.
- Removed lfb_enabled switch from Bochs VBE code. Now banked and LFB writes
to VRAM are always valid. Fixes GRUB bootloader menu when using Bochs VBE.
- DDC: Added "ddc" parameter to the "vga" option to make it possible
either to disable the DDC feature or to read the monitor EDID from file.
- PCI (general)
- Added config parameter to set up advanced PCI options. Now it is possible
to disable ACPI or HPET in case the i440FX chipset is selected. For the
i440BX chipset it is possible to disable the incomplete AGP subsystem.
- Added keyboard emulation with most of the keys supported.
- Added support for USB packet logging in PCAP format.
- Changed handling of device options in the USB port configuration
(see bochsrc sample).
- Sound
- Added PC speaker volume control for the lowlevel sound support.
- GUI and display libraries
- Added support for calling a headerbar handler after pressing F7 (enabled
with "cmdmode" option / present in sdl, sdl2, win32 and x).
- Added support for saving text mode snapshot in BMP format.
- Write marker to log file by pressing "m" button (guis with "cmdmode" on).
- X11 keymaps: added new one for Swiss-German and improved Italian map.
- RFB / vncsrv: VGA features h/v pel panning and split screen now supported.
- RFB: added support for the pixel format RGB332.
- added display library option for disabling the Bochs gui console to use
the default system console instead (rfb, sdl, sdl2, vncsrv, x).
- win32: added display library option "autoscale" to scale a small
simulation window by factor 2, 4 or 8 depending in desktop window size.
- wx: fixed status bar handling to avoid segfaults and deadlocks.
- LGPL'd VGABIOS updated to version 0.8a.
- Added initial version of the VGABIOS for Voodoo Banshee adapters.
- Added 'write character' support for non-VGA 8-bpp modes (Bochs VBE /
Cirrus / Banshee). Cirrus code uses bitblt engine.
- Fixed text output and scrolling in VGA graphics modes.
- Some small fixes in the VBE code and several code optimizations.
- Misc
- Added support for converting VDI images to another format with bximage.

Download: Bochs v2.7
Source: Here

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