70545ec25d
1. Some fixes to the S3 refresh rates using the bt48x ramdac as well as 32bpp acceleration (actually pixtrans reads) fixes, which are actually one single dword rather than two words. (This fixes some graphical bugs in 32bpp mode using OS/2 Warp with the Elsa 928 drivers). 2. Add undocumented ports 0x82ec and 0x82ed, needed by the Elsa OS/2 928/805i cards to operate correctly and not getting stuck at a blank screen. 3. Workaround a read select register issue when reading back the accelerated height (0xbee8 index 0x0f bits 3-0 returning a non-height index, in this case, 0x0e) so that the height is not zeroed on writes after the first reads, allowing text and fonts to be displayed on OS/2 Warp 3's built-in S3 864 drivers in every bpp. 4. Don't run the mach8/32 specific clock if we're in plain VGA text mode. 5. Some cleanups to the et4000w32 chip series, including a clock (refresh rate) fix for OS/2's built-in drivers and the extended crtc parameters to be run only on graphics modes.
86Box
86Box is a low level x86 emulator that runs older operating systems and software designed for IBM PC systems and compatibles from 1981 through fairly recent system designs based on the PCI bus.
Features
- Easy to use interface inspired by mainstream hypervisor software
- Low level emulation of 8086-based processors up to the Mendocino-era Celeron with focus on accuracy
- Great range of customizability of virtual machines
- Many available systems, such as the very first IBM PC 5150 from 1981, or the more obscure IBM PS/2 line of systems based on the Micro Channel Architecture
- Lots of supported peripherals including video adapters, sound cards, network adapters, hard disk controllers, and SCSI adapters
- MIDI output to Windows built-in MIDI support, FluidSynth, or emulated Roland synthesizers
- Supports running MS-DOS, older Windows versions, OS/2, many Linux distributions, or vintage systems such as BeOS or NEXTSTEP, and applications for these systems
Minimum system requirements and recommendations
- Intel Core 2 or AMD Athlon 64 processor or newer
- Windows version: Windows 7 Service Pack 1 or later
- Linux version: Ubuntu 16.04, Debian 9.0 or other distributions from 2016 onwards
- macOS version: macOS High Sierra 10.13 or newer
- 4 GB of RAM or higher
Performance may vary depending on host and guest configuration. Most emulation logic is executed in a single thread. Therefore, systems with greater IPC (instructions per clock) capacity should be able to emulate higher clock speeds.
For easier handling of multiple virtual machines, use a manager application:
- Avalonia 86 by notBald (Windows and Linux)
- 86Box Manager by Overdoze (Windows only)
- 86Box Manager X by xafero (Cross platform Port of 86Box Manager using Avalonia)
- sl86 by DDX (Command-line 86Box machine manager written in Python)
- Linbox-qt5 by Dungeonseeker (Linux focused, should work on Windows though untested)
- MacBox for 86Box by Moonif (MacOS only)
To use 86Box on its own, use the --vmpath/-P command line option.
Getting started
See our documentation for an overview of the emulator's features and user interface.
Community
We operate an IRC channel and a Discord server for discussing 86Box, its development, and anything related to retro computing. We look forward to hearing from you!
Contributions
We welcome all contributions to the project, as long as the contribution guidelines are followed.
Building
For instructions on how to build 86Box from source, see the build guide.
Licensing
86Box is released under the GNU General Public License, version 2 or later. For more information, see the COPYING file in the root of the repository.
The emulator can also optionally make use of munt, FluidSynth, Ghostscript and Discord Game SDK, which are distributed under their respective licenses.
Donations
We do not charge you for the emulator but donations are still welcome: https://paypal.me/86Box.
You can also support the project on Patreon: https://www.patreon.com/86box.