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Showing content from https://github.com/froggey/Mezzano below:

froggey/Mezzano: An operating system written in Common Lisp

Demo releases are available through GitHub.

These releases are designed to be run in VirtualBox, though QEMU is also supported. 2GB of RAM, a virtio-net NIC and an Intel HDA audio controller are recommended.

x86-64 images are published. AArch64 has been made to work on some hardware. But to set expectations: making Mezzano run on any given piece of hardware or emulator is still typically a project that requires the user to dig into the code.

See the MBuild repo: (https://github.com/froggey/MBuild)

For help & support or to follow development, join the #mezzano IRC channel on Libera Chat (irc.libera.chat)

• USB stack by fittestbits
• Improved overall file system support by fittestbits
• EXT2/3/4 support has been implemented by Bruno Cichon (ebrasca)
• GMA950 modesetting display driver
• Hardware accelerated 3D support via qemu's Virgl device
• Multicore/SMP support
• Improved atomic operations
• Async APIs: wait-for-objects, dispatch, and thread pools
• Networking improvements: Server support, DHCP, TCP retransmit
• Source locations are tracked for many kinds of definitions
• Weak hash tables and other weak objects
• Cleanup of object representation and unifcation of standard-object/structure-object
• Unboxed structure slots
• Short floats implemented using IEEE half floats
• Unboxed (unsigned-byte 64) arithmetic
• Stack overflows and memory faults are trapped and can be recovered from
• Support for building on Windows
• Major improvements to CLOS and MOP conformance
• Keymap picker
• More bug fixes, performance improvements and features

• FAT32 support has been implemented by Bruno Cichon (ebrasca).
• McCLIM has been ported by fittestbits.
• Quicklisp has been ported by Peter S. Housel.
• Improved introspection tools: DISASSEMBLE and ED have been implemented.
• Generational collection has been added to the garbage collector.
• New SSA-based compiler backend, supporting unboxed value representations.
• Gray streams support has been overhauled.

• Trentino, a media player, has been implemented by Eugene Zaikonnikov.
• Further improvements to conformance, stability and performance.
• The CLOS implementation follows the MOP much more closely.
• More traditional window management.
• Booting from CD/USB on real hardware is now possible.
• Driver support for Intel HDA audio devices.
• VirtualBox guest (mouse & display) integration.

• Many improvements to conformance, stability and performance.
• The editor has been greatly improved, thanks to Burton Samograd.
• The system now functions correctly on computers with more than 1GB of RAM.
• The allocator and garbage collector now make much better use of available memory, with far fewer GC cycles occuring.
• (ROOM T) prints more detailed information about allocated objects.
• Transparency and premultiplied alpha support in the GUI.
• And more!

"Hypothymis azurea - Kaeng Krachan" by JJ Harrison (jjharrison89@facebook.com) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons https://commons.wikimedia.org/wiki/File:Hypothymis_azurea_-_Kaeng_Krachan.jpg

"Mandarin Pair" by © Francis C. Franklin / CC-BY-SA-3.0. Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Mandarin_Pair.jpg

"Handsome" by Andy Morffew - https://www.flickr.com/photos/andymorffew/19377769093/in/album-72157630893775092/ [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)]

Includes Dejavu Fonts 2.37 (https://dejavu-fonts.github.io/)

Some icons from Icojam (http://www.icojam.com)

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