Mezzano

Mezzano, an operating system written in Common Lisp. Pre-built images 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. Building from source 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) Major changes since Demo 4 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 Major changes since Demo 3 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. Major changes since Demo 2 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. Major changes since Demo 1 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! Additional information "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)