Hey guys this is version 0.9 of DEQOS, a fully functionnal operating system for DCPU-16 here are the key features (actually working right now) : - Real Preemptive multi tasking (with priorities and everything...) - Multi consoles (3 linux-like virtual consoles, with instant switch using CTRL+1,2 or 3) - Semaphore synchronization (mutex, focus-sync) - Memory allocation (malloc, free) - Tiny FAT system (whole FAT in one sector for faster response) - Boot loader : loads the system from disk - Program loading and executing using the LOADP NAME.PRG command - Client programs API (Stack, Gui, Keyboard, Memory, Time, Disk, 32 bit Math, etc...), all thread safe - Supports the NE_LEM1802 screen, HIT_HMD2043 disk drive, Generic Clock and Generic Keyboard devices Source code is available, customize it, port it, contribute, or just use the code as a reference as you wish (please credit me somewhere if you do ;) ) Code is heavily commented and *MAY* help some beginners to understand how Operating System works (especially on the multi threading / Mutex parts) .. and have fun with it :) DEQOS can be tested using the provided "DCPUStation" Assembler/Emulator/Symbolic debugger (Windows/Linux (with mono) ). Several sample programs have been included in the test project. To test, launch DCPUStation.exe (on Linux, type "mono DCPUStation.exe" in a terminal) then open the DEQOS_Project.vdcpu16 project, and select Build/Assemble and Run Then, use CTRL-1 CTRL-2 and CTRL-3 to alternate between virtual consoles commands are : DIR to list the files on the disk, LOADP to run programs, MEM to show the available memory PS, in the works : DOS-like text drop down menus and windows, Text editor. EqualizR equalizr@free.fr