Date : 19 January 2011
Organisations : Koninklijke Bibliotheek, Nationaal Archief of the Netherlands

0.7.0 : 19-01-2011
- implemented VNC support. Dioscuri can now act as a VNC server so that it can be operated from other host(s) (credits: Evgeni Genev). Tested with the VNC client from TightVNC which has native Windows and Linux support and also a Java based client that could be used on a Mac with a JRE.
- fixed some small hot-spots that showed up after profiling version 0.6.0
- changed some of the logging settings that were popping up too many warnings after the redesign from 0.6.0

0.6.0 : 23-09-2010
- complete redesign of the hardware module structure
- there can now be 2 hard disks connected at once
- the mouse works under 16 bit, be it with quite a bit of lag: so there's still work to be done on that front
- fixed the fact that file paths were not entirely visible in the GUI config menus
- added a command line parameter option to enable, or disable the mouse
- Windows 3.0 runs smoothly under 32 bit
- cleaned up the code base quite a bit
- improved the configuration menu
- possible to create screen shots during emulation

0.5.2 : 21-04-2010
Some bug fixes:
- can now write to HD in 32 bit mode
- Windows XP look and feel no longer looses a part of the characters at the bottom of the screen
- white spaces in paths to disc images (files) no longer cause trouble

0.5.0 : 19-03-2010
- improved command line interface options
- added a label on the GUI that shows in which mode the emulator is running: 16- or 32 bit
- Dioscuri can now be executed from any location and still finds it's configuration- and image files stored in the application folder
- separated some logic from the GUI class and moved it to the util.dioscuri.Utilities class
- extracted an interface from the main JFrame so that it will be easier to create an applet of Dioscuri
- started working on unit tests for CPU instructions
- improved Javadoc API
- various bug fixes

0.4.0 : 11-12-2008 (MS Windows 3.0 capable)
- Added backwards compatibility with JRE 1.5
- Added command-line interface
- Improved 32-bit CPU
- Fixed minor bugs in modules CPU
- Updated GUI

0.3.0 : 14-02-2008 (MS Windows 3.0 capable)
- Added 32-bit CPU from JPC project (
- Added serial mouse support (experimental)
- Added serial port (UART 16550A with COM-ports 1 to 4)
- Fixed minor bugs in modules CPU, DMA, PIC
- Updated GUI

0.2.0 : 03-09-2007 (FreeDOS and ELKS capable)
- Fixed minor bugs in CPU instructions and added some new instructions
- Fixed keyboard status LEDs on GUI
- Improved system timer and PIT
- Improved GUI for image file selection
- Improved keyboard controller for mouse/keyboard control
- Added functionality to copy text to clipboard (text mode only)

0.1.0 : 13-08-2007 (MS-DOS 16-bit stable)
- Fixed CPU/PIC problem (context switch interrupting repeat prefix handling)
- Fixed cursor problem
- Fixed minor bugs in CPU instructions
- Fixed VGA screen update (sometimes buffer got scrambled)
- Improved PIT timer functionality
- Improved keyboard support for extra characters
- Improved GUI with crossplatform Java Swing interface
- Added support for system clock based on PIT interrupts

0.0.9 : 01-07-2007 (Sourceforge launch)
- Full IDE/ATA support for hard disk
- Full graphics pixel mode
- Added XML-based configuration functionality
- Improved GUI
- Added new CPU instructions
- Fixed some CPU instructions
- Improved floppy disk controller with write functionality (via DMA)
- Improved RTC timer to set and get clock time and date
- Improved logging structure (for debugging only)
- Improved debug mode functionality

0.0.8 : 15-05-2007
- Improved IDE/ATA with HDD support (experimental)
- Added new CPU instructions
- Fixed some CPU instructions
- Improved virtual screen output
- Improved overall GUI
- Added emulation process control
- Added virtual floppy swapping

0.0.7 : 26-04-2007 (MS-DOS 16-bit capable)
- Added many new instructions in CPU
- Fixed many bugs in several CPU instructions
- Fixed bugs in floppy disk controller (read-only)
- Added A20 address line support for memory wrapping
- Introduced IDE/ATA support (partly)
- Extended PIC support

0.0.6 : 29-01-2007 (Launch at Planets meeting Pisa, Italy)
- Created modules clock, FDC, IDE, keyboard, PIC
- Introduced timing mechanism for devices video, keyboard, fdc
- Introduced interrupt handling
- Introduced DMA support
- Introduced floppy disk support (floppy disk images only)
- Introduced keyboard input
- Added a lot of new instructions to 16 bit CPU instruction set
- Instruction prefix support for segment selection
- Added hack in memory for A20-address line

0.0.5 : 20-10-2006 (Launch at Emulation Expert Meeting, The Hague, The Netherlands)
- Created modules motherboard, screen, video, BIOS, CMOS, PIT, RTC and stubs for DMA, serialport, parallelport
- Introduced subset of module -> module device
- Introduced I/O address space for devices
- Introduced reset function for modules
- Introduced screen output to virtual screen (character display only)
- Introduced memory mapped I/O
- Added BIOS ROM and CMOS settings
- Load and execution of BIOS
- Added instructions IN, OUT, MOV, REPZ, CALL, STOSW
- Instruction prefix support for 32-bit computing
- Fixed a lot of bugs in CPU instructions
- Excluded observer/observable design pattern

0.0.4 : 18-05-2006
- Introduced debug mode for modules
- Introduced observer/observable pattern
- Added arithmetic instructions ADD, SUB and logic instructions OR, CMP, etc.
- Added class IO for communication emulator/environment
- Added command-driven control in emulator
- Moved UI out of CPU module into a separate IO class
- Substituted Java.Util.logging instead of standard.out

0.0.3 : 14-04-2006
- Added some new single byte instructions to subset
- extended UI to comply with debug.exe in MS DOS

- Added simple UI for CPU communication

0.0.1 (Initial version of emulator)
- Created modules CPU and memory
- Introduced modular architecture
- Introduced flat memory model
- Added subset of CPU 8086 16 bit instructionset