It is designed by the digital preservation community to make sure that documents and programs from the past can still be experienced in the future. Dioscuri is durable and component-based.

Release Name: 0.4.0

Notes: Dioscuri version 0.4.0 incorporates improved 32-bit support and compatibility with the Java Runtime Environment 1.5 Furthermore, it is now possible to automatically start the emulation process via the command-line interface.


Changes: Changelog Dioscuri - Modular emulator for Digital Preservation ==============================================================
Date : 11 December 2008 Organisations : Koninklijke Bibliotheek, Nationaal Archief of the Netherlands, Tessella Support Services plc. 0.4.0 : 11-12-2008 -------------------------------------------------------
- Made some changes in order to make Dioscuri JDK/JRE 1.5 compliant:
- added nl.kbna.dioscuri.util.Deque to replace Java 1.6´s java.util.Deque interface - nl.kbna.dioscuri.module.cpu32.PriorityDeque now implements nl.kbna.dioscuri.util.Deque instead of the java.util.Deque interface
- changed a couple of JDK 1.6 Arrays.copyOf(...) calls in nl.kbna.dioscuri.module.cpu32.PriorityDeque to the more verbose System.arraycopy(..,) etc. - nl.kbna.dioscuri.module.cpu32.ProtectedModeUBlock, nl.kbna.dioscuri.module.cpu32.Virtual8086ModeUBlock and nl.kbna.dioscuri.module.cpu32.RealModeUBlock made some calls to java.lang.Math method available in Java 1.6. These methods are now also available in: nl.kbna.dioscuri.module.cpu.Util and changed nl.kbna.dioscuri.module.cpu32.ProtectedModeUBlock and nl.kbna.dioscuri.module.cpu32.RealModeUBlock accordingly.
- nl.kbna.dioscuri.module.cpu32.RPNNode made a call to binarySearch(int[] a, int fromIndex, int toIndex, int key) which has been rewritten as: binarySearch(int[] a, int key) which will take slightly longer, of course, but still performs a O(log(n)) in Big-O terms, so it should be a noticeable difference. - Support for command-line interface 0.3.0 : 14-02-2008 (MS Windows 3.0 capable)
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- Added 32-bit CPU from JPC project (http://www.physics.ox.ac.uk/jpc) - 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)
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- 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)
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- 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)
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- 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
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- 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)
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- 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)
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- 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)
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- 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
- Added VGA BIOS ROM
- 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
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- 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
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- Added some new single byte instructions to subset
- extended UI to comply with debug.exe in MS DOS 0.0.2
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- Added simple UI for CPU communication 0.0.1 (Initial version of emulator)
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- Created modules CPU and memory
- Introduced modular architecture
- Introduced flat memory model
- Added subset of CPU 8086 16 bit instructionset