Roadmap:

Ideas not yet verified:

- URL transcript stream (transcript could be transferred to an URL)

TODO:

- save and restore with regions
- input line editing (new screen model)
- text selection (new swing standard text component based screen model)
- cut, copy, paste (new screen model)
- scrollback (new screen model)
- add character graphics font
- window size should be an option in preferences or the window should be sizable

V6:

opcodes:

- @make_menu, @print_form
- @outputstream with table width (do something with the table width)
- verify screen model details
- implement @mouse_window with window restriction
- @read_mouse should handle menus

@make_menu: Journey
@print_form: Arthur
@output_stream 3 params: Arthur (width always 0)

Version 1.5 ("Schmalzy Core")
-----------------------------
This is a major redesign. Changes include:

- cut dependencies to AWT and Swing in the core -> done
- change core to use resume/continue execution model like in Schmalz -> in progress
- implement abstract I/O model that does heavy lifting for the user
  interface (ZmppIO), with an additional Glk interface for Glulx
- move timed input out of the core (-> ZmppIO)
- move command history out of the core  (-> ZmppIO)
- move sound rendering out of the core (-> ZmppIO)
- use Swing standard components for display ("zmpp-swing2")
- simplify public interface and VM setup (replace MachineFactory by initialization scheme) -> done
- make instruction decoding like Schmalz
- make Z-encoding like Schmalz
- make tokenization like Schmalz (Binary search match)
- make instruction caching optional
- make caching of original game memory chunk optional
- make core classes Serializable for easier web application support

Version 1.0
-----------
- fix design flaws
- internationalized UI
- MacOS X integration

Version 0.92
------------
- V6 support
- antialiasing
- change stack model
- implement all commands
- move stream buffering into the sub windows
- find out why the layout calculation does not work in V6

Version 0.90
------------
- customizable default colors and font sizes
- make settings dialog for standalone version
- fix the problem that leads to focus loss in Mozilla and Opera
- do more benchmark testing and tuning

Version 0.89
------------
- performance tuning (Inform 7 games seem to run significantly slower)
- metadata and frontispiece support
- command history
- applet version: display front picture and load progress bars

Version 0.87
------------

- rudimentary V6 support
- sound
- last-minute enhancement: read ZCOD chunks from BLORB files

Version 0.86
-----------

- blorb support
- sound

Version 0.82:
-----------

- add missing header information
- game-defined dictionaries, extend tokenise using user dictionary
- game-defined accent tables and alphabet tables
- opcodes: @encode_text, @print_table, @throw, @catch
- different alphabet tables
- support version 1 and 2
- fix screen model bugs (font sizes, color and missing newline "Beyond Zork", "Blue Chairs")

Version 0.78:
------------

- timed input (introduced here, since Border Zone is the first Infocom game
  using this feature)
- print_unicode (EXT)
- check_unicode (EXT)  
- rework paging scheme, buffering up all output until input is requested
- run terpetude successfully
- ZsciiEncoding supports the full unicode set

Version 0.75:
-------------

- revisit Z-decoding
- improve tests
- play some games
- implement opcodes:
  1. copy_table
 
Version 0.74:
-------------

- runs "Curses" and some other V5, V7 and V8 games
- change header attribute setting model, string or enum based for more
	flexibility
- allow cursor keys as input for read_char
- add V7 and V8 addressing
- opcodes:
  - new:               - changed:                          - illegal
    1. not (VAR)         1. sread -> aread (is store)        1. save (0OP)
    2. call_2n           2. not -> call_1n                   2. restore (0OP)
    3. call_vn
    4. call_vn2
    5. piracy
    6. tokenise
    7. check_arg_count
    
- extended opcodes:
  1. save (regular)
  2. restore (regular)
  3. save_undo
  4. restore_undo
  5. log_shift
  6. art_shift
  7. set_colour
  8. set_font
 
Version 0.72:
-------------

Reference games: Seastalker (V3, for screen splitting), A mind forever voyaging,
                 Trinity

- support story file version 4
- translate packed addresses differently
- support font styles
- extended object table
- toggable text buffering
- support screen splitting
- support paging
- toggable scrolling
- need to support stream 3 (this was discovered during testing of "A mind
  forever voyaging")
- adjust quetzal start pc for version >= 4 games
- opcodes:
  - new:                  - changed:                 - illegal:
    1. call_2s              1. save                       1. show_status
    2. call_1s              2. restore
    3. call_vs2             3. sread (will not modify for timed input)
    4. set_text_style
    5. buffer_mode
    6. erase_window
    7. erase_line
    8. set_cursor
    9. get_cursor
    10. read_char (no timed input in this version)
    11. scan_table
    
Version 0.70
-------------

Reference games: Minizork, Zork I, Leather goddesses of Phobos

- support story file version 3
- provide Swing application and applet interfaces
- support streams and screen model 3
- support ZSCII and encoded ZSCII
- support Quetzal save game format