Revision History for Pic18Forth

0.0.4:

 - Feb 13, 2005

    - Major compiler codebase re-work - far simpler now:
        - compiler object has a simpler method called 'generate', which
          allows generation of bytecode, with control over how it will
          appear in the listing file
        - removed all capability from compiler and moved into 'compilerwords.f',
          such that the compiler starts with almost zero capability and bootstraps
          itself from the library files into a working forth compiler
    - Added meta words 'parser'..';parser', allowing addition of code to
      the compile-time parse chain
    - Added meta words 'init'..';init', allowing forth statements to be inserted
      into system startup code block
    - Added new lib module 'lib/dyntasks.f', which uses 'lib/malloc.f', and
      provides the ability to create tasks at run-time
    - Added words 'isrhigh', ';isrhigh', 'isrlow' and ';isrlow', which enclose
      blocks of assembler code to be built into high-priority and low-priority
      interrupt handlers, respectively
    - Added new library modules 'lib/nointerrupts.f' (for apps which don't handle
      interrupts), and 'lib/clockinterrupt.f' (which sets up a millisecond-timer
      interrupt, and which defines a primitive 'time' which pushes current time
      to the stack (as 32-bit count of milliseconds elapsed)
    - Added module 'lib/clockdelay.f', which provides delay routines which use
      the clockinterrupt setup, and thus are suitable for use in multitasked
      progs (one task waiting does not block other tasks)
    - Added parallel LCD module driver plus example progs
    - Numerous bug fixes

0.0.3:

 - Feb 1, 2005

    - added new library modules 'exceptions.f' (exception handling) and
      'tasks.f' (simple multitasker)
    - created separate examples directory
    - fixed several more bugs
 
0.0.2:

 - Jan 27, 2005

    - added lib/malloc.f library module, which implements allocate and free
    - implemented 'new', for runtime instantiation of classes via allocate
    - upon static or dynamic instantiation, the 'init' method of classes
      (if declared) will be invoked
    - added memory operators img@ and img-c@ (for reading the program bytecode),
      ram@, ram-c@, ram!, ram-c! (for reading/writing directly to RAM)

0.0.1:

 - Jan 24, 2005

    - fixed critical local vars bug
    - completed first stage of OO engine (lib/oo.f, demo in tests/test19.f)

0.0.0:

 - Jan 23, 2005:

    - first pre-pre-alpha release