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86 lines
5.1 KiB
ReStructuredText
86 lines
5.1 KiB
ReStructuredText
========================
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Upgrading from version 8
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========================
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How to upgrade older programs written for Prog8 version 8 or earlier to version 9.
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List of new stuff in version 9
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Details of several important ones and how to convert version 8 code can be found below this list.
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- added 'cbm' block in the syslib module that now contains all CBM compatible kernal routines and variables
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- added min(), max() builtin functions. For floats, use floats.minf() and floats.maxf().
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- added clamp(value, minimum, maximum) to restrict a value x to a minimum and maximum value. For floats, use floats.clampf(f, minv, maxv).
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- rename sqrt16() to just sqrt(), make it accept multiple numeric types including float. Removed floats.sqrt().
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- abs() now supports multiple datatypes including float. Removed floats.fabs().
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- divmod() now supports multiple datatypes. divmodw() has been removed.
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- cx16diskio module merged into diskio (which got specialized for commander x16 target). load() and load_raw() with extra ram bank parameter are gone.
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- drivenumber parameter removed from all routines in diskio module. The drive to work on is now simply stored as a diskio.drivenumber variable, which defaults to 8.
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- for loops now skip the whole loop if from value already outside the loop range (this is what all other programming languages also do)
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- asmsub params or return values passed in cpu flags (like carry) now must be declared as booleans (previously ubyte was still accepted).
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- (on cx16) added diskio.save_raw() to save without the 2 byte prg header
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- added sys.irqsafe_xxx irqd routines
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- added gfx2.fill() flood fill routine
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- added @split storage class for (u)word arrays to store them as split lsb/msb arrays which is more efficient (but doesn't yet support all array operations)
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- added -splitarrays command line option and '%option splitarrays' to treat all word arrays as tagged with @split
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- the -target option is now required, c64 is no longer a default.
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``cx16diskio`` is now just ``diskio``
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The ``cx16diskio`` module is gone, just use ``diskio``. The drivenumber is no longer a parameter on all routines.
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* replace all imports and references to ``cx16diskio`` with just ``diskio``
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* remove all drive number arguments from the calls. If you're not using drive 8, set the correct drive
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with a call to ``diskio.set_drive()``. Read the active drive from ``diskio.drivenumber``.
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* replace load calls that use a ram bank argument by setting the ram bank first using ``cx16.rambank()``
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and then call the load routine normally.
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@Pc param and return value is now always ``bool``
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Parameters and return values passed via the carry status flag (@Pc) now need to be declared as ``bool``.
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(Previously also ``ubyte`` was allowed but as the value is just a single bit, this wasn't really correct)
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Standard Commodore kernal calls moved to ``cbm``
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Instead of ``c64``, the CBM compatible kernal calls (such as CHROUT) and a bunch of variables, are now
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located in the ``cbm`` module. You don't have to import this module as it is part of the syslib.
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* replace all references such as ``c64.CHROUT`` with the ``cbm`` module instead to fix those undefined symbol errors.
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some routines moved to ``sys``
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Several routines have been moved to the ``sys`` module rather than being in ``c64`` or ``cx16`` for instance.
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An example is ``set_irq()``. If you fixed the previous item above, and still get undefined symbol errors,
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the routine is likely now located in the ``sys`` module so simplychange its prefix to ``sys.``
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for loop range checking to avoid wrap-around looping
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Modify any for loops that depend on a 'wrap-around' loop where the from value lies
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outside of the the loop range (for example: a loop from $fe to $02 which used to loop through $fe, $ff, $00, $01 and $02).
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For loops now do a check at the start and skip the whole loop if the start value is already outside of the range.
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This is the normal behavior of most other programming languages.
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divmod(), sqrt() and abs() builtin functions accept multiple data types
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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- ``divmodw()`` doesn't exist anymore, just use ``divmod()``.
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- ``sqrt16()`` doesn't exist anymore, just use ``sqrt()``.
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- ``floats.fabs()`` and ``floats.sqrt()`` don't exist anymore, just use ``abs()`` and ``sqrt()`` they now accept floating point as well.
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min(), max() and clamp() are new builtin functions
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If you used symbols named ``min`` or ``max`` or ``clamp``, you have to choose a new name as these are now
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reserved for these new builtin functions.
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Code that uses an if statement and a comparison to determine the greater or lesser of two values,
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can now *sometimes* be optimized by just using one of these new builtin functions. (But sometimes
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just using a simple if statement results in more efficient code. If your goal is fastest code,
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compare both approaches!)
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For floats, use ``floats.minf()``, ``floats.maxf()`` and ``floats.clampf()``.
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