Added support for non-addressable regions, which are useful for things
like file headers stripped out by the system loader, or chunks that
get loaded into non-addressable graphics RAM. Regions are specified
with the "NA" address value. The code list displays the address field
greyed out, starting from zero (which is kind of handy if you want to
know the relative offset within the region).
Putting labels in non-addressable regions doesn't make sense, but
symbol resolution is complicated enough that we really only have two
options: ignore the labels entirely, or allow them but warn of their
presence. The problem isn't so much the label, which you could
legitimately want to access from an extension script, but rather the
references to them from code or data. So we keep the label and add a
warning to the Messages list when we see a reference.
Moved NON_ADDR constants to Address class. AddressMap now has a copy.
This is awkward because Asm65 and CommonUtil don't share.
Updated the asm code generators to understand NON_ADDR, and reworked
the API so that Merlin and cc65 output is correct for nested regions.
Address region changes are now noted in the anattribs array, which
makes certain operations faster than checking the address map. It
also fixes a failure to recognize mid-instruction region changes in
the code analyzer.
Tweaked handling of synthetic regions, which are non-addressable areas
generated by the linear address map traversal to fill in any "holes".
The address region editor now treats attempts to edit them as
creation of a new region.
If an address map entry wraps around the end of a bank, add a note
to the message log. This is Error level, since some assemblers
will refuse to handle it.
If a local variable table gets buried, it won't appear in the code
list, so most things ignore it. Unfortunately, the code that adds
new entries and edits tables was finding them, which was causing
variable definitions to appear to fall into a black hole.
This is addressed in two ways. First, we now add a message to the
log when a hidden table is noticed. Second, the code that finds
the nearest prior table now keeps track of hidden vs. not hidden.
If a non-hidden table is available, that is returned. If the only
option is a hidden table, we will return that, because the callers
have already assumed that a table exists by virtue of its presence
in the LvTable list.
Implemented show/hide mechanic, using a button on the right side of
the status bar to show status and to trigger un-hide.
Also, show I/O direction in project symbols editor list.
This converts the "problem list viewer" tool to a grid that appears
below the code list view when non-empty. Not all messages are
problems, so it's being renamed to "message list".
