There is enough room in the 32-byte exception handler to inline the
9-byte epilogue when generating the code sequence for mixed BG1/BG0
rendering.
This code sequence is generated once and run for as many frames as the
word appear on screen, so saving an uncondition branch (3 cycles) at the
cost of 60 cycles is probably worth it.
* Moved V-flag handling outside of the 32-byte exception handler
* Switched relative branches to JMP to save a cycle per word
* Updated macros to create a full code snippet instead of assuming
certain values exist in the exception handler buffer
* Tiled tile animations read from TSX files
* Hooks for initialization generated by the tiled export tool
* Animated tiles implements with dynamic tiles backed by 2KB of direct
page space in Bank 00
* Animation resolution limited to 1/60th incremenents
TODO
* Fix crasher in the _DoScriptSequ timer callback
* Fix single-line of garbage on the top line of the dynamic tiles
The core data tables were reworked to pre-reverse all of the
entries to directly match the right-to-left ordering of the code
fields. This simplified some code but was required for register
reuse in the masked tile renderer.
Also fixed several offset calculation issues in the masked tile
renderer.
Need to have the called provide a copy of the base line address to the
masked drawing code and need to verify that the JTable entries are
ordered the same way as the byte offset so the same register can be used
to load the JMP addresses and patch in the LDA (DP),y instructions.
