Release v9.7 · irmen/prog8

A big release this time

incompatible changes

removed diskio.set_drive() , just set diskio.drivenumber directly
sys.set_irq() and sys.set_rasterirq() no longer have a useKernal parameter! The irq handler routine must return a boolean instead in the A register, that determines if the system IRQ handler should run afterwards or not.
palette module: changed in the available preset routines.

underscores are now allowed in numbers to group digits for improved readability of large numbers
multiple variables can be declared on one line ubyte x,y,z
multiple assignments can be done in one go x=y=z=calculate()
new module directive %encoding to set the text encoding for the whole file
allow all character encodings for all compilation targets
added continue statement to continue with the next loop iteration
allow Unicode letters in identifiers: things like knäckebröd and π are now valid identifiers. Added floats.π constant.
allow constant expression intermediate values to be 32 bits integers to avoid overflow errors: uword large = 320*240/8/8 is now okay.

new "master" irq handler see cx16.enable_irq_handlers() and associated subroutines, and "Commander X16 specific IRQ handling" in the manual
palette module got more accurate color space conversion
improved the emudbg library
added bmx library to read and write "BMX" bitmap images. See "showbmx" example
added some routines to the sprites module: move, movex and movey to move the sprite by on offset
added more registers to verafx module

added various subroutines to the strings module: hash, isdigit, isupper, islower, isletter
added pokef() and peekf() for floating point numbers
added floats.str_f() to convert a float number to a string (without printing it)
many optimizations and bug fixes.

Full Changelog: v9.6...v9.7