o Added support for Sega Master System using --sms
o Added support for VDP.STATUS (for reading VDP status)
o Added SELECT CASE / END SELECT
o Added support for CHR$ in PRINT (for portable printing of arbitrary characters in the current cursor position)
o Added SCROLL statement for Sega Master System.
o Added BORDER flags for Sega Master System.
o Added PALETTE statement for Sega Master System.
o Adapted BITMAP, SCREEN, and SPRITE for Sega Master System.
o Optimizes code using directly DI/EI instructions in Z80 platforms if possible.