-implemented APU zombie mode for volume control
-corrected several CPU instruction timing details
-properly implemented OAM DMA with all its timings etc
-corrected some memory bugs and improved timer accuracy
-added basic serial I/O control support as some games rely on its interrupt
-improved PPU accuracy and implemented STAT DMC bug required for some games
-dont close emu on invalid cpu instruction, freeze game instead until a button is pressed
-set window title more proper
-display currently playing .gbs track on screen rather than just on the console via bitmap font
-corrected several registers and added some unofficial (FF72-FF77) regs
-added HuC1, MBC2 and MBC3 RTC support and corrected MBC bugs
-proper PPU line 0 set, fixes several graphical glitches