TODO

TODO
	Bugs
		Fix H/GDMA?										????
		Fix sound bugs 									DONE
		Fix time allocated to CPU and timer				****************
		Fix DAA instruction								DONE
		Fix HALT instruction							DONE
		Implement STOP instruction
		Initialise sound/graphics data properly!
		Fix weird slow downs
		Fix slight graphical inaccuracies: sprites not lining up exactly with background?		Why is this?
	Rewrites
		the SDL_Delay() calling code is bad: needs to work on a FPS basis?
		consider making the tile cache not use SDL surfaces/blitting			DONE
	Implementation
		serial hack (IS THIS DONE?)						DONE???
		MBC3 real time clock							DONE
		Implement display off feature: the absense of this causes lots of problems: DONE
		Sprite ordering									?????
		State save/load DONE (mostly)
		Gameboy Color support 							DONE
		Joystick support
		internal GB and GBC boot rom support
		settings/config file
	Tidying
		Tidy memory code. its horrible
	Nice extras
		video/sound file output
		speed adjustment
		dump tiles
		UI
		Full-featured debugger
		Nice scaling algorithms (hqx, etc)
		Simple disassembler
			Bit instructions
		
	Check behaviour on real hardware
		Sound 
			sweep/envelope function
		Display
			How LY=LCY coincidences are dealt with