Add breakpoint:
	- addBreakpoint(address)

Remove breakpoint:
	- restore 4 bytes
	- remove breakpoint + 4 bytes from the breakpoint list

Step:
	- inject temp breakpoints
	- set stepping bit
	- return to code

Breakpoint handler:
	- eventually restore temp breakpoints
	- if stepping bit set:
		- jump to code main to continue stepping
	- else:
		- restore breakpoint call
		- if it was a fixed breakpoint:
			- open UI
		- else:
			- return to code

Inject temp breakpoints:
	- addBreakpoint(PC + assemly line length)
	- if it's a If, While, Repeat or For(: ?????
		- addBreakpoint(jump address)
	- else:
		- get return address
		- if address > RAM_START:
			- addBreakpoint(return address)