INT 2F - Pharlap DOS ExtenderA program which allows a program to run in protected mode while still retaining access to real-mode MSDOS services.  See also Protected Mode. - FATAL EXIT TO REAL MODE ???
	AX = ED11h
	BL = 05h
	CX = ???
	DX = ???
	ES:SI -> ??? structure
	SS:SP = new stack ???
Return: ???
Note:	called immediately prior to terminating program with INT 21/AX=4CFFh
SeeAlso: AX=ED00h,AX=ED10h