INT 33 - MS MOUSE v7.0+ - SET VIDEO MODE                                        
	AX = 0028h
	CX = new video mode (call is NOP if 0000h)
	DH = Y font size (00h = default)
	DL = X font size (00h = default)
Return: CL = status (00h = successful)
Notes:	DX is ignored unless the selected video mode supports font size control
	when CX=0000h, an internal flag that had been set by a previous call
	  is cleared; this is required before a mouse reset
SeeAlso: AX=0029h,INT 10/AH=00h