INT 49 - MAGic v1.23+ - SET TEXT MODE MAGNIFICATION SIZE

	AX = 0008h
	BX = scaling factor (01h=1.4 times, 02h, 04h, 06h, 08h, 09h=12 times)
Return: AX = status
	    0000h successful
	    FFFBh scaling factor only available in MAGic Deluxe
	    FFFCh already in magnified state, can't set size
Notes:	this call specifies the amount a subsequent call to AX=0001h should
	  magnify the display
	scaling factors greater than 2 are only available in MAGic Deluxe
SeeAlso: AX=0001h