INT 10 - VIDEO - FLAT-PANEL - NORMAL/REVERSE VIDEO FOR TEXT/GRAPHICS MODES

	AX = 1E04h
	BH = function
	    bit 7: =1 set normal/reverse video, =0 query normal/reverse
	    bits 6-0: reserved (0)
	---if BH bit 7 set---
	BL = new normal/reverse video setting (see #00057)
Return: AL = 1Eh if function supported
	    BH = results
		bit 7: query/set (copied from input)
		bits 6-4: reserved (0)
		bit 3: hardware supports reverse video for text modes
		bit 2: hardware supports reverse video for graphics modes
		bit 1: hardware supports independent control of reverse video
		      in text and graphics modes
		bit 0: set operation was successful (always clear on get)
	    BL = active normal/reverse video setting (see #00057)
SeeAlso: AX=1E00h,AX=1E03h,AX=1E05h