INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (VGA/MCGA)

	AX = 1015h
	BL = palette register number
Return: DH = red value
	CH = green value
	CL = blue value
	AX destroyed by some BIOSes
	      (e.g. Tseng ET4000 BIOS v8.00n always returns AX=00C9h)
SeeAlso: AX=1010h,AX=1017h