INT 13 - HARD DISK - PS/1 and newer PS/2 - SET CONTROLLER FEATURES REGISTER

	AH = 23h
	AL = feature number (see #00266)
	DL = drive number (80h,81h)
	???
Return: CF clear if successful
	CF set on error
	AH = status (see #00234 at AH=01h)
SeeAlso: AH=21h"PS/1",AH=22h"PS/1",AH=24h"PS/1",AH=25h"PS/1"