INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CLR_CRTSW" - SET CRT TO MONOCHROME
	AX = 0418h
	BP = 00AEh (driver ID for V_8041)
Return: AH = status (see #03744)
	BP,DS destroyed
Desc:	clears a flag in the 8041, indicating that the primary display is the
	  monochrome adapter
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0414h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh