INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_ENABL_INTR" - START INTERRUPT SRVICE
	AX = 040Eh
	BP = 00AEh (driver ID for V_8041)
	BH = vector number of driver to be called regularly (vector addr / 6)
Return: AH = status (see #03744)
	BP,DS destroyed
Desc:	enable 60 Hz calling of a driver previously added to the list of
	  drivers to be called by the HP's 8041
SeeAlso: AH=00h"HP Vectra",AX=040Ah/BP=00AEh,AX=0410h/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh