INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DISABLE_SVC" - MASK 8041 SVC INT
	AX = 0402h
	BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
	BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=001Eh,AX=0406h/BP=001Eh
SeeAlso: AX=040Ah/BP=001Eh