INT 67 - Virtual Control Program InterfaceA simple API for protected-mode programs to allocate memory and switch into or out of protected mode.  See also DOS Protected-Mode Interface. - GET 8259 INTERRUPT VECTOR MAPPINGS
	AX = DE0Ah
Return: AH = 00h successful
	    BX = first vector used by master 8259 (IRQ0)
	    CX = first vector used by slave 8259 (IRQ8)
	AH nonzero: failed
Note:	CX is undefined in systems without a slave 8259
SeeAlso: AX=DE0Bh,INT 21/AX=250Ch,INT 31/AX=0400h