Interrupt  0Ah  EGA Vertical Retrace
(0:0028h)  (IRQ2)  used by EGA vertical retrace, hard disk 
note 1) On the Tandy 1000, this interrupt is used by the hard disk 
     2) The TOPS and PCnet adapters use this interrupt request line by default 
(internal) invalid task state segment (80286 protected-mode)