Interrupt  0Dh  Alternate Printer, (AT 80287)
(0:0034h)  (IRQ5)  used by hard disk, 60 Hz RAM refresh, LPT2 on AT, XT/286, 
	    and PS/2, dummy CRT vertical retrace on PCjr 
note    Tandy 1000 uses this line for the 60Hhz RAM refresh 
(internal) general protection violation (80286) 
	Called in real mode when an instruction attempts to access a word 
	operand located at offset 0FFFFh