Int 0A  - IRQ2 - LPT2 (pc), Vertical Retrace Interrupt (ega,vga)           [H]


Notes: the TOPS and PCnet adapters use this interrupt request line by default
   DOS 3.2 revectors IRQ2 to a stack-switching routine
   on ATs and above, the physical data line for IRQ2 is labeled IRQ9 and
     connects to the slave 8259.  The BIOS redirects the interrupt for
     IRQ9 back here.
   under DESQview, only the INT 15h vector and BASIC segment address (the
     word at 0000h:0510h) may be assumed to be valid for the handler's
     process
   many VGA boards do not implement the vertical retrace interrupt,
     including the IBM VGA Adapter where the traces are either cut or
     removed

See Also: INT 52"DESQview",INT 5A"DoubleDOS",INT 71,INT 7A"GO32"