Vectored Hardware Lines (AT/XT286/PS50+)

        IRQ8    real-time clock
        IRQ9    LAN adapter 1 (rerouted to INT 0Ah by BIOS)
        IRQ10   reserved
        IRQ11   reserved
        IRQ12   PS50+ mouse interrupt
        IRQ13   80287 error (rerouted to INT 2 by BIOS)
        IRQ14   fixed disk
        IRQ15   reserved