Board.KolibriOS.org

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        mov     [irq14_func], hdd_irq14
        mov     [irq15_func], hdd_irq15

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        mov     [irq14_func], hdd_irq_null
        mov     [irq15_func], hdd_irq_null

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align 4
hdd_irq14:
        pushfd
        cli
        pushad
        mov     [irq14_func], hdd_irq_null
        mov     dx, [IDEContrRegsBaseAddr]
        mov     al, 0
        out     dx, al
        popad
        popfd
align 4
hdd_irq_null:
        ret

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align 4
hdd_irq14_null:
        pushfd
        cli
        pushad
        mov     dx, [IDEContrRegsBaseAddr]
        mov     al, 0
        out     dx, al
        popad
        popfd
        ret

align 4
hdd_irq15_null:
        pushfd
        cli
        pushad
        mov     dx, [IDEContrRegsBaseAddr]
        add     dx, 8
        mov     al, 0
        out     dx, al
        popad
        popfd
        ret

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; There is at least one configuration with one device which generates IRQ
; that is not the same as it should be according to PCI config space.
; For that device, the handler is registered at wrong IRQ.
; As a workaround, when nobody acknowledges the generated IRQ,
; try to ask all other registered handlers; if some handler acknowledges
; the IRQ this time, relink it to the current IRQ list.
; To make this more reliable, for every handler keep number of times
; that it has acknowledged an IRQ, and assume that handlers with at least one
; acknowledged IRQ are registered properly.
; Note: this still isn't 100% correct, because two IRQs can fire simultaneously,
; the better way would be to find the correct IRQ, but I don't know how to do
; this in that case.
; Also, [fdc_irq_func], [irq14_func], [irq15_func] could process interrupt
; but do not return whether they did it, so just ignore IRQs 6, 14, 15.

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int drm_irq_install(struct drm_device *dev)
{
    AttachIntHandler(irq_line, intel_irq_handler, (u32)dev);
};
irqreturn_t intel_irq_handler(struct drm_device *dev)
{
//    printf("i915 irq\n");
    return dev->driver->irq_handler(0, dev);
}