====== cpunum_set_irq_callback() ======

Install a driver callback for IRQ acknowledge. This callback is used to get a vector for an IRQ line.

===== Syntax =====

==== Declaration ====

Declared in ''src/emu/cpuint.h'' as

<code|c>void cpunum_set_irq_callback(int cpunum, int (*callback)(int irqline));</code>

==== Parameters ====

  * ''cpunum'' -- Index to the CPU
  * ''*callback'' -- Pointer to a function that will be called when this IRQ is fired.

==== Returns ====

Nothing.

===== Example =====

<code|c>
static int irq_callback(int irq)
{
	return vectors[current_vector];
}

cpunum_set_irq_callback(0, irq_callback);
</code>

Function ''irq_callback'' will be called when the first CPU acknowledges an interrupt. As vector the CPU will receive a value from the array ''vectors''.

===== See also =====

{{topic>reference +cpu +irq&list&nodate&nodesc&nouser&notags}}

{{tag>reference mame cpu irq}}