diff --git a/lib/irq.c b/lib/irq.c
new file mode 100644
index 0000000..6c78754
--- /dev/null
+++ b/lib/irq.c
@@ -0,0 +1,36 @@
+void setpic(void)
+{
+	/* MASTER */
+	/* Initialisation de ICW1 */
+	outbp(0x20,0x11);
+	/* Initialisation de ICW2 - vecteur de depart = 32 */
+	outbp(0x21,0x20);            
+	/* Initialisation de ICW3 */
+	outbp(0x21,0x04);
+	/* Initialisation de ICW4 */
+	outbp(0x21,0x01);
+	/* masquage des interruptions */
+	outbp(0x21,0xFF);
+	/* SLAVE */
+	/* Initialisation de ICW1 */
+	outbp(0xA0,0x11);
+	/* Initialisation de ICW2 - vecteur de depart = 96 */
+	outbp(0xA1,0x70);      
+	/* Initialisation de ICW3 */
+	outbp(0xA1,0x02);
+	/* Initialisation de ICW4 */
+	outbp(0xA1,0x01);
+	/* masquage des interruptions */
+	outbp(0xA1,0xFF);
+	/* Demasquage des irqs */
+	outbp(0x21,0xFD);
+}
+
+void makeidtdesc(u32 offset, u16 select, u16 type, idtdesc* desc) 
+{
+	desc->offset0_15 = (offset & 0xffff);
+	desc->select = select;
+	desc->type = type;
+	desc->offset16_31 = (offset & 0xffff0000) >> 16;
+	return;
+}