Working PIT irqs, fix GDT bugs

kernel/platform/i386_pc/sys/isr.h

@@ -83,4 +83,20 @@ void irq13(void);
 void irq14(void);
 void irq15(void);
 
+#define ISR_PIT       32+0
+#define ISR_KBD       32+1
+#define ISR_COM2      32+3
+#define ISR_COM1      32+4
+#define ISR_LPT2      32+5
+#define ISR_FLOPPY    32+6
+#define ISR_LPT1      32+7
+#define ISR_CMOS_RTC  32+8
+#define ISR_FREE9     32+9
+#define ISR_FREE10    32+10
+#define ISR_FREE11    32+11
+#define ISR_PS2_MOUSE 32+12
+#define ISR_FPU       32+13
+#define ISR_PRIM_ATA  32+14
+#define ISR_SCND_ATA  32+15
+
 #endif // _SYS_ISR_H