diff --git a/kaleid/kernel/io/spkr.c b/kaleid/kernel/io/spkr.c
index 697a7a9..74488e9 100644
--- a/kaleid/kernel/io/spkr.c
+++ b/kaleid/kernel/io/spkr.c
@@ -98,7 +98,7 @@ void IoDoStarWars(void)
                             {440, 200}, {110, 200}, {110, 200}, {110, 200}
                           };
 
-    //bprintf(BStdOut, "\n");
+    bprintf(BStdOut, "Address of the score : %p\n", &score[37]);
 
     for (uint i = 0; i < 40; i++) {
         //IoDoTone(score[i].tone, score[i].time);
diff --git a/kaleid/kernel/ke/idt.c b/kaleid/kernel/ke/idt.c
index d5dc7e2..5829914 100644
--- a/kaleid/kernel/ke/idt.c
+++ b/kaleid/kernel/ke/idt.c
@@ -132,7 +132,7 @@ void KeSetupIDT(void)
     KeSetIDTGate(0x09, (ulong)isr9, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x0A, (ulong)isr10, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x0B, (ulong)isr11, codeSeg, 0x8E, 0);
-    KeSetIDTGate(0x0C, (ulong)isr12, codeSeg, 0x8E, 1);
+    KeSetIDTGate(0x0C, (ulong)isr12, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x0D, (ulong)isr13, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x0E, (ulong)isr14, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x0F, (ulong)isr15, codeSeg, 0x8E, 0);  // INTEL RESERVED
@@ -154,7 +154,7 @@ void KeSetupIDT(void)
     KeSetIDTGate(0x1F, (ulong)isr31, codeSeg, 0x8E, 0);  // INTEL RESERVED
 
     // Set IDT IRQs Gates
-    KeSetIDTGate(0x20, (ulong)isr32, codeSeg, 0x8E, 0);
+    KeSetIDTGate(0x20, (ulong)isr32, codeSeg, 0x8E, 2);
     KeSetIDTGate(0x21, (ulong)isr33, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x22, (ulong)isr34, codeSeg, 0x8E, 0);
     KeSetIDTGate(0x23, (ulong)isr35, codeSeg, 0x8E, 0);
diff --git a/kaleid/kernel/mm/gdt.c b/kaleid/kernel/mm/gdt.c
index eb3c4e3..2cc0477 100644
--- a/kaleid/kernel/mm/gdt.c
+++ b/kaleid/kernel/mm/gdt.c
@@ -53,7 +53,8 @@ void MmInitGdt(void)
     tssDesc.veryHighBase    = ((ulong)&tss >> 32) & 0xFFFFFFFF;
     tssDesc.lowLimit        = sizeof(tss);
 
-    tss.ist1 =  0x0007FFFF; // RESCUE STACK, GARANTIED FREE FOR USE BY OSDEV.ORG
+    tss.ist1 = 0x0007FFFF;  // ISR RESCUE STACK, GARANTIED FREE FOR USE BY OSDEV.ORG
+    tss.ist2 = 0x00EFFFFF;  // ISR STACK, GARANTIED FREE FOR USE BY OSDEV.ORG
     tss.iomap_base = sizeof(tss);
 
     memmove(&gdt[2], &tssDesc, sizeof(TssDescriptor_t));