diff --git a/drivers/descriptor/descriptor.h b/drivers/descriptor/descriptor.h
index fb1cf8e..f32eb53 100644
--- a/drivers/descriptor/descriptor.h
+++ b/drivers/descriptor/descriptor.h
@@ -5,6 +5,7 @@
 #include "../../lib/stdlib/stdlib.h"
 #include "../../lib/stdio/stdio.h"
 #include "../../lib/string/string.h"
+#include "../../memory/pmm/pmm.h"
 
 extern void isr0();
 extern void isr1();
diff --git a/drivers/descriptor/isr.c b/drivers/descriptor/isr.c
index 4e79951..797c491 100644
--- a/drivers/descriptor/isr.c
+++ b/drivers/descriptor/isr.c
@@ -40,8 +40,31 @@ static char*		exception_msg[] = {
     "Reserved"
 };
 
-void	isr_handler(registers_t* r) {
+void panic(registers_t* r) {
+    asm volatile("cli");
+    uint32_t stack = r->esp;
     printf("Number: %d | Message: %s\n", r->int_no, exception_msg[r->int_no]);
+    uint32_t* cp_stack = (uint32_t*)pmm_alloc_block();
+    for (uint32_t* ptr = (uint32_t*)stack; *ptr && ptr < (uint32_t*)stack + 0x1000; ptr++) {
+	*cp_stack++ = *ptr;
+    }
+    asm volatile(
+	"xor %eax, %eax\n"
+	"xor %ebx, %ebx\n"
+	"xor %ecx, %ecx\n"
+	"xor %edx, %edx\n"
+	"xor %edi, %edi\n"
+	"xor %esi, %esi\n" 
+	"xor %ebp, %ebp\n"
+	//"xor %eip, %eip\n" RD ONLY
+	"xor %esp, %esp\n"
+    );
+    asm volatile("hlt");
+
+}
+
+void	isr_handler(registers_t* r) {
+    panic(r);
 }
 
 void isr_install() {
diff --git a/drivers/keyboard/keyboard.h b/drivers/keyboard/keyboard.h
index 13d422b..28d72e9 100644
--- a/drivers/keyboard/keyboard.h
+++ b/drivers/keyboard/keyboard.h
@@ -8,6 +8,7 @@ void    init_keyboard();
 void    exec_command();
 void    cmd_add_char(uint8_t c);
 void    tests_string(int* total, int* success, int* failure);
+void    tests_stdlib(int* total, int* success, int* failure);
 
 typedef enum {
     SHELL,
diff --git a/drivers/keyboard/kshell.c b/drivers/keyboard/kshell.c
index 036df7f..ed32cd6 100644
--- a/drivers/keyboard/kshell.c
+++ b/drivers/keyboard/kshell.c
@@ -64,6 +64,7 @@ void exec_tests() {
     printf("TEST SUITE FOR THE KERNEL\n");
     //TODO: write test suite for functions that give an output
     tests_string(&total, &success, &failure);
+    tests_stdlib(&total, &success, &failure);
     printf("\nTEST SUITE DONE:\n  TOTAL   : %d\n  SUCCESS : %d\n  FAILURE : %d\n", total, success, failure);
 }
 
@@ -97,6 +98,75 @@ void print_stack() {
     printf("\n");
 }
 
+void int_0x0() { asm volatile("int $0x0"); }
+void int_0x1() { asm volatile("int $0x1"); }
+void int_0x2() { asm volatile("int $0x2"); }
+void int_0x3() { asm volatile("int $0x3"); }
+void int_0x4() { asm volatile("int $0x4"); }
+void int_0x5() { asm volatile("int $0x5"); }
+void int_0x6() { asm volatile("int $0x6"); }
+void int_0x7() { asm volatile("int $0x7"); }
+void int_0x8() { asm volatile("int $0x8"); }
+void int_0x9() { asm volatile("int $0x9"); }
+void int_0xA() { asm volatile("int $0xA"); }
+void int_0xB() { asm volatile("int $0xB"); }
+void int_0xC() { asm volatile("int $0xC"); }
+void int_0xD() { asm volatile("int $0xD"); }
+void int_0xE() { asm volatile("int $0xE"); }
+void int_0xF() { asm volatile("int $0xF"); }
+void int_0x10() { asm volatile("int $0x10"); }
+void int_0x11() { asm volatile("int $0x11"); }
+void int_0x12() { asm volatile("int $0x12"); }
+void int_0x13() { asm volatile("int $0x13"); }
+void int_0x14() { asm volatile("int $0x14"); }
+void int_0x15() { asm volatile("int $0x15"); }
+void int_0x16() { asm volatile("int $0x16"); }
+void int_0x17() { asm volatile("int $0x17"); }
+void int_0x18() { asm volatile("int $0x18"); }
+void int_0x19() { asm volatile("int $0x19"); }
+void int_0x1A() { asm volatile("int $0x1A"); }
+void int_0x1B() { asm volatile("int $0x1B"); }
+void int_0x1C() { asm volatile("int $0x1C"); }
+void int_0x1D() { asm volatile("int $0x1D"); }
+void int_0x1E() { asm volatile("int $0x1E"); }
+void int_0x1F() { asm volatile("int $0x1F"); }
+void int_0x20() { asm volatile("int $0x20"); }
+void int_0x21() { asm volatile("int $0x21"); }
+void int_0x22() { asm volatile("int $0x22"); }
+void int_0x23() { asm volatile("int $0x23"); }
+void int_0x24() { asm volatile("int $0x24"); }
+void int_0x25() { asm volatile("int $0x25"); }
+
+typedef void (*inter_func)(void);
+
+inter_func tab[] = {
+    int_0x0, int_0x1, int_0x2, int_0x3, 
+    int_0x4, int_0x5, int_0x6, int_0x7,
+    int_0x8, int_0x9, int_0xA, int_0xB,
+    int_0xC, int_0xD, int_0xE, int_0xF,
+    int_0x10, int_0x11, int_0x12, int_0x13,
+    int_0x14, int_0x15, int_0x16, int_0x17,
+    int_0x18, int_0x19, int_0x1A, int_0x1B,
+    int_0x1C, int_0x1D, int_0x1E, int_0x1F,
+    int_0x20, int_0x21, int_0x22, int_0x23,
+    int_0x24, int_0x25
+};
+
+void do_interrupt(char* nb) {
+    int n = atoi(nb);
+    if (n < 0 || n > 0x25) return;
+    tab[n]();
+}
+
+void shut_down() {
+    asm volatile(
+        "movw $0x2000, %ax\n"
+        "movw $0x604, %dx\n"
+        "outw %ax, %dx\n"
+        "hlt"
+    );
+}
+
 void    exec_command() {
     char words[4][256];
     size_t i = 0;
@@ -118,10 +188,14 @@ void    exec_command() {
         exec_tests();
     } else if (!strcmp(words[0], "REBOOT")){
         reboot();
+    } else if (!strcmp(words[0], "EXIT")){
+        shut_down();
     } else if (!strcmp(words[0], "HALT")){
         asm volatile("hlt\n\t");
     } else if (!strcmp(words[0], "STACK")){
         print_stack();
+    } else if (!strcmp(words[0], "INT")){
+        do_interrupt(words[1]);
     } else if (!strcmp(words[0], "HELP")) {
         printf("WELCOME TO THE KERNEL\n\
 THE CLI IS STILL UNDER DEVELOPMENT.\n\
@@ -132,8 +206,10 @@ COMMANDS AVAILABLE:\n\
     - KEYBOARD = TWO LAYOUT ARE AVAILABLE, FR AND US\n\
   CLEAR        : CLEARS THE CLI\n\
   REBOOT       : REBOOTS THE KERNEL\n\
+  EXIT         : SHUT DOWN THE KERNEL AND THE VM\n\
   HALT         : HALTS THE KERNEL\n\
   STACK        : PRINTS STACK\n\
+  INT   [NUM]  : DOES INTERRUPTION [NUM]\n\
   TEST         : EXECUTES A TEST SUITE FOR THE KERNEL\n\
   HELP         : PRINTS THIS MESSAGE\n");
     }
diff --git a/drivers/keyboard/tester.c b/drivers/keyboard/tester.c
index 57bce7a..5aef08a 100644
--- a/drivers/keyboard/tester.c
+++ b/drivers/keyboard/tester.c
@@ -79,3 +79,15 @@ void    tests_string(int* total, int* success, int* failure) {
 	printf("memset : failure\n");
     }
 }
+
+void tests_stdlib(int* total, int* success, int* failure) {
+    printf("\ntests for stdlib.h\n");
+    *total += 1;
+    if (atoi("5") == 5 && atoi("-5") == -5 && atoi("zda") == 0) {
+	*success += 1;
+	printf("atoi   : success\n");
+    } else {
+	*failure += 1;
+	printf("atoi   : failure atoi(5) == %d | atoi(-5) == %d | atoi('zda') == %d\n", atoi("5"), atoi("-5"), atoi("zda"));
+    }
+}
diff --git a/lib/stdlib/stdlib.c b/lib/stdlib/stdlib.c
index cb27796..0d81fc7 100644
--- a/lib/stdlib/stdlib.c
+++ b/lib/stdlib/stdlib.c
@@ -72,15 +72,15 @@ size_t  itoxx(char *dest, unsigned int n) {
 }
 
 inline int atoi(const char *nptr) {
-    if (!nptr) return 0x0;
-    int sign = 0x0;
-    while (*nptr && !isnum(*nptr)) {
+    if (!nptr) return 0;
+    int sign = 1;
+    if (*nptr == '+' || *nptr == '-') {
         if (*(nptr) == '-')
-            sign = 0xFF;
+            sign = -1;
         nptr++;
     }
-    int res = 0x0;
-    while (*nptr) {
+    int res = 0;
+    while (*nptr && isnum(*nptr)) {
         res = res * 0xA + *nptr - 0x30;
         nptr++;
     }
diff --git a/screenshots/HELPER.png b/screenshots/HELPER.png
index d802b7e..bfc465e 100644
Binary files a/screenshots/HELPER.png and b/screenshots/HELPER.png differ